Claims
- 1. A process for the dehydrogenation of para-ethyltoluene to selectively form para-methylstyrene, said process comprising contacting a feed comprising para-ethyltoluene and steam under steam dehydrogenation reaction conditions with a catalyst composition comprising:
- a. from about 30% to 60% by weight of iron oxide, calculated as ferric oxide;
- b. from about 13% to 48% by weight of potassium compound, calculated as potassium oxide;
- c. from about 0% to about 5% of chromium compound, calculated as chromic oxide; and
- d. from about 1% to 15% by weight of a gallium compound, calculated as gallium trioxide.
- 2. A process for the dehydrogenation of para-ethyltoluene to selectively form para-methylstyrene, said process comprising contacting a feed comprising para-ethyltoluene and steam with a catalyst composition comprising:
- a. from about 30% to 60% by weight of iron oxide, calculated as ferric oxide;
- b. from about 13% to 48% by weight of potassium compound, calculated as potassium oxide;
- c. from about 0% to about 5% of chromium compound, calculated as chromic oxide; and
- d. from about 1% to 15% by weight of a gallium compound, calculated as gallium trioxide;
- said contacting occurring under steam dehydrogenation conditions which include a temperature of from about 500.degree. C. to 700.degree. C., a liquid hourly space velocity for para-ethyltoluene of from about 0.3 to 3 and a steam to hydrocarbon ratio in said feed of about 1:1 to 5:1.
- 3. A process in accordance with claim 2 wherein
- a. the iron oxide comprises from about 35% to 55% by weight of the catalyst composition;
- b. the potassium compound comprises from about 27% to 41% by weight of the catalyst composition;
- c. the chromium compound comprises from about 1% to 4% by weight of the catalyst composition; and
- d. the gallium compound comprises from about 2% to 10% by weight of the catalyst composition.
- 4. A process in accordance with claim 3 wherein the weight ratio of steam to para-ethyltoluene in the feed ranges from about 1.5:1 to 4:1.
- 5. A process in accordance with claim 2 wherein said catalyst composition additionally contains up to about 20% by weight of a binder/filler component selected from the group consisting of portland cement, calcium aluminate, sawdust, carbon, wood flour, graphite, methylcellulose and mixtures thereof.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a division of copending U.S. application Ser. No. 449,913, filed Dec. 15, 1982, the entire disclosure of which is expressly incorporated herein by reference.
US Referenced Citations (14)
Divisions (1)
|
Number |
Date |
Country |
Parent |
449913 |
Dec 1982 |
|