Azeotropic compositions of 2-chloro-3,3,3-trifluoro-1-propene with hf and of 1,1,1,2,2-pentafluoropropane with hf

Abstract

A process is disclosed for making CF 3 CH 2 CHF 2 , CF 3 CH═CHF and/or CF 3 CH═CHCl. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX 3 CHClCH 2 X, halopropenes of the formula CX 3 CCl═CH 2 and halopropenes of the formula CX 2 ═CClCH 2 X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCl, CF 3 CH 2 CHF 2 , CF 3 CH═CHF and CF 3 CH═CHCl; and recovering the CF 3 CH 2 CHF 2 , CF 3 CH═CHF and/or CF 3 CH═CHCl from the product mixture. Also disclosed is a process for making CF 3 CF 2 CH 3 and/or CF 3 CF═CH 2 . The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX 3 CHClCH 2 X, halopropenes of the formula CX 3 CCl═CH 2 and halopropenes of the formula CX 2 ═CClCH 2 X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCl, CF 3 CF 2 CH 3 and CF 3 CF═CH 2 ; and recovering the CF 3 CF 2 CH 3 and/or CF 3 CF═CH 2 from the product mixture. In each of the processes the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric. Also disclosed is an azeotropic composition comprising CF 3 CCl═CH 2 , and HF. Also disclosed is an azeotropic composition comprising CF 3 CF 2 CH 3 , and HF.

1 . A process for making at least one product compound selected from the group consisting of CF 3 CF 2 CH 3  and CF 3 CF═CH 2 , comprising: reacting at least one starting material selected from the group consisting of halopropanes of the formula CX 3 CHClCH 2 X, halopropenes of the formula CX 3 CCl═CH 2  and halopropenes of the formula CX 2 ═CClCH 2 X, wherein each X is independently selected from the group consisting of F and Cl, with HF in a reaction zone, optionally in the presence of a fluorination catalyst, to produce a product mixture comprising HF, HCl, CF 3 CF 2 CH 3  and CF 3 CF═CH 2 , wherein the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric; and
 recovering said at least one product compound from the product mixture. 
 
     
     
         2 . The process of  claim 1  wherein the starting material comprises CF 3 CCl═CH 2 . 
     
     
         3 . A composition comprising:
 (a) CF 3 CCl═CH 2 , and   (b) HF; wherein the HF is present in an effective amount to form an azeotropic combination with the CF 3 CCl═CH 2 .   
     
     
         4 . The azeotropic composition of  claim 3  comprising from 28.3 mole percent to 39.8 mole percent CF 3 CCl═CH 2  and from 60.2 mole percent to 71.7 mole percent HF. 
     
     
         5 . The azeotropic composition of  claim 4 , wherein the composition has a vapor pressure of from 104.1 kPa to 2112.4 kPa at temperature of from 0° C. to 100° C. 
     
     
         6 . The azeotropic composition of  claim 3 , wherein the composition consists essentially of from 28.3 mole percent to 39.8 mole percent CF 3 CCl═CH 2  and from 60.2 mole percent to 71.7 mole percent HF. 
     
     
         7 . The azeotropic composition of  claim 6 , wherein the composition has a vapor pressure of from 104.1 kPa to 2112.4 kPa at temperature of from 0° C. to 100° C. 
     
     
         8 . A composition comprising:
 (a) CF 3 CF 2 CH 3 , and   (b) HF; wherein the HF is present in an effective amount to form an azeotropic combination with the CF 3 CF 2 CH 3 .   
     
     
         9 . The azeotropic composition of  claim 8  comprising from 60.5 mole percent to 74.6 mole percent CF 3 CF 2 CH 3  and from 25.4 mole percent to 39.5 mole percent HF. 
     
     
         10 . The azeotropic composition of  claim 7 , wherein the compositions has a vapor pressure of from 28.6 kPa to 2843.3 kPa at a temperature of from −40° C. to 90° C. 
     
     
         11 . The azeotropic composition of  claim 8 , wherein the composition consists essentially of from 60.5 mole percent to 74.6 mole percent CF 3 CF 2 CH 3  and from 25.4 mole percent to 39.5 mole percent HF. 
     
     
         12 . The composition of  claim 11 , wherein the compositions has a vapor pressure of from 28.6 kPa to 2843.3 kPa at a temperature of from −40° C. to 90° C.