Process for producing dimethylnaphthalene

Details Process for producing dimethylnaphthalene Process for producing dimethylnaphthalene

1993-11-19

1995-08-29

Achutamurthy, P.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

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

585407, 585418, 585419, C07C 500

Patent

active

054462266

ABSTRACT:
A process for efficiently producing dimethylnaphthalene by a single-step reaction which comprises cyclizing dehydrogenating 5-tolyl-penta-2-ene in the presence of a catalyst comprising in combination (a) a solid acid such as crystalline aluminosilicate, silica-alumina or alumina; (b) a noble metal such as palladium and platinum; and a carrier such as carbon, silicon oxide, titanium oxide and zirconium oxide. The process results in simplification of production, effective utilization of reaction heat and rationalization of the heat balance.

REFERENCES:
patent: 5008479 (1991-04-01), Abe et al.
patent: 5043501 (1991-08-01), Del Rossi et al.
Database WPI, Section Ch, Week 7539, Derwent Publications Ltd., London, GB; Class B05, AN 75-64848W of JP-B-50 026 533 (Teijin KK) 1 Sep. 1975.
Database WPI, Section Ch, Week 7529, Derwent Publications Ltd., London, GB; Class E14, AN 75-48770W of JP-B-50 017 983 (Teijin KK) 25 Jun. 1975.
Database WPI, Section Ch, Week 7506, Derwent Publications Ltd., London, GB; Class E14, AN 75-10101W of JP-B-50 001 037 (Teijin Ltd) 14 Jan. 1975.
Database WPI, Section Ch. Week 7506, Derwent Publications Ltd., London, GB; Class E14, AN 75-10100W of JP-B-50 001 036 (Teijin Ltd) 14 Jan. 1975.
Datbase WPI, Section Ch, Derwent Publications Ltd., London, GB; Class E14, AN 73-76504U of JP-A-48 067 261 (Teijin Ltd) 1973.

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