Sulfate salt of quinolonecarboxylic acid derivatives and the use thereof
AssigneeKyorin Pharmaceutical Co., Ltd.
InventorsTomomi Koike, Yasuhiro Aizawa
Life of this patent
Estimating the term…
Abstract
A method of treating an industrial waste liquor containing 1-cyclopropyl-7-(3-methyl-1-piperazinyl)-6-fluoro-8-methoxy-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid (gatifloxacin), comprising adding aqueous sulfuric acid to said liquor to form a sulfate of said gatifloxacin, and/or a hydrate of said sulfate; and the sulfate, and/or hydrate of said sulfate, made by said method.
Claims7
A method of treating an industrial waste liquor containing gatifloxacin, comprising adding aqueous sulfuric acid to acidify said liquor, thereby forming a sulfate of said gatifloxacin, and/or a hydrate of said sulfate.
A method of treating an industrial waste liquor containing gatifloxacin, comprising adding aqueous sulfuric acid to said liquor to form a sulfate of said gatifloxacin, and/or a hydrate of said sulfate, as a sediment;
- and recrystallizing the sulfate from water, whereby a hydrate of a sulfate of gatifloxacin is obtained.
A hydrate of the sulfate of gatifloxacin.
The ½ sulfate·⅖ hydrate of gatifloxacin.
Dependencies are inferred from the claim text.