Method of methanol obtaining

FIELD: chemistry.

SUBSTANCE: method is realised by a contact of a feeding flow, enriched with hydrogen and carbon monoxide, with a catalyst of methanol synthesis. The obtained in this way technological flow is cooled, condensed and subjected to separation into a gas phase and a liquid phase with raw methanol. As the feeding flow used is synthesis-gas, obtained by steam gasification of charcoal, representing a product of pyrolysis of preliminarily dried wood wastes. Before the contact of the feeding flow with the catalyst, containing in a mole ratio CuO:ZnO:Cr2O3:MnO:MgO:Al2O3:BaO, equal to 1:0.3:(0.15-0.2):(0.05-0.1):(0.05-0.1):(0.25-0.3):0.05 respectively, its compressing to pressure 3.5-4.5 MPa is performed. After that the flow is supplied into a reactor, where a temperature of 250-300C is supported due to evaporation of recycled water, released from raw methanol, with steam from recycled water from the reactor being directed to charcoal gasification. Cooling of the technological flow is realised conductively from the feeding flow, and condensation is performed by throttling. After separation the gas phase is divided into two flows, one flow is directed for combustion into a pyrolysis chamber, and the second flow is directed to ejection with a ratio of the gas flow to the feeding flow equal to 10:1, respectively.

EFFECT: invention makes it possible to obtain methanol in a waste-free environmentally friendly way without application of additional energy resources.

1 dwg

 

The invention relates to a method for producing methanol and can be used in the chemical industry.

A method of producing methanol, which is mixed synthesis gas with a circulating gas from the gas mixture is heated in a recuperator, is passed through optional pre-installed adiabatic rector for the partial synthesis of methanol with increasing temperature, the resulting reaction mixture is cooled in the heat-recovery heat exchanger until the temperature of the beginning of the reaction in the first layer of the main methanol synthesis reactor, reacted gas is cooled, emit the condensed methanol crude and lead the division neskondensirovannyh gas flow on the return and vent, return air stream is compressed in the circulation compressor and fed to the mixing with the synthesis gas, the purge gas is removed from the system, see EN Patent No. 2289566, IPC SS 29/151 (2006.01), SS 31/04 (2006.01), B07J 8/06 (2006.01), 2005.

The described method requires high material costs due to the presence of two expensive reactors: regenerating and recycling, as the lack of a conclusion from system purge gas.

There is also known a method of producing methanol, comprising mixing the main stream of the synthesis gas from the circulation gas, divide the mixture into two streams, heat is s one of the threads to the initial temperature of synthesis. The heated stream is fed to the input of the first catalyst layer and the cold stream is divided into streams and sent to the rector in the form of cold chambers between catalyst. Then the reacted gas is cooled, emit the condensed metanalyses and neskondensirovannyh the gas flow is divided into the purge gas, which is discharged from the system, and the gas stream, which is compressed in the compressor and directed to the circulation. In existing chambers of the last two layers of catalyst addition enter the stream of synthesis gas, see RU Patent No. 2291851, IPC SS 31/04 (2006.01), SS 29/151 (2006.01), 2005.

The disadvantage of this method is the complexity of the technological process due to the presence of a large number of operations for the separation of flows and the allocation of system purge gas.

Closest to the proposed method is a method of producing methanol by contact of the feed stream enriched in hydrogen and carbon monoxide with a catalyst to produce process flow with subsequent cooling, condensation, separation of gas and liquid phase with crude methanol, which process stream containing by-products, and the resulting contact of the feed stream with a catalyst, which is active in the reaction of hydrogen and carbon monoxide methanol, cool in the refrigerator for up to a temperature of between 20 and 200C, then lead his contact with the hydrogenation catalyst based on a noble metal, or contains 10-95 wt.% copper, and which is active in the hydrogenation reaction of such by-products as aldehydes and ketones, and after contacting the process stream is cooled by the water cooler, or in the second fridge, leads to condensation and separation with subsequent separation of the gas phase and the liquid phase from the crude methanol, see RU Patent No. 2345056, IPC SS 31/04 (2006.01), SS 29/151 (2006.01), SS 27/06 (2006.01), SS 29/145 (2006.01), 2003.

The disadvantages of this method are the complexity of the technological process through the use of additional catalyst for hydrogenation, possibly with the use of noble metals that can catalyze additional reactions of formation of methane, and high cost due to the presence of two refrigerators, moreover, after separation of the methanol gas phase may take in the atmosphere.

The task of the invention is to create a waste-free environmentally friendly method of producing methanol.

The technical problem is solved by a method of producing methanol by contact of the feed stream enriched in hydrogen and carbon monoxide, with the methanol synthesis catalyst to produce process on the eye, with further cooling, condensation and separation in the gas phase and the liquid phase from the crude methanol, in which the feed stream using synthesis gas from steam gasification of charcoal by pyrolysis pre-dried wood waste, before the contacting of the feed stream with a catalyst containing a molar ratio of CuO:ZnO:Cr2O3:MnO:MgO:A12About3:HLW equal 1:0,3:(0,15-0,2):(0,05-0,1):(0,05-0,1):(0,25-0,3):0,05, accordingly, the exercise of its compression to a pressure of 3.5 to 4.5 MPa and then sent to the reactor, which keep the temperature of 250-300C due To the evaporation of the circulating water discharged from the crude methanol, while the steam from the circulating water from the reactor is directed to the gasification of charcoal, cooling the process stream exercise conducted from the supply flow and the condensation is carried out by throttling, after separation of the gas phase divided into two streams, with one stream is sent for incineration in the pyrolysis chamber, and the second stream is directed to the ejection ratio of the gas stream to the feed stream, is equal to 10:1, respectively.

Technical solution allows to obtain the methanol in the process waste organic production without the use of additional energy resources.

The method is carried out is as follows, see Figure 1: wood waste guide screw feeder 4 into the chamber convective drying 3 pre-dried wood waste received in the pyrolysis chamber 7, where the decomposition of wood by coal and pyrolysis gases. The pyrolysis gases enter the furnace 8, made in the form of shirts pyrolysis chamber 7, the received flue gases from the furnace 8 is mixed with air entering through the orifice 6, is directed to the drying of wood waste in the camera convective drying 3 exhaust flue gases from the chamber convective drying 3 are discharged through exhaust fan 2 through the pipe 1. Charcoal from the pyrolysis chamber 7 flows into the separator pyrogas 9, from which a screw feeder 5 enters the steam gasifier 10, where the saturation of its steam derived from the steam generator 18, receive the synthesis gas. Produced synthesis gas enters the regenerative heat exchanger 16 of the reactor 26 where pre is heated feed stream that is directed to the contacting with the catalyst 19, containing in molar ratio:

CuO:ZnO:CR2O3:MnO:MgO:A12About3:HLW equal, 1:0,3:(0,15-0,2):(0,05-0,1):(0,05-0,1):(0,25-0,3):0,05, respectively. The specified catalyst is described, see RU Patent No. 2175886, IPC7B01J 23/72, B01J 23/80, B01J 23/86, B01J 23/887, B01J 21/04, B01J 21/10, C07C 31/04, 2001. Feed stream passes: cleanup from ash and part of the carbon in the cyclone 12, mixed in the ejector mixer 13 with a gas flow from the separator 21, then the ventilator 14 the cleaned gas accumulate in the tank 15, the output of which his komprimiert to pressure of 3.54.5 MPa (see POS - compressor) and sent to the reactor 26 to maintain the temperature of 250-300C, carried out by the steam generator 18 by evaporation of the circulating water from the distillation column 22. Steam from the steam generator 18 is divided into two streams: one is directed to the gasification of charcoal in the steam gasifier 10, and the second in the lower part of the distillation column 22. Received the process stream after contacting of the feed stream with the catalyst in the rector 26 is cooled conductive from the supply flow regenerative heat exchanger 16 and the additional heat exchanger 17, further flow through the orifice 20 into the separator 21, the gas phase in the separator 21 is divided into two streams. One stream is sent for incineration in the separator Pirogov 9, and the second stream is directed to the ejection in the ejector mixer 13 in the ratio, adjustable orifice 11, the gas stream to the feed stream, is equal to 10:1, respectively. The liquid phase from the crude methanol from the separator 21 is served in the distillation column 22, where the separation of methanol and water. Water from the bottom of rectificate the authorized column 22, using it as recycled water is fed to the evaporation in the steam generator 18, and to maintain pressure in the steam generator 18 is used, the throttle 23. Couples in a distillation column rising into the upper part of the column, cooled and condensed in the condenser 24 where the liquid methanol is supplied to the collector of methanol, 25, and part in the form of phlegmy fed back to the distillation column 22.

Thus, the claimed object will allow you to get the methanol in the waste-free production process without the use of additional energy resources.

A method of producing methanol by contact of the feed stream enriched in hydrogen and carbon monoxide, with the methanol synthesis catalyst to produce process flow, with subsequent cooling, condensation and separation in the gas phase and the liquid phase from the crude methanol, characterized in that the quality of the power flow using synthesis gas from steam gasification of charcoal by pyrolysis pre-dried wood waste, before the contacting of the feed stream with a catalyst containing a molar ratio of CuO:ZnO:Cr2O3:MnO:MgO:A12About3:HLW equal 1:0,3:(0,15-0,2):(0,05-0,1):(0,05-0,1):(0,25-0,3):0,05 accordingly, the exercise of its compression to a pressure of 3.5 to 4.5 MPa and then sent to eactor, where support 250-300C due To the evaporation of the circulating water discharged from the crude methanol, while the steam from the circulating water from the reactor is directed to the gasification of charcoal, cooling the process stream exercise conducted from the supply flow and the condensation is carried out by throttling, after separation of the gas phase is divided into two streams, with one stream is sent for incineration in the pyrolysis chamber, and the second stream is directed to the ejection ratio of the gas stream to the feed stream, is equal to 10:1, respectively.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing methanol, dimethyl ether and low-carbon olefin from synthesis gas. The method includes a step of contacting synthesis gas with a catalyst under conditions for converting the synthesis gas into methanol, dimethyl ether, and low-carbon olefins, characterised, wherein the catalyst contains an amorphous alloy consisting of components M-P, M-B or M-B-P, wherein component M represents two or more elements selected from lanthanides and the third, fourth and fifth series of groups IIIA, IVA, VA, IB, IIB, IVB, VB, VIB, VIIB and VIII of the Periodic Table of Elements.

EFFECT: method increases selectivity of the target product by conducting the process in conditions which ensure high conversion of CO and availability of carbon.

16 cl, 3 dwg, 3 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention describes a methanol synthesis method which comprises conversion of hydrocarbon-containing material to obtain synthesis gas (1) containing carbon monoxide and hydrogen and a reaction between components of fresh synthesis gas in a synthesis loop (10) to obtain raw methanol and removing hydrogen-containing purge gas (20) from the synthesis loop. The purge gas is heated by heat recuperation via indirect heat exchange with at least one high-temperature heat source in said method, said heat source being adapted to heat purge gas to temperature not lower than 200C to obtain a heated purge gas (33), and said heated purge gas, as such, is expanded in a corresponding expander (34), and energy is obtained due to expansion of the purge gas in the expander, wherein said high-temperature heat source used is hot waste gas from the conversion process, wherein the material is converted to fresh synthesis gas (1) or a stream of hot steam. The invention also relates to a methanol synthesis apparatus and a method of reconstructing a methanol synthesis apparatus.

EFFECT: disclosed objects improve overall energy balance of the process.

13 cl, 2 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method for synthesis of methanol, wherein raw methanol (101) is obtained in a synthesis section and purified in a distillation section (D) to obtain pure methanol (104), a stream (103) of instantaneously escaping gas and by-products (105, 106). At least a portion of said stream (103) of instantaneously escaping gas is treated to separate from said gas a stream (110) containing methanol, and that methanol-containing stream (110) is returned to the distillation section (D) to increase pure methanol production volume, wherein pressure of at least a portion of the stream (103) of the instantaneously escaping gas is raised before treating the stream (103) of the instantaneously escaping gas to separate the methanol-containing stream. The invention also relates to an apparatus for carrying out said method and a method of renovating said apparatus.

EFFECT: method enables to increase pure methanol production volume, safe power consumption and reduce emission of pollutants.

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SUBSTANCE: method includes heating of source natural gas, mixing of superheated steam with source natural gas, one-stage conversion of gas and steam mixture in reformer to converted gas, cooling of converted gas and its division into two flows. The first flow is subject to one-stage catalytic conversion to methanol while the second flow is subject to catalytic synthesis with production of liquefied hydrocarbon gas which is sent to conversion together with source natural gas and liquid hydrocarbons subjected to stabilisation in rectification tower. Plant for implementation of the above method is suggested also in order to produce synthetic liquid hydrocarbons and methanol; the plant is integrated into production train facilities.

EFFECT: effective coproduction of methanol and synthetic liquid hydrocarbons in the same flow diagram during processing.

15 cl, 1 dwg

FIELD: oil and gas industry.

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24 cl, 1 dwg

FIELD: chemistry.

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FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing methanol by bringing a feed stream rich in hydrogen and carbon monoxide in a reactor into contact with a methanol synthesis catalyst to obtain a process stream, followed by cooling thereof, condensation and separation into a gas phase and a liquid phase with crude methanol. The feed stream used is cleaned gas which is obtained by direct-flow gasification of wood processing wastes. The feed stream is enriched with hydrogen by controlled electrolysis of recycled water before bringing the feed stream into contact with a catalyst containing the following, wt %: copper oxide 62, zinc oxide 31, aluminium oxide 7. The feed stream is compressed to pressure of 4.5-5 MPa and then divided into two streams. One stream is fed into the reactor onto the catalyst for contacting through a heat exchanger which simultaneously cools the process stream. The other stream is fed directed onto the catalyst for contacting and reaction temperature is maintained at 250-270C. After final cooling of the process stream in the still residue of the distillation apparatus, it is separated by throttling into a gas phase and a liquid phase. After separation, the gas phase is divided into two streams. One stream is fed for oxidation into a direct-flow gasifier and the other is mixed with the feed stream before compression.

EFFECT: invention enables to obtain the desired product via a wasteless method using one readily available catalyst.

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FIELD: process engineering.

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FIELD: explosives.

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5 cl, 2 ex, 2 dwg

FIELD: chemistry.

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9 cl, 4 ex, 1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention describes a methanol synthesis method which comprises conversion of hydrocarbon-containing material to obtain synthesis gas (1) containing carbon monoxide and hydrogen and a reaction between components of fresh synthesis gas in a synthesis loop (10) to obtain raw methanol and removing hydrogen-containing purge gas (20) from the synthesis loop. The purge gas is heated by heat recuperation via indirect heat exchange with at least one high-temperature heat source in said method, said heat source being adapted to heat purge gas to temperature not lower than 200C to obtain a heated purge gas (33), and said heated purge gas, as such, is expanded in a corresponding expander (34), and energy is obtained due to expansion of the purge gas in the expander, wherein said high-temperature heat source used is hot waste gas from the conversion process, wherein the material is converted to fresh synthesis gas (1) or a stream of hot steam. The invention also relates to a methanol synthesis apparatus and a method of reconstructing a methanol synthesis apparatus.

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24 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing methanol by bringing a feed stream rich in hydrogen and carbon monoxide in a reactor into contact with a methanol synthesis catalyst to obtain a process stream, followed by cooling thereof, condensation and separation into a gas phase and a liquid phase with crude methanol. The feed stream used is cleaned gas which is obtained by direct-flow gasification of wood processing wastes. The feed stream is enriched with hydrogen by controlled electrolysis of recycled water before bringing the feed stream into contact with a catalyst containing the following, wt %: copper oxide 62, zinc oxide 31, aluminium oxide 7. The feed stream is compressed to pressure of 4.5-5 MPa and then divided into two streams. One stream is fed into the reactor onto the catalyst for contacting through a heat exchanger which simultaneously cools the process stream. The other stream is fed directed onto the catalyst for contacting and reaction temperature is maintained at 250-270C. After final cooling of the process stream in the still residue of the distillation apparatus, it is separated by throttling into a gas phase and a liquid phase. After separation, the gas phase is divided into two streams. One stream is fed for oxidation into a direct-flow gasifier and the other is mixed with the feed stream before compression.

EFFECT: invention enables to obtain the desired product via a wasteless method using one readily available catalyst.

1 dwg

FIELD: explosives.

SUBSTANCE: invention relates to the method for production of methanol from synthesis gas, including a stage of synthesis gas compression, a stage of catalytic conversion of synthesis gas into methanol in a reactor unit, comprising several catalytic reactors, including operations of heating and conversion of synthesis gas into methanol in each reactor, an operation of reaction products cooling and methanol release after each reactor, an operation of end gases recycling. Besides, the process is carried out under various pressures and with catalysts loaded into reactors with alternating activity under axial and/or radial direction of reagent flow in catalytic reactors in the temperature range of 160-290C, pressure range of 3-15 MPa, volume speeds of flow 500-10000 hr-1.

EFFECT: method makes it possible to increase efficiency of the process and to produce raw methanol of high quality.

5 cl, 2 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to an oil medium which is suitable for producing dimethyl ether and/or methanol which is used in a synthesis reaction with a suspended layer as a medium which contains a basic component in form of a branched saturated aliphatic hydrocarbon containing 16-50 carbon atoms, 1-7 tertiary carbon atoms, 0 quaternary carbon atoms and 1-16 carbon atoms in branched chains bonded with tertiary carbon atoms; wherein at least one tertiary carbon atom is bonded with hydrocarbon chains with length of 4 or more carbon atoms, lying in three directions. The invention also relates to a method of producing dimethyl ether and a mixture of dimethyl ether and methanol using said oil medium.

EFFECT: use of the present oil medium ensures high efficiency of synthesis.

9 cl, 4 ex, 1 tbl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to multireactor system and method of production by equilibrium-limited reaction. System comprises reaction vessel to sustain working temperatures and pressures of reactions. Note here that said vessel has multiple reaction zones made by separation walls, separation tank to sustain said temperatures and pressures. Note also that said separation tank has multiple separation zones made by separation walls and reaction sets comprising multiple heat exchangers for feed-and-discharge flows. Note that heat exchanger of first reactor set interacts with reaction zone via feed flow while heat exchangers of the other reactor sets interact with reaction zone via return flow.

EFFECT: higher efficiency of methanol cascade system.

20 cl, 7 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing methanol from natural gas, involving heating starting natural gas, obtaining superheated steam from prepared water and mixture thereof with the starting natural gas, single-step conversion of the vapour-gas mixture in a reforming furnace into converted gas, cooling the converted gas and single-step catalytic conversion of the converted gas into methanol in a synthesis reactor, wherein the heat of flue gases from the reforming furnace is used to heat the starting natural gas and the prepared water, superheating the steam and vapour-gas mixture, as well as heating the converted gas before inlet into the synthesis reactor. The invention also relates to apparatus for realising the described method.

EFFECT: use of the present invention increases efficiency of recycling energy from heat flux while simultaneously simplifying the conversion and synthesis processes.

11 cl, 1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: in order to produce synthetic gas containing hydrogen and carbon monoxide, starting material containing methane undergoes partial oxidation using a multichannel burner fitted with a system of separate channels. Methane-containing material, at temperature higher than 500C, flows through one channel of the burner and oxidising gas flows through another channel. The channel for the methane-containing material and the channel for the oxidising gas are separated from each other by a channel through which a second gas containing hydrogen, carbon monoxide and/or hydrocarbon flows, where the second gas is at temperature 10C lower than its spontaneous ignition temperature. The second gas is obtained from gaseous by-products of a Fischer-Tropsch synthesis process or from gaseous by-products of a methanol synthesis process.

EFFECT: improved process.

22 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a methanol synthesis method, during realisation of which natural gas and water vapour are fed into a primary conversion section where the two interact to form a gaseous mixture containing CO, CO2, H2 in stoichiometric excess and CH4. Said gaseous mixture containing CO, CO2, H2 in stoichiometric excess and CH4 is fed into a methanol synthesis section where a reaction takes place to produce methanol and the gas stream containing CO, CO2, H2 and CH4 is collected from the methanol synthesis section by blowing. H2 is extracted from the gas stream collected from the methanol synthesis section to obtain a first gaseous phase primarily consisting of H2, and a second gaseous phase containing CO, CO2, H2 and CH4 and essentially not containing H2. The second gaseous phase containing CO, CO2, H2 and CH4 and essentially not containing H2 is then recuperated for use in the conversion process in the primary conversion section. Nitrogen is first removed from natural gas before feeding the natural gas into the primary conversion section. The invention also relates to apparatus for realising the disclosed method.

EFFECT: obtaining end product with high efficiency at low operational and capital expenses and low power consumption.

8 cl, 1 dwg, 1 ex

Methanol synthesis // 2408567

FIELD: chemistry.

SUBSTANCE: present invention relates to a methanol synthesis method involving the following steps: (i) reforming hydrocarbon starting material and separation of water from the resulting mixture with gas reforming to obtain freshly prepared gas containing hydrogen and carbon oxides, where the said mixture with freshly prepared gas has stoichiometric coefficient R defined by the formula: R=([H2]-[CO2])/([CO2]+[CO]), which is less than 2.0; (ii) formation of a mixture of synthetic gas consisting of a stream of said freshly prepared gas, unreacted synthetic gas and hydrogen; (iii) passing the mixture with synthetic gas at high temperature and pressure through a methanol synthesis catalyst bed to obtain a stream of product containing methanol and unreacted synthetic gas; (iv) cooling said stream of product with extraction of a stream of crude methanol from said unreacted synthetic gas; (v) removal of a portion of said unreacted synthetic gas as blowout gas, and (vi) feeding the remaining unreacted synthetic gas to step (ii). Hydrogen is extracted from at least a portion of said blowout gas and a portion of said freshly prepared gas and the extracted hydrogen is added to the mixture with synthetic gas.

EFFECT: disclosed method lowers volume of catalyst and amount of wastes, reduces size of reactors and simplifies purification of crude methanol, which lowers cost of the process.

12 cl, 3 ex, 3 dwg

FIELD: technology for production of methanol from syngas.

SUBSTANCE: claimed method includes mixing of hydrocarbon raw material with water steam to provide syngas by steam conversion of hydrocarbon raw material and subsequent methanol synthesis therefrom. Conversion of hydrocarbon raw material and methanol synthesis are carried out under the same pressure from 4.0 to 12.0 MPa. In one embodiment hydrocarbon raw material is mixed with water steam and carbon dioxide to provide syngas by steam/carbonic acid conversion of hydrocarbon raw material in radial-helical reactor followed by methanol synthesis therefrom under the same pressure (from 4.0 to 12.0 MPa). In each embodiment methanol synthesis is carried out in isothermal catalytic radial-helical reactor using fine-grained catalyst with grain size of 1-5 mm. Methanol synthesis is preferably carried out in two steps with or without syngas circulation followed by feeding gas from the first or second step into gasmain or power plant.

EFFECT: simplified method due to process optimization.

12 cl, 3 tbl, 3 dwg

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