GB654656A - An improved process for the preparation of dicyandiamide and melamine - Google Patents
An improved process for the preparation of dicyandiamide and melamineInfo
- Publication number
- GB654656A GB654656A GB19314/47A GB1931447A GB654656A GB 654656 A GB654656 A GB 654656A GB 19314/47 A GB19314/47 A GB 19314/47A GB 1931447 A GB1931447 A GB 1931447A GB 654656 A GB654656 A GB 654656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cyanamide
- melamine
- dicyandiamide
- cresol
- solution
- 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
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/16—Cyanamide; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Melamine is prepared by progressively introducing cyanamide as a solid, melted, or in solution into a relatively large mass of liquid which does not react with cyanamide, dicyandiamide or melamine, maintained at 150-350 DEG C., the boiling-point of the liquid preferably being within this range. Suitable liquids are saturated higher aliphatic hydrocarbons, tributylamine, diethylaniline, cresol, diphenyl, esters or ethers of glycols and silicones, but preferably phenyl ether or tetraline. Examples relate to molten cyanamide introduced into propanol, crystalline cyanamide into butoxol, a solution of cyanamide in ethyl acetate into either propanol or a silicone and a solution of cyanamide in cresol introduced into cresol. The cyanamide is preferably prepared according to Specification 636,600. Specification 562,331 also is referred to.ALSO:Dicyandiamide or melamine is prepared by progressively introducing cyanamide either in the solid state, melted, or in solution, into a relatively large mass of liquid which does not react with cyanamide, dicyandiamide or melamine, maintained at a temperature of 80-130 DEG C. for dimerization or 150-350 DEG C. for trimerization, the boiling point of the liquid preferably being within these ranges. Suitable liquids for dimerization are those containing at least one OH group such as aliphatic alcohols, particularly propanol and butanol, whilst tributylamine, diethylaniline, phenyl ether, tetraline, cresol, diphenyl, higher saturated aliphatic hydrocarbons, esters or ethers of glycols, and silicones may be used for trimerization. The cyanamide is preferably prepared in accordance with Specification 636,600. Specification 562,331, [Group IV], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR264905X | 1946-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB654656A true GB654656A (en) | 1951-06-27 |
Family
ID=8885403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19314/47A Expired GB654656A (en) | 1946-07-19 | 1947-07-18 | An improved process for the preparation of dicyandiamide and melamine |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE474692A (en) |
| CH (1) | CH264905A (en) |
| FR (1) | FR1002904A (en) |
| GB (1) | GB654656A (en) |
| NL (1) | NL67089C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3177215A (en) * | 1961-03-14 | 1965-04-06 | Standard Oil Co | Process for the production of melamine from hydrogen cyanide by way of cyanamide |
-
1946
- 1946-10-30 FR FR1002904D patent/FR1002904A/en not_active Expired
-
1947
- 1947-05-30 NL NL132482A patent/NL67089C/xx active
- 1947-07-18 BE BE474692D patent/BE474692A/xx unknown
- 1947-07-18 GB GB19314/47A patent/GB654656A/en not_active Expired
- 1947-07-19 CH CH264905D patent/CH264905A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3177215A (en) * | 1961-03-14 | 1965-04-06 | Standard Oil Co | Process for the production of melamine from hydrogen cyanide by way of cyanamide |
Also Published As
| Publication number | Publication date |
|---|---|
| BE474692A (en) | 1947-08-30 |
| CH264905A (en) | 1949-11-15 |
| NL67089C (en) | 1951-01-15 |
| FR1002904A (en) | 1952-03-12 |
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