GB1132046A - Improvements in or relating to the purification of dimethylformamide - Google Patents
Improvements in or relating to the purification of dimethylformamideInfo
- Publication number
- GB1132046A GB1132046A GB48824/68A GB4882465A GB1132046A GB 1132046 A GB1132046 A GB 1132046A GB 48824/68 A GB48824/68 A GB 48824/68A GB 4882465 A GB4882465 A GB 4882465A GB 1132046 A GB1132046 A GB 1132046A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimethylformamide
- nov
- resins
- purified
- exchange resin
- 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.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
- D01F13/04—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of synthetic polymers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
1,132,046. Purification of dimethylformamide. SNIA VISCOSA SOC. NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA S.p.A. 17 Nov., 1965 [26 Nov., 1964], No. 48824/65. Heading C2C. [Also in Division C3] Dimethylformamide which has been recovered in a substantially non-aqueous condition from a process for spinning acrylonitrile polymers and copolymers, is purified for reuse by contact with a mixed bed of a strongly acidic ion-exchange resin belonging to the sulphonated styrenedivinyl benzene copolymer class and a strongly basic ion-exchange resin belonging to the quaternary ammonium hydroxide class, both resins being insoluble in dimethylformamide. It is preferred to effect contact between the dimethylformamide and the resins at ambient temperatures and pressures at a downward flow rate of 5-10 litres per hour per litre of resin. The purified dimethylformamide provides an improved polymerization medium for acrylonitrile (see Division C3).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2532064 | 1964-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1132046A true GB1132046A (en) | 1968-10-30 |
Family
ID=11216327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB48824/68A Expired GB1132046A (en) | 1964-11-26 | 1965-11-17 | Improvements in or relating to the purification of dimethylformamide |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE672836A (en) |
| DE (1) | DE1493122A1 (en) |
| ES (1) | ES319989A1 (en) |
| FR (1) | FR1464173A (en) |
| GB (1) | GB1132046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470997A (en) * | 2020-04-26 | 2020-07-31 | 安庆市鑫祥瑞环保科技有限公司 | Method for recovering DMF waste liquid |
-
1965
- 1965-11-17 GB GB48824/68A patent/GB1132046A/en not_active Expired
- 1965-11-23 FR FR39454A patent/FR1464173A/en not_active Expired
- 1965-11-25 ES ES0319989A patent/ES319989A1/en not_active Expired
- 1965-11-25 BE BE672836D patent/BE672836A/xx unknown
- 1965-11-25 DE DE19651493122 patent/DE1493122A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470997A (en) * | 2020-04-26 | 2020-07-31 | 安庆市鑫祥瑞环保科技有限公司 | Method for recovering DMF waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| ES319989A1 (en) | 1966-04-01 |
| BE672836A (en) | 1966-05-25 |
| DE1493122A1 (en) | 1969-03-13 |
| FR1464173A (en) | 1966-12-30 |
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