JPS5634728A - Reproduction of inert gas to be used in circulation in solid polymerization of polyester - Google Patents
Reproduction of inert gas to be used in circulation in solid polymerization of polyesterInfo
- Publication number
- JPS5634728A JPS5634728A JP11066179A JP11066179A JPS5634728A JP S5634728 A JPS5634728 A JP S5634728A JP 11066179 A JP11066179 A JP 11066179A JP 11066179 A JP11066179 A JP 11066179A JP S5634728 A JPS5634728 A JP S5634728A
- Authority
- JP
- Japan
- Prior art keywords
- inert gas
- contact
- polyester
- vapor
- polyfunctional alcohol
- 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
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To remove low-molecular-weight compounds obtained as by-products contained in an inert gas, to make long-term stable operation of solid polymerizer possible, and to control the variability of quality of polyester prepared, by bringing the inert gas into contact with a polyfunctional alcohol in vapor-liquid phase and to use it in circulation.
CONSTITUTION: Granules of preliminary crystallized polycondensate of polyester are brought into contact with an inert gas countercurrently in the tank 2 and introduced from the rotary valve 3 into the top of the solid polymerizer 4 of moving bed type. The inert gas from the blower 6 is heated by the heater 7 and introduced into the bottom of the device 4. The inert gas discharged from the top of the device 4 is brought into contact with a polyfunctional alcohol, e.g., ethylene glycol, etc. by the vapor-liquid contact device 8, made to pass through the post-treatment device 9, and returned to the blower 6. The polyfunctional alcohol is made to pass from the tank 9 through the filter 11 by the pump 10, cooled by the cooler 12, and fed to the vapor-liquid contact device 8 at constant rate.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11066179A JPS5634728A (en) | 1979-08-30 | 1979-08-30 | Reproduction of inert gas to be used in circulation in solid polymerization of polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11066179A JPS5634728A (en) | 1979-08-30 | 1979-08-30 | Reproduction of inert gas to be used in circulation in solid polymerization of polyester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5634728A true JPS5634728A (en) | 1981-04-07 |
Family
ID=14541272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11066179A Pending JPS5634728A (en) | 1979-08-30 | 1979-08-30 | Reproduction of inert gas to be used in circulation in solid polymerization of polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5634728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59193947A (en) * | 1983-04-19 | 1984-11-02 | Ishikawajima Harima Heavy Ind Co Ltd | Flame-retardant resin for use in oxygen atmosphere |
-
1979
- 1979-08-30 JP JP11066179A patent/JPS5634728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59193947A (en) * | 1983-04-19 | 1984-11-02 | Ishikawajima Harima Heavy Ind Co Ltd | Flame-retardant resin for use in oxygen atmosphere |
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