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30 results about "Mineral ascorbates" patented technology

Mineral ascorbates are a group of salts of ascorbic acid (vitamin C). They are composed of a mineral cation bonded to ascorbate (the anion of ascorbic acid).

Preparation method of vitamin C fatty acid diester

The invention provides vitamin C aliphatic acid diester and a preparation method thereof and relates to L-ascorbic acid diester and a preparation method thereof. According to the vitamin C aliphatic acid diester, the problems that vitamin C monoester is difficulty compatible with medicines, and vitamin C tetraester is weak in oxidation resistance are solved. The structural formula of the vitamin C aliphatic acid diester is shown in the specification. The preparation method of the vitamin C aliphatic acid diester comprises the following steps: after vitamin C is mixed with ethyl acetate, adding pyridine and a phase transfer catalyst, dropwise adding fatty acyl chloride into a reaction system, maintaining the dropwise adding speed until the dropwise adding is finished, continuing to react to separate a water layer and an oil layer, washing with water, and evaporating to separate ethyl acetate, so as to obtain a colorless oily vitamin C aliphatic acid diester crude product; and (2) dissolving the colorless oily vitamin C aliphatic acid diester crude product by virtue of a methanol-water mixed solvent, cooling to separate a methanol layer and a product layer, and removing methanol and ethyl acetate, so as to obtain a pure product, namely the vitamin C aliphatic acid diester. According to the preparation method, the compatibility and the oxidation resistance of the vitamin C aliphatic acid diester are obviously enhanced, and the purity of the product is improved. The preparation method is used for preparing the vitamin C aliphatic acid diester.
Owner:东方红西洋参药业(通化)股份有限公司
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