JPS54133598A - Continuous polymerization of lactam - Google Patents
Continuous polymerization of lactamInfo
- Publication number
- JPS54133598A JPS54133598A JP4232078A JP4232078A JPS54133598A JP S54133598 A JPS54133598 A JP S54133598A JP 4232078 A JP4232078 A JP 4232078A JP 4232078 A JP4232078 A JP 4232078A JP S54133598 A JPS54133598 A JP S54133598A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- gas
- water
- atmospheric pressure
- phase
- 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
Landscapes
- Polyamides (AREA)
Abstract
PURPOSE: To prepare polyamide having uniform molecular weight, by keeping the pressure at the gas-phase part of a polymerization tower to a definite value slightly higher than the maximum atmospheric pressure, thereby preventing the variation of the gas-phase pressure with the variation of atmospheric pressure.
CONSTITUTION: Caprolactam is pre-polymerized at 200W270°C under a pressure of 0.1W2.0 kg/cm2 in the presence of water, and the prepolymer is polymerized in a continuous polymerizing tower 1. The mixture of generated water and lactam monomer and the introduced inert gas (N2) are introduced from the gas-phase of the polymerization tower 1 through a piping 8, a partial condenser 6 and a condenser 7 to water-seal tanks 12 and 13. The rate of discharge is controlled with a flow-control valve of the piping 8 according to the pressure of the gas-phase part of the polymerization tower 1, and the pressure is maintained to a definite value slightly higher than the maximum atmospheric pressure, i.e. about 1030 mb. The water-seal tank 12 has a depth of about 2 cm and used for the pressure controlling, and the tank 13 has a depth of about 50 cm and acts a role of the safety valve in case of an abnormally low atmospheric pressure.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4232078A JPS54133598A (en) | 1978-04-10 | 1978-04-10 | Continuous polymerization of lactam |
| SE8500424A SE8500424D0 (en) | 1978-03-31 | 1985-01-30 | HYDRAULIC ENGINE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4232078A JPS54133598A (en) | 1978-04-10 | 1978-04-10 | Continuous polymerization of lactam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54133598A true JPS54133598A (en) | 1979-10-17 |
| JPS6115090B2 JPS6115090B2 (en) | 1986-04-22 |
Family
ID=12632714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4232078A Granted JPS54133598A (en) | 1978-03-31 | 1978-04-10 | Continuous polymerization of lactam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54133598A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996026235A3 (en) * | 1995-02-23 | 1996-10-17 | Polymeer Engineering Gmbh | Process and device for producing high-viscosity or highly stabilized reaction-stable polyamides, and for continuously demonomerizing polyamides |
-
1978
- 1978-04-10 JP JP4232078A patent/JPS54133598A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996026235A3 (en) * | 1995-02-23 | 1996-10-17 | Polymeer Engineering Gmbh | Process and device for producing high-viscosity or highly stabilized reaction-stable polyamides, and for continuously demonomerizing polyamides |
| US6258926B1 (en) * | 1995-02-23 | 2001-07-10 | Polymer Engineering Gmbh | Process and device for producing high-viscosity or highly stabilized reaction-stable polyamides, and for continuously demonomerizing polyamides |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6115090B2 (en) | 1986-04-22 |
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