Long carbon-chain dibasic acid prepared from fatty acids or derivatives thereof and preparation method for the long carbon-chain dibasic acid

Abstract

The invention discloses a biological preparation method of the long carbochain biatomic acid with the fatty acid or the ramification of the fatty acid as the starting material. The number of carbon atoms is between 9 and 20. The long carbochain biatomic acid with the total content of the biatomic acid no less than 95 percent and the content of the atomic acid no more than 0.5 percent is further refined; then the total content of the biatomic acid is no less than 98.5 percent and the content of the atomic acid is no more than 0.05 percent. The long carbochain biatomic acid can replace the current long carbochain biatomic acid produced in a chemical or biological method (with the alkanes as the raw material) to be used in each field. At the same time, the invention provides the preparation process of the long carbochain biatomic acid; the process begins from the fatty acid or the ramification of the fatty acid; first the bio-fermentation is used to produce the long carbochain biatomic acid; then after the special purification process, the required biatomic acid can be acquired.

Description

technical field [0001] The invention provides a long carbon chain dibasic acid product prepared from fatty acid or its derivatives, and a corresponding preparation method of the product. The dibasic acid prepared by this method can replace the long carbon chain dibasic acid prepared by the chemical method or the long carbon chain dibasic acid prepared from alkanes in large quantities at present, and can be used to produce special nylon, polycarbonate, powder Coatings, spices, hot-melt adhesives, special lubricants, etc., can be used as important raw materials for synthetic spices, engineering plastics, cold-resistant plasticizers, high-grade lubricants, polyamide hot-melt adhesives, and powder coatings. Background technique [0002] Long carbon chain dibasic acid (DCA) is the basic monomer raw material for a series of special synthetic materials. As a branch of dibasic acid, long carbon chain dibasic acid not only has the general properties of dibasic acid, but also has som...

AI Technical Summary

Problems solved by technology

Abroad, there are reports on using fatty acids as substrates to ferment and produce dibasic acids, but they all remain at the scale of shake flasks, and the level is relatively low. For example, U.S. Patent 4,965,201 reports using C8-C14 fatty acids as substrates to ferment and produce C8-C10 dibasic acids. Basic acids, the acid production level is only 10g / L, and cannot produce C11-C18 dibasic acids

For long carbon chain dibasic acids mainly used for polymerization (production of polyamide, polyester), if there is a trace amount of fatty acid (monobasic acid, containing only one functional group) in the product, it will seriously affect the polymerization process, resulting in The termination of the reaction seriously affects the quality of the product, and how to extract the dibasic acid finished product from the dibasic acid fermentation broth obtained by fermentation with fatty acids as a substrate. There are no reports of relevant literature and patents at home and abroad. The problems faced in extracting dibasic acid from the dibasic acid fermentation broth, there is no report at present