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

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...