AMS-1B crystalline borosilicate molecular sieve-based catalyst compositions and process for toluene methylation
US4670616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1985 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Nov 25, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Described are catalyst compositions comprising a HAMS-1B crystalline borosilicate molecular sieve, the majority of the crystallites of which are between about 1 micron and about 15 micron in largest diameter, incorporated into an inorganic matrix, which have been impregnated with a small amount of a magnesium compound, said impregnated compositions having improved para-selectively for toluene methylation to xylene. Such impregnated compositions, when used for the methylation of toluene using methanol or dimethylether, yield a xylene product containing a very high proportion of the para isomer compared to corresponding unimpregnated or magnesium compound-impregnated borosilicate-based compositions containing standard size (0.2.mu. to 0.5.mu.) borosilicate molecular sieve crystallites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.