Process for the continuous separation of maleic anhydride from process gases
US4314946A · kind A · utility
3Cited by
1References
4Claims
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Key dates
| Filing date | Mar 14, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Mar 14, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the continuous separation of maleic acid anhydride from process gases from the catalytic oxidation of hydrocarbons, e.g., n-butane, in the steam phase. The process gases are treated with a solvent, which is a cycloaliphatic acid ester. Typically, the cycloaliphatic acid ester is a dialkyl ester, having 4 to 8 carbon atoms in each alkyl group, of hexahydrophthalic acid, tetrahydrophthalic acid, methyltetrahydrophthalic acid or methylhexahydrophthalic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.