JPS56161421A - Production of polyester - Google Patents
Production of polyesterInfo
- Publication number
- JPS56161421A JPS56161421A JP6460380A JP6460380A JPS56161421A JP S56161421 A JPS56161421 A JP S56161421A JP 6460380 A JP6460380 A JP 6460380A JP 6460380 A JP6460380 A JP 6460380A JP S56161421 A JPS56161421 A JP S56161421A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- column
- dimethyl terephthalate
- reflux
- rectifying column
- 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 prevent blocking of a condenser, distributor, etc., by altering the reflux ratio of a rectifying column a plurality of times according to the transesterification temperature, in the batchwise transesterification between dimethyl terephthalate and ethylene glycol.
CONSTITUTION: Dimethyl terephthalate and ethylene glycol are charged through a material inlet 7 into a reaction vessel 6, and transesterified under heating and agitation by means of an agitator 8. The methanol formed by the reaction and the accompanying glycol and dimethyl terephthalate are passed into a rectifying column 1, and the vapor passed through the column is liquefied in a condenser 2, and introduced to a distributor 3, from which part of the liquid is recirculated via a reflux circuit 4 into the rectifying column 3, and another part of the liquid is recovered through a distillate circuit. Here, according to the reaction temperature, and reflux ratio is set low (below 1.0) at the initial stage. This reflux ratio is altered stepwise or continuously at least twice with the temperature rise, and set at infinity, i.e., total reflux, when the overhead temperature of the column exceeds 70°C.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6460380A JPS56161421A (en) | 1980-05-15 | 1980-05-15 | Production of polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6460380A JPS56161421A (en) | 1980-05-15 | 1980-05-15 | Production of polyester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56161421A true JPS56161421A (en) | 1981-12-11 |
Family
ID=13262990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6460380A Pending JPS56161421A (en) | 1980-05-15 | 1980-05-15 | Production of polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56161421A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61243816A (en) * | 1985-04-22 | 1986-10-30 | Mitsui Toatsu Chem Inc | Production of amino resin |
| WO2012090746A1 (en) * | 2010-12-27 | 2012-07-05 | 東レ株式会社 | Apparatus for production of aromatic polyester, and process for production of aromatic polyester |
| CN102718953A (en) * | 2012-07-05 | 2012-10-10 | 江苏申久化纤有限公司 | Process for automatically regulating EG (ethylene glycol) reflux ratio of esterification kettle in polyester production |
| CN110691799A (en) * | 2017-06-05 | 2020-01-14 | 株式会社普利司通 | Composition for producing polyurethane foam, and sound-absorbing member |
-
1980
- 1980-05-15 JP JP6460380A patent/JPS56161421A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61243816A (en) * | 1985-04-22 | 1986-10-30 | Mitsui Toatsu Chem Inc | Production of amino resin |
| WO2012090746A1 (en) * | 2010-12-27 | 2012-07-05 | 東レ株式会社 | Apparatus for production of aromatic polyester, and process for production of aromatic polyester |
| JP5811084B2 (en) * | 2010-12-27 | 2015-11-11 | 東レ株式会社 | Aromatic polyester production apparatus and method for producing aromatic polyester |
| CN102718953A (en) * | 2012-07-05 | 2012-10-10 | 江苏申久化纤有限公司 | Process for automatically regulating EG (ethylene glycol) reflux ratio of esterification kettle in polyester production |
| CN110691799A (en) * | 2017-06-05 | 2020-01-14 | 株式会社普利司通 | Composition for producing polyurethane foam, and sound-absorbing member |
| CN110691799B (en) * | 2017-06-05 | 2023-01-17 | 株式会社亚科迈 | Composition for producing polyurethane foam, and sound-absorbing member |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| PH28387A (en) | Process and apparatus | |
| CA2087607A1 (en) | Bioreactor | |
| ES468609A1 (en) | Process for preparing poly(ethylene terephthalate) | |
| JPS5322582A (en) | Production of polyethylene | |
| JPS56161421A (en) | Production of polyester | |
| JPS56118420A (en) | Production of polyester | |
| JPS5556120A (en) | Continuous preparation of polyester | |
| JPS56163122A (en) | Production of polyester | |
| US3325532A (en) | Manufacture of adiponitrile | |
| JPH06298702A (en) | Production of methyl methacrylate | |
| JPS5640645A (en) | Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the same | |
| GB1473671A (en) | Process for the production of a diol | |
| JPS5450592A (en) | Preparation of polyester | |
| JPS5257135A (en) | Esterification process | |
| JPS5744624A (en) | Apparatus for solid phase polymerization of polyester | |
| JPS55100326A (en) | Preparation of omega-alken-1-ol | |
| JPS5312833A (en) | Preparation of dimethylterephthalate | |
| JPS56112925A (en) | Production of polyester | |
| JPS5579005A (en) | Purification of crude product | |
| JPS5683421A (en) | Extractive distillation process | |
| JPS5513132A (en) | Heat treatment of sludge | |
| JPS5271591A (en) | Treatment of glycol | |
| JPS6471840A (en) | Esterification method | |
| JPS52140595A (en) | Polyester compounds | |
| JPS51136788A (en) | Continuo us process for preparing polyester using terephthalic acid |