Preparation of highly pure fluorine compounds

US6720465B2 · kind B2 · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Max Braun · Großburgwedel, DE
• Carsten Brosch · Seelze, DE
• Heinz Gress · Hannover, DE

Key dates

• Filing date: Mar 4, 2002
• Grant date: Apr 13, 2004
• Expiry date: Dec 13, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/395
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing purified, saturated, partially fluorinated or perfluorinated hydrocarbon compounds from crude products which are contaminated with impurity compounds which absorb light at a wavelength of &lgr;>200 nm by irradiating the crude product with UV radiation of a wavelength of &lgr;>200 nm and thereafter recovering highly pure, partially fluorinated or perfluorinated hydrocarbon compounds from the irradiated reaction product, for example, by simple vacuum distillation.