Palladium-rhodium catalyst for purification of crude terephthalic acid
US4394299A · kind A · utility
21Cited by
6References
22Claims
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Key dates
| Filing date | Oct 29, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Oct 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a purified terephthalic acid which comprises reacting in a liquid phase a mixture of hydrogen and crude terephthalic acid, a palladium/rhodium catalyst on a porous carbonaceous support wherein the catalyst compound is prepared by adsorbing palladium on the support from a complex salt formed in the presence of an amine and acetic acid, followed by deposition of rhodium from a solution of sodium hexanitritorhodate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.