GB1254326A - Method of preparing nitrilotriacetonitrile or methylene-bis-iminodiacetonitrile or mixtures thereof - Google Patents
Method of preparing nitrilotriacetonitrile or methylene-bis-iminodiacetonitrile or mixtures thereofInfo
- Publication number
- GB1254326A GB1254326A GB378069A GB378069A GB1254326A GB 1254326 A GB1254326 A GB 1254326A GB 378069 A GB378069 A GB 378069A GB 378069 A GB378069 A GB 378069A GB 1254326 A GB1254326 A GB 1254326A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitrilotriacetonitrile
- iminodiacetonitrile
- bis
- methylene
- mixtures
- 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
1,254,326. Nitrilotriacetonitrile and methylene-bis-iminodiacetonitrile. STAUFFER CHEMICAL CO. 23 Jan., 1969 [25 Jan., 1968], No. 3780/69. Heading C2C. Nitrilotriacetonitrile or methylene-bis-iminodiacetonitrile or mixtures thereof are prepared by adding ammonia and hydrogen cyanide simultaneously to acidified liquid phase formaldehyde maintained at a pH between 0 and 2, the temperature being controlled between 10‹ and 40‹ C. to produce methylene-bis-iminodiacetonitrile or a preponderance thereof or between 10‹ and 100‹ C. (and over 40‹ C. in at least the later period of reaction) to produce nitrilotriacetonitrile or a preponderance thereof. When it is desired to produce nitrilotriacetonitrile or mixtures in which this preponderates, the temperature during the addition of hydrogen cyanide and ammonia is desirably maintained between 30‹ and 35‹ C. and thereafter the temperature is maintained between 60‹ and 65‹ C. The temperature is preferably maintained at 30‹ to 40‹ C. throughout when it is desired to produce methylene-bis-imino-diacetonitrile or mixtures in which this preponderates. Methylenebis-iminodiacetonitrile may be converted to nitrilotriacetonitrile by reaction with liquid hydrogen cyanide and formaldehyde at temperatures of 50‹ to 95‹ C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70038268A | 1968-01-25 | 1968-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1254326A true GB1254326A (en) | 1971-11-17 |
Family
ID=24813279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB378069A Expired GB1254326A (en) | 1968-01-25 | 1969-01-23 | Method of preparing nitrilotriacetonitrile or methylene-bis-iminodiacetonitrile or mixtures thereof |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE727370A (en) |
| CH (1) | CH506492A (en) |
| DE (1) | DE1902934A1 (en) |
| FR (1) | FR2000759A1 (en) |
| GB (1) | GB1254326A (en) |
| NL (1) | NL6900953A (en) |
| SE (2) | SE364703B (en) |
-
1969
- 1969-01-21 NL NL6900953A patent/NL6900953A/xx unknown
- 1969-01-22 DE DE19691902934 patent/DE1902934A1/en active Pending
- 1969-01-23 GB GB378069A patent/GB1254326A/en not_active Expired
- 1969-01-24 FR FR6901454A patent/FR2000759A1/fr not_active Withdrawn
- 1969-01-24 BE BE727370D patent/BE727370A/xx unknown
- 1969-01-24 SE SE1466771A patent/SE364703B/xx unknown
- 1969-01-24 SE SE97969A patent/SE365208B/xx unknown
- 1969-01-27 CH CH119969A patent/CH506492A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BE727370A (en) | 1969-07-24 |
| FR2000759A1 (en) | 1969-09-12 |
| SE365208B (en) | 1974-03-18 |
| DE1902934A1 (en) | 1969-09-04 |
| SE364703B (en) | 1974-03-04 |
| NL6900953A (en) | 1969-07-29 |
| CH506492A (en) | 1971-04-30 |
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