Conversion of hydrocarbons

The synthesis of alkyl benzenes product from a feedstock of benzene and having a lower degree of ring alkylation than said product, which comprises contacting said hydrocarbon with a catalyst comprising a zeolite composition of alumina and silica having a relatively uniform pore diameter, in the absence of any hydrogenating catalytic component, and at reaction conditions effective to form said alkyl benzenes having a higher degree of ring alkylation than said feedstock.

The method for increasing the content of alkylbenzenes and decreasing the content of benzene in a hydrocarbon stream without substantially decreasing its boiling point which comprises contacting said stream with a catalyst comprising a zeolitic, metallo aluminosilicate having a relatively uniform pore diameter, in the absence of any hydrogenating catalytic component, and at reaction conditions effective to convert said benzene to alkylbenzenes.

The method for increasing the degree of alkylation of an aromatic hydrocarbon without substantially decreasing its boiling point which comprises contacting said hydrocarbon with a catalyst comprising a zeolitic, metallo aluminosilicate having a relatively uniform pore diameter, in the absence of any hydrogenating catalytic component, and at reaction conditions effective to crack the nucleus of some of the aromatics into alkyl fragments and alkylate remaining aromatics with said fragments.

In a cyclic method wherein a catalyst is alternately subjected to hydrocarbon cracking of a charge-stock comprising paraffins and aromatic hydrocarbons at cracking temperatures of at least 180.degree. C and to catalyst regeneration, the improvement of carrying out said cracking in the presence of a crystalline aluminosilicate catalyst having a silica to alumina ratio of at least 10.