GB772979A - Preparation of pure adiponitrile - Google Patents
Preparation of pure adiponitrileInfo
- Publication number
- GB772979A GB772979A GB23277/55A GB2327755A GB772979A GB 772979 A GB772979 A GB 772979A GB 23277/55 A GB23277/55 A GB 23277/55A GB 2327755 A GB2327755 A GB 2327755A GB 772979 A GB772979 A GB 772979A
- Authority
- GB
- United Kingdom
- Prior art keywords
- adiponitrile
- hydroxylamine
- treatment
- preparation
- sulphuric
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Adiponitrile contaminated with by-products is purified by heating it with a hydroxylamine salt of hydrochloric, nitric, sulphuric or phosphoric acid, or a hydroxylamine acid salt of sulphuric or phosphoric acid, and thereafter separating the adiponitrile from the reaction mixture. The impure adiponitrile may be subjected to an initial hydrolysis to convert imino groups in impurities to keto groups and the resulting aqueous solution may be used directly for the hydroxylamine treatment. The treatment temperature is preferably between 100 DEG and 250 DEG C. and the purified adiponitrile may be isolated from the treatment mixture by distillation or selective solvation. The examples describe the preparation of pure adiponitrile from the crude mixture obtained by catalytic hydrogenation of dicyanobutene. Specification 667,207 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US772979XA | 1954-09-13 | 1954-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB772979A true GB772979A (en) | 1957-04-17 |
Family
ID=22137258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23277/55A Expired GB772979A (en) | 1954-09-13 | 1955-08-12 | Preparation of pure adiponitrile |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB772979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109071421A (en) * | 2016-05-02 | 2018-12-21 | 英威达纺织（英国）有限公司 | The method for reducing the CPI in dintrile stream |
-
1955
- 1955-08-12 GB GB23277/55A patent/GB772979A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109071421A (en) * | 2016-05-02 | 2018-12-21 | 英威达纺织（英国）有限公司 | The method for reducing the CPI in dintrile stream |
| US11028045B2 (en) | 2016-05-02 | 2021-06-08 | Inv Nylon Chemicals Americas, Llc | Process for reducing CPI in a dinitrile stream |
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