Mesoporous molecular sieve supported solid acid catalyst used for santene essential-oil isomerous esterification reaction

Abstract

The invention discloses a mesoporous molecular sieve supported solid acid catalyst used for santene essential-oil isomerous esterification reaction. Lauryl amine and polyoxyethylene octyl phenyl ether are taken as a mixed template; a sodium silicate solution is added, stirred, heated, aged, washed and filter-pressed, thereby acquiring a silicon raw material; the silicon raw material is mixed withbutyl titanate and solvent and then is thermally stirred and aged, thereby acquiring a solid powder mesoporous molecular sieve; the solid powder mesoporous molecular sieve is mixed and stirred with phosphotungstic acid, metatitanic acid and water; and after the mixture reacts, attapulgite is added and is uniformly stirred, dried and shaped after being pelleted, thereby acquiring the mesoporous molecular sieve supported solid acid catalyst. The mesoporous molecular sieve supported solid acid catalyst has the advantages that the uniformity of a cellular structure is high, the specific surface activity is high, the selectivity is excellent, the catalyst is easily separated from a product, the catalyst can be recycled and regenerated, the environment is protected, and the like. With the help of the mesoporous molecular sieve supported solid acid catalyst, the content and the yield of the product from the santene essential-oil isomerous esterification reaction are greatly promoted.

Description

technical field [0001] The invention relates to a mesoporous molecular sieve-supported solid acid catalyst used for the isomerization esterification reaction of terpene essential oil, belonging to the technical field of chemical industry and pharmacy. Background technique [0002] As we all know, borneol, camphor, a-feminyl alcohol and terpineol are important traditional Chinese medicine raw materials used in sanitary and preventive products, disinfectants, cardiovascular diseases, refreshing and high-grade fragrance raw materials. rising trend. At present, artificially synthesized borneol, camphor, α-fenitol and other products are all based on terpene essential oils such as α-pinene and β-pinene extracted from pine resin, or eucalyptus oil and other terpene essential oils. The raw material is obtained through the process of isomerization and esterification. Therefore, the selection and preparation of catalysts for the isomerization and esterification of terpene essential ...

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Problems solved by technology

(Appendix 8) The amount of catalyst used is about 20% (1.5g / 10ml). It is believed that the yield of chloroacetic acid is high, but the content of borneol is not marked, and there is no actual report on industrial production; Zhang Dongfeng, a postgraduate thesis of Central South University of Forestry and Technology in 2006, proposed The use of solid strong acid D4 as a catalyst but the synthesis of oxalate is only 48.8% (only 30% of the normal industrial yield, and the content of n-borneol is unknown)