Rejuvenation of deselectivated alkylation catalyst

Details Rejuvenation of deselectivated alkylation catalyst Rejuvenation of deselectivated alkylation catalyst

1983-05-12

1984-12-04

Konopka, P. E.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

502 28, 502 34, 502 77, 502 85, 585467, 585475, C07C 268, B01J 2938, B01J 2928

Patent

active

044866160

ABSTRACT:
A process for alkylation of aromatic hydrocarbon reactants to dialkylbenzene products, whereby chemically modified zeolite catalysts are treated with an organic acid to enhance their intrinsic para-selectivity in the alkylation reaction. The modified zeolites which may be so reselectivated or improved comprise those crystalline zeolites having a constraint index of 1 to 12, a silica to alumina mole ratio of at least 12, and having a minor proportion of the oxide form of one or more chemical elements (e.g. phosphorus and magnesium) deposited thereon.

REFERENCES:
patent: 3493490 (1970-02-01), Plank et al.
patent: 3684738 (1972-08-01), Chen
patent: 4001346 (1977-01-01), Chu
patent: 4002698 (1977-01-01), Kaeding
patent: 4011276 (1977-03-01), Chu
patent: 4088706 (1978-05-01), Kaeding
patent: 4098837 (1978-07-01), Chu
patent: 4128592 (1978-12-01), Kaeding
patent: 4137195 (1979-01-01), Chu
patent: 4420418 (1983-12-01), Chu

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