混合溶剂法精制双酚S的工艺研究

Process for Purification of Bisphenol S by Mixed Solvents

摘要:

为减少废水排放及提高产品质量，研究了醇-四氯乙烷或醇-苯甲醚混合溶剂法精制粗品双酚S。将粗品双酚S在醇中溶解，加入四氯乙烷或苯甲醚，加热条件下活性炭脱色，蒸馏除去醇，过滤得到高质量分数的双酚S精制产品。醇-四氯乙烷精制的最佳工艺条件为：10g粗品于40g异戊醇中溶解，加入100g四氯乙烷，1g活性炭， 50℃~60℃搅拌脱色1h，过滤得滤液，蒸馏除去醇，降温、过滤、干燥，所得精制产品中双酚S的质量分数为99.50%，收率为82%；醇-苯甲醚精制的最佳工艺条件为：10g粗品于40g异丁醇或异戊醇中溶解，加入60g苯甲醚，1g活性炭。搅拌脱色1h，过滤，滤液蒸馏除去醇，降温、过滤、干燥，所得精制产品质量分数达99.80%以上，收率在83%左右。

Abstract:

In order to reduce the wastewater and improve the quality of the product, crude bisphenol S is purified by mixed solvents system of alcohol-tetrachloroethane or alcohol-anisole. Crude bisphenol S is dissolved in an alcohol. Then active carbon is added with tetrachloroethane or anisole under heating conditions. After a period of time of decolorization, the alcohol is removed by distillation. The high quality bisphenol S is obtained by filtration. The optimum conditions of alcohol – tetrachloroethane system are as follows. Firstly 10g crude bisphenol S is dissolved in 40g isoamyl alcohol. Then 100g tetrachloroethane and 1g active carbon are added under stirring and the whole system is heated under 50~60℃ for 1 hour. The alcohol can be removed from the filtrate by distillation after filtration. High quality bisphenol S can be obtained after the rest of the filtrate being cooled, filtered and dried. The mass fraction and yield of bisphenol S obtained by alcohol-tetrachloroethane are 99.50% and 82% respectively. The optimum conditions of alcohol - anisole system are as follows. Firstly 10g crude bisphenol S is dissolved in 40g isobutanol or isoamylalcohol. Then 60g anisole and 1g active carbon are added under stirring and the whole system is heated for 1 hour. The alcohol can be removed from the filtrate by distillation after filtration. High quality bisphenol S can be obtained after the rest of the filtrate being cooled, filtered and dried. The mass fraction of bisphenol S obtained by alcohol-anisole is more than 99.80%, and the yield of which is about 83%.