Process for the production of very pure bromine

Details Process for the production of very pure bromine Process for the production of very pure bromine

1977-09-23

1978-11-14

Thomas, Earl C.

Chemistry of inorganic compounds

Halogen or compound thereof

Elemental halogen

423504, C01B 710

Patent

active

041255950

ABSTRACT:
A process for the production of highly pure bromine from heated bromine-containing solutions. The process is an improvement over prior bromine-extraction methods comprising introducing steam and chlorine countercurrent to heated bromine-containing solution into a bromine column having a reboiler said reboiler having a liquid zone and a gaseous zone, withdrawing a mixture of bromine, chlorine and steam overhead from said bromine column, condensing the mixture of bromine, chlorine and steam withdrawn overhead to form crude bromine and sour water and distilling the crude bromine so formed. The improvement comprises introducing the chlorine gas controlled in dependency on the density of crude bromine into the upper two thirds of the liquid zone in said reboiler, introducing about 40% to about 80% of the theoretically needed steam into the lower third of the liquid zone in said reboiler, and introducing the remainder of the steam regulated in dependence on the bromine-chlorine-steam mixture withdrawn overhead from said bromine column into the gaseous zone of the reboiler or the lower part of the bromine column.

REFERENCES:
patent: 2359221 (1944-09-01), Kenaga
patent: 3314762 (1967-04-01), Hahn
patent: 3959450 (1976-05-01), Calloue et al.
patent: 4031194 (1977-06-01), Ogawa et al.

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