GB1206006A - Improvements in or relating to a process for producing cyanuric acid - Google Patents
Improvements in or relating to a process for producing cyanuric acidInfo
- Publication number
- GB1206006A GB1206006A GB406868A GB406868A GB1206006A GB 1206006 A GB1206006 A GB 1206006A GB 406868 A GB406868 A GB 406868A GB 406868 A GB406868 A GB 406868A GB 1206006 A GB1206006 A GB 1206006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rollers
- urea
- reaction
- cyanuric acid
- vessel
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
- C07D251/30—Only oxygen atoms
- C07D251/32—Cyanuric acid; Isocyanuric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,206,006. Cyanuric acid. SHIKOKU KASEI KOGYO CO. Ltd. 25 Jan., 1968, No. 4068/68. Addition to 1,076,934. Heading C1A. Cyanuric acid is produced by heating urea and/or biuret below 400‹ C. in a reaction vessel on the surface of a molten metal having a melting-point not exceeding 350‹ C., between two horizontal rollers, each rotating in either direction, partly immersed in the molten metal, until a solid mass is formed which is further heated on said surface or subsequently to obtain a solid product containing cyanuric acid. The preferred temperature is 230-350‹ C. Metals specified are Sn, Bi, Pb and alloys of Sn, Sb and Pb, and of Bi, Cd, Pb and Sn. Preferably the starting material is urea which is delivered on to the melt's surface R. The rollers 4 become coated with a film of the molten metal and prevent adhesion of the reaction mixture to the tank. In the preferred apparatus, illustrated in Fig. 2, molten urea is delivered from a storage tank 5 both on to the surface of the metal between the rollers and to troughs 7 whence it overflows on to the side areas of the surface and moves towards the beginning of the reaction surface R. The rollers 4 may be formed with helical screws to deliver the reaction mixture from one end of the vessel. The solid is continuously withdrawn from the vessel by rollers 8 and granulated by crusher 9, and heated in a heating tank. By-products are hydrolysed by heating in aqueous mineral acid. The reaction vessel is sealed so as to simplify the collection of ammonia evolved in the reaction, and so as to simplify the recovery of the urea entrained in the ammonia, preferably by condensation at 100-130‹ C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB406868A GB1206006A (en) | 1968-01-25 | 1968-01-25 | Improvements in or relating to a process for producing cyanuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB406868A GB1206006A (en) | 1968-01-25 | 1968-01-25 | Improvements in or relating to a process for producing cyanuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1206006A true GB1206006A (en) | 1970-09-23 |
Family
ID=9770132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB406868A Expired GB1206006A (en) | 1968-01-25 | 1968-01-25 | Improvements in or relating to a process for producing cyanuric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1206006A (en) |
-
1968
- 1968-01-25 GB GB406868A patent/GB1206006A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees | ||
| 427A | Application made for restoration (sect. 27/1949) | ||
| 728A | Order made restoring the patent (sect. 28/1977) |