Method for preparing unsaturated carboxylic acid
US9181170B2 · kind B2 · utility
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Key dates
| Filing date | Dec 5, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Dec 5, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for preparing an unsaturated carboxylic acid comprising (a) preparing an aqueous solution comprising an ammonium salt of hydroxycarboxylic acid and a salt of inorganic acid; (b) contacting the aqueous solution with a cation exchange resin to prepare a conversion aqueous solution comprising a hydroxycarboxylic acid and an inorganic acid; and (c) dehydrating the hydroxycarboxylic acid using the inorganic acid as a catalyst is provided.
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