Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By dehydrogenation
Patent
1985-07-25
1986-10-28
Doll, John
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By dehydrogenation
585651, 585653, 585661, C07C 5333
Patent
active
046200517
ABSTRACT:
A method of selectively cracking C.sub.3 and C.sub.4 hydrocarbons to C.sub.2 hydrocarbons, particularly ethylene, in which a body of cracking catalyst is established in a reaction zone and the feed hydrocarbons are passed through the body of catalyst while maintaining the conditions sufficient to convert the feed hydrocarbons to product hydrocarbons, including, a temperature in the upstream end of the body of catalyst at least about 100.degree. C. below the temperature in the downstream end of the body of catalyst. The cracking catalyst is preferably selected from the group consisting of: at least one oxide of manganese and at least one oxide of magnesium; at least one oxide of manganese and at least one oxide of at least one metal selected from the group consisting of Lanthanum Series metals, preferably lanthanum or cerium, and niobium; at least one oxide of iron and at least one oxide of magnesium; and at least one oxide of iron and at least one oxide of a Lanthanum Series metals or niobium. The active life of the catalyst, for the selective conversion to C.sub.2 hydrocarbons and particularly ethylene, is extended by adding promoting amounts of oxides of calcium, strontium, barium, tin or antimony or oxides of silicon, aluminum or titanium or chromium to certain of the basic catalysts. Manganese may also be added to the catalysts containing iron oxide. The addition of steam, during the conduct of the process, also extends the active life of the catalyst and may, optionally, be utilized with the catalysts free of oxides of iron and is essential to operation with catalysts containing oxides of iron.
REFERENCES:
patent: 2415477 (1947-02-01), Folkins et al.
patent: 3644557 (1972-02-01), Senes et al.
patent: 3751514 (1973-08-01), Hoppstock et al.
patent: 3751516 (1973-08-01), Frech et al.
patent: 3766278 (1973-10-01), Bogart et al.
patent: 4087350 (1978-05-01), Kolombos et al.
patent: 4093536 (1978-06-01), Heckelsberg
patent: 4152300 (1979-05-01), Riesser
patent: 4159970 (1979-07-01), Heckelsberg
patent: 4471151 (1984-09-01), Kolts
Delzer Gary A.
Kolts John H.
Doll John
Johnson Lance
Philips Petroleum Company
Steininger C. F.
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