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Patent Searching and Data


Title:
METHOD FOR PURIFYING TRIPHENYLAMINE-BASED COMPOUND AND TRIPHENYLAMINE-BASED COMPOUND
Document Type and Number:
Japanese Patent JP2006335660
Kind Code:
A
Abstract:

To provide a method for purifying a triphenylamine-based compound, by which the triphenylamine-based compound can be purified at a remarkably low residual solvent rate without forming an oily substance, and to provide the triphenylamine-based compound.

This method for purifying the triphenylamine-based compound represented by general formula (1) is characterized by dissolving the triphenylamine-based compound in a good solvent, and then dropping the obtained solution in a poor solvent to deposit the crystals of the triphenylamine-based compound. The crystals are filtered, and the obtained crystals are vacuum-dried in an atmosphere having a temperature of 40°C and an atmospheric pressure of 266.6 Pa for eight hours to obtain the finely particulate crystals.


Inventors:
ICHIGUCHI TETSUYA
Application Number:
JP2005159746A
Publication Date:
December 14, 2006
Filing Date:
May 31, 2005
Export Citation:
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Assignee:
KYOCERA MITA CORP
International Classes:
C07C209/84; C07C211/54
Attorney, Agent or Firm:
Inaoka cultivation
Mio Kawasaki