WO2001044110B1 - Flocculants - Google Patents
FlocculantsInfo
- Publication number
- WO2001044110B1 WO2001044110B1 PCT/EP2000/012870 EP0012870W WO0144110B1 WO 2001044110 B1 WO2001044110 B1 WO 2001044110B1 EP 0012870 W EP0012870 W EP 0012870W WO 0144110 B1 WO0144110 B1 WO 0144110B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- charge
- augmented
- stabilized
- flocculant
- flocculant solution
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
- C01F7/57—Basic aluminium chlorides, e.g. polyaluminium chlorides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Abstract
Polyaluminium chloride solutions may tend to be unstable in storage particularly those having a high basicity or charge density. This may markedly reduce the efficiency of the flocculant. The invention provides an aqueous polyaluminium chloride flocculant solution containing a stabilising quantity of a dissolved boron compound or compounds such as, for example, the boric acids or salts. The stabiliser may be included during the production of the focculant or to an existing flocculant.
Claims
1. A charge-augmented stabilized flocculant solution comprising an aqueous polyaluminium chloride flocculant solution having dissolved therein a stabilizing quantity of a boron compound or compounds and one or more magnesium and/or calcium carbonate materials.
2. A charge-augmented stabilized flocculant solution as claimed in claim 1 wherein the boron compound or compounds are selected from oxy-acids of boron, and their soluble salts.
3. A charge-augmented stabilized flocculant solution as claimed in claim 1 or claim 2 wherein the boron compound or compounds are selected from boric acid, salts of boric acid, metaborates, tetraborates and pyroborates.
4. A charge-augmented stabilized flocculant solution as claimed in any preceding claim wherein the boron compound or compounds are present in from 0.05% to 10 A charge- augmented stabilized flocculant solution as claimed in claim% by weight of the polyaluminium chloride flocculant solution calculated as boric acid.
5. A charge-augmented stabilized flocculant solution as claimed in any preceding claim having a cationic charge density of at least 750 m eq./Kg.
6. A process for the production of a charge- augmented stabilized flocculant solution comprising dissolving in a polyaluminium chloride solution, or ina basified aluminium chloride solution, or in an acidic aluminium chloride solution containing free HC1, a stabilizing quantity of a boron compound or compounds and one or more magnesium and/or calcium carbonate materials.
7. A process as claimed in claim 6 wherein the amount of dissolved magnesium carbonate and/or calcium carbonate is sufficient to augment the cationic charge density of the flocculant to at least 750 m.eq./Kg.
17
8. A process as claimed in claim 7 wherein the polyaluminium chloride or aluminium chloride solution has a total organic carbon content of over 100 micrograms/litre.
9. A process for the treatment of water or an aqueous effluent by mixing with the water or effluent a composition as claimed in any one of claims 1 to 5, allowing flocculation to occur and separating the supernatant liquid.
10. A process as claimed in claim 9 wherein the water or effluent has a pH of below 7.
11. A composition as claimed in any one of claims 1 to 5, or a process as claimed in any one of claims 6 to 10, and substantially as described herein.
12. A composition or process as claimed in claim 11 and substantially as described in any one of Examples 2 to 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9929637.8 | 1999-12-16 | ||
| GBGB9929637.8A GB9929637D0 (en) | 1999-12-16 | 1999-12-16 | Flocculants |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2001044110A1 WO2001044110A1 (en) | 2001-06-21 |
| WO2001044110B1 true WO2001044110B1 (en) | 2001-10-25 |
Family
ID=10866368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/012870 WO2001044110A1 (en) | 1999-12-16 | 2000-12-07 | Flocculants |
Country Status (2)
| Country | Link |
|---|---|
| GB (3) | GB9929637D0 (en) |
| WO (1) | WO2001044110A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE526891C2 (en) * | 2002-07-09 | 2005-11-15 | Feralco Ab | Aluminum sulfate compositions containing polynuclear complexes and process for their preparation and use thereof |
| FR2864064B1 (en) * | 2003-12-22 | 2006-03-03 | Arkema | PROCESS FOR THE PRODUCTION OF SOLID ALUMINUM ALUMINUM POLYCHLORIDE AND POLYCHLOROSULFATE SOLUTIONS WITH HIGH ALUMINUM AND STABLE CONCENTRATION AND SOLUTIONS OBTAINED |
| EP1690834A3 (en) | 2005-02-14 | 2015-05-13 | Sachtleben Chemie GmbH | Polyaluminum chloride solution |
| WO2008101276A1 (en) * | 2007-02-20 | 2008-08-28 | Perpetual Water Pty Ltd | Apparatus and method for removing contaminants from water |
| SE531166C2 (en) * | 2007-06-08 | 2009-01-07 | Kemira Kemi Ab | Process for the preparation of polyaluminum salts |
| EP2905264A1 (en) * | 2014-02-10 | 2015-08-12 | ABB France | Method of treatment of the effluents of coating |
| CN105600893A (en) * | 2015-11-18 | 2016-05-25 | 常州市清流水处理剂有限公司 | Polyferric chloride production method and device |
| CN115353185B (en) * | 2022-09-21 | 2023-04-07 | 广东天赐水处理科技有限公司 | Composite polyacrylamide flocculant and application thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930940B1 (en) * | 1970-08-12 | 1974-08-17 | ||
| JPS52109492A (en) * | 1976-03-11 | 1977-09-13 | Toyo Soda Mfg Co Ltd | Stabilizing method for basic aluminium chloride solution |
| US4566986A (en) * | 1984-08-31 | 1986-01-28 | Waldmann John J | Flocculating agents and processes for making them |
| JPS6369600A (en) * | 1986-09-10 | 1988-03-29 | Sekisui Enbairomento Kk | Dehydrating method for sludge |
| JPH01137975A (en) * | 1987-11-25 | 1989-05-30 | Susumu Hashimoto | Immobilization of microorganism, enzyme and chemical substance |
| US5938970A (en) * | 1997-06-11 | 1999-08-17 | General Chemical Corporation | Polynucleate metal hydroxide compounds and method for their preparation |
| DE19819281C2 (en) * | 1998-04-30 | 2001-04-26 | Axiva Gmbh | Process for the purification of waste water from agar-agar production |
-
1999
- 1999-12-16 GB GBGB9929637.8A patent/GB9929637D0/en not_active Ceased
-
2000
- 2000-12-07 WO PCT/EP2000/012870 patent/WO2001044110A1/en active Application Filing
- 2000-12-08 GB GB0030024A patent/GB2358186B/en not_active Expired - Fee Related
- 2000-12-11 GB GBGB0030092.1A patent/GB0030092D0/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB0030092D0 (en) | 2001-01-24 |
| GB0030024D0 (en) | 2001-01-24 |
| GB2358186B (en) | 2002-01-16 |
| GB9929637D0 (en) | 2000-02-09 |
| WO2001044110A1 (en) | 2001-06-21 |
| GB2358186A (en) | 2001-07-18 |
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