METHOD AND DEVICE FOR PURIFYING 1,4-BIS (BROMODIFLUOROMETHYL) BENZENE
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United States of America Patent
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app pub date -
Nov 14, 2008
filing date -
May 11, 2004
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Abstract
A method and a device for purifying 1,4-bis (bromodifluoromethyl) benzene are disclosed. In order to solve the problem of hard to purify and separate 1,4-bis (bromodifluoromethyl) benzene crude products, diphenylmethane that has a higher boiling point and does not interact with 1,4-bis (bromodifluoromethyl) benzene is mixed with the 1,4-bis (bromodifluoromethyl) benzene crude products for evaporation. Afterwards, the purity of the vaporized product is detected and only that reaching an expected purity is collected to obtain high-purity 1,4-bis (bromodifluoromethyl) benzene.
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