Brevet : EP1711449 - PURIFICATION DE 1,1,1,3,3,3-HEXAFLUOROISOPROPANOL

Titre

PURIFICATION DE 1,1,1,3,3,3-HEXAFLUOROISOPROPANOL

N° et date de publication de la demande

EP1711449 - 18/10/2006

Type de la demande

A1

N° et date de dépôt

EP05706171.5 - 04/02/2005

N° et date de priorité

US54181804 - 04/02/2004

Famille de brevets

EP1711449A1 ; WO2005077873A1 ; ATE486833T1 ; BRPI0507454A ; CA2555653A1 ; KR20070001980A ; US2008058560A1 ; JP2007520561A ; ES2353389T3 ; EP2275396A2 ; CN1934060A

Abrégé

1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) substantially free of 1,1,1-trifluoroacctone (TFA) can be separated from a mixture containing both compounds by A) catalytic reduction with hydrogen followed by fractional distillation; B) cooling to a temperature at which HFIP freezes and TFA remains liquid; C) forming a high boiling complex comprising HF and TFA followed by fractional distillation; or D) producing HF-free conditions to yield a HFIP/TFA azeotrope followed by fractional distillation. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.