Azeotropische Zusammensetzungen enthaltend 1,1,1,2,3,3,3-Heptafluorpropan und Verfahren, die diese Zusammensetzungen verwenden

摘要

Disclosed are compositions and a process for producing compositions comprising (c1), CF 3 CHFCF 3 , CF 3 CH 2 CF 3 or CHF 2 CH 2 CF 3 and (c2) at least one saturated halogenated hydrocarbon and/or ether having the formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ C n H 2n+2-a-b Cl a F b O c
wherein 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 (c2) does not include the selected component (c1) compound, wherein the molar ratio of component (c2) to component (c1) is between about 1:99 and a molar ratio of HF to component (c1) in an azeotrope or azeotrope-like composition of component (c1) with HF. The process involves (A) combining (i) the azeotropic composition with (ii) the fluorination precursor to component (c2); 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 (c1) and (c2) in the desired ratio. The compositions include at least two (c1) compounds, at least one of which is an ether.