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Biological refining production of ethyl lactate and technological process for common product thereof

A technology of ethyl lactate and a process method, which is applied in the field of biorefining to produce ethyl lactate, can solve problems such as environmental pollution, many by-products, and equipment corrosion, and achieve the effects of no environmental pollution, short process routes, and no corrosion of equipment

Inactive Publication Date: 2006-03-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process mainly has the following problems: many by-products, serious equipment corrosion, and high production costs
However, the main component of the fermented liquid with calcium carbonate as a neutralizer is crude calcium lactate, which needs to be hydrolyzed with concentrated sulfuric acid to obtain crude lactic acid and by-product calcium sulfate. Calcium sulfate is difficult to be further utilized, and a large amount of calcium sulfate will accumulate. Cause environmental pollution, so the development and production of lactic acid, ethyl lactate new technology is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Use LB bacteria as cells, use ammonia as neutralizing agent to ferment to produce ammonium lactate, control the pH of the fermentation broth to 5.5; add 400ml of glucose at a rate of 20ml / h at a temperature of 36°C and a concentration of 600g / L glucose, and the fermentation time is 80h.

[0012] 0.1mol.L -1 Phosphoric acid and 0.1mol.L -1 Ammonium lactate reacts, when the pH value of the solution is below 3.88, generates (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid, which are then obtained by separation (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid for backup.

[0013] Ethyl lactate is synthesized from lactic acid and ethanol by catalytic distillation. The packing of the catalytic rectification tower is packed in three sections, the rectification section and the stripping section are directly filled with θ mesh ring packing; the catalytic rectification section is filled with catalyst-wrapped packing. Catalyst consumption is 5% of lactic acid quality, ...

example 2

[0015] Use LB bacteria as cells, use ammonia as a neutralizing agent to ferment to produce ammonium lactate, control the pH of the fermentation broth to 6.0; add 450ml of glucose at a rate of 25ml / h at a temperature of 37°C and a concentration of 700g / L glucose, and the fermentation time is 85h.

[0016] 0.1mol.L -1 Phosphoric acid and 0.1mol.L -1 Ammonium lactate reacts, when the pH value of the solution is below 3.88, generates (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid, which are then obtained by separation (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid for backup.

[0017] Ethyl lactate is synthesized from lactic acid and ethanol by catalytic distillation. The packing of the catalytic rectification tower is packed in three sections, the rectification section and the stripping section are directly filled with θ mesh ring packing; the catalytic rectification section is filled with packing wrapped with magnetic ultrafine solid superacid as catalyst. Cataly...

example 3

[0019] Use LB bacteria as cells, use ammonia as neutralizer to ferment to produce ammonium lactate, control the pH of the fermentation broth to 6.5; add 500ml of glucose at a rate of 30ml / h at a temperature of 35°C and a concentration of 500g / L glucose, and the fermentation time is 90h.

[0020] 0.1mol.L -1 Phosphoric acid and 0.1mol.L -1 Ammonium lactate reacts, when the pH value of the solution is below 3.88, generates (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid, which are then obtained by separation (NH 4 ) 2 HPO 4 , NH 4 h 2 PO 4 and lactic acid for backup.

[0021] Ethyl lactate is synthesized from lactic acid and ethanol by catalytic distillation. The packing of the catalytic rectification tower is packed in three sections, the rectification section and the stripping section are directly filled with θ mesh ring packing; the catalytic rectification section is filled with catalyst-wrapped packing. Catalyst consumption is 6% of lactic acid quality, and rea...

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PUM

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Abstract

This invention discloses a kind of method of producing ethyl lactate and co-product. Firstly, use lactic acid bacteria as thallus and ferment to make lactic acid ammonium. The fermentation condition is: use lactic acid bacteria as thallus, use ammonia as neutralization agent, the PH is 5.5-6.5, the temperature is 35-38íµ; The lactic acid ammonium reacts with phosphoric acid; in order to produce (NH4)2HPO4 and NH4H2PO4 only and not produce (NH4)3PO4, the PH of reaction solution should be kept under 3.88; finally, ethyl lactate is reacted and synthesized by catalyzed rectifying with lactic acid and ethanol.

Description

technical field [0001] The invention relates to a process method for producing ethyl lactate through biorefining, which belongs to the technology for producing ethyl lactate through biorefinery. Background technique [0002] Ethyl lactate is an important fine chemical raw material. Traditionally, it can be used as alcohol additive, lubricant for compressed pharmaceutical tablets, drug intermediate, etc. However, the most potential use of ethyl lactate is to use its non-toxic, good solubility, non-volatile, biodegradable, and fruity odor characteristics. As a "green solvent" with great development value and application prospects, it can replace Toxic solvents widely used in industry at present, such as: halogenated solvents, ethers, fluorochlorocarbon solvents, etc., are of great significance today when people's requirements for the environment are getting higher and higher. On the one hand, ammonium lactate can be directly used as a drug for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/56C07C69/68C07C67/08C12R1/01
Inventor 赵学明高静
Owner TIANJIN UNIV
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