摘要
阐述了聚-烯烃合成油制备过程中BF3络合物的分离及回收方法,包括吸附法、萃取法、吸收法、沉降法和裂解法。吸附法中SiO2和金属氟化物容易制备,适于小规模应用。萃取法中醇类萃取剂价格便宜、毒性小,优于氟代烷烃类萃取剂。吸收法产生副产物酸性化合物,腐蚀性强,已逐渐被淘汰。沉降法耗能较大,适于小规模应用。本文还介绍了裂解法的4种工艺,包括闪蒸/蒸发工艺、闪蒸-络合工艺、蒸馏-相分离工艺和裂解-气液分离工艺。综合4种工艺的优点,本实验室设计出真空蒸馏与BF3络合相结合的工艺,此工艺裂解充分,裂解后的BF3气体能够得到充分分离回收,具有一定的应用前景。
This paper reviewed several methods of separating and recovering BF3 complexes, including adsorption, extraction, adsorption, subsidence and cracking. SiO2 and metallofluoride can be easily produced in adsorption method, which suited to small-scale applications. In extraction method, the cheaper and less poisonous alcohols are superior to hydrofluorocarbons as the extraction reagents. Highly corrosive acids can be generated in the adsorption method; therefore, this method has been phased out. Subsidence method consumes large amounts of energy and is appropriate to small-scale applications. Four technologies of the cracking method were introduced in more detail in this paper, including flash-evaporation, flash-complexing , distillation-phase separation and cracking-gas/liquid separation technology. The designed technology combining vacuum distillation with BF3 complexing was able to achieve high cracking rate, high BF3 separating and recovery rate.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2013年第7期1468-1473,共6页
Chemical Industry and Engineering Progress
