GB809410A - Improved method for the preparation of n-methyleneglycino-nitrile - Google Patents
Improved method for the preparation of n-methyleneglycino-nitrileInfo
- Publication number
- GB809410A GB809410A GB3634257A GB3634257A GB809410A GB 809410 A GB809410 A GB 809410A GB 3634257 A GB3634257 A GB 3634257A GB 3634257 A GB3634257 A GB 3634257A GB 809410 A GB809410 A GB 809410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cyanide
- mols
- mol
- formaldehyde
- excess
- 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
Abstract
N-methyleneglycinonitrile is prepared by simultaneously adding substantially 2 mols. of formaldehyde and substantially 1 mol. of an alkali metal cyanide to an excess proportionate quantity of from more than 1 to substantially 2 mols. of an ammonium halide in aqueous solution at a temperature of from - 20 DEG to 10 DEG C., preferably 0-10 DEG C., while maintaining the reaction mass at a pH below 6, and subsequently recovering N-methyleneglycinonitrile. Preferably the acidity is maintained by the addition, towards the termination of the reaction, of a water-soluble non-reactive carboxylic acid, such as acetic acid in amount at least 0.05 mol. per cent based on the alkali metal cyanide. The preferred proportionate quantity of ammonium halide is substantially 1.4 mols. Preferably the formaldehyde and cyanide are continuously added so as to provide a slight excess of formaldehyde over its required 2 : 1 molar ratio with respect to the cyanide, e.g. at least a 5 mol. per cent excess. Preferred reactants are sodium cyanide and ammonium chloride. The product normally precipitates as a crystalline substance and may be separated by filtration, decantation, or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3634257A GB809410A (en) | 1957-11-21 | 1957-11-21 | Improved method for the preparation of n-methyleneglycino-nitrile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3634257A GB809410A (en) | 1957-11-21 | 1957-11-21 | Improved method for the preparation of n-methyleneglycino-nitrile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB809410A true GB809410A (en) | 1959-02-25 |
Family
ID=10387270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3634257A Expired GB809410A (en) | 1957-11-21 | 1957-11-21 | Improved method for the preparation of n-methyleneglycino-nitrile |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB809410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0280174A2 (en) * | 1987-02-20 | 1988-08-31 | Hitachi, Ltd. | Compounds having schiff bonds, polymers thereof,and process for preparing the same |
| US6496831B1 (en) * | 1999-03-25 | 2002-12-17 | Lucent Technologies Inc. | Real-time event processing system for telecommunications and other applications |
| US6681230B1 (en) * | 1999-03-25 | 2004-01-20 | Lucent Technologies Inc. | Real-time event processing system with service authoring environment |
-
1957
- 1957-11-21 GB GB3634257A patent/GB809410A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0280174A2 (en) * | 1987-02-20 | 1988-08-31 | Hitachi, Ltd. | Compounds having schiff bonds, polymers thereof,and process for preparing the same |
| EP0280174A3 (en) * | 1987-02-20 | 1988-11-30 | Hitachi, Ltd. | Compounds having schiff bonds, polymers thereof,and process for preparing the same |
| US4900807A (en) * | 1987-02-20 | 1990-02-13 | Hitachi, Ltd. | Polymer from nitrile terminated compounds having Schiff bonds and process for preparing the same |
| US6496831B1 (en) * | 1999-03-25 | 2002-12-17 | Lucent Technologies Inc. | Real-time event processing system for telecommunications and other applications |
| US6681230B1 (en) * | 1999-03-25 | 2004-01-20 | Lucent Technologies Inc. | Real-time event processing system with service authoring environment |
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