| 摘要 |
<p>1,135,831. Manufacture of aromatic vinyl aldehydes and nitriles. STANDARD OIL CO. 6 Jan., 1966 [6 Jan., 1965], No. 676/66. Heading C2C. Aromatic vinyl aldehydes or nitriles of the formula wherein R<SP>11</SP> and R<SP>111</SP> are always different and each represents hydrogen, a-CN or a-CHO group, at least one of R<SP>11</SP> and R<SP>111</SP> being always hydrogen and the other being -CN or -CHO, and wherein Ar is phenyl, naphthyl, anthryl or phenanthryl are obtained by reacting a monoolefinically substituted aromatic hydrocarbon of the formula wherein R and R<SP>1</SP> are always different and each represents hydrogen or a methyl group, with (a) oxygen to form the corresponding aldehyde, or (b) a mixture of ammonia and oxygen to form the corresponding nitrile, over a catalyst comprising at least one polyvalent metal oxide or salt at a temperature within the range 300- 800‹ C. The catalyst, which may be used alone or supported on, or impregnated in, a carrier material, may also include further metal oxides as promoters, and the process is suitably carried out at a pressure of 1 to 3 atmospheres gauge. Many catalyst systems are described but a preferred catalyst system comprises antimony and uranium oxides, optionally together with a metal oxide promoter; in the specific examples using such catalyst systems, atroponitrile, atropaldehyde, cinnamaldehyde and cinnamonitrile are prepared, by-products such as benzonitrile, benzaldehyde and quinoline also being formed.</p> |
