Dehydrocyclodimerization process start-up procedure

Details Dehydrocyclodimerization process start-up procedure Dehydrocyclodimerization process start-up procedure

1989-05-26

1990-07-31

Pak, Chung K.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By ring formation from nonring moiety, e.g., aromatization,...

585415, C07C 202, C07C 200

Patent

active

049451758

ABSTRACT:
A dehydrocyclodimerization process employing a catalyst comprising a crystalline aluminosilicate and a metal oxide component is started-up by contacting the catalyst with a start-up gas that contains less than 50 mole percent hydrogen. The catalyst is exposed to the gaseous atmosphere containing less than 50 mole percent hydrogen until a C.sub.2 -C.sub.5 aliphatic hydrocarbon feedstock is contacted with the catalyst at dehydrocyclodimerization reaction conditions at which point hydrogen is generated as a dehydrocyclodimerization reaction product and displaces the non-hydrogen start-up gas from the process.

REFERENCES:
patent: 3449237 (1969-06-01), Jacobson et al.
patent: 3650944 (1972-03-01), McCoy et al.
patent: 4615792 (1986-10-01), Greenwood
patent: 4636483 (1987-01-01), Kiell et al.

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