GB1268655A - Discontinuous production of alkali metal salts of nitrilotriacetic acid - Google Patents
Discontinuous production of alkali metal salts of nitrilotriacetic acidInfo
- Publication number
- GB1268655A GB1268655A GB40917/69A GB4091769A GB1268655A GB 1268655 A GB1268655 A GB 1268655A GB 40917/69 A GB40917/69 A GB 40917/69A GB 4091769 A GB4091769 A GB 4091769A GB 1268655 A GB1268655 A GB 1268655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- nitrilotriacetic acid
- metal salts
- acid
- formaldehyde
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/12—Formation of amino and carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C229/24—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having more than one carboxyl group bound to the carbon skeleton, e.g. aspartic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,268,655. Alkali metal salts of nitrilotriacetic acid. BADISCHE ANILIN- & SODA-FABRIK A.G. 15 Aug., 1969 [17 Aug., 1968], No. 40917/69. Addition to 1,224,043. Heading C2C. Alkali metal salts of nitrilotriacetic acid are prepared by a two stage process, without continuous flow of reaction mixture through the process, in the first stage of which an alkali metal cyanide is reacted with formaldehyde in a stoichiometric ratio at a temperature of from 50 to 200 C. and a pressure of from 2 to 50 atmospheres gauge in the presence of excess ammonia to give a solution containing aminoacetate as the principal organic acid anion, decompressing the resultant solution to atmospheric pressure and treating it in one or more further stages with further alkali metal cyanide and formaldehyde at a temperature of from 60 to 110 C. whilst simultaneously removing ammonia to convert the aminoacetic acid into nitrilotriacetic acid. The different stages are preferably effected in separate vessels and the final product may be recovered from the aqueous solution by evaporation or spray drying.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681793227 DE1793227C3 (en) | 1968-08-17 | Process for the discontinuous production of alkali salts of nitrilotriacetic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1268655A true GB1268655A (en) | 1972-03-29 |
Family
ID=5707622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40917/69A Expired GB1268655A (en) | 1968-08-17 | 1969-08-15 | Discontinuous production of alkali metal salts of nitrilotriacetic acid |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT288344B (en) |
| BE (1) | BE737490A (en) |
| CH (1) | CH501591A (en) |
| GB (1) | GB1268655A (en) |
| NL (1) | NL6912479A (en) |
| SE (1) | SE364259B (en) |
-
1969
- 1969-08-06 AT AT758269A patent/AT288344B/en not_active IP Right Cessation
- 1969-08-06 CH CH1193569A patent/CH501591A/en not_active IP Right Cessation
- 1969-08-13 SE SE11260/69A patent/SE364259B/xx unknown
- 1969-08-14 BE BE737490D patent/BE737490A/xx unknown
- 1969-08-15 NL NL6912479A patent/NL6912479A/xx unknown
- 1969-08-15 GB GB40917/69A patent/GB1268655A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE364259B (en) | 1974-02-18 |
| DE1793227B2 (en) | 1975-10-23 |
| DE1793227A1 (en) | 1972-03-09 |
| CH501591A (en) | 1971-01-15 |
| BE737490A (en) | 1970-02-16 |
| NL6912479A (en) | 1970-02-19 |
| AT288344B (en) | 1971-02-25 |
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