Yao Yu-yuan
2011
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Synthetic Fiber in China
Abstract
5-sulfoisophthalic acid dihydroxy propyl ester sodium salt(SIPP) was synthsized by the transesterification of 5-sulfoisophthalic acid dimethyl ester sodium salt(SIPM) with 1,3-propanediol(1,3-PDO).The effects of catalysts,catalyst concentration,molar ratio of 1,3-PDO and SIPM and reaction temperature on the transesterification reaction were investigated.The results indicated that Ti(OBu)4 was a efficient catalyst and the amount of Ti(OBu)4 was appropriate to 0.1 % relative to SIPM.The best feed ratio of 1,3-PDO and SIPM was 10.14∶1,and the reaction rate was faster and the product had good color when the reaction temperature was 173 ℃.