Separation of benzene from non-aromatic hydrocarbons by extracti

Details Separation of benzene from non-aromatic hydrocarbons by extracti Separation of benzene from non-aromatic hydrocarbons by extracti

1982-08-02

1985-04-30

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 58, 203 60, 203 61, 203 62, 203 63, 203 64, 203 65, 585864, 585866, B01D 340, C07C 708

Patent

active

045142629

ABSTRACT:
Benzene is virtually impossible to separate from similar close boiling non-aromatic hydrocarbons by conventional rectification or distillation. Benzene can be readily separated from similar boiling non-aromatic hydrocarbons by using extractive distillation in which the extractive agent is a mixture of benzoic acid, maleic anhydride and/or phthalic anhydride plus a suitable solvent. A typical mixture comprises phthalic anhydride, maleic anhydride and adiponitrile.

REFERENCES:
patent: 2655467 (1953-10-01), Cooper et al.
patent: 2842484 (1958-07-01), Fleck
patent: 3869377 (1975-03-01), Eisenlohr et al.
patent: 3882013 (1975-05-01), Katsobashvili et al.
patent: 3884769 (1975-05-01), Mikitenko et al.
patent: 3996305 (1976-12-01), Berger
patent: 4041091 (1977-08-01), Henry
patent: 4363704 (1982-12-01), Berg

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