Process for the regeneration of sodium hydroxide from sodium sul

Details Process for the regeneration of sodium hydroxide from sodium sul Process for the regeneration of sodium hydroxide from sodium sul

Filed on

1995-05-02

Date issued

1996-04-16

Examiner

Langel, Wayne

Patent Class

Chemistry of inorganic compounds

SubClass

Oxygen or compound thereof

SubSubClass

Metal containing

Other Related Categories

423183, 4235611, 423657, 423658, 585469, C01D 104

Type

Patent

Status

active

Patent number

055080189

Description

ABSTRACT:
The present invention is directed toward a process for regenerating sodium hydroxide (NaOH) from aqueous solutions of sodium sulfide (Na.sub.2 S) comprising heating aqueous sodium sulfide in the presence of a metal selected from the group consisting of iron and cobalt, for a time and at a temperature sufficient to form a metal sulfide, sodium hydroxide and molecular hydrogen.

REFERENCES:
patent: 458563 (1891-09-01), Ellershausen
patent: 2164141 (1939-06-01), Moore
patent: 3104157 (1963-09-01), Kimberlin et al.
patent: 4105441 (1978-08-01), Patel
patent: 4163043 (1979-07-01), Dezael et al.
patent: 4684472 (1987-08-01), Abbe et al.
patent: 4981556 (1991-01-01), Hedblom et al.
Chemical Abstracts 84:61600 (1984).

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