Manufacture of oxalic acid dihydrate

Details Manufacture of oxalic acid dihydrate Manufacture of oxalic acid dihydrate

2008-07-29

2008-07-29

Zucker, Paul A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

11724720

ABSTRACT:
A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.

REFERENCES:
patent: 1031074 (1912-07-01), Lidbury
patent: 7244862 (2007-07-01), Zaher et al.

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