Processes for selective dehydrohalogenation of halogenated alkanes
First Claim
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1. A process for the production fluorinated olefin having from three to six carbon atoms, a degree of non-fluorine halogen substitution of a N−
- 1 and a degree of fluorine substitution of M, the process comprising;
exposing a fluorinated and chlorinated alkane having from two to six carbon atoms and a degree of non-fluorine halogen substitution of N and a degree of fluorine substitution of M to conditions effective to convert at least about 20% by weight of said alkane to said fluorinated olefin wherein the process is carried out in the presence of a catalyst comprising activated carbon having a total concentration of Al3+ of greater than zero to less than 8000 ppm and a total concentration of Fe3+ of greater than zero to less than 8000 ppm.
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Abstract
Disclosed are processes for producing halogenated olefins, and preferably tetrafluorinated propene(s), from one or more alkanes having both fluorine substituents and non-fluorine substituents, preferably with a high degree of conversion and selectivity. Preferably the process comprises the use of a catalyzed reaction in which the catalyst is selected from the group consisting of activated carbons halogenated mono- and di-valent metal oxides, mono- and di-valent Lewis acid metal halides, zero-valent metals, and combinations of these.
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32 Claims
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1. A process for the production fluorinated olefin having from three to six carbon atoms, a degree of non-fluorine halogen substitution of a N−
- 1 and a degree of fluorine substitution of M, the process comprising;
exposing a fluorinated and chlorinated alkane having from two to six carbon atoms and a degree of non-fluorine halogen substitution of N and a degree of fluorine substitution of M to conditions effective to convert at least about 20% by weight of said alkane to said fluorinated olefin wherein the process is carried out in the presence of a catalyst comprising activated carbon having a total concentration of Al3+ of greater than zero to less than 8000 ppm and a total concentration of Fe3+ of greater than zero to less than 8000 ppm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- 1 and a degree of fluorine substitution of M, the process comprising;
Specification