Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Patent
1999-08-27
2000-12-12
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
208109, 208114, 208118, 208121, 20811101, 20811115, 423702, 423709, 423711, C07C 522, C10G 4712, C10G 4700, C10G 1102
Patent
active
061601918
ABSTRACT:
A process for converting hydrocarbons by contacting a hydrocarbon feedstream under hydrocarbon conversion conditions with a large crystal zeolite catalyst. The large crystal zeolite of the catalyst used in the hydrocarbon conversion process is made by heating an aqueous zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the synthesis mixture. After this step, the aqueous synthesis mixture is heated in the absence of agitation to a temperature equal to or greater than the effective nucleation temperature of the aqueous zeolite synthesis mixture. The process finds particular application in hydrocarbon conversion processes where reduced non-selective acidity is important for reaction selectivity and/or the maintenance of catalyst activity, e.g., toluene disproportionation, dealkylation, alkylation, and transalkylation.
REFERENCES:
patent: 3503874 (1970-03-01), Michalko
patent: 4375458 (1983-03-01), Dwyer et al.
patent: 4650656 (1987-03-01), Dwyer et al.
Patent Abstracts of Japan, vol. 008, No. 114 (C-225), May 26, 1984 and JP 59026917A (KAO Sekken KK), Feb. 13, 1984.
Colle Thomas Herman
Mohr Gary David
Smith Robert Scott
van den Berge, executrix by Jannetje Maatje
Verduijn, deceased Johannes Petrus
Exxon Chemical Patents Inc.
Griffin Walter D.
Nguyen Tam M.
Sherer Edward F.
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