Process for selective dealkylation of alkyl-substituted aromatic

Details Process for selective dealkylation of alkyl-substituted aromatic Process for selective dealkylation of alkyl-substituted aromatic

1980-02-04

1982-03-16

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By dealkylation

208111, C07C 412

Patent

active

043202420

ABSTRACT:
In a process for dealkylating a hydrocarbon material containing at least one alkyl-substituted aromatic hydrocarbon having bonded to the aromatic ring at least one alkyl group with at least 2 carbon atoms in the gaseous phase in the presence of hydrogen using a hydro-dealkylation catalyst, the improvement wherein (a) said hydro-dealkylation catalyst is composed of a crystalline aluminosilicate having a silica/alumina mole ratio of from 20 to 200 and containing a noble metal selected from platinum, palladium, rhodium and iridium, and (b) said dealkylation is carried out at a temperature of 250.degree. C. to 420.degree. C. and a pressure of not more than 100 psig, thereby selectively removing said alkyl group containing at least 2 carbon atoms from said alkyl-substituted aromatic hydrocarbon.

REFERENCES:
patent: 4101595 (1978-07-01), Chen et al.

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