GB1031047A - - Google Patents
Info
- Publication number
- GB1031047A GB1031047A GB901863A GB901863A GB1031047A GB 1031047 A GB1031047 A GB 1031047A GB 901863 A GB901863 A GB 901863A GB 901863 A GB901863 A GB 901863A GB 1031047 A GB1031047 A GB 1031047A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- thermal treatment
- urea
- ammonia
- raw
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
<PICT:1031047/C1/1> Cyanuric acid is made by a process comprising subjecting urea at a temperature of 170 DEG C. or below to a thermal treatment at temperatures between 220 DEG and 340 DEG C. to obtain raw cyanuric acid, and treating the raw acid by acid hydrolysis under pressure to hydrolyse amino derivatives formed during the thermal treatment. The ammonia evolved is recovered by absorption in the mother liquor from the acid hydrolysis and vaporized unreacted urea is recycled. In the embodiment described in relation to the drawing, urea is heated in vessel 1, fed into malaxators 3, then into (optional) finishing screw 10, the inner walls of the malaxators and the finishing screw being maintained at between 220 DEG and 340 DEG C. The raw cyanuric acid is poured into cooled screw exchanger 14, then fed to grinder 15, into aqueous acid in tank 18, into autoclave 24 for the hydrolysis step, and to filtering device 31 for separation of the pure cyanuric acid. The mother liquors pass to saturator 35 to absorb ammonia from the thermal treatment zones, then may be neutralized with more ammonia to recover the ammonium salt of the acid, for example nitric or phosphoric acid used in the hydrolysis step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR31004777 | 1962-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1031047A true GB1031047A (en) | 1966-05-25 |
Family
ID=9691892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB901863A Expired GB1031047A (en) | 1962-03-06 | 1963-03-06 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE629199A (en) |
| CH (1) | CH413849A (en) |
| DE (1) | DE1470140A1 (en) |
| GB (1) | GB1031047A (en) |
| LU (1) | LU43289A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2035792B1 (en) * | 1991-08-21 | 1993-12-16 | Patentes Novedades Sa | "INSTALLATION FOR THE OBTAINING OF CYANURIC ACID AND THE CORRESPONDING PROCEDURE" |
-
1963
- 1963-03-02 LU LU43289D patent/LU43289A1/xx unknown
- 1963-03-02 DE DE19631470140 patent/DE1470140A1/en active Pending
- 1963-03-05 CH CH276863A patent/CH413849A/en unknown
- 1963-03-05 BE BE629199A patent/BE629199A/en unknown
- 1963-03-06 GB GB901863A patent/GB1031047A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE629199A (en) | 1963-07-01 |
| CH413849A (en) | 1966-05-31 |
| LU43289A1 (en) | 1963-05-02 |
| DE1470140A1 (en) | 1969-04-17 |
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