Formation of styrene phosphonic acid
US5783730A · kind A · utility
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7Claims
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Key dates
| Filing date | May 2, 1997 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | May 2, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3826
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Styrene phosphonic acid (SPA) can be formed the reaction of phosphorous acid with acetophenone, preferably in the presence of a Lewis acid catalyst, to form a hydroxy adduct intermediate thereof which is then reacted with acetic anhydride to form the acyl derivative of the hydroxy adduct, followed by removal of an acetic acid moiety therefrom, preferably in the presence of an acidic catalyst, to form the styrene phosphonic acid product.
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