Method for synthesizing vinyl benzoate

Abstract

The invention relates to a method for synthesizing vinyl benzoate, which is characterized by comprising the following steps of: adding benzoic acid and vinylacetate in a molar ratio of 1:(3-11) and a catalyst into a reaction kettle, heating, stirring, and reacting and refluxing for several hours to obtain reaction liquid containing the vinyl benzoate, wherein the catalyst is a supported Pd / C solid catalyst. The method is simple, equipment investment is small, energy consumption and material consumption are low, the selectivity of the vinyl benzoate is high, the production process is safe and environment-friendly, the catalyst can be repeatedly used, and the production cost is effectively reduced.

Description

technical field [0001] The present invention relates to a kind of method of synthetic vinyl benzoate. It belongs to the scope of fine chemical production technology. Background technique [0002] With the continuous development of science and technology and the increasing emphasis on environmental protection, environmentally friendly photocuring technology has also developed rapidly and has been widely used in coatings, inks, adhesives, microelectronics, dental restorations, and biomaterials. At present, the active diluents commonly used in light-curing materials are mainly acrylate monomers, but they have high volatility, low flash point, high toxicity, and mostly have pungent odors; and many acrylate monomers are well-known carcinogens. Substances, the environmental pollution problem brought in use is difficult to overcome. Its use has been restricted in some countries, so the exploration of new reactive diluents is of great interest. [0003] Vinyl benzoate is an organ...

AI Technical Summary

Problems solved by technology

In the production of vinyl benzoate by the acetylene method, although its raw materials are relatively cheap and easy to get, the strict reaction conditions have high requirements for equipment; the danger of using acetylene; and the slow reaction in the synthesis process, the shortcomings such as low product yield, The industrial application of this method is limited to a large extent; in the production of vinyl benzoate by the ethylene method, the main problem of this process is that there is serious HCl corrosion in equipment and connecting pipelines, which must be made of titanium or titanium alloy; Expensive investment, this method has been basically eliminated

In the production of vinyl benzoate by transesterification, the original process generally uses traditional mercury salt as a catalyst, and the treatment cost is high. This is mainly because the waste liquid contains a large amount of Hg and cannot be discharged directly, otherwise it will cause great harm to the environment. pollution

Images