Production method of gulonic acid in production of vitamin C

A production method and technology of gulonic acid, which are applied in the separation/purification of carboxylic acid compounds, organic chemistry and other directions, can solve the problems of serious environmental pollution, affecting the quality of resin exchange equivalent gulonic acid, consumption of large tap water, etc., to simplify the process, The effect of avoiding waste liquid recovery and treatment problems and saving the cost of use

Inactive Publication Date: 2010-02-10
XIAMEN STARMEM TECH
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Problems solved by technology

[0006] This method avoids the energy consumption and loss caused by heating and sedimentation, but still has the following disadvantages: after chemical coagulation, there is still a certain amount of soluble protein in the supernatant, which will gradually precipitate with the change of the pH value of the solution, affecting The exchange equivalent of resin and the quality of gulong acid
This step needs to consume a large amount of tap water and discharge waste acid and alkali, which seriously pollutes the environment.

Method used

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  • Production method of gulonic acid in production of vitamin C
  • Production method of gulonic acid in production of vitamin C

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Experimental program
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Embodiment Construction

[0033] Describe in detail below in conjunction with accompanying drawing and embodiment:

[0034] figure 1 For the purpose of the present invention, the fermented liquid containing gulon acid sodium salt is first filtered through a ceramic membrane with a pore size of 20 to 50 nm, and the filtrate is converted into a guron acid solution through a bipolar membrane electrodialysis system, and the guron acid solution is concentrated by nanofiltration to obtain a nanofiltration concentrate . The concentrated solution can be used for crystallization to make gulong acid crystals.

[0035] The specific operation process is as follows:

[0036] 1. Ceramic membrane filtration experiment

[0037] The feed liquid used is gulong acid fermentation liquid, the ceramic membrane pore size is 20-50nm, the temperature is 30-38°C, and the pressure is 0.15-0.5Mpa. A total of 3 batches of experiments have been carried out.

[0038] The specific results are shown in Table 1:

[0039] ...

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Abstract

The invention provides a production method of gulonic acid in the production of vitamin C, which comprises the following steps: (1) ceramic film filtering: filtering and concentrating a fermentation broth through a ceramic-film filtering apparatus, and removing proteins, hypha, suspended substances, colloid, bacteria and other macromolecular organic substances in filter residues to obtain a gulconic sodium dialysate; (2) double-pole film electrodialysis system: processing the filtrate containing gulconic sodium salts by an electrodialysis system to as to convert the gulconic sodium into the gulconic acid solution; (3) nanofiltration concentration: concentrating the gulconic acid solution in a nanofiltration film apparatus to obtain the concentrated gulconic acid solution. The method can reduce the production cost, increase the total yield, enhance the product quality and achieve the aims of environmental protection and simple apparatus operation.

Description

technical field [0001] The invention relates to a production method of gullonic acid, in particular to a production method of combining ceramic membrane filtration, bipolar membrane electrodialysis system and nanofiltration for the extraction of gulong acid used in vitamin C production. Background technique [0002] The development process and development trend of the production reaction method of vitamin C have undergone great changes in decades of technological development. At present, the main production methods of vitamin C are the Layle method and the two-step fermentation method. The Leyle method needs to carry out ketal reaction to protect other hydrocarbon groups, so the reaction steps are increased, and toxic and strong corrosive media such as acetone and concentrated sulfuric acid are introduced in the process, which is inconvenient to operate and increases the equipment cost. At present, two-step fermentation methods are mostly used. The production of vitamin C b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/105C07C51/42
Inventor 李振峰罗萍孙洪贵陈洪景虞美辉林志华卢伯福雷细良
Owner XIAMEN STARMEM TECH
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