Process for purification of alkenyl aromatic compounds containin

Details Process for purification of alkenyl aromatic compounds containin Process for purification of alkenyl aromatic compounds containin

1989-02-27

1990-06-12

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

585808, 585802, 585809, 585654, 568435, C07C 4590, C07C 700

Patent

active

049334999

ABSTRACT:
The invention relates to a process for the purification of alkenyl aromatic compounds which contain benzaldehyde as an impurity. This process comprises steps for contacting a benaldehyde-containing alkenyl aromatic compound with a bisulphite treating agent, and separating the resulting benzaldehyde-bisulphite addition product from the alkenyl aromatic compound. In certain preferred embodiments, the treating agent is a modified anion-exchange resin containing bound bisulphite ions. Optionally, the process then further comprises a step for recovering the benzaldehyde from the resin addition product by contact with an aqueous sodium carbonate solution or by steam distillation.

REFERENCES:
patent: 2544562 (1951-03-01), Michael
patent: 2897238 (1959-07-01), Toppel
patent: 3816478 (1974-06-01), Washall et al.
patent: 4277626 (1981-07-01), Forss et al.
patent: 4691034 (1987-09-01), Sanderson et al.

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