Method of preparing benzene and methylbenzenes

Details Method of preparing benzene and methylbenzenes Method of preparing benzene and methylbenzenes

1975-07-08

1977-07-26

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 362

Patent

active

040383350

ABSTRACT:
A method of preparing benzene and methylbenzenes which comprises heat-treatment of toluene at a temperature of from 350.degree. to 500.degree. C under 1 to 50 atm pressure in the presence of a granulated zeolite catalyst. The latter contains cations of metals of Group II of the periodic system with an exchange degree of 5-30% of the theoretical; hydrogen group with an exchange degree of 6-22% of the theoretical and at least one of two components: the former - cations of metals of Group III of the periodic system with an exchange degree of 20-80% of the theoretical, the latter - cations of transition metals of Period IV of the periodic system with an exchange degree of 24 to 73% of the theoretical. This heat-treatment results in a reaction mixture I containing benzene and xylenes, wherefrom benzene and xylenes are separated. The separated xylenes are heat-treated under the above-mentioned conditions to form a reaction mixture 2 containing toluene and trimethylbenzenes. Toluene and trimethylbenzenes are separated from the reaction mixture 2 and trimethylbenzenes are heat-treated under the above-mentioned conditions to form a reaction mixture 3 containing xylenes and tetramethylbenzenes which are then separated from said mixture.
In this method a total conversion of the starting hydrocarbons to disproportionation products is 40 to 55% which corresponds to 70-95% of the equilibrium.

REFERENCES:
patent: 3597491 (1971-08-01), Kovach et al.
patent: 3679769 (1972-07-01), Kmecak et al.
patent: 3780121 (1973-12-01), Suggitt et al.
patent: 3784621 (1974-01-01), Suggitt

Affiliated with

Also associated with

Rating

Method of preparing benzene and methylbenzenes does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-726404