Method of obtaining dried terephthalic acid
US4230886A · kind A · utility
2Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Jun 8, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Jun 8, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Terephthalic acid produced by oxidizing paraxylene can be obtained in the form of dried powder from the slurry containing terephthalic acid and acetic acid and/or water by using combination of a tubular type heater having at least one heating tube and a separation chamber in which the heating tube(s) open(s) at one end(s) thereof. Critical slurry concentrations for smooth operation are given.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.