JPS5462181A - Filter regenerating method - Google Patents
Filter regenerating methodInfo
- Publication number
- JPS5462181A JPS5462181A JP12863077A JP12863077A JPS5462181A JP S5462181 A JPS5462181 A JP S5462181A JP 12863077 A JP12863077 A JP 12863077A JP 12863077 A JP12863077 A JP 12863077A JP S5462181 A JPS5462181 A JP S5462181A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- soln
- dipped
- polyester
- regenerated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Filtration Of Liquid (AREA)
Abstract
PURPOSE: To very easily regenerate a filter whose opening is as small as below 1 μ by dipping the filter used at the time of producing or molding polyester in a soln. and bringing the filter into contact with an ultrasonic generating face in such a state that the filter is being dipped in the soln. or water.
CONSTITUTION: A filter used at the time of producing polyester from terephthalic acid and/or dimethylterephthalate and alkylene glycol as main raw materials or molding the polyester is regenerated as follows; it is first dipped in a soln. of glycol or alkali metal hydroxide such as NaOH and then brought into direct contact with an ultrasonic generating face having a capacity above 5, esp. above 10 W/cm2 in such a state that the filter is being dipped in the above soln., other soln. or water. Thus, the filter is regenerated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12863077A JPS5462181A (en) | 1977-10-28 | 1977-10-28 | Filter regenerating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12863077A JPS5462181A (en) | 1977-10-28 | 1977-10-28 | Filter regenerating method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5462181A true JPS5462181A (en) | 1979-05-18 |
Family
ID=14989549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12863077A Pending JPS5462181A (en) | 1977-10-28 | 1977-10-28 | Filter regenerating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5462181A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002186918A (en) * | 2000-12-19 | 2002-07-02 | Toray Ind Inc | Method for cleaning filter used for filtering polyester constituent, and method for manufacturing polyester film used for magnetic recording medium |
JP2010274238A (en) * | 2009-06-01 | 2010-12-09 | Teijin Dupont Films Japan Ltd | Filter cleaner and filter cleaning method |
JP2013193066A (en) * | 2012-03-22 | 2013-09-30 | Sumitomo Chemical Co Ltd | Washing method of filter |
-
1977
- 1977-10-28 JP JP12863077A patent/JPS5462181A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002186918A (en) * | 2000-12-19 | 2002-07-02 | Toray Ind Inc | Method for cleaning filter used for filtering polyester constituent, and method for manufacturing polyester film used for magnetic recording medium |
JP2010274238A (en) * | 2009-06-01 | 2010-12-09 | Teijin Dupont Films Japan Ltd | Filter cleaner and filter cleaning method |
JP2013193066A (en) * | 2012-03-22 | 2013-09-30 | Sumitomo Chemical Co Ltd | Washing method of filter |
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