The method of refining crude oil or condensate

 

(57) Abstract:

Usage: petrochemistry. The inventive desalted and dehydrated oil or gas is mixed with oxygen-containing organic solvent having a boiling point of 56 83°C and taken in an amount of 2.0 to 20.0. then contact in the environment of hydrogen with Ecumenical or aluminoborosilicate catalyst having a pore volume of not less than 0.45 cm3/g with a predominant pore 80 100 and characterized by the index of strength of not less than 1.1 kg/mm Process is performed at 300 to 450°C., the pressure 35,0 45,0 ATI. The resulting product fractionary. table 1.

The invention relates to the refining and petrochemical industries, in particular to methods for processing of oil and gas condensate.

Known methods of refining [1-2] including preliminary fractionation desalted and dewatered oil and subsequent processing of the narrow oil fractions, leading to the formation of significant quantities of residual oil with a high content of sulfur, heavy metals and difficult processing.

One of the ways of solving the problem of increasing the output of low-sulfur light oil and is obtained by distillation.

Currently, the methods of separate hydrofining of petroleum fractions: gasoline, kerosene, diesel fractions. There are publications on the Hydrotreating of the heavy oil feedstock [3-5]

However, currently known approaches to separate hydrofining petroleum fractions not applicable for refining in General.

The closest solution to the technical essence and the achieved result is a method of Hydrotreating a hydrocarbon feedstock, in particular vacuum gasoil or deasphalting residual oil [6] However, this method also does not allow for hydrofining oil or gas condensate at the stage of preliminary processing, i.e. before fractionation, when composed of a wax substance.

The aim of the invention is to produce clean diesel fuel and low-sulfur fuel oil without additional capital expenditures.

This goal is achieved by contacting demineralized or dewatered feedstock with Ecumenical or aluminoborosilicate catalyst in the environment of hydrogen at elevated temperatures and pressures in lovietonycl with a boiling point 56-83aboutWith that taken in an amount of 2-20% by volume of the feedstock, and the contacting is carried out with a catalyst having a pore volume of not less than 0.45 cm3/g with a predominant pore 80-100 and characterized by the index of strength of not less than 1.1 kg/mm at a temperature of 300-450aboutAnd pressure of 35-45 MPa, followed by fractionation of the resulting product.

The basis of the proposed method of refining is the process of hydrofining oil with subsequent separation into fractions. During hydrofining oil flow processes Hydrotreating, light cracking in the environment of hydrogen. The result is the obtaining of oil with low content of sulphur, nitrogen and heavy metals. In addition, significantly increased the yield of liquid light hydrocarbons.

An important advantage of the proposed method is the possibility of profitable processing of heavy and sour crude oils, the processing of which by the usual options is difficult and requires dilution other varieties with high levels of light and lower sulfur content.

The process hydrofining oil in a mixture with organic solvent with specific boiling temperature in the presence of the Hydrotreating process feedstock (dehydrated and desalted crude oil or gas condensate) prior to their separation into different fractions. Holding hydrofining of raw materials to its fractionation increases the yield of light fractions with a lower content of sulfur compounds and allows you to get low-sulfur fuel oil without further purification.

In the known methods of refining the application of the described technology is unknown. Therefore, this solution meets the criteria of "novelty" and "significant difference".

P R I m e R 1. The raw material used oil with the following physical-chemical characteristics: density 8620 kg/m3the viscosity at 20aboutWith 14.2 mm2/s; temperature,aboutC: pour point (- 42), flash (in close. the crucible) (- 38); the content, wt. paraffin 2,1, sulfur 1,98, nitrogen 0,17, asphaltenes 4; coking ability of 5.3% yield fractions, about. 200 24; up to 350 49.

98 ml of oil specified composition was mixed with 2 ml of acetone (boiling point 56aboutC).

The resulting mixture was subjected to hydrofining at a temperature of 300aboutC, hydrogen pressure of 35 MPa at lookbetteronline.com catalyst with a total volume of 0.45 cm3/g, predominant pore 80 , the index of the strength of the catalyst 1.1 kg/mm

Conducted fractionation obtained hydrogenated feed is cut, the way you are already at the first stage of refining to get from vysokosernistaja raw material raw material reforming and Hydrotreating diesel fractions with relatively low sulfur content. In addition, at the same time, sweet crude oil. The same table lists the parameters of the process, the raw materials used catalyst, as well as the quality of the obtained hydrogenated feed is separated in examples 2-7. The sequence of operations used to test a sample of oil when running examples 2 to 6 is similar to example 1. The sequence of operations according to example 7 is also similar to example 1, but in the quality of raw materials used, the condensate having the following characteristics: Density at 20aboutC, kg/m3806

Fractional composition,aboutN. K. 50 10% 100 50% 200 90% 270 K. K. 320

Content, wt. Sulfur total of 1.5 Sulfur mercaptan 0.34 Nitrogen 0.03 Resin 1,6 Asphaltenes 0.2 Fraction5200about53 Fraction5350aboutWith 100 vanadium, g/t 0.2 Nickel, g/t 0,2

Conducted on the basis of the results of test calculations showed that the service life of the catalyst of the invention will be at least 3 years, mainegenealogy mileage 1 months. The use of the catalyst with the value of the index strength less than 1.1 kg/mm will reduce mainegenealogy mileage up to 2 months, and the total lifetime of the catalyst up to 1 year.

A METHOD of PROCESSING OIL OR GAS by contacting the lunch hydrogen at elevated temperature and pressure, characterized in that the feedstock prior to contacting the pre-mix with oxygen-containing organic solvent with a boiling point of 56 83oWith that taken in an amount of 2.0 to 20.0% by volume of the feedstock, and the contacting is carried out with a catalyst having a pore volume of not less than 0.45 cm3/g with a predominant pore and characterized by the index of strength of not less than 1.1 kg/mm, at a temperature of 300 450oC and a pressure of 35 to 45 MPa, followed by fractionation of the resulting product.

 

Same patents:

FIELD: petroleum processing catalysts.

SUBSTANCE: invention relates to catalysts for deep hydrofining of hydrocarbon feedstock, in particular diesel fractions, to remove sulfur compounds. Invention, in particular, provides catalyst for hydrodesulfurization of diesel fractions including active component selected from group VIII and VIB metal oxides dispersed on alumina carrier, which is, in particular, composed of aluminum oxides, 85-95%, and H form or cation-substituted form of zeolite ZSM-5, mordenite, zeolite BEA, or zeolite Y, 5-15%. Active component is selected from oxides of molybdenum and cobalt and/or nickel. Carrier preparation method comprises precipitation of aluminum hydroxide, incorporation of zeolite in H form or cation-substituted form in amount 5-15% (based on final product) and peptizing agent into aluminum hydroxide powder, extrusion of resulting mixture, drying, and calcination at 450-600°C. Preparation of catalyst includes impregnation of above-defined carrier with complex solution of group VIII and VI metal salts in air or nitrogen flow at temperature not higher than 200°C. Diesel fraction hydrodesulfurization process is also described.

EFFECT: enhanced purification of diesel fractions.

10 cl, 2 tbl, 14 ex

FIELD: chemistry, organic, processing of hydrocarbons.

SUBSTANCE: invention is related to an improved method for hydroprocessing of hydrocarbon raw stock containing sulphur- and/or nitrogen-bearing contaminants. The method comprises the first contact interaction of hydrocarbon raw stock with hydrogen in the presence of at least one first catalyst based on VIII group metals on an acidic carrier, the carrier being selected from the group of zeolites and zeolite-bearing carriers, and then the flow leaving the first catalyst directly contacts hydrogen in the presence of at least one second catalyst based on a VIII group metal on a less acidic solid carrier, said solid carrier being selected from the group of carriers based on silicon dioxide-aluminium oxide and other solid carriers that are not zeolites. Said combination of two catalyst layers allows processing of raw stock with a high content of contaminating impurities without high-level cracking that involves the use of highly acidic carriers.

EFFECT: processing of hydrocarbon raw stock with contaminating impurities without high-level cracking.

14 cl, 1 ex

FIELD: mining.

SUBSTANCE: invention refers to method of refining of light fractions of secondary origin consisting in separation of wide benzene spread into light and heavy fractions, and in hydro-upgrading of heavy fraction at raised temperature and pressure in presence of catalyst with successive mixing of light fraction and hydro-upgraded heavy fraction; as wide benzene spread there is used fraction boiled out within C3-220°C; light fraction before mixing with hydro-upgraded heavy fraction is subject to sulphur refining by means of extracting with alkali, to successive fractioning and to extracting gas fractions ΣC3 and ΣC4 out of it.

EFFECT: upgraded quality of end products due to reduced sulphur contents in gas fractions and in benzene fraction at simultaneous maintaining its octane number.

4 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of removing contaminant sulphur compounds, particularly thiophene sulphur compounds, from hydrocarbon material, which involves bringing the material into contact with a sulphided nickel adsorbent in the presence of hydrogen, where part of the nickel is present in metallic form, for which the kinetic constant during hydrogenation of tetraline at 150°C is less than 0.01 l/s.g of catalyst, in which a) the nickel adsorbent additionally contains a metal oxide, which forms stable sulphides in conditions used in the process of removing contaminant sulphur compounds from hydrocarbon material, or b) in which the said hydrocarbon material is treated by a metal oxide, which forms stable sulphides in the process of removing contaminant sulphur compounds from hydrocarbon material after bringing into contact with said sulphided nickel adsorbent.

EFFECT: increased capacity of adsorbent to a value, comparable for sulphides and mercaptans.

11 cl, 3 ex

FIELD: oil and gas production.

SUBSTANCE: inventions relates to oil processing, particularly to methods of refining of gasoline fractions. Invention relates to method of selective treatment of gasoline fractions of catalytic cracking by means of its stepped hydro-refining at presence of alumo-oxide catalyst in medium of hydrogen at increased pressure and temperature with separation of product of the first stage for light and sinking fractions, with following hydro-refining of sinking fraction at second stage at temperature 280-340°C, pressure 2-3 MPa, volume velocity of raw material feeding 4-8 hour-1 and mixing of received product after the second stage of hydro-refining with light fraction of product of the first stage with receiving of cleaned product. Separation of product of the first stage or separation of initial gasoline for light and sinking fractions is implemented by temperature 70-90°C at processing of raw materials with content of sulfur higher than 0.16% wt, 90-120°C - at processing of raw materials with content of sulfur 0.005-0.16% wt.

EFFECT: declared methods provide for reduction of sulfur content up to level not more than 0,0010% wt in gasoline fraction at minimal reduction of content of olefinic hydrocarbons.

3 cl, 3 ex, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to promoter catalysts on a combined zeolite/aluminosilicate substrate with low content of macropores and to methods of hydrocracking/hydroconversion and hydrofining, in which said catalysts are used. The catalyst contains at least one hydrogenating-dehydrogenating element, selected from a group comprising group VIB and group VIII elements, a promoter element in a controlled amount, selected from phosphorus oxide, and a substrate based on zeolite Y, defined by constant a of the unit cell of the crystal lattice, ranging from 24.40·10-10 m to 24.15·10-10 m, and based on aluminosilicate, containing silicon dioxide (SiO2) in amount exceeding 5 wt % and less than or equal to 95 wt %. The catalyst has the following characteristics: average pore diametre, total pore volume, BET specific surface area, volume of pores of different diametre, characterised by X-ray diffraction pattern and packing degree of the catalyst.

EFFECT: catalyst provides for suitable selectivity of middle distillates, ie fractions with initial boiling point of at least 150°C and final boiling point which reaches initial boiling point of residue, for example below 340°C or 370°C.

28 cl, 4 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to removal of sulphur from hydrocarbon streams, to a composition which is suitable for use in desulphuration of streams of cracked petrol and diesel fuel, and a method of preparing the said composition. A method of preparing a composition for removing sulphur from hydrocarbon streams involving the following is described: (a) mixing: 1) a liquid, 2) first metal formate, 3) material containing silicon dioxide, 4) aluminium oxide and 5) second metal formate, to form a mixture of the said components; (b) drying the said mixture to form a dried mixture; (c) calcination of the dried mixture; and (d) reduction of the calcined mixture with a reducing agent under reduction conditions to form a composition which contains a low valency activator, (e) separation of the obtained composition, where the said calcined reduced mixture facilitates removal of sulphur from a stream of hydrocarbons under desulphuration conditions, and where the said liquid is ammonia, and the composition obtained using the method described above. A method of removing sulphur from a stream of hydrocarbons involving the following is described: (a) bringing the stream of hydrocarbons into contact with the composition obtained using the method described above in a desulphuration zone under conditions which facilitate formation of a desulphurated stream of hydrocarbons from the said sulphonated composition and formation of a separate desulphurated stream of hydrocarbons and a separate sulphonated composition; (c) regeneration of at least a portion of the said separate sulphonated composition in the regeneration zone to remove at least a portion of sulphur contained in it and/or on it and formation of a regenerated composition as a result, (d) reduction of the said regenerated composition in an activation zone to form a composition containing a low valency activator which facilitates removal of sulphur from the stream of hydrocarbons when it touches such a composition, and e) subsequent return of at least a portion of the said reduced composition to the said desulphuration zone. Cracked petrol and diesel fuel obtained using the method described above are described.

EFFECT: more stable removal of sulphur from streams of hydrocarbons during desulphuration.

26 cl, 8 tbl, 17 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalysis. Described is a catalyst for hydrofining diesel fractions, which contains molybdenum disulphide, cobalt, nickel or iron, pseudoboehmite γ-AlOOH, obtained from electroexplosive aluminium nitride, which contains as a modifying additive nanodiamonds with size of not more than 20 nm, with the following ratio of components, wt %: pseudoboehmite - 10, nanodiamonds - 20, cobalt, nickel or iron - 20-30, molybdenum disulphide - the balance.

EFFECT: high mechanical stability of the catalyst.

2 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to selective heterogeneous nickel catalysts for hydrogenation of unsaturated hydrocarbons and sulphur removal and methods for production and use thereof. Described is a selective heterogeneous catalyst containing nickel on a support which is a diatomite powder having the following physical properties: BET surface area 20-50 m2/g, particle size less than 10 mcm - no more than 15 wt %, greater than 71 mcm - no more than 40 wt %, 10-71 mcm - the balance, or crushed shale taurite, having the following physical properties: BET surface area 12-16 m2/g, particle size less than 10 mcm - no more than 40 wt %, or a mixture thereof in ratio of 50:50. The catalyst has the following composition, wt %: nickel 52.0-54.0, aluminium oxide 2.5-3.8, iron oxide 1.3-1.7, sodium oxide 0.5-1.5, calcium oxide 0.1-0.6, magnesium oxide 0.25-0.8, sulphide sulphur 0.1-0.5, silicon dioxide - the balance. Also described is a method of producing said catalyst by mixing a support with 5-6% aqueous nickel sulphate solution, adding to the obtained suspension 25-27% calcined soda solution until achieving molar ratio of calcined soda to nickel sulphate of 1.6-1.7:1.0, at medium pH 9.0, or in two steps: at the first step to molar ratio calcined soda to nickel sulphate of 0.8-0.9:1.0, at medium pH 6.0-7.0, at the second step to molar ratio calcined soda to nickel sulphate of 1.6-1.7:1.0, at medium pH 9.0-10.0. Further, the method includes steps of filtering, washing, drying and pelletising without steps of reducing with hydrogen and passivation with a nitrogen-air mixture. Before use, activation of the fresh catalyst or recovery of the catalyst after 1500-3000 hours of contact thereof with the material is carried out directly in the hydrogenation reactor in a current of circulating hydrogen at 230-500°C for 5-50 hours. Also described is a method of using said catalyst.

EFFECT: achieving high activity, selectivity and stability of hydrogenating unsaturated hydrocarbons and sulphur removal.

6 cl, 6 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: method consists in electrolytic sedimentation of zinc on foam-nickel and thermal processing in inert medium at temperature from 650 to 750°C for not more than 2 h.

EFFECT: method makes it possible to simplify preparation of skeletal catalyst, reduce time of thermal processing and create foam-nickel with developed porous surface.

3 dwg, 2 ex

Up!