JPS56104881A - Preparation of tetrahydrofuran for polytetramethylene glycol - Google Patents
Preparation of tetrahydrofuran for polytetramethylene glycolInfo
- Publication number
- JPS56104881A JPS56104881A JP684180A JP684180A JPS56104881A JP S56104881 A JPS56104881 A JP S56104881A JP 684180 A JP684180 A JP 684180A JP 684180 A JP684180 A JP 684180A JP S56104881 A JPS56104881 A JP S56104881A
- Authority
- JP
- Japan
- Prior art keywords
- tetrahydrofuran
- producing
- polyester
- alkali metal
- polybutylene terephthalate
- 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
- Furan Compounds (AREA)
Abstract
PURPOSE: To reduce the content of aldehyde compounds which are the cause of discoloration and to obtain the titled high-purity compound industrially advantegeouly, treating tetrahydrofuran prepared from a specific process for producing a polyester as a by product with an alkali metal hydroxide, followed by distillation.
CONSTITUTION: In a process for producing a polyester comprising 1,4-butanediol as a main glycol component, e.g., a process for producing polybutylene terephthalate, polybutylene terephthalate.isophthalate, etc., tetrahydrofuran prepaed as a by- product is heat-treated with preferably 20W200wt% based on tetrahydrofuran alkali metal hydroxide, e.g., sodium hydroxide at from 40°CW its boiling point, and distilled so that the content of aldehyde compounds based on tetrahydrofuran is reduced to not more than 200ppm, preferably not more than 120ppm.
EFFECT: A useful sustance can be recovered from a distillate which was abolished before, and simultaneously problems of environmental pollution and nuisance can be dissolved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP684180A JPS56104881A (en) | 1980-01-25 | 1980-01-25 | Preparation of tetrahydrofuran for polytetramethylene glycol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP684180A JPS56104881A (en) | 1980-01-25 | 1980-01-25 | Preparation of tetrahydrofuran for polytetramethylene glycol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56104881A true JPS56104881A (en) | 1981-08-20 |
Family
ID=11649461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP684180A Pending JPS56104881A (en) | 1980-01-25 | 1980-01-25 | Preparation of tetrahydrofuran for polytetramethylene glycol |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56104881A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044975A1 (en) * | 1998-03-05 | 1999-09-10 | Basf Aktiengesellschaft | Method for distilling mixtures containing butanediol |
| WO2005116111A1 (en) * | 2004-05-11 | 2005-12-08 | Zimmer Aktiengesellschaft | Method for producing elastomeric copolyesters |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4976861A (en) * | 1972-12-01 | 1974-07-24 |
-
1980
- 1980-01-25 JP JP684180A patent/JPS56104881A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4976861A (en) * | 1972-12-01 | 1974-07-24 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044975A1 (en) * | 1998-03-05 | 1999-09-10 | Basf Aktiengesellschaft | Method for distilling mixtures containing butanediol |
| WO2005116111A1 (en) * | 2004-05-11 | 2005-12-08 | Zimmer Aktiengesellschaft | Method for producing elastomeric copolyesters |
| EA009917B1 (en) * | 2004-05-11 | 2008-04-28 | Лурги Циммер Гмбх | Method for producing elastomeric copolyesters |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS53116314A (en) | Separation of acetic acid and water | |
| JPS5615220A (en) | Production of high-purity isobutylene | |
| JPS56104881A (en) | Preparation of tetrahydrofuran for polytetramethylene glycol | |
| JPS52106244A (en) | Program module control system | |
| JPS5219611A (en) | Process for recovery of butanediol and/ or butenediol | |
| JPS5283315A (en) | Purification of acetic acid | |
| JPS5219610A (en) | Process for preparation of high purity butanediol | |
| JPS54135896A (en) | Preparation of polyester having improved transparency and color tone | |
| JPS5387305A (en) | Preparation of 1,4-butanediol and tetrahydrofuran | |
| JPS543194A (en) | Continuos production of polyester oligomer | |
| JPS5311993A (en) | Preparation of polyester | |
| JPS549203A (en) | Preparation of alpha-branched aliphatic carboxylic acid | |
| JPS5581826A (en) | Production of tetrahydrofuran and 1,4-butanediol | |
| JPS5239644A (en) | An esterification process | |
| JPS5439492A (en) | Preparation of polyester | |
| JPS5286496A (en) | Preparation of polyesters | |
| JPS5217437A (en) | Process for preparation of polytetramethyleneterephthalate oligomer | |
| JPS539714A (en) | Preparation of epoxy compounds | |
| JPS53105471A (en) | Preparation of cyclic ethers | |
| JPS5330653A (en) | Stabilization of halogen-containing resins | |
| JPS543150A (en) | 1,2-polybutadiene composition | |
| JPS5392711A (en) | Preparation of ester plasticizer | |
| JPS5387348A (en) | Method of purifying tetrahydrofuran | |
| JPS53113892A (en) | Preparation of polyester | |
| JPS53130654A (en) | Separation and purification of tetrahydrofuran |