SUCCINIC ANHYDRIDE, PROCESS FOR PREPARATION OF THE SAME AND USE THEREOF

摘要

The invention aims at providing succinic anhydride which is little discolored in the molten state, a process for the preparation of such succinic anhydride, and a process for the production of polyester which can give little discolored polyester. The aim can be attained by succinic anhydride characterized in that the ϝ−butyrolactone content is 800 ppm or below and the dilactone content is 500 ppm or below; a process for the preparation of succinic anhydride, characterized in that the hydrogenation is conducted at a temperature of 120 to 160 °C under a hydrogen pressure of 0.1 to 2.0 Mpa in the presence of a catalyst and the distillation is conducted while keeping the bottom temperature within the range of 125 to 200 °C by evacuation; and a process for the production of polyester, characterized by using the above succinic anhydride as the acid component.