CAJ | 학술논문

聚苯硫醚(PPS)的工业合成采用对二氯苯和硫化钠为原料,N-甲基-2-吡咯烷酮(NMP)为溶剂,氯化锂为助剂,经加压缩聚反应而成.该反应除了获得PPS外,还产生一部分副产物淤浆,有必要对其组成物进行分离回收和资源化利用.本文采用四氢呋喃(THF)为添加剂对这种副产物淤浆进行了分离研究,并对其中的锂盐进行了回收研究.结果表明,采用THF添加剂可以较为容易地将浆料分离为PPS低聚物、NMP以及无机盐,采用有机溶剂提取法可以回收氯化锂,LiCl的回收率可达40%.
취분류미(PPS)적공업합성채용대이록분화류화납위원료,N-갑기-2-필각완동(NMP)위용제,록화리위조제,경가압축취반응이성.해반응제료획득PPS외,환산생일부분부산물어장,유필요대기조성물진행분리회수화자원화이용.본문채용사경부남(THF)위첨가제대저충부산물어장진행료분리연구,병대기중적리염진행료회수연구.결과표명,채용THF첨가제가이교위용역지장장료분리위PPS저취물、NMP이급무궤염,채용유궤용제제취법가이회수록화리,LiCl적회수솔가체40%.
Polyphenylene sulfide (PPS) is commercially prepared by reacting p-dichlorobenzene with sodium sulfide in N-methyl-2-pyrrolidone (NMP) in the presence of polymerization assistant such as lithium chloride. After collection of PPS,there is by-product slurry containing lithium chloride and NMP need to be treated. The separation of the slurry and the recovery of lithium chloride from the slurry were studied in this paper. The results showed that the slurry could be separated into PPS oligomers,NMP and inorganic salts easily by addition of tetrahydrofuran. The lithium chloride,existed in inorganic salts,is recovered by extraction with suitable organic solvents with a recovery above 40%.