IT1272297B - "PROCESS AND PLANT FOR THE PURIFICATION AND RECOVERY OF AMMONIA FROM CONTAMINATED WASTE, EVEN IN THE PRESENCE OF STRONG ANIONS". - Google Patents
"PROCESS AND PLANT FOR THE PURIFICATION AND RECOVERY OF AMMONIA FROM CONTAMINATED WASTE, EVEN IN THE PRESENCE OF STRONG ANIONS".Info
- Publication number
- IT1272297B IT1272297B ITRM940408A ITRM940408A IT1272297B IT 1272297 B IT1272297 B IT 1272297B IT RM940408 A ITRM940408 A IT RM940408A IT RM940408 A ITRM940408 A IT RM940408A IT 1272297 B IT1272297 B IT 1272297B
- Authority
- IT
- Italy
- Prior art keywords
- ammonia
- contaminated
- carbonate
- strong anions
- purification
- Prior art date
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title abstract 5
- 150000001450 anions Chemical class 0.000 title abstract 3
- 229910021529 ammonia Inorganic materials 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000002699 waste material Substances 0.000 title abstract 2
- 238000000746 purification Methods 0.000 title 1
- 238000011084 recovery Methods 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract 2
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 150000003863 ammonium salts Chemical class 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 150000005323 carbonate salts Chemical class 0.000 abstract 1
- 150000003841 chloride salts Chemical class 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- 229910000027 potassium carbonate Inorganic materials 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract 1
Landscapes
- Removal Of Specific Substances (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Procedimento per la purificazione ed il recupero di ammoniaca da reflui contaminati, anche in presenza di anioni forti, quali cloruri, fosfati, solfati e simili, consistente nel mescolare la soluzione contaminata con sale carbonato, quali carbonato di sodio, carbonato di potassio, carbonato di calcio, etc., eventualmente previo trattamento preliminare con idrossido di sodio (soda caustica) per il fissaggio di detti anioni forti; nel riscaldare la soluzione contaminata ad una temperatura compresa tra 35 e 48°C, con pH compreso tra 8 e 10, preferibilmente 9,5, in modo da ottenere sali ammonici altamente volatili; e nel separare tali sali ammoniacali mediante una prima condensazione ed un loro adsorbimento in una soluzione acquosa mantenuta in ricircolo continuo e che via via si arricchisce di tali composti.Method for purifying and recovering ammonia from contaminated waste, even in the presence of strong anions, such as chlorides, phosphates, sulphates and the like, consisting of mixing the solution contaminated with carbonate salt, such as sodium carbonate, potassium carbonate, carbonate of calcium, etc., possibly after preliminary treatment with sodium hydroxide (caustic soda) for the fixing of said strong anions; heating the contaminated solution to a temperature between 35 and 48 ° C, with a pH between 8 and 10, preferably 9.5, so as to obtain highly volatile ammonium salts; and in separating these ammonia salts by means of a first condensation and their adsorption in an aqueous solution maintained in continuous recirculation and which is gradually enriched with such compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM940408A IT1272297B (en) | 1994-06-22 | 1994-06-22 | "PROCESS AND PLANT FOR THE PURIFICATION AND RECOVERY OF AMMONIA FROM CONTAMINATED WASTE, EVEN IN THE PRESENCE OF STRONG ANIONS". |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM940408A IT1272297B (en) | 1994-06-22 | 1994-06-22 | "PROCESS AND PLANT FOR THE PURIFICATION AND RECOVERY OF AMMONIA FROM CONTAMINATED WASTE, EVEN IN THE PRESENCE OF STRONG ANIONS". |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITRM940408A0 ITRM940408A0 (en) | 1994-06-22 |
| ITRM940408A1 ITRM940408A1 (en) | 1995-12-22 |
| IT1272297B true IT1272297B (en) | 1997-06-16 |
Family
ID=11402610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITRM940408A IT1272297B (en) | 1994-06-22 | 1994-06-22 | "PROCESS AND PLANT FOR THE PURIFICATION AND RECOVERY OF AMMONIA FROM CONTAMINATED WASTE, EVEN IN THE PRESENCE OF STRONG ANIONS". |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1272297B (en) |
-
1994
- 1994-06-22 IT ITRM940408A patent/IT1272297B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM940408A0 (en) | 1994-06-22 |
| ITRM940408A1 (en) | 1995-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |