Title:
GEM-DIHYDROPOLYFLUOROALKANES AND MONOHYDROPOLYFLUOROALKENES, PROCESSES FOR THEIR PRODUCTION, AND USE OF GEM-DIHYDROPOLYFLUOROALKANES IN CLEANING COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO1993005002
Kind Code:
A3
Abstract:
A catalyic process is disclosed for producing fluorine-substituted hydrocarbon products of the formulae RCH2CF2R and RFC=CHR at an elevated temperature, from compounds of the formula RCHFCHFR, where each R is independently selected from the group consisting of -CF3, -CF2CF3 and -CF2CF2CF3 or where both R groups of a formula together are -(CF2)2-, -(CF2)3- or -(CF2)4-. Suitable catalysts include carbon catalysts and catalysts containing at least one compound of a selected metal (e.g., Na, K, Rb, Cs, Y, La, Ce, Pr, Nd, Sm, Cr, Fe, Co, Rh, Ni, Cu, and/or Zn) supported on carbon.The saturated gem-dihydro- products may also be produced by hydrofluorinating the corresponding olefinic product over such catalysts at an elevated temperature, and can be combined with various other miscible solvents to form compositions useful for cleaning. Compounds such as CF3CF2CH2CF2CF3, CF3CF2CH2(CF2)2CF3, CF3CH=CF (CF2)2CF3, CF3CF=CH(CF2)2CF3, CF3CF2CH2(CF2)3CF3, CF3(CF2)2CH2(CF2)2CF3, CF3CH=CF(CF2)3CF3, CF3CF=CH (CF2)3CF3, CF3(CF2)2CH2(CF2)3CF3, CF3CF2CH2(CF2)4CF3, CF3CH=CF(CF2)4CF3, CF3CF=CH (CF2)4CF3, CF3CF2CH=CF(CF2)3CF3, CF3CF2CF=CH(CF2)3CF3 andand azeotropic compositions such as azeotropes of CF3CH2CF2CF2CF3 and/or CF3CF2CH2CF2CF3 with methanol, ethanol, or isopropanol are disclosed.
Inventors:
RAO VELLIYUR NOTT MALLIKARJUNA (US)
WEIGERT FRANK JULIAN (US)
KRESPAN CARL GEORGE (US)
WEIGERT FRANK JULIAN (US)
KRESPAN CARL GEORGE (US)
Application Number:
PCT/US1992/007147
Publication Date:
May 13, 1993
Filing Date:
August 28, 1992
Export Citation:
Assignee:
DU PONT (US)
International Classes:
B01J27/20; C07B61/00; C07C17/00; C07C17/087; C07C17/25; C07C17/278; B01J21/16; C07C17/354; C07C17/358; C07C19/08; C07C21/18; C07C23/08; C11D7/30; C11D7/50; C23G5/028; C11D7/26; C11D7/28; C11D7/32; (IPC1-7): C07C19/08; C07C23/08; C07C21/18; C07C17/00; C07C17/08; C11D7/30
Foreign References:
| EP0431458A1 | 1991-06-12 | |||
| EP0458279A2 | 1991-11-27 | |||
| US2975220A | 1961-03-14 | |||
| EP0376686A1 | 1990-07-04 |
Other References:
JOURNAL OF THE CHEMICAL SOCIETY 1963, LETCHWORTH GB pages 281 - 289 R. J. HEITZMAN ET AL. 'Fluorocyclopentanes. Part I. The 1H,2H and 1H,3H- Octafluorocyclopentanes, and 1H,3H/2H- Heptafluorocyclopentane.'
BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR DIVISION OF CHEMICAL SCIENCE vol. 31, no. 7, 20 January 1983, NEW YORK US pages 1414 - 1416 V. A. PETROV ET AL. 'Electrophilic Condensation of 1-Hydroperfluoropropylene and 1-Hydroperfluoro-1-butene with Fluoroethylenes'
BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR DIVISION OF CHEMICAL SCIENCE vol. 31, no. 7, 20 January 1983, NEW YORK US pages 1414 - 1416 V. A. PETROV ET AL. 'Electrophilic Condensation of 1-Hydroperfluoropropylene and 1-Hydroperfluoro-1-butene with Fluoroethylenes'
Download PDF:
Previous Patent: METHOD FOR SYNTHESIZING ALKYLATED AROMATIC HYDROCARBONS
Next Patent: NOVEL COMPOUND AND SEPARATING AGENT
Next Patent: NOVEL COMPOUND AND SEPARATING AGENT