| 摘要 |
The invention concerns improved catalytic hydrofluorination of saturated or unsaturated organic compounds corresponding to the general formula CwHxClyFz (I) wherein w is an integer ranging between 1 and 6, x is an integer ranging between 0 and (2w+1) or between 0 and (2w-1), y is an integer ranging between 1 and (2w+1) or between 1 and (2w-1), z is an integer ranging between 0 and (2w+1) or between 0 and (2w-1) and the sum (x + y + z) has the value (2w + 2) comprising a continuous supply of hydrogen chloride. The invention also concerns a method for preparing 1,1,1,3,3-pentachloropropane starting with 1,1,1,3,3-pentachloropropane comprising two catalytic reaction steps whereby preferably hydrogen chloride is continuously supplied into the reaction medium for at least one of the two reaction steps.
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