JPS57130960A - Purification of dimethylformamide - Google Patents

Purification of dimethylformamide

Info

Publication number
JPS57130960A
JPS57130960A JP1726481A JP1726481A JPS57130960A JP S57130960 A JPS57130960 A JP S57130960A JP 1726481 A JP1726481 A JP 1726481A JP 1726481 A JP1726481 A JP 1726481A JP S57130960 A JPS57130960 A JP S57130960A
Authority
JP
Japan
Prior art keywords
formic acid
dmf
dimethylformamide
raw
reusable
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
Application number
JP1726481A
Other languages
Japanese (ja)
Other versions
JPS5857421B2 (en
Inventor
Masaru Tamura
Hiroyasu Maruyama
Keiichi Asama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Spinning Co Ltd
Original Assignee
Fuji Spinning Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Spinning Co Ltd filed Critical Fuji Spinning Co Ltd
Priority to JP56017264A priority Critical patent/JPS5857421B2/en
Publication of JPS57130960A publication Critical patent/JPS57130960A/en
Publication of JPS5857421B2 publication Critical patent/JPS5857421B2/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To purify raw hydrous dimethylformamide into high-purity dimethyl-formamide reusable with reduced formic acid concentration, by adding an amino compound to the raw hydrous dimethylformamide containing formic acid as an impurity upto a neutralization point, followed by distillation.
CONSTITUTION: A raw hydrous dimethylformamide (referred to as DMF hereinafter) containing formic acid as an impurity is partially hydrolyzed to prepare dimethylamine and formic acid, to the raw hydrous DMF an amino compound such as a primary amine (e.g., isopropylamine) shown by the formulaIis added until a neutralization point is attained, formic acid is converted into a reaction product shown by the formula II which is removed out of the system, and the resulted MDF is distilled to give high-purity DMF. During the distillation, formic acid is changed into a salt having good thermal stability, an acid, a high-boiling component, is suppressed to reduce decomposition, and bumping will not occur. The concentration of formic acid is reduced to ≤1g/l, DMF reusable for preparing polyuretheane elastic fiber, etc. is prepared.
COPYRIGHT: (C)1982,JPO&Japio
JP56017264A 1981-02-06 1981-02-06 Purification method of dimethylformamide Expired JPS5857421B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56017264A JPS5857421B2 (en) 1981-02-06 1981-02-06 Purification method of dimethylformamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56017264A JPS5857421B2 (en) 1981-02-06 1981-02-06 Purification method of dimethylformamide

Publications (2)

Publication Number Publication Date
JPS57130960A true JPS57130960A (en) 1982-08-13
JPS5857421B2 JPS5857421B2 (en) 1983-12-20

Family

ID=11939103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56017264A Expired JPS5857421B2 (en) 1981-02-06 1981-02-06 Purification method of dimethylformamide

Country Status (1)

Country Link
JP (1) JPS5857421B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108299190A (en) * 2018-03-07 2018-07-20 福州大学 A kind of method of separation and azeotropic system
CN111606822A (en) * 2020-05-25 2020-09-01 安徽金禾实业股份有限公司 Method for recovering acidic DMF (dimethyl formamide) in sucralose production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0532550U (en) * 1991-09-26 1993-04-27 東洋化学株式会社 Mounting structure for eaves trough mounting bracket

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128316A (en) * 1976-04-21 1977-10-27 Hitachi Shipbuilding Eng Co Method of removing formic acid in process of recovering purificating dimethyl formamide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128316A (en) * 1976-04-21 1977-10-27 Hitachi Shipbuilding Eng Co Method of removing formic acid in process of recovering purificating dimethyl formamide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108299190A (en) * 2018-03-07 2018-07-20 福州大学 A kind of method of separation and azeotropic system
CN111606822A (en) * 2020-05-25 2020-09-01 安徽金禾实业股份有限公司 Method for recovering acidic DMF (dimethyl formamide) in sucralose production

Also Published As

Publication number Publication date
JPS5857421B2 (en) 1983-12-20

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