JPS5640645A - Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the same - Google Patents
Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the sameInfo
- Publication number
- JPS5640645A JPS5640645A JP11622479A JP11622479A JPS5640645A JP S5640645 A JPS5640645 A JP S5640645A JP 11622479 A JP11622479 A JP 11622479A JP 11622479 A JP11622479 A JP 11622479A JP S5640645 A JPS5640645 A JP S5640645A
- Authority
- JP
- Japan
- Prior art keywords
- same
- rectifying column
- reflux
- reactor
- titled compound
- 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: To obtain the titled compound useful as a raw material for PET at a high reaction rate economically, by esterifying terephthalic acid with ethylene glycol batchwise while retaining part of the reflux from a rectifying column between the bottom of the rectifying column and a reactor.
CONSTITUTION: Terephthalic acid is esterified with ethylene glycol (hereinafter referred to as EG) batchwise in an esterification reactor 3 with a rectifying column 7 while retaining part of the reflux in a reflux retaining pot 12 provided between the rectifying column 7 and the reactor 3 to give the titled compound. The pot 12 is characterized by an overflow line 14, a reflux line leading the retained EG to the reactor 3 and a reflux line 16 connecting to the rectifying column 17. The titled compound with a low content of diethylene glycol can be obtained stably, and the method and the apparatus are effective for measures of energy conservation and resource saving.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11622479A JPS5640645A (en) | 1979-09-12 | 1979-09-12 | Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11622479A JPS5640645A (en) | 1979-09-12 | 1979-09-12 | Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5640645A true JPS5640645A (en) | 1981-04-16 |
| JPS6217584B2 JPS6217584B2 (en) | 1987-04-18 |
Family
ID=14681895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11622479A Granted JPS5640645A (en) | 1979-09-12 | 1979-09-12 | Preparation of bis-beta-hydroxyethyl terephthalate and low- molecular condensate of the same and apparatus for preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5640645A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01317622A (en) * | 1988-06-20 | 1989-12-22 | Kawasaki Steel Corp | Roll straightening machine for shape steel |
| JPH0557350A (en) * | 1991-08-28 | 1993-03-09 | Nippon Steel Corp | Roll pitch variable roller leveler |
| US7385075B2 (en) | 2000-11-13 | 2008-06-10 | Basf Aktiengesellschaft | Method for producing esters of multibasic acids |
-
1979
- 1979-09-12 JP JP11622479A patent/JPS5640645A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01317622A (en) * | 1988-06-20 | 1989-12-22 | Kawasaki Steel Corp | Roll straightening machine for shape steel |
| JPH0557350A (en) * | 1991-08-28 | 1993-03-09 | Nippon Steel Corp | Roll pitch variable roller leveler |
| US7385075B2 (en) | 2000-11-13 | 2008-06-10 | Basf Aktiengesellschaft | Method for producing esters of multibasic acids |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6217584B2 (en) | 1987-04-18 |
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