JPS559621A - Continuous production of polyester - Google Patents
Continuous production of polyesterInfo
- Publication number
- JPS559621A JPS559621A JP8165778A JP8165778A JPS559621A JP S559621 A JPS559621 A JP S559621A JP 8165778 A JP8165778 A JP 8165778A JP 8165778 A JP8165778 A JP 8165778A JP S559621 A JPS559621 A JP S559621A
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- reactors
- vacuum
- stirring
- bis
- 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
- 229920000728 polyester Polymers 0.000 title abstract 2
- 238000010924 continuous production Methods 0.000 title 1
- 238000003756 stirring Methods 0.000 abstract 3
- 230000005484 gravity Effects 0.000 abstract 1
- 238000006068 polycondensation reaction Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000011541 reaction mixture Substances 0.000 abstract 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: In the polycondensation of bis-β-hydroxyethyl terephthalate, the vacuum in the reactors is controlled in response to the change of the measured values of electric power for stirring at the final reactor which is one of reactors arranged in series, thus producing continuously uniform polyesters with reduced fluctuatin in quality.
CONSTITUTION: Bis-β-hydroxyethyl terephthalate and/or its oligomers are continuously fed by pump 4 into the first reactor 1. The reaction mixture flows down from the first reactor 1 through the second reactor 2 and the third reactor 3 to intermediate tank 6 by its gravity. The degree of vacuum in the reactors 1, 2, and 3 is adjusted to the prescribed value by vacuum generators 14, 17, and 22 along with vacuum recording regulators 16, 19, and 24; however, at least in the final reactors among reactors from which the polymer has an intrinsic viscosity of over 0.2 at the outlets, the degree of vacuum is controlled so that the values measured by stirring controller or stirring power recording controllers 20, 25 are kept to the prescribed levels.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8165778A JPS5943049B2 (en) | 1978-07-05 | 1978-07-05 | Continuous production method of polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8165778A JPS5943049B2 (en) | 1978-07-05 | 1978-07-05 | Continuous production method of polyester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS559621A true JPS559621A (en) | 1980-01-23 |
| JPS5943049B2 JPS5943049B2 (en) | 1984-10-19 |
Family
ID=13752388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8165778A Expired JPS5943049B2 (en) | 1978-07-05 | 1978-07-05 | Continuous production method of polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5943049B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61502276A (en) * | 1984-04-06 | 1986-10-09 | ベ−テ−ゲ− ケレ インベンティング アクティエボラ−グ | Method and device for measuring the concentration of fiber suspension |
-
1978
- 1978-07-05 JP JP8165778A patent/JPS5943049B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61502276A (en) * | 1984-04-06 | 1986-10-09 | ベ−テ−ゲ− ケレ インベンティング アクティエボラ−グ | Method and device for measuring the concentration of fiber suspension |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5943049B2 (en) | 1984-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0174062A2 (en) | Process for the depolymerization of polyester scrap | |
| ES8205817A1 (en) | Continuous process and apparatus to produce a vinylchloride resin in an aqueous suspension. | |
| EP0096362A3 (en) | Stabilization of polycondensation catalysts | |
| ES8603290A1 (en) | Apparatus for controlling polymerisation reactors. | |
| GB1528438A (en) | Multiple polyesterification process | |
| JPS4880018A (en) | ||
| JPS57155204A (en) | Vapor-phase polymerization of olefin and equipment therefor | |
| US3576675A (en) | Continuous mixing of battery paste | |
| JPS56118420A (en) | Production of polyester | |
| US2843874A (en) | Process and apparatus for densifying and pelleting carbon black | |
| DE69416155T2 (en) | METHOD FOR PRODUCING AN ISOMERIZATION CATALYST | |
| US4237261A (en) | Process for continuously producing polyester and spun fiber | |
| GB1125258A (en) | A process for the continuous production of high polymer polyesters or mixed polyesters | |
| JPS5699264A (en) | Production of polyester resin composition for powder paint | |
| JPS5725325A (en) | Production of molding polyester | |
| JPS555903A (en) | Production of linear polyester | |
| SU829617A1 (en) | Method of esterification process control | |
| JPS57172920A (en) | Continuous esterification of terephthalic acid | |
| GB1473671A (en) | Process for the production of a diol | |
| JPS5391996A (en) | Method of quality control of polyester | |
| GB1367612A (en) | Method and apparatus for processing organic food substances by the passage of electric current | |
| JPS5515424A (en) | Continuous esterification of terephthalic acid | |
| GB2058805A (en) | Process for continuously producing polyester and spun fiber | |
| GB1362668A (en) | Polycondensation in the liquid phase | |
| JPS531695A (en) | Method and apparatus for producing hydrogen |