The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2005
Filed:
Jun. 12, 2003
Ralph Thomas Baker, Los Alamos, NM (US);
Ralph Newton Miller, Newark, DE (US);
Viacheslav Alexandrovich Petrov, Hockessin, DE (US);
Velliyur Nott Mallikarjuna Rao, Wilmington, DE (US);
Allen Capron Sievert, Elkton, MD (US);
Ralph Thomas Baker, Los Alamos, NM (US);
Ralph Newton Miller, Newark, DE (US);
Viacheslav Alexandrovich Petrov, Hockessin, DE (US);
Velliyur Nott Mallikarjuna Rao, Wilmington, DE (US);
Allen Capron Sievert, Elkton, MD (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A liquid phase process is disclosed for producing halogenated alkane adducts of the formula CARRCBRR(where A, B, R, R, R, and Rare as defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CRR═CRRin a dinitrile or cyclic carbonate ester solvent which divides the reaction mixture into two liquid phases and in the presence of a catalyst system containing (i) at least one catalyst selected from monovalent and divalent copper; and optionally (ii) a promoter selected from aromatic or aliphatic heterocyclic compounds which contain at least one carbon-nitrogen double bond in the heterocyclic ring. When hydrochlorofluorocarbons are formed, the chlorine content may be reduced by reacting the hydrochlorofluorocarbons with HF. New compounds disclosed include CFCFCClCHCCl, CFCClCHCHCl and CFCClCHCHClF. These compounds are useful as intermediates for producing hydrofluorocarbons. Azeotropes of CClFCHCFwith HF and azeotropes of CFCHCHFwith HF are also disclosed; as are process for producing such azeotropes. A process for purification of certain hydrofluorocarbons and/or chloro-precursors thereof from mixtures of such compounds with HF is also disclosed.