Preparation of alkenyl aromatic compounds
AssigneeThe Standard Oil Company
InventorsLouis J. Velenyi, Serge R. Dolhyj, Andrew S. Krupa
Life of this patent
Estimating the term…
Abstract
Cyclohexenyl and alkenyl aromatic compounds, such as cyclohexene and styrene, are prepared by a process comprising contacting a corresponding cyclohexyl or alkyl aromatic carboxylic acid, such as cyclohexyl carboxylic acid or 2-phenyl propionic acid, with a decarboxylation catalyst of the formula M.sub.a M'.sub.b O.sub.x where M is copper or a combination of copper and molybdenum, and M' is at least one promoter element, such as a Group IA element.
Claims10
A process for preparing an alkenyl aromatic compound, the process comprising contacting a corresponding alkyl aromatic carboxylic acid with a decarboxylation catalyst of the formula
- M.sub.a M'.sub.b O.sub.x (I)
- where
- M is copper or a combination of copper and molybdenum;
- M' is at least one of sodium, potassium, rubidium, cesium, chromium, phosphorus, a Group VIII metal, tin and bismuth;
- a is a number of about 0.1 to 1;
- b is a number of about 0.01 to 0.5;
- and
- x is the number of oxygen atoms determined by the valence requirement of the other elements present.
A process for preparing an alkenyl aromatic compound, the process comprising contacting a corresponding alkyl aromatic carboxylic acid of the formula ##STR4## where R is an inert substituent;
- R' is hydrogen, C.sub.1 -C.sub.4 alkyl or a --COOH radical;
- R" and R"' are independently R', phenyl or inertly-substituted phenyl radicals;
- m is 1 or 2, and
- n is 0-4;
- with the provisoes that
- (i) one but only one of R', R" and R"' is a --COOH radical, and
- (ii) when either R" and R"' is a phenyl or an inertly-substituted phenyl radical, the other is neither a phenyl or an inertly-substituted phenyl radical;
- with a decarboxylation catalyst of the formula
- M.sub.a M'.sub.b O.sub.x (I)
- where
- M is a combination of copper and molbydenum;
- M' is at least one of sodium, potassium, cesium, tin and bismuth;
- a is a number of about 0.1 to 1;
- b is a number of about 0.01 to 0.5;
- and
- x is the number of oxygen atoms determined by the valence requirement of the other elements present.
Dependencies are inferred from the claim text.