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Patent Searching and Data


Title:
PCB含有油の回収方法
Document Type and Number:
Japanese Patent JP3576377
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for recovering a PCB-containing oil remaining in space portions among silicon steal plates constituting an iron core, capable of highly efficiently recovering the PCB-containing oil without affecting environments. SOLUTION: This method for recovering an oil containing PCB comprises pressing an iron core 1 with a pressure capable of approximately expanding spaces between silicon steel plates 2 from the vertical direction based on the laminate surface of the iron core 1 to deform the iron core 1, subjecting the deformed iron core 1 to a vacuum ultrasonic washing means to elute the PCB- containing oil into a washing solvent, and subsequently separating and recovering the PCB-containing oil from the washing solvent. The iron core 1 comprises the laminate of several silicon steel plates 2 and has the PCB- containing oil remaining therein.

Inventors:
Takeshi Matsumura
Masakatsu Mukai
Masayoshi Yamashita
Jun Arai
Yasutsugu Watanabe
Application Number:
JP11549398A
Publication Date:
October 13, 2004
Filing Date:
April 24, 1998
Export Citation:
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Assignee:
Toyo Engineering Corporation
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
International Classes:
C07C17/383; B08B3/12; B09B3/00; B09B5/00; C07C25/18; (IPC1-7): B09B5/00; B08B3/12; B09B3/00
Domestic Patent References:
JP2232073A
JP4186605A
Foreign References:
US4299704
US4699667
Other References:
HAWTHORNE S H,(Ontario Hydro, Canada),Solvent decontamination of PCB electrical equipment.,Conf Rec Ind Commer Power Syst Tech Conf,米国,1982年,VOL.1982,PAGE.74-78
Attorney, Agent or Firm:
Toshizo Iida