Title:
A filtering method of a metal nanoparticle
Document Type and Number:
Japanese Patent JP5996963
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a filtration method of metal nanoparticles capable of maintaining a high filtration flow rate.SOLUTION: In the provided filtration method for separating metal nanoparticles from a liquid including metal nanoparticles via a separation membrane, the metal nanoparticles comprise a metal and a metal compound and have an average particle diameter confined to a range of 1-300 nm, and the separation membrane is a hydrophilic membrane constituted by a material having a water contact angle of 58 degrees or below; the filtration method comprises a filtration step performed at a filtration pressure of 0.1 MPa or below based on a cross-flow scheme and a washing step, whereas the washing step of the provided filtration method of metal nanoparticles is a washing step of periodically performing at least either of a back pressure wash and a pressure accumulation flushing wash and then returning the washing effluent into the raw water.
Inventors:
Kumami Kazuhisa
Shusuke Yokota
Shusuke Yokota
Application Number:
JP2012176601A
Publication Date:
September 21, 2016
Filing Date:
August 09, 2012
Export Citation:
Assignee:
Daisen Membrane Systems Co., Ltd.
International Classes:
B01D65/02; B01D61/14; B01D71/16; C02F1/44; C22B9/02; C22B34/12
Domestic Patent References:
| JP2009119461A | ||||
| JP8039064A | ||||
| JP2010214235A | ||||
| JP2005118608A | ||||
| JP7016567A | ||||
| JP5138166A | ||||
| JP2001000842A | ||||
| JP2010046621A |
Attorney, Agent or Firm:
Satoshi Furuya
Takahiko Mizobe
Yoshitsune Kazumasa
Takahiko Mizobe
Yoshitsune Kazumasa