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

A technology of long carbon chain dibasic acid and fatty acid derivatives, applied in the field of preparation of the product, can solve the problems of staying, unable to produce dibasic acid, no finished product of dibasic acid, etc., to reduce dependence on petroleum raw materials and promote agriculture The process of industrialization and the effect of promoting development

Active Publication Date: 2008-02-13
CATHAY R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 (monob

Method used

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Examples

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preparation example Construction

[0022] The preparation method of the long carbon chain dibasic acid comprises biological fermentation steps and separation, extraction and refining steps, wherein the biological fermentation step is first to produce long carbon chain dibasic acids through biological fermentation of specific fatty acids or fatty acid derivatives, During the fermentation process, the concentration of fatty acids or fatty acid derivatives in the fermentation broth is controlled by feeding. After the fermentation, the bacteria are separated and removed, and the crude dibasic acid is separated by decolorization and acidification. At the same time, most of the residual fatty acids are separated and removed. The crude product is passed through an organic solvent. Crystallization, and finally a qualified long carbon chain dibasic acid product is obtained.

[0023] In the preparation method of long carbon chain dibasic acid of the present invention, it comprises the following steps:

[0024] 1) Convers...

preparation example 1

[0047] 30L tank fermentation technology with Lauric acid (lauric acid) as substrate

[0048] (1) Take the strain of glycerol tube, inoculate it into a 500mL seed bottle containing 200mL liquid medium, and culture it on a shaker at 35°C and 300rpm for 10-15 hours. %, glucose 1.0%, prepared from tap water, pH from.

[0049] (2) Take the above-mentioned shaking flask seeds, insert them into a 10 L stirring fermenter equipped with 5 L seed culture medium, and cultivate them at 35° C. for 24 hours. The composition of the seed medium is 0.5% of peptone, 0.5% of yeast extract, 20% of glucose, prepared from tap water, and the pH is natural.

[0050] (3) In a 30L fermenter equipped with 15L medium, respectively insert 1.5L of the above-mentioned seed solution to start fermentation. The fermentation medium of the fermenter is KH2PO4: 0.5%; yeast extract: 0.1%; urea: 0.15%; glucose: 1.5%; MgSO4·7H2O: 0.3%; Prepared with tap water, pH 6.0, sterilized at 121°C for 20 minutes. Dissoluti...

preparation example 2

[0052] Control the fermentation of myristic acid (myristic acid) according to the 30L tank fermentation technology of fermentation preparation example 1, formula is adjusted to KH PO : 0.5%; NaCl: 0.2%; Yeast extract: 0.2%; Urea: 0.3%; Glucose : 3.0%; (NH4)2SO4: 0.3%; MgSO4 7H2O: 0.1%; The weight conversion rate is 61%. Example 1 of the fermentation preparation of other dibasic acids with the same carbon chain length.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C07C55/02C07C57/13C12P7/44C12R1/74
Inventor 李乃强胡兵邱勇隽
Owner CATHAY R&D CENT CO LTD
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