A kind of production method of l (+) tartaric acid

A production method, tartaric acid technology, applied in carboxylate preparation, organic chemistry, etc., can solve problems such as environmental pollution, low yield, and unfriendly environment, so as to reduce environmental pollution, increase product yield, and solve environmental pollution Effect

Active Publication Date: 2015-12-16
CHANGMAO BIOCHEMICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology adopts the calcification of calcium chloride aqueous solution to produce a large amount of calcified mother liquor waste water to pollute the environment, and at the same time, the calcified mother liquor waste contains a small amount of product L(+) calcium tartrate and incompletely reacted cis-epoxysodium sodium succinate,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of production method of L (+) tartaric acid, is made up of following steps:

[0014] (1) According to the mass ratio of 10:90, cis-epoxysodium hydrogen succinate is added to water to make a mixed solution, adjust the pH to 8 with sodium hydroxide, and add 1.0% Rhodococcus rubrum of the mixed solution quality (Rhodococcusruber), hydrolyzed to generate L(+) sodium tartrate aqueous solution;

[0015] (2) adding calcium sulfate calcification to the L(+) sodium tartrate aqueous solution, filtering to obtain the L(+) calcium tartrate solid and filtrate calcification mother liquor, washing the L(+) calcium tartrate solid with water; freezing the calcification mother liquor to 3° C., centrifuged to obtain sodium sulfate decahydrate solid and frozen mother liquor, and the frozen mother liquor is reused in the step (1);

[0016] (3) acidolyze the L(+) calcium tartrate solid with sulfuric acid, filter and wash to obtain calcium sulfate solid and L(+) tartaric acid aqueous ...

Embodiment 2

[0018] A kind of production method of L (+) tartaric acid, is made up of following steps:

[0019] (1) According to the mass ratio of 10:90, add cis-epoxysodium hydrogen succinate to 50% of the aqueous solution of frozen mother liquor obtained in the last production to make a mixed solution, adjust the pH to 7 with sodium hydroxide, add 1.0% Rhodococcus ruber (Rhodococcus ruber) of described mixed solution quality, hydrolysis generates L (+) sodium tartrate aqueous solution;

[0020] (2) adding calcium sulfate calcification to the L(+) sodium tartrate aqueous solution, filtering to obtain the L(+) calcium tartrate solid and filtrate calcification mother liquor, washing the L(+) calcium tartrate solid with water; freezing the calcification mother liquor to 3° C., centrifuged to obtain sodium sulfate decahydrate solid and frozen mother liquor, and the frozen mother liquor is reused in the step (1);

[0021] (3) acidolyze the L(+) calcium tartrate solid with sulfuric acid, filte...

Embodiment 3

[0023] A kind of production method of L (+) tartaric acid, is made up of following steps:

[0024] (1) According to the mass ratio of 5: 95, cis-epoxysodium hydrogen succinate is added to the aqueous solution of the frozen mother liquor obtained by the last production of 100% mass concentration to make a mixed solution, and the pH is adjusted with sodium hydroxide 6, adding 5.0% of the mixed solution quality Rhodococcus ruber (Rhodococcus ruber), hydrolyzed to generate L (+) sodium tartrate aqueous solution;

[0025] (2) adding calcium sulfate calcification to the L(+) sodium tartrate aqueous solution, filtering to obtain the L(+) calcium tartrate solid and filtrate calcification mother liquor, washing the L(+) calcium tartrate solid with water; freezing the calcification mother liquor to 0° C., centrifuged to obtain sodium sulfate decahydrate solid and frozen mother liquor, and the frozen mother liquor is reused in the step (1);

[0026] (3) acidolyze the L(+) calcium tartra...

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PUM

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Abstract

The invention discloses a method for producing an L (+) tartaric acid. The method for producing the L(+) tartaric acid comprises the following steps of: (1) adding cis-epoxy sodium bisuccinate into aqueous solution of frozen mother solution to prepare mixed solution, adjusting the pH value, and adding red rhodococcus to hydrolyze; (2) adding calcium sulfate to perform calcification, filtering to obtain L(+) calcium tartrate solid and calcified mother solution, freezing the calcified mother solution, performing centrifugal separation to obtain sodium sulfate decahydrate solid and frozen mother solution, and returning the frozen mother solution to the step (1); and (3) performing acidolysis on the L(+) calcium tartrate solid by using sulfuric acid, filtering to obtain aqueous solution of the L(+) tartaric acid, passing through cation and anion exchange resins sequentially, concentrating, crystallizing, separating and drying to obtain the L(+) tartaric acid. The calcified mother solution and calcium sulfate generated in the production process can be recycled, so the problem of environmental pollution is solved; and a small amount of product L(+) calcium tartrate dissolved in the calcified mother solution and unreacted cis-epoxy sodium bisuccinate are recovered, so the product yield is increased.

Description

technical field [0001] The invention relates to a production method of L(+) tartaric acid, which belongs to the technical field of biochemical industry. Background technique [0002] L(+)-tartaric acid is a natural organic acid, which has a high content in grapes. L(+)-tartaric acid can be used as one of the additives, flavor enhancers, and food coloring components of papaya. It is also an important raw material for primary industries. Many insoluble drugs can be processed into tartrate salts with excellent water solubility. In addition, it It is also widely used in cosmetics, wine making, construction, electroplating, leather making and other industries. In the early days, L(+)-tartaric acid was mainly extracted from tartar, a by-product of wine. Due to the limitation of raw materials, the output could not meet the demand. In recent years, the main production technology of L(+)-tartaric acid is to use microorganisms with cis-epoxysuccinate hydrolase to produce through enz...

Claims

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Application Information

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IPC IPC(8): C07C59/255C07C51/02
Inventor 万屹东蒋志清顾松林陆瑾琏周斌芮新生
Owner CHANGMAO BIOCHEMICAL ENG CO LTD
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