Process for selective manufacture of 2,6-diisopropylnaphthalenes

Details Process for selective manufacture of 2,6-diisopropylnaphthalenes Process for selective manufacture of 2,6-diisopropylnaphthalenes

1989-01-27

1991-03-26

Shine, W. J.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585462, 585466, 585467, C07C 15067

Patent

active

050031201

ABSTRACT:
A process for the selective manufacture of 2,6-diisopropylnaphthalene from naphthalene advantageously combines an equilibration reactor to enhance the amount of monoisopropylnaphthalene fed to the alkylation reactor, and the use of a shape selective catalyst in the alkylation reactor, to obtain an alkylation reaction product in which the 2,6-diisopropylnaphthalene isomer comprises greater than 39 mole percent of the total diisopropylnaphthalene obtained. Further, this combination of reaction steps and conditions produces a reaction product in which the ratio of 2,6-diisopropylnaphthalene to 2,7-diisopropylnaphthalene is greater than 1.0, preferably greater than 1.2. Recycled process components are fed to the equilibration reactor where they are combined with fresh naphthalene feed to provide a monoisopropylnaphthalene enriched feed to the alkylation reactor.

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