Method for preparing dibutyl itaconate

A technology of di-n-butyl itaconate and itaconic acid, which is applied in the field of preparing di-n-butyl itaconate, can solve the problems of insufficient production process of concentrated sulfuric acid, dark product color, multiple side reactions, etc., and achieve energy consumption The effect of less time, short time and low reaction temperature
CN101735052AActive Publication Date: 2010-06-16QINGDAO LANGYATAI GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO LANGYATAI GRP
Publication Date
2010-06-16
Patent Text Reader

Abstract

The invention discloses a method for preparing dibutyl itaconate. In particular, the method comprises the following steps of: adopting a novel high-efficiency catalysis-polymerization inhibition combined system to catalyze the reaction of itaconic acid and normal butyl alcohol at normal pressure and a temperature of between 90 and 130 DEG C for 2 to 8 hours to form the dibutyl itaconate, wherein the catalysis-polymerization inhibition combined system comprises a catalyst of strong acid ion exchange resin and a polymerization inhibitor of hydroquinone. Compared with the conventional acid catalytic method, the method of the invention has the characteristics that: 1, the reaction time is short, and the energy consumption is low; 2, in a process of esterification, polymers are hardly generated, and the selectivity is high; 3, the product of the dibutyl itaconate is automatically separated from the catalyst, and the separating process is easier; and 4, the used catalyst in the reaction can be directly reused without treatment.
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Description

technical field

[0001] The invention relates to a method for preparing di-n-butyl itaconate, in particular to a method for preparing di-n-butyl itaconate by catalyzing the esterification reaction of itaconic acid and n-butanol with a strongly acidic ion exchange resin. Background technique

[0002] Di-n-butyl itaconate is a colorless and transparent oily liquid with low toxicity. It is an important active monomer, comonomer and intermediate in organic synthesis, and is also an internal plasticizer for various plastics; it can be used automatically Polymerization and copolymerization, the products obtained by copolymerization are widely used in molding materials, coating materials, fiber and film treatment agents, lubricating oil and its additives, binder ion exchange resins, etc. The copolymer containing di-n-butyl itaconate and vinyl acetate has good heat insulation effect; adding di-n-butyl itaconate to detergent can improve the washing effect; di-n-butyl itaconate is also...

Claims

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