ES252396A1 - Improvements in and relating to the preparation of dichloro-or trichloro-cyanuric acid or mixtures thereof - Google Patents
Improvements in and relating to the preparation of dichloro-or trichloro-cyanuric acid or mixtures thereofInfo
- Publication number
- ES252396A1 ES252396A1 ES0252396A ES252396A ES252396A1 ES 252396 A1 ES252396 A1 ES 252396A1 ES 0252396 A ES0252396 A ES 0252396A ES 252396 A ES252396 A ES 252396A ES 252396 A1 ES252396 A1 ES 252396A1
- Authority
- ES
- Spain
- Prior art keywords
- cyanuric acid
- alkali
- stage
- acid
- mixture
- 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
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Di- or tri-chlorocyanuric acid, or a mixture thereof, is prepared by reacting cyanuric acid, alkali, and chlorine in water maintained at a pH not exceeding 9 and 5 - 40 DEG C., the ratio of equivalents of alkali to mols. of cyanuric acid corresponding to the numebr of Cl atoms to be attached to each cyanuric acid molecule, and recovering from the mixture at a pH adjusted to 1,5 to 3,5 the precipitated chlorinated cyanuric acid. By maintaining a pH 1,5 to 3,5, the reaction may be carried out continuously, in a single stage. The alkali may be alkali metal hydroxide, e.g. NaOH, although carbonates are also mentioned. The cyanuric acid is used as a slurry in the aqueous alkali. Alternatively, the reaction may be effected continuously in two stages, wherein alkali and cyanuric acid are added to the first stage, maintained at pH5-9 and 5 DEG -40 DEG C., together with only part of the required Cl2, and a portion of the mixture is fed to the second stage, maintained at pH 1,5-3,5 and 5 DEG -20 DEG C. together with at least sufficient additional Cl2 to form the desired product. The gases from the second stage may be used in the first with additional Cl2. In preparing dichlorocyanuric acid, half the total Cl2 requirement is used in the first stage, while for trichlorocyanuric acid the proportion is 60 - 65%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US76750958A | 1958-10-16 | 1958-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES252396A1 true ES252396A1 (en) | 1960-01-16 |
Family
ID=25079722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0252396A Expired ES252396A1 (en) | 1958-10-16 | 1959-10-02 | Improvements in and relating to the preparation of dichloro-or trichloro-cyanuric acid or mixtures thereof |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH384583A (en) |
| DE (1) | DE1165035B (en) |
| ES (1) | ES252396A1 (en) |
| GB (1) | GB902539A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3758463A (en) * | 1970-12-29 | 1973-09-11 | Fmc Corp | Dichloroisocyanurate manufacture |
| FR2402650A1 (en) * | 1977-09-08 | 1979-04-06 | Chlor Chem Ltd | CONTINUOUS PROCESS FOR THE PRODUCTION OF DI- OR TRICHLOROCYANURIC ACID BY CHLORINATION OF SODIUM CYANURATE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE551308A (en) * | 1955-05-09 |
-
1959
- 1959-10-02 DE DE1959F0029522 patent/DE1165035B/en active Pending
- 1959-10-02 ES ES0252396A patent/ES252396A1/en not_active Expired
- 1959-10-14 GB GB3475659A patent/GB902539A/en not_active Expired
- 1959-10-15 CH CH7948059A patent/CH384583A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1165035B (en) | 1964-03-12 |
| GB902539A (en) | 1962-08-01 |
| CH384583A (en) | 1964-11-30 |
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