Patent ID: 6224781
Filing Date: 2001-05-01
Classification: A62D

Abstract:
A process for producing compositions comprising (a) a compound which forms an azeotrope or azeotrope-like composition with HF and is selected from the group consisting of CHF.sub.2 CF.sub.3, CHF.sub.2 CHF.sub.2, CH.sub.2 FCF.sub.3, CH.sub.3 CF.sub.3, CH.sub.3 CHF.sub.2, CH.sub.2 FCF.sub.2 CHF.sub.2 and CHF.sub.2 CF.sub.2 CF.sub.2 CHF.sub.2 and (b) at least one saturated compound selected from halogenated hydrocarbons and ethers having the formula:C.sub.n H.sub.2n+2-a-b Cl.sub.a F.sub.b O.sub.cwherein n is an integer from 1 to 4, a is an integer from 0 to 2n+1, b is an integer from 1 to 2n+2-a, and c is 0 or 1, provided that when c is 1 then n is an integer from 2 to 4, and provided that component (b) does not include the selected component (a) compound, wherein the molar ratio of component (b) to component (a) is between about 1:99 and a molar ratio of HF to component (a) in an azeotrope or azeotrope-like composition of component (a) with HF, comprising:(A) combining (i) said azeotrope or azeotrope-like composition with (ii) at least one fluorination precursor compound wherein the precursor component (ii) is the fluorination precursor to component (b); and(B) reacting a sufficient amount of the HF from the azeotrope or azeotrope-like composition (i) with precursor component (ii) to provide a composition containing components (a) and (b) in said ratio.