Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Reexamination Certificate
2011-05-17
2011-05-17
Berman, Susan W (Department: 1765)
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
C204S157940, C422S186300, C570S123000, C570S170000, C570S260000
Reexamination Certificate
active
07943015
ABSTRACT:
A photochemical reaction apparatus including a reactor and a light source situated so that light from the light source is directed through a portion of the reactor wall is disclosed. The apparatus is characterized by the portion of the reaction wall comprising a copolymer of a perfluoro (alkyl vinyl ether). The perfluoro (alkyl vinyl ether) is selected from the group consisting of CF30CF═CF2, C2F5OCF═CF2, C3F7OCF═F2, and mixture thereof. Also disclosed is a photochemical reaction process wherein light from a light source is directed through said reactor wall to interact with reactants in said reactor. A process for increasing the fluorine content of at least one compound selected from hydrocarbons and halohydrocarbons, comprising: (a) photochlorinating said at least one compound; and (b) reacting the halogenated hydrocarbon produced in (a) with HF. A process for producing an olefinic compound, comprising: (a) photochlorinating at least one compound selected from hydrocarbons and halohydrocarbons containing at least two carbon atoms and at least two hydrogen atoms to produce a halogenated hydrocarbon containing a hydrogen substituent and a chlorine substituent on adjacent carbon atoms; and (b) subjecting the halogenated hydrocarbon produced in (a) to dehydrohalogenation.
REFERENCES:
patent: 3554887 (1971-01-01), Feehs
patent: 4855112 (1989-08-01), Adcock et al.
patent: 4973742 (1990-11-01), Ohsaka et al.
patent: 5026801 (1991-06-01), Krespan et al.
patent: 5190626 (1993-03-01), Yates et al.
patent: 5258561 (1993-11-01), Nappa et al.
patent: 5350821 (1994-09-01), Feiring et al.
patent: 5414165 (1995-05-01), Nappa et al.
patent: 5750808 (1998-05-01), Cassel et al.
patent: 5872157 (1999-02-01), DeSimone et al.
patent: 5919878 (1999-07-01), Brothers et al.
patent: 6489510 (2002-12-01), Braun et al.
patent: 7009017 (2006-03-01), Kurihara et al.
patent: 7524999 (2009-04-01), Nappa et al.
patent: 2007/0009403 (2007-01-01), Ehrfeld et al.
patent: 2007/0265368 (2007-11-01), Rao et al.
patent: 2008/0076950 (2008-03-01), Rao et al.
patent: 2008/0108853 (2008-05-01), Nappa et al.
patent: 2008/0149472 (2008-06-01), Rao et al.
patent: 196 34 780 (1998-03-01), None
patent: 0729932 (1996-04-01), None
patent: WO 97/24306 (1997-07-01), None
patent: WO 02/93261 (2002-01-01), None
patent: WO 03/068718 (2003-08-01), None
patent: WO 03/097588 (2003-11-01), None
patent: WO 2004/018093 (2004-03-01), None
R. Roberts et al., Applications of Photochemistry, 1984, pp. 27-30, Technomic Publishing Co. Inc.
E. Tschuikow-Roux et al., Photochlorination of Chloroethane and Chloroethane-d5, J. Phys. Chem., 1984, vol. 88:1408-1414.
Walling et al., The Relative Reactivities of Substituted Toluenes Toward Chlorine Atoms, J. Amer. Chem. Soc.; 1957, vol. 79:4181-4187.
P. Boule et al., Photodimerization of Maleic Anhydride in Carbon Tetrachloride, Tetrahedron Letters, 1976, vol. 11:865-868.
Journal of Fluorine Chemistry, “Modification of Perfluorinated Polymers by High Energry”, Klaus Lunkwitz et al, Dresdon, Germany, 2004, pp. 863-873.
Rao Velliyur Nott Mallikarjuna
Sievert Allen Capron
Berman Susan W
E. I. Du Pont de Nemours and Company
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