Maleic anhydride esterification process "pave the way" downstream development

The maleic anhydride esterification technology developed by Sinopec's Fushun Research Institute of Petroleum and Chemicals recently passed a technical appraisal organized by China Petrochemical Corporation. Under suitable conditions, the conversion rate of maleic anhydride in this process reaches 100%, the conversion rate of monomethyl maleate is ≥99.6%, and the selectivity of dimethyl maleate is ≥98.2%, which can meet the requirements of the subsequent hydrogenation process. .

The Fushun Research Institute of Petroleum and Chemical Industry developed the maleic anhydride esterification process technology using its own DZH-type resin catalyst developed and commercialized. The institute’s researchers used a special catalytic distillation module, which broke through the limitations of existing foreign technologies, improved the separation efficiency, reduced operating costs, and eventually developed maleic anhydride and methanol as raw materials, and DZH-type resin as the catalyst for maleic anhydride. Esterification process.

The catalytic distilling process used in the process of the diesterification unit has the characteristics of less equipment investment, low operating cost and low energy consumption compared with the fixed bed process. Fushun Research Institute of Petroleum and Petrochemicals completed the design of a 12,000-ton/year 1,4-butanediol (esterification unit) process package in 2002.