Novel catalyst for dealkylating alkyl benzenes and fractions of

Details Novel catalyst for dealkylating alkyl benzenes and fractions of Novel catalyst for dealkylating alkyl benzenes and fractions of

1979-06-18

1981-09-08

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252464, 252465, 252466PT, 252466B, 585487, B01J 2702, B01J 2314, B01J 2316, B01J 2362

Patent

active

042883474

ABSTRACT:
A catalyst for dealkylating alkyl benzenes and fractions of aromatized benzines by means of steam conversion is disclosed. The catalyst comprises rhodium or rhodium in a mixture with another noble metal from Group VIII of the Periodic System in an amount of 0.1 to 2 wt. % on a carrier of aluminum oxide and also at least one of the elements selected from the group consisting of sulfur, selenium or lead in an amount of 0.003 to 3 wt. %. To increase the yield of the final product, the catalyst also comprises at least one element selected from the group containing iron, cobalt, nickel, chrome, copper, and vanadium in an amount of 0.01 to 5 wt. %, and at least one of the elements of the alkaline or alkaline earth metals or mixtures thereof in an amount of 0.01 to 5 wt. %.
The proposed catalyst features a high degree of selectivity for dealkylating alkyl benzenes in combination with a high degree of starting feed conversion.

REFERENCES:
patent: 3291720 (1966-12-01), Dobres et al.
patent: 3436433 (1969-04-01), Lester
patent: 3436434 (1969-04-01), Lester
patent: 3649565 (1972-03-01), Wilhelm
patent: 3649707 (1972-03-01), Lester
patent: 3840389 (1974-10-01), Kobylinski et al.
patent: 4053389 (1977-10-01), Wilhelm
patent: 4199436 (1980-04-01), Courty

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