Method of preparing vitamin E acetate

A technology for acetate and vitamin, applied in the field of preparation of vitamin E acetate, can solve problems such as difficulty in large-scale industrial production, difficult treatment of process waste liquid, corrosion of catalyst to equipment, etc., and achieves reactivity and product selectivity. The effect of improving, improving product quality, and stabilizing product vitamin E acetate
CN106565659AActive Publication Date: 2017-04-19WANHUA CHEM GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WANHUA CHEM GRP
Publication Date
2017-04-19

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Abstract

The invention provides a method of preparing vitamin E acetate. The method includes the steps of: feeding hydrogen halide gas as a catalyst, supporting a metal halide and elementary metal on a molecular sieve to obtain a cocatalyst and a stabilizing agent, and performing a reaction to 2,3,5-trimethylhydroquinone diester (TMHQ-DA) and iso-phytol (IPL) to produce the vitamin E acetate (VEA). The method has high catalyst activity and has low corrosion on equipment, wherein the raw material is converted into the vitamin E acetate directly through one step. The product has good stability and the method is easy to carry out in industrial enlarged production.
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Description

technical field

[0001] The invention relates to a preparation method of vitamin E acetate, which belongs to the field of fine chemical synthesis. Background technique

[0002] Vitamin E (Vitamin E) is a fat-soluble vitamin, and its hydrolyzed product is tocopherol, which is one of the most important antioxidants. Tocopherol can promote the secretion of sex hormones, increase the vitality and quantity of sperm in men; increase the concentration of estrogen in women, improve fertility, prevent miscarriage, and can also be used to prevent and treat male infertility, burns, frostbite, capillary bleeding, menopausal syndrome, Beauty and so on. Vitamin E acetate has broad application prospects and market value in medicine, food, cosmetics, feed and other fields.

[0003] German published patent document DE2000111402 discloses a method using zinc halide (Lewis acid) and aqueous protonic acid (Bronsted acid) as a catalyst, through the condensation of trimethylhydroquinone diester ...

Claims

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