Claims
- 1. A hydrodehalogenation process, comprising the step of reacting a saturated halohydrocarbon with hydrogen or a hydrogen donor in the presence of a catalyst which consists of ruthenium on a support and at temperatures of at least about 100 degrees Celsius, whereby one or more halogens are removed from the saturated halohydrocarbon to produce reaction products including a corresponding non-halogenated olefin.
- 2. A process as defined in claim 1, wherein the saturated halohydrocarbon is 1,2-dichloropropane, and wherein the 1,2-dichloropropane is converted to reaction products including propylene.
- 3. A process as defined in claim 2, wherein 1,2-dichloropropane is reacted with hydrogen in the gas phase at a pressure of from 0 to about 1500 psig and at a temperature from about 100 to about 350 degrees Celsius, and further wherein the catalyst contains from about 0.01 to about 5 weight percent of ruthenium.
- 4. A process as defined in claim 3, wherein the reaction is conducted at a pressure of from 0 to about 100 psig and a temperature of from about 275 to about 300 degrees Celsius, and further wherein the catalyst contains from about 0.1 to about 1.0 percent by weight of ruthenium.
- 5. A process as defined in claim 4, wherein the reaction is conducted at about atmospheric pressure and a temperature of about 300 degrees Celsius, and further wherein the catalyst contains about 0.5 percent by weight of ruthenium.
- 6. A process as defined in claim 3, wherein the molar feed ratio of hydrogen to 1,2-dichloropropane is from about 0.5:1 to about 100:1.
- 7. A process as defined in claim 4, wherein the molar feed ratio of hydrogen to 1,2-dichloropropane is from about 2:1 to about 10:1.
- 8. A process as defined in claim 5, wherein the molar feed ratio of hydrogen to 1,2-dichloropropane is about 5:1.
- 9. A process as defined in claim 6, wherein the residence time associated with said reaction is between about 0.5 and about 20 seconds.
- 10. A process as defined in claim 7, wherein the residence time associated with said reaction is between about 2 and about 6 seconds.
- 11. A process as defined in claim 8, wherein the residence time associated with said reaction is about 4 seconds.
- 12. A process as defined in claim 9, wherein the support is alumina having a specific surface area of between 10 and 350 square meters per gram.
- 13. A process as defined in claim 10, wherein the support is alumina having a specific surface area of between 50 and 200 square meters per gram.
- 14. A process as defined in claim 1, wherein the support is alumina having a specific surface area of between 90 and 110 square meters per gram.
Parent Case Info
This application is a continuation of prior application Ser. No. 07/955,215, filed Oct. 1, 1992, now abandoned.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
2379697 |
Evans et al. |
Jul 1945 |
|
3892818 |
Scharfe et al. |
Jul 1975 |
|
4818368 |
Kalnes et al. |
Apr 1989 |
|
4899001 |
Kalnes et al. |
Feb 1990 |
|
5013424 |
James, Jr. et al. |
May 1991 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
4012007 |
|
DEX |
235630 |
May 1986 |
DEX |
3510034 |
Sep 1986 |
DEX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
955215 |
Oct 1992 |
|