Polyhydrated sodium sulfide dewatering techn during production of polyphenyl thioether


Application Number: 00116141
Application Date: 2000.09.30
Publication Number: 1312306
Publication Date: 2001.09.12
Priority Information:
International: C08G75/02
Applicant(s) Name: Huatuo Industry Development Co., Ltd., Sichuan Prov.
Address:
Inventor(s) Name: Jiang Yue
Patent Agency Code: 51105
Patent Agent: zhang peng
Abstract The present invention adopts polyhydrate sodium sulfide and p-dichlorobenzene as raw material, and utilizes the processes of dehydrating sodium sulfide and polycondensation to produce polyphenylene sulfide (PPS) monomer. It is characterized by that in the course of dehydration of polyhydrate sodium sulfide the polyhydrate sodium sulfide and NMP solution are heated in reactor to produce azeotropism at 180-220 deg.C so as to make crystal water of polyhydrate sodium sulfide be carried out with vapour phase. Said invention has no need of special dehydration equipment, and the temp. rising for dehydration is identical to the temp. rising direction of next operation for adding p-dichlorobenzene to implement polycondensation reaction, so it can prevent extra energy consumption.