Claims
- 1. A process for the purification of contaminated 1,1,1-trifluoro-2-chloro-2-bromoethane comprising:
- a. mixing 1,1,1-trifluoro-2-chloro-2-bromoethane containing impurities of compounds consisting essentially of the formula CF.sub.3 --CX=CY--CF.sub.3 where X is hydrogen, chlorine or bromine and Y is chlorine or bromine, with at least one organic amine selected from the group consisting of acyclic amino compounds whose pK.sub.b is less than 3, cyclic amino compounds whose pK.sub.b value is less than 3, aliphatic primary diamines having 2 to 8 carbon atoms whose pK.sub.b value is less than 3 and aliphatic secondary diamines having 2 to 8 carbon atoms whose pK.sub.b value is less than 3 to form a reaction mixture consisting essentially of said 1,1,1-trifluoro-2-chloro-2-bromoethane, said impurities and said amine;
- b. reacting said impurity with said amine; and
- c. separating the purified 1,1,1-trifluoro-2-chloro-2-bromoethane from the resultant reaction mixture.
- 2. The process of claim 1 wherein the reaction is carried out at elevated temperatures.
- 3. The process of claim 1 wherein the reaction is carried out at a temperature of from about 20.degree. C to 50.degree. C.
- 4. The process of claim 1 wherein the separation of the purified product is carried out by
- a. adding water to the organic reaction mixture whereby aqueous and organic phases are formed;
- b. separating the aqueous phase from the organic phase; and
- c. distilling the purified product from the organic phase.
- 5. The process of claim 1 wherein the separation of the purified product is carried out by fractionally distilling the reaction mixture.
- 6. The process of claim 1 wherein the amine is of the general formula:
- H.sub.2 n -- (ch.sub.2 -- ch.sub.2 -- nh).sub.n -- H
- where n .gtoreq. 2.
- 7. The process of claim 1 wherein at least one mole of amine per mole of impurity is present in the reaction mixture.
- 8. A process for the purification of contaminated 1,1,1-trifluoro-2-chloro-2-bromoethane comprising:
- a. mixing 1,1,1-trifluoro-2-chloro-2-bromoethane containing impurities consisting essentially of compounds of the formula CF.sub.3 --CX=CY--CF.sub.3 where X is hydrogen, chlorine or bromine and Y is chlorine or bromine with at least one organic amine selected from the group consisting of diethylenetriamine, 1,3-propanediamine, piperidine, pyrrolidine, ethanolamine, ethylenediamine and N,N'-dimethyl-1,3-propanediamine and mixtures thereof to form a reaction mixture consisting essentially of 1,1,1-trifluoro-2-chloro-2-bromoethane, said impurities and said amine;
- b. reacting said impurity with said amine; and
- c. separating the purified 1,1,1-trifluoro-2-chloro-2-bromoethane from the resultant reaction mixture.
- 9. A process according to claim 8 wherein said amine is ethylene diamine.
- 10. A process according to claim 8 wherein said amine, is N,N-dimethyl-1,3-propane diamine.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2120756 |
Apr 1971 |
DT |
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Parent Case Info
This is a continuation of application Ser. No. 224,628 now abandoned, filed Feb. 8, 1972.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3004075 |
Marcali |
Oct 1961 |
|
3321383 |
Scherer et al. |
May 1967 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
1,600,040 |
Aug 1970 |
FR |
Continuations (1)
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Number |
Date |
Country |
Parent |
224628 |
Feb 1972 |
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