Alkylation/transalkylation process

Details Alkylation/transalkylation process Alkylation/transalkylation process

1988-09-21

1989-08-15

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585466, 585474, 585475, C07C 100, C07C 268, C07C 522

Patent

active

048576662

ABSTRACT:
An alkylation-transalkylation process for the production of a monoalkylated aromatic compound is disclosed which maximizes the production of desirable monoalkylaromatic compounds, while limiting transalkylation catalyst deactivation. The process entails the combination of an alkylation reaction zone, a first seperation zone, a second separation zone, and a transalkylation reaction zone wherein the alkylation catalyst and transalkylation catalyst are dissimilar and where the alkylation catalyst is comprised of phosphoric acid material and the transalkylation catalyst is comprised of a crystalline aluminosilicate material. The transalkylation catalyst deactivation is reduced by transalkylating only dialkylated aromatic compounds. Additionally, the transalkylation catalyst is regenerable utilizing a hot liquid hydrocarbon wash.

REFERENCES:
patent: 3655813 (1972-04-01), Kirsch et al.
patent: 3671423 (1972-06-01), MacDonald et al.
patent: 3772211 (1973-11-01), Mounce
patent: 3795714 (1974-03-01), Pickert et al.
patent: 3851004 (1974-11-01), Yang
patent: 4550090 (1985-10-01), Degman et al.

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