Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1975-10-28
1976-12-07
Sofer, Jack
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 73, 260618A, 260624A, B01D 300, B01D 334, C07C 2900
Patent
active
039961117
ABSTRACT:
A process for recovering and separating substantially pure ethylphenol and substantially pure diethylbenzene from a mixture resulting from the decomposition of diethylbenzene monohydroperoxide and consisting essentially of diethylbenzene, ethylphenol and oxygenated by-products thereof, said process comprising distilling said mixture in a first distillation step operated under reduced pressure to separate a distillate comprising essentially diethylbenzene from a first residue comprising ethylphenol and the oxygenated by-products of said mixture, withdrawing said residue and distilling said first residue in a second distillation step operated under reduced pressure to separate a distillate consisting essentially of ethylphenol from a second residue containing from 30 to 40 mole % of ethylphenol in admixture with said oxygenated by-products, withdrawing said second residue and mixing it with the distillate from the first distillation step, treating the resulting mixture with an aqueous alkaline solution to form an aqueous extract and a raffinate, recovering ethylphenol from said extract and distilling said raffinate in a third distillation step to obtain a distillate consisting essentially of diethylbenzene and a residue consisting essentially of ethyl-acetophenone and 1-(ethylphenyl) ethanol, said extract is neutralized with a mineral acid to regenerate ethylphenol as a separate organic phase which is then mixed with the residue from said first distillation column, for purification in said second distillation column.
REFERENCES:
patent: 2727074 (1955-12-01), Bewley
patent: 2824048 (1958-02-01), Hupe et al.
patent: 2992169 (1961-07-01), Gregory et al.
patent: 3168577 (1965-02-01), Weinstein et al.
patent: 3592857 (1971-07-01), Shinohara
Labofina S.A.
Sofer Jack
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