GB661146A - Process for the production of alkali metal salts of nitrilotriacetic acid - Google Patents
Process for the production of alkali metal salts of nitrilotriacetic acidInfo
- Publication number
- GB661146A GB661146A GB25130/49A GB2513049A GB661146A GB 661146 A GB661146 A GB 661146A GB 25130/49 A GB25130/49 A GB 25130/49A GB 2513049 A GB2513049 A GB 2513049A GB 661146 A GB661146 A GB 661146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonia
- alkali metal
- formaldehyde
- reaction
- nitrilotriacetic acid
- 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
- C07C253/00—Preparation of carboxylic acid nitriles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Alkali metal salts of nitrilotriacetic acid are prepared by reacting alkali metal cyanides with ammonia and formaldehyde in an aqueous alkaline medium under reflux or under pressure, removing ammonia after the reaction and reacting the resulting liquid with an alkali metal cyanide and formaldehyde while heating and removing the ammonia formed during this stage of the reaction. The first stage of the reaction is carried out either in a closed vessel or under reflux and the reaction is preferably carried out at an elevated temperature. The amount of ammonia used may be between 0.5 and 3 molecular proportions with regard to one molecular proportion of the alkali metal cyanide or formaldehyde. In the first stage alkali metal salts of amino-, mono-, di- and tri-acetic acids are formed and the resulting reaction mixture is freed from ammonia. The solution freed from ammonia is then reacted with further amounts of alkali metal cyanide and formaldehyde in such a way that the ammonia formed is removed as quickly as possible. In the examples: (a) the sodium salt of nitrilotriacetic acid is prepared by reacting together ammonia, formaldehyde and sodium cyanide, and (b) the potassium salt of nitrilotriacetic acid is prepared by reacting together ammonia, formaldehyde and potassium cyanide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25130/49A GB661146A (en) | 1949-09-30 | 1949-09-30 | Process for the production of alkali metal salts of nitrilotriacetic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25130/49A GB661146A (en) | 1949-09-30 | 1949-09-30 | Process for the production of alkali metal salts of nitrilotriacetic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB661146A true GB661146A (en) | 1951-11-14 |
Family
ID=6588918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25130/49A Expired GB661146A (en) | 1949-09-30 | 1949-09-30 | Process for the production of alkali metal salts of nitrilotriacetic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB661146A (en) |
-
1949
- 1949-09-30 GB GB25130/49A patent/GB661146A/en not_active Expired
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