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:
Dec. 16, 2008
Filed:
Jul. 27, 2004
Shean-jeng Jong, Longtan Township, Taoyuan County, TW;
Chun-hsu Lin, Longtan Township, Taoyuan County, TW;
Chao-chou Tu, Longtan Township, Taoyuan County, TW;
Chung-chien Chang, Longtan Township, Taoyuan County, TW;
Shean-Jeng Jong, Longtan Township, Taoyuan County, TW;
Chun-Hsu Lin, Longtan Township, Taoyuan County, TW;
Chao-Chou Tu, Longtan Township, Taoyuan County, TW;
Chung-Chien Chang, Longtan Township, Taoyuan County, TW;
Chung Shan Institute of Science and Technology, Taoyuan County, TW;
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.