Process for the separation of chlorohydrocarbons from lower boil

Details Process for the separation of chlorohydrocarbons from lower boil Process for the separation of chlorohydrocarbons from lower boil

1975-08-13

1976-12-21

Bernstein, Hiram H.

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

For scale inhibiting or corrosion preventing

203 38, 203 53, 203 59, 203 87, 203 93, 203 97, 203 29, 260652P, B01D 334

Patent

active

039987060

ABSTRACT:
A process for separating lower-boiling chlorohydrocarbons and water from neutralized crude chlorohydrocarbons having at least two carbon atoms, which comprises fractionally distilling the crude chlorohydrocarbons in a fractionating column, thereby obtaining a fraction A containing the desired product which is withdrawn at the bottom of the column practically free of impurities, and a fraction B, comprising water, impurities having a lower boiling point, and entrained amounts of the desired chlorohydrocarbon, withdrawing said fraction B from the top of the column and, while still in gaseous state, neutralizing fraction B with an aqueous solution of a mixture of basic compounds, thereby avoiding corrosion of the apparatus, and thereafter subjecting the gaseous fraction to stepwise condensation with recovery of the entrained portions of said chlorohydrocarbon by returning them to the fractionating column, while separately removing water and undesirable impurities.

REFERENCES:
patent: 2589212 (1952-03-01), Agapetus
patent: 2908640 (1959-10-01), Dougherty
patent: 3676327 (1972-07-01), Foroulis
patent: 3779905 (1973-12-01), Stedman
patent: 3790496 (1974-02-01), Hausler
patent: 3846253 (1974-11-01), Obrecht

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