Process for separating a high purity vinyl aromatic hydrocarbon

Details Process for separating a high purity vinyl aromatic hydrocarbon Process for separating a high purity vinyl aromatic hydrocarbon

1975-07-11

1976-04-27

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 58, 203 82, 203 39, 260669A, 208313, 208326, B01D 340, C07C 1510

Patent

active

039533000

ABSTRACT:
Styrene of exceptional purity is separated from a mixture of hydrocarbons including it, xylenes, saturated and olefinic hydrocarbons and ethyl benzene by means of a two-step extractive distillation process through the use of a high boiling polar solvent such as N-formyl morpholine in admixture with an amount of water in the range of from 1% to 30% by weight.

REFERENCES:
patent: 2465715 (1949-03-01), Engel
patent: 2465718 (1949-03-01), Engel
patent: 2467198 (1949-04-01), Greene
patent: 3018228 (1962-01-01), Cornell
patent: 3210259 (1965-10-01), Cornell
patent: 3328267 (1967-06-01), Muller
patent: 3434936 (1969-03-01), Luther et al.
patent: 3551327 (1970-12-01), Kelly et al.
patent: 3720605 (1973-03-01), Pareb
patent: 3763037 (1973-10-01), Thompson
patent: 3784626 (1974-01-01), Gennasi et al.

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