B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/15, 260/684,
B01J 29/06 (2006.01) B01J 29/40 (2006.01) C07C 2/00 (2006.01) C07C 2/66 (2006.01) C07C 2/76 (2006.01) C07C 2/86 (2006.01) C07C 4/00 (2006.01) C07C 5/41 (2006.01) B01J 29/65 (2006.01) B01J 29/70 (2006.01)
Patent
CA 1086707
ABSTRACT OF THE DISCLOSURE A catalyst particularly applicable for the selective production of para dialkyl substituted benzenes is provided comprising a porous crystalline aluminosilicate zeolite which has undergone modification by deposition thereon of a coating of silica extensively covering, and residing substantially exclusively on the external surface thereof as a result of contact with a silicone compound of a molecular size incapable of entering the pores of the zeolite and subsequent heating in an oxygen-containing atmosphere to a temperature in excess of 300°C. but below a temperature at which crystallinity of the zeolite is adversely affected at a rate such that the silicone compound does not volatilize prior to undergoing oxidation to silica. The zeolite is characterized by an activity, in terms of alpha value, of between about 2 and about 5000, a xylene sorption capac- ity greater than 1 gram/100 grams of zeolite and an ortho-xylene sorption time of 30 percent of said capacity of greater than 10 minutes, said sorption capacity and sorption time being measured at 120°C. and a xylene pressure of 4.5 ? 0.8 mm. of mercury. There is also provided a process for the selective production of para dialkyl substituted benzenes containing alkyl groups of 1 to 4 carbon atoms, typified by para-xylene, by contacting, under conversion conditions, a hydrocarbon precursor selected from the group consisting of mono alkyl-sub- stituted benzes having 1-4 carbon atoms in the alkyl substi- tuent, e.g. toluene, ethyl benzene, propyl benzene or butyl benzene and a mixture of said precursor or benzene with an alkylating agent containing from 1 to 4 carbon atoms with the above catalyst and recovering from the resulting product mixture, a para dialkyl substituted benzene in an amount greater than the thermodynamic equilibrium concentration thereof in the total dialkyl substituted benzenes produced.
274658
Kirby Eades Gale Baker
Mobil Oil Corporation
LandOfFree
Catalyst and process for selective production of para... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst and process for selective production of para..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst and process for selective production of para... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-283458