GB815841A - Separation of guanidine values - Google Patents
Separation of guanidine valuesInfo
- Publication number
- GB815841A GB815841A GB35780/56A GB3578056A GB815841A GB 815841 A GB815841 A GB 815841A GB 35780/56 A GB35780/56 A GB 35780/56A GB 3578056 A GB3578056 A GB 3578056A GB 815841 A GB815841 A GB 815841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guanidine
- ammonium
- thiocyanate
- tetraborate
- boric 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
- C07C277/00—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
- C07C277/08—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups of substituted guanidines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C277/00—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
- C07C279/04—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of guanidine groups bound to acyclic carbon atoms of a carbon skeleton
-
- 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
Guanidine values are recovered from an aqueous mixture comprising a guanidine salt, ammonium salts and melamine by a modification of the method described in the parent Specification which comprises the steps of adding to said mixture borate ions and an excess of ammonium ions to provide a crystalline precipitate of substantially pure guanidine tetraborate and separating said precipitate. The borate ions may be provided by the addition of boric acid and the ammonium ions by passing gaseous ammonia through the aqueous mixture. The guanidine tetraborate may be converted to other guanidine salts by treatment with the appropriate acid, e.g. the sulphate using dilute sulphuric acid, and the boric acid recovered may be re-used. The products of fusion of ammonium thiocyanate, comprising guanidine thiocyanate, ammonium thiocyanate, thiourea and melamine, in 2 to 80 per cent, preferably 20 to 60 per cent, solution may be treated with 0.1 to 2.1 mols. of boric acid per mol. of guanidine, the mixture heated to 70 DEG C. while ammonia is passed through until a pH of 7.5 is attained and the solution then cooled slowly to 15 DEG C. and the white crystalline solid centrifuged and washed with water at 70 DEG C. The process may be also used where the hydrochloride, sulphate, sulphamate or carbamate of guanidine is present with ammonium salts. Detailed examples of the recovery of guanidine tetraborate from ammonium thiocyanate fusion products by the above method are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US815841XA | 1956-10-08 | 1956-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB815841A true GB815841A (en) | 1959-07-01 |
Family
ID=22165074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35780/56A Expired GB815841A (en) | 1956-10-08 | 1956-11-22 | Separation of guanidine values |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB815841A (en) |
-
1956
- 1956-11-22 GB GB35780/56A patent/GB815841A/en not_active Expired
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