Refining method of vitamin C

A refining method and vitamin technology, which is applied in the fields of medicine and chemical industry, can solve the problems of high purity, easy oxidation, complicated operation, etc., and achieve the effects of stable quality, reduced oxidation, and low oxygen content

Active Publication Date: 2014-04-16
SHANDONG TIANLI PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for refining vitamin C aiming at technical problems such as complicated operation, high energy consumption, difficulty in improving purity and easy oxidation in the existing vitamin C refining process

Method used

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  • Refining method of vitamin C
  • Refining method of vitamin C

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.8 tons of crude VC in 3.5m 3 Add 3 times the mass of purified water to the dissolution tank, and rapidly raise the temperature to 85°C under the condition of a stirring speed of 60 rpm to fully dissolve the crude VC, add 2% (W / W) medical powder activated carbon, and decolorize for 40 minutes. The decolorized vitamin C solution was filtered through a plate filter of 0.3m activated clay filter cake, 1 textile fiber sand core with a filtration precision of 2μm, 10 polypropylene filter membranes with a filtration precision of 0.3μm, and 15 filtration precision 0.1 Filter through a μm polypropylene filter. The filtrate obtained after the four-stage filtration is crystallized by segmental temperature control. First, the crystallizer is preheated with hot purified water, the accumulated water is drained, and the air in the crystallization tank is replaced with nitrogen gas. The temperature is lowered while feeding, and the first hour 80~45℃, 45~30℃ in the second hour,...

Embodiment 2

[0033] Weigh 1.5 tons of crude VC at 3.5m 3 Add purified water of the same quality to the dissolution tank, and rapidly raise the temperature to 80°C at a stirring speed of 75 rpm to fully dissolve the crude VC, add 3% (W / W) medical powder activated carbon, and decolorize for 20 minutes. The decolorized vitamin C solution was filtered through a plate filter of 0.5m activated clay filter cake, 2 textile fiber sand cores with a filtration precision of 3μm, 12 polypropylene filter membranes with a filtration precision of 0.3μm and 12 filtration precision 0.2 Filter through a μm polypropylene filter. The filtrate obtained after the four-stage filtration is crystallized by segmental temperature control. First, the crystallizer is preheated with hot purified water, the accumulated water is drained, and the air in the crystallization tank is replaced with nitrogen gas. The temperature is lowered while feeding, and the first hour 80~45℃, 45~30℃ in the second hour, 30~18℃ in the third...

Embodiment 3

[0038] Weigh 1.2 tons of crude VC in 3.5m 3 Add 2 times the mass of purified water to the dissolution tank, and rapidly raise the temperature to 60°C at a stirring speed of 120 rpm to fully dissolve the crude VC, add 5% (W / W) medical powdered activated carbon, and decolorize for 10 minutes. The decolorized vitamin C solution was filtered through a plate filter of 0.1m activated clay filter cake, 3 textile fiber sand cores with a filtration precision of 1μm, 15 polypropylene filter membranes with a filtration precision of 0.5μm and 10 filtration precisions of 0.3 Filter through a μm polypropylene filter. The filtrate obtained after the four-stage filtration is crystallized by segmental temperature control. First, the crystallizer is preheated with hot purified water, the accumulated water is drained, and the air in the crystallization tank is replaced with nitrogen gas. The temperature is lowered while feeding, and the first hour 80~45℃, 45~30℃ in the second hour, 30~18℃ in th...

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Abstract

The invention discloses a refining method of a vitamin C. The method comprises the steps of dissolving a vitamin C crude product in water and discoloring by using activated carbon, sequentially filtering the discolored vitamin C solution through a plate filter, a winding filter, a first micropore filter and a second micropore filter to reduce the impurity content, introducing the filtered vitamin C solution into a crystallization tank for segmented cooling crystallization, carrying out airtight filtration, washing and drying on the crystallized vitamin C solution, and screening the dried vitamin C particles to obtain refined vitamin C. The method disclosed by the invention is convenient in operation, low in energy consumption and good in discoloring effect and has the advantages of reducing the light absorption value of the finished vitamin C, improving the purity of the finished product and shortening the refining time; the obtained refined vitamin C is stable in quality; the purity of the finished product can be up to 99.9%; the product yield can be up to 99.5%, the baking extinction value is less than or equal to 0.02; and the impurity degree is less than or equal to 8 in each 3g.

Description

technical field [0001] The invention relates to a vitamin C refining method, in particular to a vitamin C production technology of four-stage filtration, segmented temperature-controlled crystallization and airtight three-in-one (filtration, washing, drying) treatment, which belongs to the technical fields of chemical industry and medicine. Background technique [0002] Vitamin C (Ascorbic Acid): Vitaminc (Ascorbic Acid); Vitaminumc; L-2,3,5,6-Tetrahydroxy-2-hexeno-gamma-lactone. [0003] [0004] VC is an indispensable substance to maintain human health. It is a catalyst for the oxidation-reduction reaction of living cells, participates in various metabolisms in the body, and has the physiological effect of promoting various rapid synthesis in the body. The lack of vitamin C in the body is prone to scurvy, which can cause death in severe cases. VC can prevent scurvy, promote body metabolism, enhance anti-infection ability, prevent the production of carcinogens, can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/62
Inventor 王乔隆付吉明张全景
Owner SHANDONG TIANLI PHARMA
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