A method for synthesizing tri-n-butyl citrate with acid-modified h-zms-5 type molecular sieve

A technology of H-ZMS-5 and tri-n-butyl ester, which is applied in the direction of molecular sieve catalysts, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of unsatisfactory catalytic effect of molecular sieves, difficult treatment of reaction waste liquid, and high production costs. , to achieve high yield, reduce the amount of acid, and reduce the effect of corrosion
CN108892613BActive Publication Date: 2021-02-19GUANGDONG IND TECHN COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG IND TECHN COLLEGE
Publication Date
2021-02-19

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Abstract

The invention belongs to the field of tri-n-butyl citrate synthesis, in particular to a method for synthesizing tri-n-butyl citrate with an acid-modified H-ZMS-5 molecular sieve. The method comprises the following steps: soaking the H-ZMS-5 molecular sieve with sulfuric acid after activation, the concentration of the sulfuric acid is 1-18mol / L, and the soaking time is 1-18h; after suction filtration, the solid is dried and ground into powder to obtain Acid-modified H-ZMS-5 molecular sieve; Anhydrous citric acid, n-butanol, acid-modified H-ZMS-5 molecular sieve are added to a reaction vessel for esterification to obtain tri-n-butyl citrate; the esterification reaction temperature The temperature is 110-140°C, and the reaction time is 1-9h. The invention combines the advantages of high catalysis of concentrated sulfuric acid and molecular sieve, and has the characteristics of high yield, easy purification, reduced environmental pollution and the like.
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Description

Technical field

[0001] The invention belongs to the field of synthesis of tri-n-butyl citrate, and specifically relates to a method for synthesizing tri-n-butyl citrate by an acid-modified H-ZMS-5 molecular sieve.Background technique

[0002] In recent years, China has gradually become the country with the largest plasticizer production and consumption in Asia. Compared with foreign countries, my country's plasticizer varieties are slightly single, and the product structure is unreasonable. In addition, there are more synthetic units and poor yield. Discharge pollution of high and acid-base waste is serious, forcing many domestic plasticizer companies to reduce or suspend production. In addition, in recent years, more and more studies and reports have publicly demonstrated the negative effects of dioctyl phthalate DOP and other phthalic plasticizers. Due to the lack of raw material sources such as isononanol and decanol in my country, the production and sales structure of plasticizers in ...

Claims

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