Method of oxydehydrogenation of alkyl aromatic compounds
AssigneeThe Dow Chemical Company
InventorsG. Edwin Vrieland, Hans R. Friedli
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Abstract
Certain alkaline earth pyrophosphates, such as Ca, Mg, and Sr pyrophosphates are superior catalysts for oxydehydrogenating alkyl aromatic compounds including nitrogen heterocyclics which have at least one C.sub.2 -C.sub.6 alkyl side chain to form derivatives having side chain unsaturation. The alkyl aromatic compound can have 1-2 rings. The process is carried out at 450.degree.-650.degree.C. and a space velocity of 55-2500.
Claims14
A method of dehydrogenating an alkyl aromatic compound, selected from the class consisting of ethyl benzene, ethyl toluene, t-butyl ethyl benzene, diethyl benzene, ring chlorinated or brominated ethyl benzene, ethyl naphthalene, ethyl phenol, and isopropyl benzene to form a derivative having aliphatic unsaturation in the side chain, comprising passing a mixture of said alkyl aromatic compound and an oxygen containing gas in a mole ratio of 0.5 to 4.0 moles oxygen per mole of alkyl aromatic compound, over at least one of calcium, magnesium or strontium pyrophosphate, at a temperature from about 450.degree. to about 650.degree.C.
Dependencies are inferred from the claim text.