Process and apparatus for purifying vinyl chloride

Details Process and apparatus for purifying vinyl chloride Process and apparatus for purifying vinyl chloride

1994-12-07

1996-04-16

McMahon, Timothy M.

Distillation: processes, separatory

With disparate physical separation

Utilizing solid sorbent

23 14, 23 71, 23 73, B01D 1500

Patent

active

055079202

ABSTRACT:
In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

REFERENCES:
patent: 3476955 (1969-11-01), Krekeler et al.
patent: 3761361 (1973-09-01), Wall
patent: 3843736 (1974-10-01), Rechmeier et al.
patent: 3963584 (1976-06-01), Tsao
patent: 4642400 (1987-02-01), Cowfer et al.
patent: 4769112 (1988-09-01), Wheldon

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