JPS55125112A - Purification of unreacted monomer and/or recovered solvent - Google Patents
Purification of unreacted monomer and/or recovered solventInfo
- Publication number
- JPS55125112A JPS55125112A JP3363379A JP3363379A JPS55125112A JP S55125112 A JPS55125112 A JP S55125112A JP 3363379 A JP3363379 A JP 3363379A JP 3363379 A JP3363379 A JP 3363379A JP S55125112 A JPS55125112 A JP S55125112A
- Authority
- JP
- Japan
- Prior art keywords
- water
- reused
- recycled
- distilled
- oxygen
- 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.)
- Granted
Links
Abstract
PURPOSE: Unreacted monomers and/or solvents recovered from the step of polymerizing conjugated dienes in the presence of catalysts, are brought into countercurrent contact with water, distilled to remove high-boiling impurities and separated from oxygen, whereby the resulting products may be recycled and reused without lowering of polymerization activity.
CONSTITUTION: Unreacted monomers and/or solvents such as pentane or xylene, containing a small amount of water-soluble alcohols, recovered from the step of polymerizing conjugated dienes such as isoprene, in the presence of a (coordinated) anionic catalyst such as Ziegler catalyst, are brought into countercurrent contact with water to remove the water-soluble alcohols, distilled and then dehydrated before they are recycled and reused in the polymerization step. Thereby, after removing the water-soluble alcohols, they are distilled to separate the high-boiling impurities, then kept at ≤50°C and separated from oxygen by means of nitrogen bubbling, vacuum deaeration, etc., within four hours after the distillation, to reduce the the amount of the oxygen dissolved to ≤1ppm, preferably ≤0.5ppm, before they are recycled and reused.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3363379A JPS55125112A (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 |
---|---|---|---|
JP3363379A JPS55125112A (en) | 1979-03-22 | 1979-03-22 | Purification of unreacted monomer and/or recovered solvent |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125112A true JPS55125112A (en) | 1980-09-26 |
JPH0144724B2 JPH0144724B2 (en) | 1989-09-29 |
Family
ID=12391847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3363379A Granted JPS55125112A (en) | 1979-03-22 | 1979-03-22 | Purification of unreacted monomer and/or recovered solvent |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125112A (en) |
-
1979
- 1979-03-22 JP JP3363379A patent/JPS55125112A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0144724B2 (en) | 1989-09-29 |
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