JPS5659786A - Purification of orthophosphate ester used for electrical insulation - Google Patents
Purification of orthophosphate ester used for electrical insulationInfo
- Publication number
- JPS5659786A JPS5659786A JP13690679A JP13690679A JPS5659786A JP S5659786 A JPS5659786 A JP S5659786A JP 13690679 A JP13690679 A JP 13690679A JP 13690679 A JP13690679 A JP 13690679A JP S5659786 A JPS5659786 A JP S5659786A
- Authority
- JP
- Japan
- Prior art keywords
- electrical insulation
- insulation oil
- purified
- subjected
- purification
- 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
- Organic Insulating Materials (AREA)
Abstract
PURPOSE: After purification through specific process, an orthophosphate ester is diluted with an aromatic insulation oil and they are subjected to adsorption, deaeration and dehydration, being purified through simple process to such a high level that it can be satisfactorily used as an electrical insulation oil.
CONSTITUTION: An orthophosphate ester is subjected to rectification where the rectification effect equivalent to 5 or more theoretical plate is obtained and the initial fraction and the residue are excluded by more than 2wt%, preferably about 5wt% based on the total amount of the feed. Then, the purified ester is diluted with an aromatic insulation oil such as diisopropylnaphthalene and they are subjected to adsorption treatment by passing them through a column filled with an adsorbent and/or an electrophoretic adsorber. Further, they are deaerated and dehydrated by means of a rotary evaporator to give the purified orthophosphate ester for electrical insulation oil.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13690679A JPS5659786A (en) | 1979-10-22 | 1979-10-22 | Purification of orthophosphate ester used for electrical insulation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13690679A JPS5659786A (en) | 1979-10-22 | 1979-10-22 | Purification of orthophosphate ester used for electrical insulation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5659786A true JPS5659786A (en) | 1981-05-23 |
Family
ID=15186328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13690679A Pending JPS5659786A (en) | 1979-10-22 | 1979-10-22 | Purification of orthophosphate ester used for electrical insulation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5659786A (en) |
-
1979
- 1979-10-22 JP JP13690679A patent/JPS5659786A/en active Pending
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