CN110467210A - A method of aluminium polychloride is produced with sodium aluminate solution - Google Patents
A method of aluminium polychloride is produced with sodium aluminate solution Download PDFInfo
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- CN110467210A CN110467210A CN201910850129.4A CN201910850129A CN110467210A CN 110467210 A CN110467210 A CN 110467210A CN 201910850129 A CN201910850129 A CN 201910850129A CN 110467210 A CN110467210 A CN 110467210A
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- sodium aluminate
- aluminate solution
- filter cake
- calcium source
- aluminium polychloride
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- 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
- C01F7/58—Preparation of anhydrous aluminium chloride
- C01F7/60—Preparation of anhydrous aluminium chloride from oxygen-containing aluminium compounds
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of methods with sodium aluminate solution production aluminium polychloride, belong to field of light-weight metal metallurgy, this method comprises: sodium aluminate solution and calcium source slurry are mixed, carry out primary first-order equation, obtain reaction paste, the primary first-order equation temperature is 20-120 DEG C, and the primary first-order equation time is 0.5-4h；The reaction slurry is filtered, filter cake and filtrate are obtained；The filter cake is washed, filter cake after the washing and acid-mixed are closed, carries out secondary response, obtains liquid polymerization aluminium chloride, the secondary response temperature is 50-120 DEG C, and the secondary response time is 0.5-4h.
Description
Technical field
The invention belongs to field of light-weight metal metallurgy, and in particular to a kind of side with sodium aluminate solution production aluminium polychloride
Method.
Background technique
Aluminium polychloride is a kind of water-purifying material, inorganic polymer coagulant, due to hydroxide ion bridging action and
The polymerization of multivalent anions and the molecular weight that produces is larger, the higher inorganic polymer water treatment agent of charge, in form
On be divided into solid-state and two kinds of liquid.Currently, the method for production aluminium polychloride are as follows: using sodium aluminate solution be raw material in high temperature and pressure
Under the conditions of generate aluminium hydroxide, then reacted with aluminium hydroxide with calcium source, hydrochloric acid be added in reaction gains, polyaluminium is made
Aluminium has the following technical problems: (1) generating residue, cause environmental pollution big；(2) aluminium hydroxide is raw under high-temperature and high-pressure conditions
At big energy-consuming, to cause high production cost.
Chinese patent CN001322354, mainly substitutes common aluminium hydroxide using level-one aluminium hydroxide, and high alumina cement replaces
Basicity adjustment is carried out to base fluid for sodium aluminate, is increased in the step of adjusting basicity and polyacrylamide precipitating is added again
Program, last step be three-step precipitation program.Although there is this method low temperature to reduce energy consumption and discharge without residue, not
Residue is not generated, but residue is recycled.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the method with sodium aluminate solution production aluminium polychloride of problem.
The embodiment of the present invention provides a kind of method with sodium aluminate solution production aluminium polychloride, comprising:
Sodium aluminate solution and calcium source slurry are mixed, primary first-order equation is carried out, obtains reaction paste, the primary first-order equation temperature
It is 20-120 DEG C, the primary first-order equation time is 0.5-4h；
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, carries out secondary response, obtains liquid polymerization chlorination
Aluminium, the secondary response temperature are 50-120 DEG C, and the secondary response time is 0.5-4h.
Further, the sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes as follows
It is at least one: crude liquid, sperm, seed precipitation solution, carbon mother liquid, aluminium hydroxide weight solution.
Further, a of the sodium aluminate solutionKFor 1.2-8, preferably 2-4, Al in the sodium aluminate solution2O3Quality
Concentration is 10-200g/L, preferably 50-120g/L.
Further, the calcium source slurry is mixed with beating by calcium source with water obtained, and it is 0- that the calcium source slurry contains L/S admittedly
20, preferably 3-8, the calcium source include following at least one: lime stone, quick lime, calcium hydroxide.
Further, CaO and Al in the sodium aluminate solution in the calcium source slurry2O3Molar ratio GaO/Al2O3For
0.1-3, preferably 0.5-2.
Further, the primary first-order equation temperature is 60-95 DEG C, and the primary first-order equation time is 1-3h.
Further, in the washing filter cake, washing filtrate pH value described in last is tested, the pH value is 7-12,
Preferably 7-10, the temperature of the slurry are 20-100 DEG C, preferably 60-100 DEG C.
Further, the acid is hydrochloric acid, and the hydrochloric acid mass concentration is 10-36%, preferably 20-30%.
Further, the molar ratio Cl/Al of Cl and Al in the filter cake is 0.2-3, preferably 1.2- in the hydrochloric acid
2.5。
Further, the secondary temperature is 60-95 DEG C, and the secondary response time is 1-3h.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
Method provided in an embodiment of the present invention with sodium aluminate solution production aluminium polychloride, comprising: by sodium aluminate solution
It mixes, is reacted with calcium source slurry, obtain reaction paste；The reaction slurry is filtered, filter cake and filtrate are obtained；Described in washing
Filter cake after the washing and acid-mixed are closed, are reacted by filter cake, obtain liquid polymerization aluminium chloride.With this solution, using aluminic acid
Sodium solution is that raw material directly produces aluminium polychloride, avoids the process for generating aluminium hydroxide intermediate raw material, shortens production
Period, and high-temperature heating and elevated pressurization process are avoided, thus reduce production cost, meanwhile, entire generating process is without residual
Slag generates, energy conservation and environmental protection.
Specific embodiment
Below in conjunction with specific embodiment and embodiment, it is specifically described the present invention, advantages of the present invention and various effects
It thus will clearly present.It will be understood by those skilled in the art that these specific embodiments and embodiment are for illustrating
The present invention is not intended to limit the present invention.
Throughout the specification, unless otherwise specified, terms used herein are interpreted as usual in this field
Used meaning.Therefore, unless otherwise defined, all technical and scientific terms used herein has leads with belonging to the present invention
The identical meaning of the general understanding of field technique personnel.Contradiction if it exists, this specification are preferential.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention, can pass through
Market is commercially available or can be prepared by existing method.
It is carried out below in conjunction with method with sodium aluminate solution production aluminium polychloride of the specific embodiment to the application detailed
It describes in detail bright.
Embodiment 1
The application provides a kind of method with sodium aluminate solution production aluminium polychloride, comprising:
Sodium aluminate solution and calcium source slurry are mixed, reacted, reaction paste is obtained；
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, reacted, obtains liquid polymerization aluminium chloride.
The sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes following at least one:
Crude liquid, sperm, seed precipitation solution, carbon mother liquid, aluminium hydroxide weight solution.
The α of the sodium aluminate solutionKIt is 1.2, Al in the sodium aluminate solution2O3Mass concentration is 10g/L.
The calcium source slurry is mixed with beating by calcium source with water obtained, and it is 10 that the calcium source slurry contains L/S admittedly, and the calcium source is
Lime stone.
CaO and Al in the sodium aluminate solution in the calcium source slurry2O3Molar ratio CaO/Al2O3It is 0.1.
Described to mix sodium aluminate solution and calcium source slurry, carrying out reaction includes:
Sodium aluminate solution and calcium source slurry are mixed, reacted, the reaction condition includes: that reaction temperature is 20 DEG C,
Reaction time is 0.5h.
In the washing filter cake, washing filtrate pH value described in last is tested, the pH value is 7, the slurry
Temperature be 20 DEG C.
The acid is hydrochloric acid, and the hydrochloric acid mass concentration is 10%.
The molar ratio Cl/Al of Cl and Al in the filter cake is 0.2 in the hydrochloric acid.
Described to close filter cake after the washing and acid-mixed, carrying out reaction includes:
Filter cake after the washing and acid-mixed are closed, reacted, the reaction condition includes: that temperature is 50 DEG C, and the time is
0.5h。
Embodiment 2
The application provides a kind of method with sodium aluminate solution production aluminium polychloride, comprising:
Sodium aluminate solution and calcium source slurry are mixed, reacted, reaction paste is obtained；
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, reacted, obtains liquid polymerization aluminium chloride.
The sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes following at least one:
Crude liquid, sperm, seed precipitation solution, carbon mother liquid, aluminium hydroxide weight solution.
The α of the sodium aluminate solutionKIt is 8, Al in the sodium aluminate solution2O3Mass concentration is 200g/L.
The calcium source slurry is mixed with beating by calcium source with water obtained, and it is 0 that the calcium source slurry contains L/S admittedly, and the calcium source is
Quick lime.
CaO and Al in the sodium aluminate solution in the calcium source slurry2O3Molar ratio CaO/Al2O3It is 3.
Described to mix sodium aluminate solution and calcium source slurry, carrying out reaction includes:
Sodium aluminate solution and calcium source slurry are mixed, reacted, the reaction condition includes: that reaction temperature is 120 DEG C,
Reaction time is 4h.
In the washing filter cake, washing filtrate pH value described in last is tested, the pH value is 12, the slurry
Temperature be 100 DEG C.
The acid is hydrochloric acid, and the hydrochloric acid mass concentration is 36%.
The molar ratio Cl/Al of Cl and Al in the filter cake is 3 in the hydrochloric acid.
Described to close filter cake after the washing and acid-mixed, carrying out reaction includes:
Filter cake after the washing and acid-mixed are closed, reacted, the reaction condition includes: that temperature is 120 DEG C, and the time is
4h。
Embodiment 3
The application provides a kind of method with sodium aluminate solution production aluminium polychloride, comprising:
Sodium aluminate solution and calcium source slurry are mixed, reacted, reaction paste is obtained:
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, reacted, obtains liquid polymerization aluminium chloride.
The sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes following at least one:
Crude liquid, sperm, seed precipitation solution, carbon mother liquid, aluminium hydroxide weight solution.
The α of the sodium aluminate solutionKIt is 2, Al in the sodium aluminate solution2O3Mass concentration is 50g/L.
The calcium source slurry is mixed with beating by calcium source with water obtained, and it is 20 that the calcium source slurry contains L/S admittedly, and the calcium source is
Calcium hydroxide.
CaO and Al in the sodium aluminate solution in the calcium source slurry2O3Molar ratio CaO/Al2O3It is 0.5.
Described to mix sodium aluminate solution and calcium source slurry, carrying out reaction includes:
Sodium aluminate solution and calcium source slurry are mixed, reacted, the reaction condition includes: that reaction temperature is 60 DEG C,
Reaction time is 1h.
In the washing filter cake, washing filtrate pH value described in last is tested, the pH value is 7, the slurry
Temperature be 60 DEG C.
The acid is hydrochloric acid, and the hydrochloric acid mass concentration is 20%.
The molar ratio Cl/Al of Cl and Al in the filter cake is 1.2 in the hydrochloric acid.
Described to close filter cake after the washing and acid-mixed, carrying out reaction includes:
Filter cake after the washing and acid-mixed are closed, reacted, the reaction condition includes: that temperature is 60 DEG C, and the time is
1h。
Embodiment 4
The application provides a kind of method with sodium aluminate solution production aluminium polychloride, comprising:
Sodium aluminate solution and calcium source slurry are mixed, reacted, reaction paste is obtained；
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, reacted, obtains liquid polymerization aluminium chloride.
The sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes following at least one:
Crude liquid, sperm, seed precipitation solution, carbon mother liquid, aluminium hydroxide weight solution.
The α of the sodium aluminate solutionKIt is 4, Al in the sodium aluminate solution2O3Mass concentration is 120g/L.
The calcium source slurry is mixed with beating by calcium source with water obtained, and it is 8 that the calcium source slurry contains L/S admittedly, and the calcium source is
Calcium hydroxide.
CaO and Al in the sodium aluminate solution in the calcium source slurry2O3Molar ratio CaO/Al2O3It is 2.
Described to mix sodium aluminate solution and calcium source slurry, carrying out reaction includes:
Sodium aluminate solution and calcium source slurry are mixed, reacted, the reaction condition includes: that reaction temperature is 95 DEG C,
Reaction time is 3h.
In the washing filter cake, washing filtrate pH value described in last is tested, the pH value is 10, the slurry
Temperature be 100 DEG C.
The acid is hydrochloric acid, and the hydrochloric acid mass concentration is 30%.
The molar ratio Cl/Al of Cl and Al in the filter cake is 2.5 in the hydrochloric acid.
Described to close filter cake after the washing and acid-mixed, carrying out reaction includes:
Filter cake after the washing and acid-mixed are closed, reacted, the reaction condition includes: that temperature is 95 DEG C, and the time is
3h。
In the method for existing production aluminium polychloride as comparative example, specifically: it using sodium aluminate solution is raw material in high temperature height
Aluminium hydroxide is generated under the conditions of pressure, then is reacted with aluminium hydroxide with calcium source, hydrochloric acid is added in reaction gains, and polymerization chlorine is made
Change aluminium；Test be respectively adopted embodiment 1-4 method and the comparative example method production residue weight of aluminium polychloride, the production cycle and
Production cost, test result are as shown in table 1.
Table 1
| Residue weight g/kg final mean annual increment solution | Production cycle | Production cost (yuan/ton) | |
| Embodiment 1 | 0.5 | 4 hours | 482 |
| Embodiment 2 | 0.5 | 4 hours | 485 |
| Embodiment 3 | 0.5 | 4 hours | 480 |
| Embodiment 4 | 0.5 | 4 hours | 483 |
| Comparative example | 15 | 10 hours | 560 |
Contrast table reduces 6 hours it can be seen that residue weight reduces by 96.6%, production cycle, and production cost reduces
13.93% or so.
Finally, it is to be noted that, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of method with sodium aluminate solution production aluminium polychloride characterized by comprising
Sodium aluminate solution and calcium source slurry are mixed, primary first-order equation is carried out, obtains reaction paste, the primary first-order equation temperature is
20-120 DEG C, the primary first-order equation time is 0.5-4h；
The reaction slurry is filtered, filter cake and filtrate are obtained；
The filter cake is washed, filter cake after the washing and acid-mixed are closed, carries out secondary response, obtains liquid polymerization aluminium chloride, institute
Stating secondary response temperature is 50-120 DEG C, and the secondary response time is 0.5-4h.
2. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
Sodium aluminate solution is the dissolution solution in aluminium oxide process, and the dissolution solution includes following at least one: crude liquid, sperm, kind
Decomposition mother solution, carbon mother liquid, aluminium hydroxide weight solution.
3. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
The a of sodium aluminate solutionKFor 1.2-8, Al in the sodium aluminate solution2O3Mass concentration is 10-200g/L.
4. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
Calcium source slurry is mixed with beating by calcium source with water obtained, and it is 0-20 that the calcium source slurry contains L/S admittedly, the calcium source include it is following at least
It is a kind of: lime stone, quick lime, calcium hydroxide.
5. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
CaO and Al in the sodium aluminate solution in calcium source slurry2O3Molar ratio GaO/Al2O3For 0.1-3.
6. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
Primary first-order equation temperature is 60-95 DEG C, and the primary first-order equation time is 1-3h.
7. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
It washs in the filter cake, tests washing filtrate pH value described in last, the pH value is 7-12, and the temperature of the slurry is
20-100℃。
8. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
Acid is hydrochloric acid, and the hydrochloric acid mass concentration is 10-36%.
9. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that described
The molar ratio Cl/Al of Cl and Al in the filter cake is 0.2-3 in hydrochloric acid.
10. a kind of method with sodium aluminate solution production aluminium polychloride according to claim 1, which is characterized in that institute
Stating secondary temperature is 60-95 DEG C, and the secondary response time is 1-3h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562753A (en) * | 2021-05-12 | 2021-10-29 | 中铝山东新材料有限公司 | Macroporous pseudo-boehmite and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231822B1 (en) * | 1995-12-08 | 2001-05-15 | Goldendale Aluminum Company | Recovering chloride and sulfate compounds from spent potliner |
| WO2008149114A1 (en) * | 2007-06-08 | 2008-12-11 | Integrated Effluent Solutions Limited | Effluent treatment process |
| CN104709990A (en) * | 2015-03-20 | 2015-06-17 | 杭州萧山三江净水剂有限公司 | Special poly aluminum chloride for municipal water supply and preparation method of poly aluminum chloride |
| CN107381610A (en) * | 2017-08-08 | 2017-11-24 | 中国铝业股份有限公司 | A kind of method that aluminium polychloride is prepared using red mud |
| CN109179607A (en) * | 2018-10-10 | 2019-01-11 | 湖南凯涛环保科技有限公司 | A kind of preparation method of efficient dephosphorization aluminium polychloride |
| CN110182836A (en) * | 2019-05-28 | 2019-08-30 | 中国铝业股份有限公司 | A kind of method that bauxite prepares PAC calcium aluminate powder |
-
2019
- 2019-09-09 CN CN201910850129.4A patent/CN110467210A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231822B1 (en) * | 1995-12-08 | 2001-05-15 | Goldendale Aluminum Company | Recovering chloride and sulfate compounds from spent potliner |
| WO2008149114A1 (en) * | 2007-06-08 | 2008-12-11 | Integrated Effluent Solutions Limited | Effluent treatment process |
| CN104709990A (en) * | 2015-03-20 | 2015-06-17 | 杭州萧山三江净水剂有限公司 | Special poly aluminum chloride for municipal water supply and preparation method of poly aluminum chloride |
| CN107381610A (en) * | 2017-08-08 | 2017-11-24 | 中国铝业股份有限公司 | A kind of method that aluminium polychloride is prepared using red mud |
| CN109179607A (en) * | 2018-10-10 | 2019-01-11 | 湖南凯涛环保科技有限公司 | A kind of preparation method of efficient dephosphorization aluminium polychloride |
| CN110182836A (en) * | 2019-05-28 | 2019-08-30 | 中国铝业股份有限公司 | A kind of method that bauxite prepares PAC calcium aluminate powder |
Non-Patent Citations (1)
| Title |
|---|
| 汪多仁: "《绿色净水处理剂》", 30 November 2006 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562753A (en) * | 2021-05-12 | 2021-10-29 | 中铝山东新材料有限公司 | Macroporous pseudo-boehmite and preparation method thereof |
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Application publication date: 20191119 |