Increasing the temperature of the exit gas from the exit gas washer in the preparation of phthalic anhydride
US4662898A · kind A · utility
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6References
3Claims
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Key dates
| Filing date | Sep 11, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Sep 11, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The temperature of the exit gas from the gas washer in the preparation of phthalic anhydride by catalytic oxidation of naphthalene or o-xylene with air is increased by a method in which flue gas from the combustion furnace for residues is mixed with the exit gas before the latter emerges into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.