Integrated process of synthesizing acetyl tributyl citrate by using activated carbon immobilized p-toluenesulfonic acid catalyst

Abstract

The invention relates to an integrated synthetic process of synthesizing acetyl tributyl citrate by using an activated carbon immobilized p-toluenesulfonic acid catalyst. The synthetic process comprises the step of preparing the activated carbon immobilized p-toluenesulfonic acid catalyst. The step of catalytically synthesizing acetyl tributyl citrate comprises the step of adding acetic anhydride into a dealcoholized tributyl citrate coarse product to react to obtain an acetyl tributyl citrate finished product. The integrated synthetic process provided by the invention overcomes the defects that the existing acetyl tributyl citrate preparation method is complex in process, long in production period, great in product loss and more in three wastes, pollutes environment and the like. The acetyl tributyl citrate produced by the method provided by the invention needs not to be separated and washed but is directly acylated after being dealcoholized. The used catalyst is simple to prepare and easy to separate and recover, and the reaction condition is mild and the product quality is good.

Description

technical field [0001] The present invention relates to a synthesis method of plasticizer acetyl tributyl citrate (ATBC), in particular to an integrated synthesis process for synthesizing acetyl tributyl citrate with an activated carbon immobilized p-toluenesulfonic acid catalyst, which belongs to chemical synthesis and craft fields. Background technique [0002] Traditional plasticizers, phthalates, may cause cancer, and foreign countries have legislated to restrict their use. Acetyl tributyl citrate (ATBC), as a new "green" plasticizer, has been approved by the US Food and Drug Administration (FDA). ATBC has the advantages of non-toxic, odorless, anti-mildew, good plasticizing effect, cold resistance, light resistance, water resistance, and low volatility. It is widely used in food packaging, medical products, children's toys and other fields, and has become a substitute for phthalates. The product of choice for plasticizers. [0003] At present, there is a huge gap in ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a kind of integrated process of synthesizing acetyl tributyl citrate under the action of solid acid catalysis, has overcome the complex process that existing acetyl tributyl citrate preparation method exists, the production cycle is long, the product Disadvantages such as large loss, many "three wastes" and environmental pollution, the tributyl citrate produced according to the method of the present invention does not need to be separated and washed, but directly carries out acylation reaction after dealcoholization, and the catalyst used is simple to prepare, Easy separation and recovery, and mild reaction conditions, good product quality