Aluminoborosilicate containing alkaline earth metal, a method fo

Details Aluminoborosilicate containing alkaline earth metal, a method fo Aluminoborosilicate containing alkaline earth metal, a method fo

1988-07-19

1990-05-15

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

C07C 100

Patent

active

049260065

ABSTRACT:
The aluminoborosilicate containing an alkaline earth metal element, e.g. calcium, characterized by the chemical composition and the X-ray diffraction pattern is prepared by the hydrothermal reaction of a reaction mixture containing the source materials of boron and the alkaline earth in a similar procedure to that for the preparation of ZSM-5 type zeolites. Different from the conventional ZSM-5 zeolites into which calcium ions are introduced by ion exchange, the calcium ions in the inventive aluminoborosilicate are not replaceable by ion exchange with protons or alkali metal ions. The aluminoborosilicate of the invention after conversion into the hydrogen form is an excellent catalyst for the conversion of methyl alcohol or dimethyl ether into lower olefins such as ethylene and propylene in respect of the selectivity and durability of the catalytic activity with remarkably decreased deposition of carbonaceous materials.

REFERENCES:
patent: 4767886 (1988-08-01), Kawamura

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