Claims
- 1. A process for the activation of noble metal catalyst selected from the group consisting of ruthenium, rhodium, palladium, indium and platinum and/or a combination thereof supported on supports selected from carbon, fluorided alumina, aluminum fluoride and calcium fluoride, used as a catalyst for fluorohalocarbon hydrodechlorination or fluorohalohydrocarbon hydrodechlorination, comprising contacting said catalyst at a temperature in excess of 200.degree. C. with an atmosphere containing a fluorohalocarbon or fluorohalohydrocarbon of the formula C.sub.n H.sub.m F.sub.p X.sub.q, wherein X is a chlorine and/or bromine; n is an integer from 1 to 6; m is an integer from 0 to 6, provided that m can be no more than the total n in the compound; p and q are integers from 1-13 when the compound is acyclic, and integers from 1-11 when the compound is cyclic, provided that the fluorohalocarbon and/or fluorohalohydrocarbon always contain at least one chlorine or bromine atom and provided that m+p+q=2n+2 when the compound is acyclic and that m+p+q=2n when the compound is cyclic, in the substantial absence of hydrogen and in the absence of air and/or oxygen, for a period in excess of 15 minutes.
- 2. Process of claim 1 wherein the temperature range is 225.degree. C. to 350.degree. C.
- 3. Process of claim 2 wherein said contacting of the catalyst with said fluorohalocarbon or fluorohalohydrocarbon is for a period in excess of 15 minutes.
- 4. Process of claim 3 where the said contacting of the catalyst with said fluorohalocarbon or fluorohalohydrocarbon is for a three to four hour period.
- 5. The process of claim 1 wherein the catalysts are supported on carbon supports.
- 6. The process of claim 1 wherein the noble metal is palladium.
- 7. The process of claim 2 wherein fluorochlorocarbons are used in the contacting process.
- 8. The process of claim 2 wherein fluorochlorobromocarbons are used in the contacting process.
- 9. Process of claim 7 wherein the number of carbon atoms in the fluorochlorocarbon, n, is 1 to 3.
- 10. The process of claim 1 wherein gases selected from nitrogen, helium and argon and/or mixtures thereof are present.
- 11. The process of claim 1 carried out in a batch reactor.
- 12. The process of claim 1 carried out in a fixed-bed reactor.
- 13. The process of claim 1 wherein the fluorohalocarbon or fluorohalohydrocarbon represented by the formula C.sub.n H.sub.m F.sub.p X.sub.q has n of 1 to 3, m of 0 to 4, p of 1 to 7 and q of 1 to 7.
- 14. The process of claim 1 wherein fluorobromocarbons are used in the contacting process.
Parent Case Info
This is a request for filing a continuation under 37 CFR 1.60, of pending prior application Ser. No. 07/412,326, filed on Sept. 25, 1989, now U.S. Pat. No. 4,980,324.
US Referenced Citations (10)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0316727 |
May 1989 |
EPX |
2009114 |
Sep 1971 |
DEX |
87693 |
Jul 1979 |
JPX |
196742 |
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JPX |
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Non-Patent Literature Citations (1)
Entry |
Franck et al., "Progress in Catalist Deactivation", ed. by Figueiredo Martinus Nishoff, The Hague--1982, p. 386ff. |
Continuations (1)
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Number |
Date |
Country |
Parent |
412326 |
Sep 1989 |
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