High purity benzene production using extractive distillation

Details High purity benzene production using extractive distillation High purity benzene production using extractive distillation

1993-10-27

1995-03-28

Reamer, James H.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

208 89, 203 58, C07C 708

Patent

active

054013658

ABSTRACT:
A process is provided for separating benzene from non-aromatics in a highly aromatic stream containing olefins in a concentration range of from about 0.05 to about 5.0, which process comprises predistilling said highly aromatic stream to produce a distilled fraction having a concentration of C.sub.8 and heavier compounds of less than about 0.1 wt percent; and extracting said distilled fraction with a solvent comprising substituted morpholines in an extractive distillation zone to produce a highly-pure benzene stream.

REFERENCES:
patent: 3434936 (1969-03-01), Luther et al.
patent: 4191615 (1980-03-01), Schulze et al.
patent: 4456527 (1984-06-01), buss
patent: 4997547 (1991-03-01), Emmrich et al.
patent: 5031754 (1991-07-01), Emmrich et al.
patent: 5139651 (1992-08-01), Forte
patent: 5180474 (1993-01-01), Skatulla et al.

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