Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-12-07
1983-02-22
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252456, 252464, B01J 2382, B01J 2100
Patent
active
043747590
ABSTRACT:
A catalyst composition useful for the oxidation of olefins, particularly the vapor phase oxidation of isobutylene and/or tertiary butyl alcohol to produce methacrolein, consists essentially of the combination of oxides of molybdenum, cobalt, iron, bismuth, thallium, antimony, silicon, and nickel, along with one or more members of the groups consisting of the alkali metals, the alkaline earth metals, the rare earth metals including lanthanum, tungsten, and mixtures thereof. The catalyst has a BET surface area within the range of about 0.5-10 m.sup.2 /gm and preferably within the range of about 2-6 m.sup.2 /gm. Preferably, the catalyst has no more than about 3% of the surface area associated with pores smaller than about 100 A.degree.. The catalyst is heated during its preparation to a temperature above 525.degree. C., preferably above 550.degree. C., most preferably to about 600.degree. C., for a time sufficient to achieve the desired surface area and pore size distribution and thereby to improve selectivity to methacrolein.
REFERENCES:
patent: 4035418 (1977-07-01), Okada et al.
patent: 4087382 (1978-05-01), Khoobiar
patent: 4111984 (1978-09-01), Ishii et al.
Dees Carl F.
Long William C.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
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