2,2,4-trimethyl-1,3-pentanediol diisobutyrate esterification reaction catalyst, and preparation method and purpose thereof

Abstract

The invention belongs to the field of catalyst preparation, and particularly relates to a 2,2,4-trimethyl-1,3-pentanediol diisobutyrate esterification reaction catalyst, and a preparation method and a purpose thereof. NaHSO4 H2O-NaH2PO4, NaHSO4 H2O-KH2PO4, NaHSO4 H2O-NH4H2PO4, NaHSO4 H2O-CuSO4.5H2O and NaHSO4 H2O-Al2(SO4)3 18H2O are used as catalysts for catalyzing alcohol ester-12 and isobutyric acid to be subjected to esterification reaction for synthesizing 2,2,4-trimethyl-1,3-pentanediol diisobutyrate. The mixed inorganic salt catalytic reaction time is short; the conversion rate is high; the selectivity is high; the conversion rate of converting the alcohol ester-12 into the 2,2,4-trimethyl-1,3-pentanediol diisobutyrate is improved by 80 percent or higher.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a 2,2,4-trimethyl-1,3-pentanediol diisobutyrate esterification catalyst, a preparation method and application. Background technique [0002] Organic esters are widely used in organic synthesis industries such as solvents, plasticizers, resins, paints, fragrances, cosmetics, medicines, and surfactants. Esterification is an important part of chemical production, an important way to synthesize raw materials and intermediates, and the main source of many daily and production supplies. A liquid acid is generally used as a catalyst for the esterification reaction. As human beings have higher and higher requirements for the environment, traditional liquid acid catalysts have disadvantages such as easy to corrode equipment, produce a large amount of industrial wastewater, and cause serious damage to the environment. Liquid acid catalysts are used as dodecyl alcohol esters...

AI Technical Summary

Problems solved by technology

As human beings have higher and higher requirements for the environment, traditional liquid acid catalysts have disadvantages such as easy to corrode equipment, produce a large amount of industrial wastewater, and cause serious damage to the environment. Liquid acid catalysts are used as dodecyl alcohol esters and isobutyric acid The most conventional catalyst for esterification, its catalytic effect is better than that of the catalyst used in the prior art, but even so the liquid acid catalyst converts dodecyl alcohol ester into 2,2,4-trimethyl-1,3 -The conversion rate of pentanediol diisobutyrate is also lower than 80%, which causes waste of raw materials

[0003] Catalytic esterification of dodecyl alcohol esters and isobutyrate generally has problems such as high catalyst pollution, poor selectivity, low esterification rate, complex reaction equipment, long reaction time, difficult control of reaction conditions and many by-products, etc., which need to be studied urgently Develop a new type of catalyst

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