Alcohol production waste processing method (options)

FIELD: alcohol production.

SUBSTANCE: method comprises direct distillation of concentrate of top ethyl alcohol impurities or rectification of intermediate ethyl alcohol fraction in presence of an alkali agent selected from sodium and potassium oxide, carbonate, and bicarbonate hydrates, and aqueous ammonia in case of top ethyl alcohol impurities processing and selected from sodium and potassium oxide, carbonate, and bicarbonate hydrates, calcium oxide, and aqueous ammonia in case of intermediate ethyl alcohol fraction rectification at alkali agent concentration 0.01 to 3.0 wt % and vat temperature 80-86°C. Desired processing product is commonly used as a binary mixture component and vat residue obtained in distillation and rectification operation is commonly used as additional component of fuel oil.

EFFECT: achieved wasteless processing of alcohol production wastes and utilization of all processing products.

6 cl

 

The invention relates to the field of chemical technologies, and in particular to methods of processing waste in alcohol production.

Separation of a mixture of aliphatic alcohols, there are many patents. In particular the allocation of ethyl alcohol of various compounds by hydrogenation with hydrogen (A.S. Czechoslovakia 268100, MKI C 07 C 29/04, 31.07.1990) or in the form of a mixture with toluene (A.S. USSR 1620442, MKI 07 With 31/10, 15.01.1991). These methods are cumbersome and not suitable for separation of KGP and PFAS.

We have patent No. 2109722 "allocation Method aliphatic alcohols" (application No. 96110443 from 23.05.1996 year), but it concerns the allocation of aliphatic alcohols from the head (afuraldehyde) fractions of ethanol production.

There is also patent No. 21836616, 20.06.2002 "Method of processing the parent ethanol fraction and concentrate the head of the faction" (application No. 2001109844 16.04.2001) is taken as a prototype. The method is carried out by direct distillation head of fraction of ethyl alcohol and concentrate the head of fraction of ethyl alcohol in the presence of alkaline reagents, which are used hydrates, oxides, carbonates and bicarbonates of sodium and potassium, of calcium oxide, ammonia water with the concentration of the alkaline agent is from 0.01 to 3.0 wt.%. The method is conducted at temperatures cube 81-92°C. VAT residue obtained during the distillation, is used as an additive in the fuel oil.

The product of the ω distillation this method is a component of a binary mixture of the following composition: water - 7-9 wt.%, methanol - 0.1 to 0.6 wt.%, acetaldehyde - 0.1 to 0.5 wt.%, the ethyl acetate - 0.1 to 1.0 wt.%, propanol and 0.5 to 3.0 wt.%, ethanol - 86-92 wt.%. The binary mixture used in the manufacture of solvents, nitrovarnishes of the film.

The way the prototype concerns the processing of the parent ethanol fraction. concentrate the head of fraction of ethyl alcohol, which composition is different from concentrate head of impurities and intermediate fractions of ethyl alcohol. Concentrate head of impurities ethyl alcohol (TU 9182-478-00008064-2002) and the intermediate fraction of ethyl alcohol (THE 9182-479-00008064-2002) are new waste alcohol production.

Concentrate head of impurities ethyl alcohol (CAS) is obtained when processing the parent ethanol fraction in the EAST 10-217-98 (EAP(g) centrally on special plants or processing in the system bragorektifikatsii and rectification directly to ethanol plants to increase the output of the distillation of alcohol. Besides concentrate head of impurities ethyl alcohol, is obtained and the intermediate fraction of ethyl alcohol.

Concentrate head of impurities ethyl alcohol (CAS) according to THE 9182-478-00008064-2002 contains, wt%:

ethanol70-88
aldehydes, not less than0,5
esters, not less than3,0
methanol, not less than2,0
restwater to 100

The intermediate fraction of ethyl alcohol (PFAS) in accordance with THE 9182-479-00008064-2002 contains, wt%:

water23-73
ethanol25-75
the percentage of total impurities
(propanol, Isobutanol, isoamyl alcohol),
not less than2

The aim of the invention is a non-waste recycling new waste alcohol production using all products.

This objective is achieved in that in the first embodiment proposes a method of processing waste alcohol production by straight distillation of the concentrate head admixture of ethanol in the presence of an alkaline agent selected from the hydrate oxides, carbonates and bicarbonates of sodium and potassium, ammonia water, at a concentration of alkaline agent is from 0.01 to 3.0 wt.% and the temperature of the cube 80-86°C. Target product is used as a component of a binary mixture, the VAT residue obtained during the distillation, is used as an additive in the fuel oil. Temperature di is the range 80-86° With corresponds to the boiling temperature of the components of the concentrate head of impurities and semi ethanol: below 80°is incomplete distillation of ethanol, butanol, Isobutanol, propanol contained in the original mass, and at temperatures above 86°povyshaetsja the water content in the finished product, which should be no more than 9% by weight. Direct distillation of the MSE is designed to remove impurities (water, salts and acids) by pre-treatment with an alkaline agent, and further use of the obtained distillate in the production of a binary mixture.

Processing KGP

From the storage of raw materials in the reactor pump is pumped 700-900 l KGP, the mixer is turned on and a trapdoor loads calculated amount of alkali (from 0.1 to 1.5 kg 900 l of raw materials). When this alkaline agent binds in raw acid and esters in salt, which in the refining process remain as residue. After the addition of alkali, make the shutter speed 20-30 minutes to complete the reaction, then the coil of the reactor serves the heating medium (steam or hot water) and the contents heated to a temperature 80-86°C. At this temperature, the evaporation of volatile components (aliphatic alcohols, ethers, aldehydes and esters), which pairs come to the reflux condenser, condensed by cooling with river water and when the temperature 20-40° To merge into the receiver toluene, where it is mixed with there toluene, and then, as it accumulates, is pumped into a storage of the finished product.

As distillation in the reactor is reduced content of volatile components, and increases the content of water and salts, and once the level in the apparatus will be below the level of the stirrer, distillation ceases. While distilled 97-99% original faction concentrate head of impurities. VAT residue is pumped into the collection and from the collection of the accumulation is added to the oil.

Product processing KGP is a component of a binary mixture of the following composition: water - 7-9 wt.%, methanol - 0.1 to 0.6 wt.%, acetaldehyde - 0.1 to 0.5 wt.%, the ethyl acetate - 0.1 to 1.0 wt.%, propanol and 0.5 to 3.0 wt.%, ethanol - 86-92 wt.%, and an acid number of not more than 0.06 mg KOH/l In their properties obtained target product similar to the product of the processing head of fraction of ethyl alcohol.

Waste from processing MSE is vodopyanovy solution containing aliphatic alcohols (ethyl, butyl, isobutyl, isoamyl) and dissolved salts of sodium acetate. Waste is added to the residual oil and improve its quality (fluidity, energy).

The second option proposes a method of processing waste alcohol production by rectification of the intermediate fraction atrovaginata in the presence of an alkaline agent, selected from the hydrates, oxides, carbonates and bicarbonates of sodium and potassium, of calcium oxide, ammonia water, at a concentration of alkaline agent is from 0.01 to 3.0 wt.% and the temperature of the cube 80-86°C. Target product is used as a component of a binary mixture, and the VAT residue - as an additive in the fuel oil.

Temperature range 80-86°corresponds to the boiling temperature of the components of the semi-product of ethanol: below 80°is incomplete distillation of ethanol, butanol, Isobutanol, propanol contained in the original mass, and at temperatures above 86°With increased water content in the finished product, which should be no more than 9% by mass.

Processing PFAS.

From the storage of raw materials in the reactor pump is pumped 700-900 l PFAS, is added to the estimated amount of the alkaline agent, for example sodium hydroxide, the mixer is turned on. Then in the coil of the reactor served the heating medium (steam or hot water) and the contents heated to a temperature 80-86°C. At this temperature, the evaporation of volatile components, which are flue mass transfer in rotary machines MPA-200, pass through them and into the reflux condenser. In the reflux condenser vapors are condensed and the temperature of 30-50°To fall on the divider phlegmy, which divides the flow phlegmy into two parts: one part is returned to in rhne the plate MPA-200 to strengthen vapor, another part of phlegmy in the form of distillate output as the parent faction and into the collector where it is mixed with there toluene.

Reflux the number is set so that the distillate water content did not exceed 9 wt.%, the concentration of total alcohols (spirometry) was not less than 94%. At lower concentrations reflux number increases from 4 to 8. Thus processed 50-60 wt.% semi ethyl alcohol.

As distillation in the reactor is reduced content of volatile components and increases the amount of water and salts. After total concentration of alcohol in the distillate will be less than 94%, the Stripping-off and VAT residue is pumped into the collection and the accumulation is added to the oil.

Product processing PFAS is a component of a binary mixture of the composition: water - 7-9 wt.%, methanol - 0.1 to 0.6 wt.%, acetaldehyde - 0.1 to 0.5 wt.%, the ethyl acetate - 0.1 to 1.0 wt.%, propanol and 0.5 to 3.0 wt.%, ethanol - 86-92 wt.%, and an acid number of not more than 0.06 mg KOH/l In their properties obtained target product similar to the product of the processing head of fraction of ethyl alcohol and concentrate head of impurities ethyl alcohol.

Waste from processing PFAS is vodopyanovy solution containing aliphatic alcohols (ethyl, butyl, isobutyl, isoamyl) and rest is enhanced in salt water sodium acetate. Waste is added to the residual oil and improve its quality (fluidity, energy).

1. Method for processing waste alcohol production by straight distillation of the concentrate head admixture of ethanol in the presence of an alkaline agent selected from the hydrate oxides, carbonates and bicarbonates of sodium and potassium, ammonia water, at a concentration of alkaline agent is from 0.01 to 3.0 wt.% and the temperature of the cube 80-86°C.

2. The method according to claim 1, characterized in that the target product processing is used as a component of a binary mixture.

3. The method according to claim 1, characterized in that the VAT residue obtained during the distillation, is used as an additive in the fuel oil.

4. Method for processing waste alcohol production by rectification of the intermediate fraction of ethanol in the presence of an alkaline agent selected from the hydrate oxides, carbonates and bicarbonates of sodium and potassium, of calcium oxide, ammonia water, at a concentration of alkaline agent is from 0.01 to 3.0 wt.% and the temperature of the cube 80-86°C.

5. The method according to claim 4, characterized in that the target product processing is used as a component of a binary mixture.

6. The method according to claim 4, characterized in that the VAT residue obtained during the distillation, is used as an additive in the fuel oil.



 

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