Catalysts for para-ethyltoluene dehydrogenation
Patent 4496662 Issued on January 29, 1985. Estimated Expiration Date: 
December 23, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 23, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 06/452471 filed on 12/23/1982US Classes:502/183, Of Group II (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/243, Of Group I (i.e., Alkali, Ag, Au or Cu)502/306, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/328, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)585/444, Using metal oxide, sulfide, or salt585/445Cr-, Mo-, or W-containingExaminersPrimary: Shine, W. J.Attorney, Agent or FirmInternational ClassesC07C 5/333 (20060101)C07C 5/00 (20060101) B01J 23/86 (20060101) B01J 23/76 (20060101) AbstractPara-ethyltoluene dehydrogenation catalyst compositions and processes for using such catalysts are provided. The catalyst compositions comprise a catalytically active iron compound, e.g., iron oxide; a potassium catalyst promoter, e.g., potassium carbonate; an optional chromium compound stabilizer, e.g., chromic oxide, and a magnesium compound, e.g., magnesium oxide. Utilization of particular amounts of magnesium compound in dehydrogenation catalyst compositions of this type will provide a catalyst especially suitable for promoting the selective dehydrogenation of para-ethyltoluene to form para-methylstyrene in improved yields. |
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