Process for the production of chlorinated and fluorinated alkanes and alkenes in the presence of a catalyst
DCFirst Claim
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1. A process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243 db), which process comprises (i) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
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Abstract
The invention provides a process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243db), which process comprises contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
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56 Claims
- 1. A process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243 db), which process comprises (i) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
- 4. A process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243 db) comprising the step of converting 1,1,1,3-tetrachloropropane (250fb) to produce 3,3,3-trifluoropropene (1243zf), and contacting the 1243zf with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
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5. A process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243 db)—
- comprising the steps (a) of telomerising ethylene and carbon tetrachloride (CCl4) to produce 1,1,1,3-tetrachloropropane (250fb), (b) converting the 250fb to produce 3,3,3-trifluoropropene (1243zf), and contacting the (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
- View Dependent Claims (6, 7, 8, 9, 10)
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15. A process comprising the steps of
(i) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal to produce 1,1,1-trifluoro-2,3-dichloropropane (243 db); - and
(ii) contacting the 243 db with hydrogen fluoride (HF) in the presence of a fluorination catalyst to produce the compound of formula CF3CHFCH2X, wherein X is Cl or F. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A process comprising the steps of:
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(w) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst comprising activated carbon, alumina and/or an oxide of a transition metal to produce 1,1,1-trifluoro-2,3-dichloropropane (243 db); and (x) converting the 243 db to 3,3,3-trifluoro-2-chloroprop-1-ene (CF3CCl═
CH2, 1233xf). - View Dependent Claims (29, 30, 42, 43)
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31. A process comprising the steps of
(w) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal to produce 1,1,1-trifluoro-2,3-dichloropropane (243 db); -
(x) converting 243 db to 3,3,3-trifluoro-2-chloroprop-1-ene (CF3CCl═
CH2, (1233xf); and(y) contacting the 1233xf with a fluorinating agent to produce a compound of formula CF3CFXCH3, wherein X=Cl or F. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 44)
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45. A process comprising the steps of
(w) contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal to produce 1,1,1-trifluoro-2,3-dichloropropane (243 db); -
(x) converting 243 db to 3,3,3-trifluoro-2-chloroprop-1-ene (CF3CCl═
CH2, (1233xf);(y) contacting the 1233xf with a fluorinating agent to produce a compound of formula CF3CFXCH3, wherein X=Cl or Fl; and (z) dehydrohalogenating the compound of formula CF3CFXCH3 to produce 1234yf. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification