Claims
- 1. A process for the preparation of cyclohexane-1,3-dione consisting essentially of reacting, in the gaseous phase, a .delta.-ketohexanoic acid ester of the formula ##STR3## wherein R' is an alkyl having 1 to 4 carbon atoms at a temperature of from 250.degree. C. to 500.degree. C. in the presence of an impregnated catalyst consisting essentially of a catalytic carrier impregnated with a compound of an active component selected from the group consisting of lanthanum, zirconium, cerium and thorium.
- 2. The process of claim 1 wherein the .delta.-ketohexanoic acid ester is .delta.-ketohexanoic acid methyl ester.
- 3. The process of claim 1 wherein the active component of said impregnated catalyst is thorium.
- 4. The process of claim 1 wherein the catalytic carrier is carbon.
- 5. The process of claim 1 wherein the catalytic carrier is impregnated with 0.05% to 10%, relative to the catalyst weight, of said active component.
- 6. The process of claim 1 wherein the .delta.-ketohexanoic acid ester is diluted by adding 3 to 20 times the amount of an equimolar mixture of nitrogen and hydrogen or nitrogen and an ethylene-glycol ether.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2825170 |
Jun 1978 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 46,098 filed June 6, 1979 and now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3932511 |
Schaafsma et al. |
Jan 1976 |
|
4041049 |
Muller et al. |
Aug 1977 |
|
4154965 |
Meijer et al. |
May 1979 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
46098 |
Jun 1979 |
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