Phosphorus modified small pore molecular sieve catalysts, and th

Details Phosphorus modified small pore molecular sieve catalysts, and th Phosphorus modified small pore molecular sieve catalysts, and th

1997-10-03

1999-07-20

Dunn, Thomas

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Including organic component

502 60, 502 64, 502 85, 502162, 502208, B01J 2906, B01J 2716

Patent

active

059255862

ABSTRACT:
A process for the modification of a small pore molecular sieve catalyst to increase its selectivity to ethylene in the production of light olefins from oxygenated compounds, particularly methanol. The catalyst is modified with phosphorus by incorporating a phosphonitrilic oligomer with the catalyst, and then calcining the catalyst at temperature sufficient to decompose the phosphonitrilic oligomer, and deposit from about 0.001 wt. % to about 50 wt. % phosphorus on the catalyst. This modification provides a novel composition in that it increases the ethylene selectivity of the catalyst in the production of light olefins from oxygenates as contrasted with a small pore molecular sieve catalyst otherwise similar except that it has not been so treated and modified with the phosphonitrilic oligomer.

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PCT/US97/23736 International Search Report (Jun. 1998).

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