Title:
A PROCESS FOR THE ISOLATION OF AROMATIC HYDROXYCARBOXYLIC ACIDS
Document Type and Number:
WIPO Patent Application WO2000001653
Kind Code:
A9
Abstract:
Processes are provided for the electrodialysis of a (di)alkali metal salt of an aromatic hydroxycarboxylic acid to produce a free aromatic hydroxycarboxylic acid and the alkali metal hydroxide, in the presence of a selected alkali metal salt. These various embodiments represent efficient and economical methods for recovering the alkali metal hydroxide, as well as the parent organic compound, from these dialkali metal salts. These processes also desirably prevent overvoltage during the electrodialysis.
Inventors:
SAMUELS MICHAEL ROBERT (US)
YABROFF RONALD M (US)
YABROFF RONALD M (US)
Application Number:
PCT/US1999/015305
Publication Date:
June 28, 2001
Filing Date:
July 07, 1999
Export Citation:
Assignee:
DU PONT (US)
SAMUELS MICHAEL ROBERT (US)
YABROFF RONALD M (US)
SAMUELS MICHAEL ROBERT (US)
YABROFF RONALD M (US)
International Classes:
B01D61/44; C02F1/469; C07C51/02; C07C51/42; C07C51/487; C07C65/03; C07C65/10; C07C65/11; (IPC1-7): C07C51/02; B01D61/44; C07C65/03; C07C65/10; C07C65/11
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