ES2157173A1 - Treatment of liquid from the trichloroisocyanuric acid process consists of removal of active chlorine and addition of calcium ions, for neutralisation of the residual water - Google Patents
Treatment of liquid from the trichloroisocyanuric acid process consists of removal of active chlorine and addition of calcium ions, for neutralisation of the residual waterInfo
- Publication number
- ES2157173A1 ES2157173A1 ES009902676A ES9902676A ES2157173A1 ES 2157173 A1 ES2157173 A1 ES 2157173A1 ES 009902676 A ES009902676 A ES 009902676A ES 9902676 A ES9902676 A ES 9902676A ES 2157173 A1 ES2157173 A1 ES 2157173A1
- Authority
- ES
- Spain
- Prior art keywords
- removal
- addition
- active chlorine
- calcium ions
- neutralisation
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 3
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 title abstract 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 title abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title abstract 2
- 229910001424 calcium ion Inorganic materials 0.000 title abstract 2
- 239000000460 chlorine Substances 0.000 title abstract 2
- 229910052801 chlorine Inorganic materials 0.000 title abstract 2
- 229950009390 symclosene Drugs 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 title 1
- 238000006386 neutralization reaction Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 abstract 4
- 239000002351 wastewater Substances 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 2
- 159000000007 calcium salts Chemical class 0.000 abstract 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 2
- 239000011707 mineral Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000002594 sorbent Substances 0.000 abstract 1
Landscapes
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Un método para tratar aguas residuales obtenidas del proceso de ácido tricloroisocianúrico, que comprende, como primera etapa, la eliminación del cloro activo de las aguas residuales, seguido de la dición de iones de calcio, en cantidades de 1,2 a 3,0 moles por 1 mol de ácido cianúrico presente en las aguas residuales decloradas, preferiblemente en presencia de un hidróxido de metal alcalino, para lograr un pH mayor que 11. Se agita la mezcla resultante, y se separa la suspensión resultante de sales de calcio del ácido cianúrico, y se añade un ácido mineral para lograr una reacción ácida, y la temperatura se mantiene dentro de un intervalo de 40ºC a 100ºC, luego la mezcla se enfría y se separan cristales de ácido cianúrico. Las aguas residuales, libres de la suspensión de sales de calcio del ácido cianúrico, se neutralizan con un ácido mineral a un pH de 4,0-7,5, y luego se pasan a través de un lecho sorbente.A method for treating wastewater obtained from the trichloroisocyanuric acid process, comprising, as a first stage, the removal of active chlorine from the wastewater, followed by the addition of calcium ions, in amounts of 1.2 to 3.0 moles per 1 mol of cyanuric acid present in the dechlorinated wastewater, preferably in the presence of an alkali metal hydroxide, to achieve a pH greater than 11. The resulting mixture is stirred, and the resulting suspension of calcium salts of cyanuric acid is separated , and a mineral acid is added to achieve an acidic reaction, and the temperature is kept within a range of 40°C to 100°C, then the mixture is cooled and cyanuric acid crystals separate. The waste water, free from the suspension of calcium salts of cyanuric acid, is neutralized with a mineral acid to a pH of 4.0-7.5, and then passed through a sorbent bed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL33015998A PL330159A1 (en) | 1998-12-08 | 1998-12-08 | Method of treating waste effluents from production of trichloroisocyanuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2157173A1 true ES2157173A1 (en) | 2001-08-01 |
| ES2157173B1 ES2157173B1 (en) | 2002-03-16 |
Family
ID=20073324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES9902676A Expired - Lifetime ES2157173B1 (en) | 1998-12-08 | 1999-12-03 | METHOD OF TREATMENT OF WASTEWATER OBTAINED FROM THE TRICLOROISOCIANURIC ACID PROCESS |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2157173B1 (en) |
| PL (1) | PL330159A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846424A (en) * | 1973-05-22 | 1974-11-05 | Olin Corp | Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof |
| GB1487707A (en) * | 1974-02-15 | 1977-10-05 | Fmc Corp | Process for recovery of cyanuric acid from treated chlorinated mother liquor |
-
1998
- 1998-12-08 PL PL33015998A patent/PL330159A1/en unknown
-
1999
- 1999-12-03 ES ES9902676A patent/ES2157173B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846424A (en) * | 1973-05-22 | 1974-11-05 | Olin Corp | Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof |
| GB1487707A (en) * | 1974-02-15 | 1977-10-05 | Fmc Corp | Process for recovery of cyanuric acid from treated chlorinated mother liquor |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2157173B1 (en) | 2002-03-16 |
| PL330159A1 (en) | 2000-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EC2A | Search report published |
Date of ref document: 20010801 Kind code of ref document: A1 Effective date: 20010801 |
|
| FA2A | Application withdrawn |
Effective date: 20031120 |