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Method for extracting Vitamin C and gulonic acid from Vitamin C mother liquor

A vitamin and coronic acid technology, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of three-waste pollution, inability to recrystallize, etc., and achieve the effects of high resin utilization, low production cost, and improved product quality.

Inactive Publication Date: 2006-02-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are following problems in the present technology: calculate with my country's production of 70,000 tons of vitamin C / year, then produce 18 tons of vitamin C mother liquor (wherein containing 25% gulong acid, 10% Vc, 18% sugar) every day, because in mother liquor The components interfere with each other and cannot recrystallize
Therefore, the current industrial treatment method is to directly discharge it as waste, or to provide small factories with a large amount of concentrated sulfuric acid for oxidation to produce low-value oxalic acid (2000 yuan / ton), and produce greater pollution of the three wastes

Method used

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  • Method for extracting Vitamin C and gulonic acid from Vitamin C mother liquor
  • Method for extracting Vitamin C and gulonic acid from Vitamin C mother liquor

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preparation example Construction

[0033] In the preparation method of the resin of the present invention, the reaction conditions of the suspension polymerization may be well-known suspension reaction conditions in the art. In a preferred example of the present invention, the reaction temperature of the suspension reaction is 60-110°C, preferably 75-90°C, the pressure is normal pressure, and the reaction time is 4-10 hours, preferably 6 to 7 hours.

[0034] 2. Acidic cationic functionalization of resin matrix

[0035] The gel or macroporous reticular cross-linked interpolymer containing acrylic acid group and / or methacrylic acid group synthesized by the present invention can be obtained by hydrolysis only due to its own acidic functional group. Suitable type of weakly acidic cationic resin.

[0036] The gel or macroporous network cross-linked interpolymer containing acrylate groups and / or methacrylate groups synthesized by the present invention needs to be hydrolyzed by a NaOH solution with a concentration o...

Embodiment

[0052] In the simulated moving bed operating system composed of eight 40mm×1200mm chromatographic columns connected in series, the macroporous acidic cationic resin synthesized by 30% styrene monomer and 70% methacrylate-based monomer is filled. The liquid is vitamin C mother liquor, wherein the concentration of vitamin C is about 18.5%, and the concentration of gulong acid is about 39%. The mother liquor is passed through a simulated moving bed. The operating conditions of the simulated moving bed are as follows: separation temperature 75°C, system pressure 1.1Mpa, feed The feed rate is 1L / h, the elution water feed rate is 3.5L / h, and the feed reaches equilibrium after 24 hours. The output obtained is as follows:

[0053] 1) Vitamin C part: the concentration of vitamin C is about 12.7%, the purity of vitamin C is 94.8%, and the concentration of gulong acid is 4.6% (the volume is 1.5 times of the mother liquor of vitamin C fed).

[0054] 2) Gulonic acid concentration: the con...

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Abstract

The method to extract vitamin C and Gulonic acid from vitamin C mother liquor comprises, using the said mother liquor as material to separate the vitamin C and Gulonic acid completely on analog moving bed with water as eluant at 20~75Deg, and obtaining the said constituents. This invention uses common condensing crystallization separation method.

Description

technical field [0001] The invention relates to a method for extracting vitamin C and gulong acid from vitamin C mother liquor, in detail, it relates to the technology of cleverly utilizing special resin and simulated moving bed chromatography to separate and prepare vitamin C and gulong acid products from vitamin C mother liquor. Background technique [0002] Vitamin C is currently the world's largest production and sales, the most widely used vitamin products. At present, the output of vitamin C in the world is about 100,000 tons per year, and the global market sales are 500 million US dollars. In 2003, my country's vitamin C export volume was 54,000 tons. In 2003, the global production and sales volume was 90,000 tons. my country's vitamin C export volume accounted for 60% of the world market. But there are following problems in the present technology: calculate with my country's production of 70,000 tons of vitamin C / year, then produce 18 tons of vitamin C mother liquor...

Claims

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Application Information

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IPC IPC(8): C07D307/62C07C59/215C07C51/47
Inventor 彭奇均
Owner JIANGNAN UNIV
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