Industrial production process and device of injection molding grade polyphenylene sulfide resin

• Main Authors: LIU BIN, LI ZHENGHUI, LI GUIJIE, ZHANG QIANHE, LIU WEIQIANG, YU GUOHUI, MA QIANG, LU WENMING, LI JIALI
• Format: Patent
• Language: Chinese; English
• Published: 14.08.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses an industrial production process of injection molding grade polyphenylene sulfide resin. The process comprises the following steps: 1) adding acetic anhydride, sodium hydroxideand an organic solvent into a dehydration reaction kettle to react, and then adding sodium hydrosulfide to obtain a dehydrated sodium hydrosulfide solution; 2) transferring the sodium hydrosulfide solution into a polymerization reaction kettle, adding benzene dihalide for polymerization reaction, then transferring into flash evaporation drying equipment, and removing an organic solvent and waterto obtain a crude product; 3) and 4) washing, filter-pressing and drying the crude product. According to the production process, cheap organic acid salt is used as a catalyst to prepare polyphenylenesulfide so that the process is more economical and environment-friendly, few catalysts are remained in the product, and complex post-treatment steps are not needed. According to the production process, sodium hydrosulfide and p