A kind of method utilizing solvent distillation method to extract VC
A distillation method and a solvent technology, applied in the field of solvent distillation to extract Vc, can solve the problems such as complicated Vc process, Vc loss, etc., and achieve the effects of short process route, little environmental pollution, and simple operation.
Active Publication Date: 2021-03-30
ANHUI BBCA FERMENTATION TECH ENG RES
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AI Technical Summary
Problems solved by technology
Whether extracting Vc from the solution obtained by subsequent alkali conversion or acid conversion, there are disadvantages such as cumbersome process and serious loss of Vc.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Get 20% (mass percentage) Vc hydrochloric acid solution 200g, organic solvent 100g (wherein trioctyl ammonium 40g, octachar alcohol 10g, kerosene 50g) is put in the there-necked flask, carry out vacuum concentration at 35 ℃, carry out along with concentrating constantly, part Vc gradually crystallized out from the solution, and mixed with an organic solvent to obtain 143 g of crystal slurry liquid containing Vc. The crystal slurry liquid containing Vc was separated to obtain crude crystals of Vc, and the crude crystals of Vc were further purified and separated to obtain pure Vc. The resulting mother liquor is mixed with water to transfer Vc to the water phase to obtain an aqueous solution of Vc, which is further purified to obtain pure Vc.
[0023] After calculation, the yield of Vc is 92.5%.
[0024] After testing, the purity of the isolated Vc was 99.5%.
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Abstract
The invention relates to a method for extracting Vc by a solvent distillation process. The method comprises the following steps: 1) thoroughly mixing a Vc-containing crude solution with an organic solvent, and performing the solvent distillation process to remove moisture and / or volatile substances in the Vc solution in order to effectively transfer Vc molecules into an organic phase or crystallize Vc from the obtained mixed solution in a solid form and obtain a Vc-containing organic phase a Vc crystal or solid containing a small amount of impurities; and 2) extracting the Vc from the materialobtained in step 1). The method for extracting Vc by the solvent distillation process has the characteristics of short process route, simplicity in operation, high product purity, high extraction yield and small environmental pollution, and avoids complicated operation processes in the traditional Vc production technologies.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to a method for extracting Vc by solvent distillation. Background technique [0002] Vc, also known as L-ascorbic acid, is white crystal or crystalline powder, odorless, sour taste, melting point 190-192°C; easy to turn yellow after prolonged storage, soluble in water, slightly soluble in ethanol, insoluble in chloroform or ether. Vc has a wide range of uses. It is often used as a food additive or antioxidant. It is also widely used in medicine and clinical practice. It is useful in the treatment of scurvy, colds, cardiovascular defects, high cholesterol, diabetes, mental depression and other diseases. important use. [0003] The production method of Vc mainly adopts a two-step fermentation method, which replaces part of the chemical synthesis process of the Leyer route with a biological oxidation process, and then synthesizes vitamins. The two-step fermentation method uses D-sorb...
Claims
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IPC IPC(8): C07D307/62
CPCC07D307/62
Inventor 李荣杰潘声龙
Owner ANHUI BBCA FERMENTATION TECH ENG RES