Method for removing chlorate from alkali metal hydroxide

Details Method for removing chlorate from alkali metal hydroxide Method for removing chlorate from alkali metal hydroxide

1985-12-24

1987-06-30

Straub, Gary P.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423183, 203 32, 203 37, 203 61, 204 98, C01D 1502, C25B 114, B01D 334

Patent

active

046769714

ABSTRACT:
A method is disclosed for reducing alkali metal chlorate impurities in an aqueous alkali metal hydroxide solution by heating a mixture of the alkali metal hydroxide solution with a hydroxycarboxylic acid or a salt thereof at temperature above about 125.degree. C. and for a period of time sufficient to substantially eliminate the chlorate, the hydroxycarboxylic acid or salt thereof being substantially non-volatile at the heating temperature.

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