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Separation of benzene and toluene from close boiling nonaromatics by extractive distillation
Author(s) -
Berg Lloyd
Publication year - 1983
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690290614
Subject(s) - toluene , extractive distillation , phthalic anhydride , benzene , boiling , chemistry , distillation , maleic anhydride , organic chemistry , ethylbenzene , catalysis , polymer , copolymer
Benzene and toluene are virtually impossible to separate from close boiling nonaromatic hydrocarbons by rectification. Benzene and toluene can be readily separated from similar boiling nonaromatics by using extractive distillation in which the extractive distillation agent is a proper mixture of organic compounds boiling higher than benzene or toluene. A typical extractive distillation agent for benzene is a mixture of phthalic anhydride, maleic anhydride, and adiponitrile; for toluene, phthalic anhydride, maleic anhydride, and glycerol triacetate.