Production of diisopropylbenzene

Details Production of diisopropylbenzene Production of diisopropylbenzene

2005-08-23

2005-08-23

Dang, Thuan D (Department: 1764)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By alkyl or aryl transfer between molecules, e.g.,...

Reexamination Certificate

active

06933419

ABSTRACT:
A process for the disproportionation of cumene is disclosed which comprises the step of contacting a feed containing cumene, under disproportionation conditions, with a catalyst comprising a molecular sieve, preferably TEA-mordenite. The contacting step disproportionates at least part of the cumene in the feed to provide a disproportionation effluent containing benzene and a mixture of diisopropylbenzene isomers. The effluent is then recovered and contains, prior to any separation step, less 1% of ortho-diisopropylbenzene by weight of the total diisopropylbenzene content of said effluent, less than 1 wt % of n-propylbenzene, less than 5 wt % of triisopropylbenzenes and less than 5 wt % of disproportionation products other than benzene and diisopropylbenzenes.

REFERENCES:
patent: 2868854 (1959-01-01), Lien et al.
patent: 3308069 (1967-03-01), Wadlinger et al.
patent: 3449070 (1969-06-01), McDaniel et al.
patent: 3766093 (1973-10-01), Chu
patent: 3780123 (1973-12-01), Suggitt
patent: 3894104 (1975-07-01), Chang et al.
patent: 4367359 (1983-01-01), Kaeding
patent: 4415438 (1983-11-01), Dean et al.
patent: 4439409 (1984-03-01), Puppe et al.
patent: 4822943 (1989-04-01), Burress
patent: 4826667 (1989-05-01), Zones et al.
patent: 4954325 (1990-09-01), Rubin et al.
patent: 4992606 (1991-02-01), Kushnerick et al.
patent: 5198595 (1993-03-01), Lee et al.
patent: 5236575 (1993-08-01), Bennett et al.
patent: 5243116 (1993-09-01), Lee et al.
patent: 5250277 (1993-10-01), Kresge et al.
patent: 5329059 (1994-07-01), Marler
patent: 5362697 (1994-11-01), Fung et al.
patent: 6049018 (2000-04-01), Calabro et al.
patent: 4115263 (1992-11-01), None
patent: 0149508 (1985-07-01), None
patent: 149508 (1985-07-01), None
patent: 764338 (1956-12-01), None
patent: 1395114 (1975-05-01), None
Database Caplus online!; Chemical Abstracts Service, Columbus, Ohio, Isakov, Ya. I. Et al “Catalytic conversion of aromatic hydrocarbons in the presence of syntheti zeolites under atmospheric pressure” Database accession no. 68:29340; XP002207048 abstract & NEFTEKHIMIYA (1967), 7(4), 561-8.
Tsai, T: “Cumene disproportionation over zeolite beta I. Comparison of catalytic performances and reaction mechanisms of zeolites” Appl. Cat., vol. 77, 1991, pp. 199-207, XP001093860 tables.
A.I. Biaglow: “A probe of Bronsted site acidity in zeolites: 13C chemical shift of acetone” Journal of Catalysis, vol. 148, 1994, pp. 779-786, XP002207047, p. 780; table 1.

Affiliated with

Also associated with

Rating

Production of diisopropylbenzene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Production of diisopropylbenzene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of diisopropylbenzene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3450163