Methods for preparing an alkylation catalyst, and for ortho-alkylating hydroxyaromatic compounds; and related compositions
US6294499A · kind A · utility
16Cited by
1References
9Claims
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Key dates
| Filing date | Oct 20, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0018
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing a solid catalyst composition is described. A magnesium reagent which yields magnesium oxide upon calcination, and which includes reduced levels of chlorides and calcium, is dry-blended with at least one filler. Dry-blending is usually carried out in the absence of a promoter. A method for selectively alkylating at least one hydroxyaromatic compound by using the catalyst is also described. A typical product is 2,6-xylenol. Related processes for preparing polyphenylene ethers are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.