Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Patent
1981-07-24
1983-07-12
Konopka, P. E.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
252416, 2524552, 585640, C07C 124, C07C 120, B01J 2938, B01J 2906
Patent
active
043932657
ABSTRACT:
Process of preparing light monoolefins by:
(a) activating a hydrogen-exchanged aluminosilicate catalyst having a silica to alumina ratio of less than 12 and, optionally, containing added metal cations, by treating with steam at a temperature of at least 400.degree. C., preferably 450.degree. to 520.degree. C.;
(b) contacting the steam-activated catalyst in a reaction zone, at a temperature of about 350.degree. to about 600.degree. C., preferably 450.degree. to 520.degree. C., with a gas stream consisting essentially of dimethyl ether or a mixture of methanol and dimethyl ether, as reactant, and sufficient water such that the mole ratio of water to ether in the reaction zone is at least 0.3; at a pressure of about 0.2 to about 30 atmospheres (about 20 to about 3000 kPa), preferably atmospheric pressure (100 kPa), and at a weight hourly space velocity (WHSV) of greater than about 0.5 h.sup.-1, preferably 1 to 150 h.sup.-1, to convert at least 85 wt % of the reactant to hydrocarbons comprising at least 50 wt % ethylene and propylene, said 85% conversion being achieved before the contacting has exceeded 1 g of reactant per g of catalyst, preferably before exceeding 0.3 g of reactant per g of catalyst, more preferably before exceeding 0.1 g of reactant per g of catalyst until the catalyst is spent; and
(c) regenerating the spent catalyst with a mixture comprising steam and oxygen at a temperature of at least 400.degree. C., preferably 450.degree. to 520.degree. C.
REFERENCES:
patent: 3257310 (1966-06-01), Plank et al.
patent: 3407148 (1968-10-01), Eatwood et al.
patent: 3428550 (1969-02-01), Erickson et al.
patent: 3911041 (1975-10-01), Kaeding et al.
patent: 4025575 (1977-05-01), Chang et al.
patent: 4025576 (1977-05-01), Chang et al.
patent: 4052479 (1977-10-01), Chang et al.
patent: 4062905 (1977-12-01), Chang et al.
patent: 4066714 (1978-01-01), Rodewald
patent: 4079095 (1978-03-01), Givens et al.
patent: 4079096 (1978-03-01), Givens et al.
patent: 4083888 (1978-04-01), Caesar et al.
patent: 4083889 (1978-04-01), Caesar et al.
patent: 4148835 (1979-04-01), Chen et al.
patent: 4172856 (1979-10-01), Spencer et al.
patent: 4197214 (1980-04-01), Chen et al.
patent: 4229608 (1980-10-01), Chen et al.
patent: 4238631 (1980-12-01), Daviduk et al.
patent: 4247731 (1981-01-01), Wunder et al.
patent: 4296266 (1981-10-01), Wunder et al.
B. B. Singh et al., Chem. Eng. Comm., 4, 749 (1980).
W. W. Kaeding and S. A. Butter, J. Catalysis 61, 155 (1980).
R. G. Anthony and B. B. Singh, Chem. Eng. Comm. 6, 215 (1980).
E. I. Du Pont de Nemours & Co.
Konopka P. E.
LandOfFree
Light monoolefins from methanol and/or dimethyl ether does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light monoolefins from methanol and/or dimethyl ether, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light monoolefins from methanol and/or dimethyl ether will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-200018