AMS-1B crystalline borosilicate molecular sieve-based catalyst c

Details AMS-1B crystalline borosilicate molecular sieve-based catalyst c AMS-1B crystalline borosilicate molecular sieve-based catalyst c

1985-11-25

1987-06-02

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

C07C 268

Patent

active

046706160

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.

REFERENCES:
patent: 4491678 (1985-01-01), Ods et al.

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