Process for preparing alkylation catalysts
US4568662A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 3, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Preparation of alkylation catalysts containing iron oxide and/or chromium oxide, by means of a process which comprises: PA0 (a) precipitating hydrate oxides of iron and/or chromium from an aqueous solution of soluble compounds of said elements; PA0 (b) separating the thus obtained precipitate, and washing said precipitate; PA0 (c) granulating the washed precipitate, and drying the granules so obtained; PA0 (d) calcining said dried granules at high temperature; in which an organic carboxylic acid salt of iron and/or chromium is added to and homogenized with the washed precipitate from stage (b), and/or the dried granules from stage (c) are impregnated with an aqueous solution of an organic carboxylic acid salt of iron and/or chromium. The catalysts obtained by means of the above process are mechanically strong, and highly active in the production process of 2,6-xylenol by means of the alkylation of phenol or o-cresol with methanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.