JPS55125110A - Purification of unreacted monomer and/or recovered solvent - Google Patents
Purification of unreacted monomer and/or recovered solventInfo
- Publication number
- JPS55125110A JPS55125110A JP3363179A JP3363179A JPS55125110A JP S55125110 A JPS55125110 A JP S55125110A JP 3363179 A JP3363179 A JP 3363179A JP 3363179 A JP3363179 A JP 3363179A JP S55125110 A JPS55125110 A JP S55125110A
- Authority
- JP
- Japan
- Prior art keywords
- dissolved oxygen
- water
- catalyst
- purification
- reused
- 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
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
PURPOSE: In purifying and reusing unreacted monomers and/or solvent recovered from the step of polymerizing conjugated dienes in the presence of catalyst, to make it possible to recycle and reuse purified products without lowering of polymerization activity and physical properties of the products, by providing a step of removing the dissolved oxygen.
CONSTITUTION: Unreacted monomers and/or solvents containing a small amount of water-soluble alcohols, recovered from the step of polymerizing conjugated dienes in the presence of a (coordinated) anionic catalyst such as Ziegler catalyst, composed of an organic aluminum compound and titanium tetrahalide, are brought into countercurrent contact with water to separate the water-soluble alcohols and then purified before they are recycled and reused in the polymerization step. Thereby, by providing a step of removing the dissolved oxygen by means of nitrogen fubbling, vacuum deaeration, etc., between said contact step and said purification step, the amount of the dissolved oxygen is decreased the about ≤1ppm, preferably ≤ 0.5ppm, before said purified products are recycled and reused.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3363179A JPS55125110A (en) | 1979-03-22 | 1979-03-22 | Purification of unreacted monomer and/or recovered solvent |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3363179A JPS55125110A (en) | 1979-03-22 | 1979-03-22 | Purification of unreacted monomer and/or recovered solvent |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55125110A true JPS55125110A (en) | 1980-09-26 |
Family
ID=12391791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3363179A Pending JPS55125110A (en) | 1979-03-22 | 1979-03-22 | Purification of unreacted monomer and/or recovered solvent |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125110A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08171234A (en) * | 1995-06-26 | 1996-07-02 | Canon Inc | Picture forming method |
-
1979
- 1979-03-22 JP JP3363179A patent/JPS55125110A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08171234A (en) * | 1995-06-26 | 1996-07-02 | Canon Inc | Picture forming method |
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