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Method for decolorizing vitamin C sodium solution

A treatment method and decolorization technology, applied in the direction of organic chemistry, can solve the problems of difficult regeneration of activated carbon, pollute the environment, and high cost, and achieve the effects of high purity, shortened process route, and reduced cost

Inactive Publication Date: 2017-06-13
安徽泰格生物技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Decolorization with activated carbon is easy to generate dust, and the regeneration of activated carbon is very difficult, its cost is relatively high, it will pollute the surrounding environment, and it is also very wasteful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The decolorization treatment method (1) of embodiment 1 vitamin C sodium solution

[0032] Take 2.0g of D208 resin and fill it into an exchange column, soak it with 15ml of absolute ethanol for 15h. Then wash with 15ml of deionized water twice until the pH is neutral, and then soak for 4h with 2 times the resin volume of sodium hydroxide (0.1mol / L) solution. Then wash with 100ml of deionized water for 4 times until neutral, soak with 2 times the resin volume of HCl (0.1mol / L) solution for 4h, wash with 100ml of deionized water for 4 times until the pH is neutral, collect the resin by filtration and dry it for decolorization Handle spare. Measure 70ml of the crude vitamin C sodium solution that has been filtered and removed in a 250ml conical flask, then weigh 1.0g of the dried resin and add it to the conical flask, shake for 5h at a water bath temperature of 25°C, the frequency of oscillation (100 times / min). After the vibration is finished, the resin is filtered out...

Embodiment 2

[0033] The decolorization treatment method (2) of embodiment 2 vitamin C sodium solution

[0034] Take 2.0g of D208 resin and fill it into an exchange column, soak it with 15ml of absolute ethanol for 16h. Then wash with 10ml of deionized water twice until the pH is 7, and then soak for 5h with 2.5 times the resin volume of sodium hydroxide (0.15mol / L) solution. Then wash with 75ml of deionized water for 2 times and the pH is 7, soak with 2.5 times the resin volume HCl (0.15mol / L) solution for 5h, wash with 75ml of deionized water for 2 times and the pH is 7, collect the resin by filtration and dry it for decolorization Handle spare. Measure 75ml of the crude sodium vitamin C solution filtered to remove impurities in a 250ml Erlenmeyer flask, then weigh 1.0g of the dried resin and add it, shake at a water bath temperature of 30°C for 5h, and the frequency of oscillation (100 times / min), after the vibration is over, filter out the resin with filter paper, and then recrystall...

Embodiment 3

[0035] The decolorization treatment method (3) of embodiment 3 vitamin C sodium solution

[0036] Change the crude product sodium vitamin C solution in Example 1 to 80ml, change the shaking time to 4h, and the rest are the same as in the implementation case 1. The detection data of the finished product sodium vitamin C reaches the requirements of food grade sodium vitamin C, and the resin after use is passed through The treatment can also be used again without affecting the quality of the product. The purity of the obtained sodium vitamin C is 99%, the content of needle crystals is above 98%, and the optical rotation of the finished product is 101°.

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PUM

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Abstract

The invention provides a method for decolorizing a vitamin C sodium solution and belongs to the field of chemical industry. The method comprises the following steps: directly preparing a vitamin C sodium crude product acquired according to a Vc production alkali conversion process into an aqueous solution; absorbing and decolorizing by utilizing a styrene D208 resin containing a pyridine group; concentrating, crystallizing, separating and drying a decolorized solution, thereby acquiring a high-quality food-grade vitamin C sodium product. The invention has the advantages of reduced intermediate link, shortened process route and lowered production cost and is more beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to a method for decolorizing sodium vitamin C solution. Background technique [0002] Sodium vitamin C is also called sodium L-ascorbate. Its anti-corrosion and anti-oxidation effect is much higher than that of vitamin C. However, the price is often only half of that of vitamin C. It is widely used in food preservatives, medicines and cosmetics. In chemical production, decolorization is a very important process, so the decolorization process technology determines the quality of the product. In the current actual production, if one wants to produce vitamin C sodium with good quality, vitamin C must be produced first. However, to produce vitamin C, crude vitamin C must first be produced. The process of this method is relatively long, and It takes a long time, and the production cost is high, which is not conducive to industrialized production, and needs further improvement. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/62
CPCC07D307/62
Inventor 吴勇权沈连杰
Owner 安徽泰格生物技术股份有限公司
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