Two-step method for the alkenylation of maleic anhydride and related compounds
US4110349A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1976 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Jun 11, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Substituted carboxylic acids of the type prepared by the alkylation of maleic anhydride with an olefin polymer (e.g., polybutene) are prepared by a two-step method which is more economical and efficient than previously known methods. In the first step, the alkylating hydrocarbon is reacted with an unsaturated dicarboxylic acid or derivative thereof in an amount of the latter equal to about 30-90% by weight of the amount required to afford the desired product, optionally in the presence of a small amount of chlorine. In the second step, additional acid or derivative thereof is added and the reaction is continued in the presence of added chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.