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
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  • 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...

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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