Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2008-07-29
2009-06-09
Parsa, Jafar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S170000
Reexamination Certificate
active
07544846
ABSTRACT:
A method for producing 1,4-bis(difluoromethyl)tetrafluorobenzene is disclosed, which has the following steps: (a) mixing 1,4-bis(dichloromethyl)tetrafluorobenzene, a catalyst, an aprotic polar solvent, and an alkali metal fluoride to form a reaction mixture; (b) heating the reaction mixture; and (c) purifying the resultant to obtain 1,4-bis(difluoromethyl)tetrafluorobenzene.
REFERENCES:
Bailey et al., Fluorination with complex metal fluorides, (Journal of Fluorine Chemistry, 1987, 37 pages 1-14).
Chou Chuan-Yu
Ho Chan-Yuan
Lin Chun-Hsu
Ou Wei-Hsiung
Tu Chac-Chou
Bacon & Thomas PLLC
Chung-Shan Institute of Science and Technology Armaments Bureau,
Parsa Jafar
Yuan-Shin Materials Technology Corp.
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