Method and catalyst for preparing styrene
OwnerSergei A. Polyakov, Aron L. Shapiro +1inventors
InventorsSergei A. Polyakov, Aron L. Shapiro, Viktor J. Gankin
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Abstract
A method and catalyst for preparing styrene which comprises dehydrodimerization of toluene, followed by conversion of the resulting dehydrodimerization products to styrene. The conversion is conducted in the presence of ethylene using a catalyst consisting of chromium oxide, tungsten oxide and an alkali metal oxide supported by a carrier. The method according to the present invention makes it possible to increase the yield of styrene and simplify the process technology.
Claims1
A method for preparing styrene which comprises dehydrodimerization of toluene with a subsequent catalytic conversion of the resulting dehydrodimerization products to styrene at a temperature ranging from 300.degree. to 600.degree. C. in the presence of ethylene using a catalyst consisting of the following components, percent by weight:
- ______________________________________ chromium oxide 1.5 to 5.2 tungsten oxide 4.0 to 6.1 an oxide of an alkali metal 0.1 to 0.7 ______________________________________
- a carrier selected from the group consisting of silica and alumosilicate the balance.
Dependencies are inferred from the claim text.