Claims
- 1. A process for preparing a catalyst of a chromium oxide supported on a silica of high pore volume which comprises forming a hydrogel of said silica, replacing the aqueous phase of said hydrogel by a water miscible organic liquid to form an organosilica gel, suspending said organosilica gel as a slurry in a water miscible organic liquid, adding to said slurry an aqueous solution of chromic nitrate nonahydrate, evaporating liquid from said slurry, and heating to decompose said chromic nitrate nonahydrate.
- 2. A process according to claim 1 wherein said water miscible organic liquids are acetone.
- 3. A process according to claim 1 wherein the solvent of said aqueous solution is constituted by a major proportion of a water miscible organic liquid and at least 6% of water.
- 4. A process according to claim 3 wherein the organic liquid of said solvent is acetone.
- 5. A process for preparing a catalyst of a chromium oxide supported on a silica of high pore volume which comprises forming a xerogel of said silica, suspending said xerogel as a slurry in a water miscible organic liquid, adding to said slurry an aqueous solution of chromic nitrate nonahydrate, evaporating liquid from said slurry, and heating to decompose said chromic nitrate nonahydrate.
- 6. A process according to claim 5 wherein said water miscible organic liquid is acetone.
- 7. A process according to claim 5 wherein the solvent of said aqueous solution is constituted by a major proportion of a water miscible organic liquid and at least 6% of water.
- 8. A process according to claim 7 wherein the organic liquid of said solvent is acetone.
- 9. A process for preparing a solution of chromic nitrate nonahydrate in a solvent constituted by a major proportion of a water miscible organic liquid and suitable for impregnation of a porous silica support which comprises wetting said chromic nitrate nonahydrate with a minor amount of water and adding to the wetted chromic nitrate nonahydrate a quantity of water miscible liquid greater than the water content of said wetted chromic nitrate nonahydrate.
- 10. A process according to claim 9 wherein said organic liquid is acetone.
- 11. A process for preparing a catalyst of chromium oxide supported on a silica gel of high pore volume which comprises forming a silica hydrogel, replacing the aqueous phase of said hydrogel by acetone to form an organogel, suspending said organogel as a slurry in acetone, adding to said slurry a solution of chromic nitrate nonahydrate in acetone which contains a minor amount of water, evaporating liquid from said slurry, and heating to decompose said chromic nitrate nonahydrate.
Parent Case Info
This is a continuation of applicaton Ser. No. 111,744, filed Jan. 14, 1980, now abandoned.
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Number |
Name |
Date |
Kind |
3652215 |
Aboutboul et al. |
Mar 1972 |
|
3867306 |
Witt et al. |
Feb 1975 |
|
4037042 |
Mueller-Tamm et al. |
Sep 1977 |
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4246139 |
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4299731 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
111744 |
Jan 1980 |
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