A new technology of DPC production has through the identification

Diphenyl carbonate (DPC) is the fastest growing market demand in recent years, plastic - polycarbonate (PC) materials. Transesterification of diphenyl carbonate production is internationally recognized advanced production technology, long-term foreign minority chemical giant monopoly.

It is reported that China State Construction Engineering Corporation-owned installation built in collaboration with Zhejiang University's "transesterification process and catalyst development" project results through identification, reached the international advanced level.

According to reports, "the transesterification process and catalyst development," the research group through research cooperation, the development of a highly efficient ionic liquids used in the preparation of diphenyl carbonate ester exchange catalyst and optimization of the "pressor response - Distillation transesterification and subtraction pressure reaction - "two-step preparation of DPC process, so DPC selectivity reached 95.9%, the total yield of 81.5%, with a conversion rate of raw materials, good separation efficiency and other characteristics distillation disproportionation of diphenyl carbonate and other production processes and the development of non-phosgene polycarbonate synthetic route instructive.

It is understood that the three major application areas is PC plastic glazing, automotive and electronics, electrical industry, followed by industrial machinery parts, packaging, computers and other office equipment, medical and health, film, leisure and protective equipment.

Polycarbonate is currently the world's largest consumer market in China. It is expected that future global polycarbonate industry annual growth rate of 5.6%, in 2017 the global polycarbonate production capacity will reach 6.136 million tons.