GB630296A - Improvements in or relating to the manufacture of aminoguanidine compounds - Google Patents
Improvements in or relating to the manufacture of aminoguanidine compoundsInfo
- Publication number
- GB630296A GB630296A GB1363747A GB1363747A GB630296A GB 630296 A GB630296 A GB 630296A GB 1363747 A GB1363747 A GB 1363747A GB 1363747 A GB1363747 A GB 1363747A GB 630296 A GB630296 A GB 630296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- sulphate
- solution
- bicarbonate
- aminoguanidine
- 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
- C07C281/00—Derivatives of carbonic acid containing functional groups covered by groups C07C269/00 - C07C279/00 in which at least one nitrogen atom of these functional groups is further bound to another nitrogen atom not being part of a nitro or nitroso group
- C07C281/16—Compounds containing any of the groups, e.g. aminoguanidine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aminoguanidine sulphate is prepared by progressively introducing zinc into a suspension of nitroguanidine in an aqueous solution of ammonium sulphate until reduction to the stage of aminoguanidine sulphate is completed while maintaining the reaction temperature not above 30 DEG C., and mechanically separating the oxidized zinc sludge formed during the reaction from the resulting solution of aminoguanidine sulphate. The sulphate may be isolated from the solution but, preferably, the solution is treated with a soluble bicarbonate so as to precipitate the aminoguanidine as its bicarbonate; the bicarbonate may be formed free from contamination with soluble zinc compounds, by adding to the sludge-free solution ammonia and a soluble bicarbonate, the ammonia being used in amount at least sufficient to retain any soluble zinc products in solution on subsequent addition of the soluble bicarbonate. The reduction is preferably effected with zinc powder at a temperature not above 25 DEG C., using an amount of ammonium sulphate chemically approximately equivalent to that of the zinc which is itself present in small excess. Nitrosoguanidine is formed in an intermediate stage. Desirably an acid, such as sulphuric acid, is added progressively as reduction proceeds so as to maintain a pH of about 7.5. The zinc sludge is filtered off and washed, the washings being used to make up fresh ammonium sulphate solutions. Examples are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1363747A GB630296A (en) | 1947-05-21 | 1947-05-21 | Improvements in or relating to the manufacture of aminoguanidine compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1363747A GB630296A (en) | 1947-05-21 | 1947-05-21 | Improvements in or relating to the manufacture of aminoguanidine compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB630296A true GB630296A (en) | 1949-10-10 |
Family
ID=10026646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1363747A Expired GB630296A (en) | 1947-05-21 | 1947-05-21 | Improvements in or relating to the manufacture of aminoguanidine compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB630296A (en) |
-
1947
- 1947-05-21 GB GB1363747A patent/GB630296A/en not_active Expired
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