Process for preparing 2,6-dialkylnaphthalene

Details Process for preparing 2,6-dialkylnaphthalene Process for preparing 2,6-dialkylnaphthalene

2006-08-01

2006-08-01

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

C585S312000, C585S313000, C585S314000, C585S315000, C585S486000, C585S489000, C585S478000, C585S481000, C585S449000, C585S450000, C585S467000, C528S298000, C528S272000, C528S308000

Reissue Patent

active

RE039222

ABSTRACT:
A process for producing 2,6-dialkylnaphthalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphthalene isomers, monoalkylnaphthalene isomers, polyalkylnaphthalenes, and naphthalene, is provided that includes the following steps:I. separating the hydrocarbon feedstock and/or a dealkylation product fed from step III into a naphthalene fraction, a monoalkylnaphthalene fraction, a dialkylnaphthalene fraction and a remaining products fraction;II. separating and purifying 2,6-dialkylnaphthalene from the dialkylnaphthalene fraction of step I;III. dealkylating the hydrocarbon feedstock and/or the remaining products fraction of step I and feeding the dealkylation product to step I; andIV. alkylating the naphthalene and monoalkylnaphthalene fractions of step I;wherein the hydrocarbon feedstock is fed to step I or step III.

REFERENCES:
patent: 4950824 (1990-08-01), Shiroto et al.
patent: 5292934 (1994-03-01), Sikkenga et al.
patent: 5844064 (1998-12-01), Motoyuki et al.
patent: WO 90/03961 (1990-04-01), None

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