CN102070170B - Method for producing polyaluminium chloride - Google Patents
Method for producing polyaluminium chloride Download PDFInfo
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- CN102070170B CN102070170B CN 200910112801 CN200910112801A CN102070170B CN 102070170 B CN102070170 B CN 102070170B CN 200910112801 CN200910112801 CN 200910112801 CN 200910112801 A CN200910112801 A CN 200910112801A CN 102070170 B CN102070170 B CN 102070170B
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Abstract
The invention relates to a method for producing polyaluminium chloride, which comprises the following steps: adding aluminum-containing waste residue into solution of hydrochloric acid and reacting at 90 to 120 DEG C and under a normal pressure for 3 to 5 hours; filtering, collecting mother solution, filling the mother solution into an acid-resistance and vapor-heated reactor with a stirring device, starting stirring, supplying a proper amount of water, starting to add calcium aluminate powder, and after the addition is finished, regulating the density of feed liquid to more than or equal to 1.20g/ml with water; and adding a synergist, heating and keeping the temperature between 90 and 120 DEG C, reacting at normal temperature for 3 to 5 hours, and obtaining finished liquid polyaluminium chloride. Compared with the prior art, the method, which uses aluminum-containing waste residue obtained after the neutralization of waste liquid from surface pickling of aluminum ingots and bands as raw material, reduces the manufacturing cost of polyaluminium chloride, recycles aluminum-containing waste residue and is in accordance with the environmental-protection concept of energy conservation and emission reduction.
Description
Technical field
The present invention relates to a kind of production method of poly aluminium chloride.
Background technology
Along with industrial fast development, the pollution of water resources constantly aggravates, the growing tension that causes people's tap water resource, the kind of pollutant in water is a lot, and contain a large amount of hazardous and noxious substances in the water, they are absorbed, or directly enter human body by tap water by soil, animals and plants, the mankind are caused long-term injury, and the resource of therefore how purifying waste water becomes very urgent problems.
Poly aluminium chloride is a kind of efficient inorganic high-molecular coagulant adopting, has efficient, low consumption, the advantage such as inexpensive, convenient, and its purifying water effect is considerably beyond other water purification agents such as iron trichloride, Tai-Ace S 150.In the prior art, the manufacturing of poly aluminium chloride generally includes following method: the direct dissolution method of metallic aluminium; Manufacture method take crystalline aluminium hydroxide as raw material; Manufacture method take Tai-Ace S 150 as raw material; Manufacture method take aluminum oxide as raw material; Manufacture method take clay pit, bauxite as raw material.These manufacture method generally have following three shortcomings: the one, and raw materials used is conventional industrial chemicals, causes its manufacturing cost relatively high; The 2nd, its basicity is relatively low, has directly caused the product quality indicators such as the polymerization degree, the molecule quantity of electric charge, coagulability, package stability, pH value and alumina content of product relatively poor; The 3rd, water insoluble matter content is relatively high, causes its application to be very restricted.
Summary of the invention
Main purpose of the present invention is to overcome higher, the low higher shortcoming of water insoluble matter content that reaches of basicity of raw materials cost when poly aluminium chloride is produced in the prior art, a kind of production method of poly aluminium chloride is provided, can greatly reduce the raw materials cost of its production, improve the basicity of product and reduce water insoluble matter content.
The present invention adopts following technical scheme:
A kind of production method of poly aluminium chloride comprises the steps:
Step 1, in acidproof, the steam heating reaction vessel with whipping appts, start stirring, add entry and hydrochloric acid, dose volume concentration is the hydrochloric acid soln of 20-25%, under condition of normal pressure, be warming up to 60-80 ℃, begin to add Aluminiferous waste slag, persistently overheating, Aluminiferous waste slag add complete after, the feed liquid system temperature is controlled at 90-120 ℃, reacts 3-5h under normal pressure;
Step 2, feed liquid after reaction finished is filtered, and removes waste residue impurity, gets mother liquor and enters in acidproof, the steam heating reaction vessel with whipping appts, start stirring, replenish suitable quantity of water, begin to add calcium aluminate powder, the complete rear water that feeds intake is regulated feed liquid density 〉=1.20g/ml, then add synergistic agent, add the thermal control temperature at 90-120 ℃, under normal pressure, react 3-5h, get finished product liquid poly aluminium chloride.
The liquid poly aluminium chloride that obtains in the described step 2 obtains the solid poly aluminium chloride by cylinder or drying process with atomizing.
The weight proportion of described hydrochloric acid, Aluminiferous waste slag, calcium aluminate powder and synergistic agent is as follows: hydrochloric acid 150-200 part, Aluminiferous waste slag 100-150 part, calcium aluminate powder 20-50 part, synergistic agent 3-5 part.
Described Aluminiferous waste slag is the Aluminiferous waste slag after aluminium ingot, the aluminium strip surface acid-washing waste liquid neutralizing treatment.
Described hydrochloric acid is technical hydrochloric acid; Described synergistic agent is calcium oxide or calcium hydroxide, is mixed with the emulsion that mass concentration is 20-40% when feeding intake.
By the above-mentioned description of this invention as can be known, be compared with existing technology, the present invention has following beneficial effect:
One, the present invention adopts Aluminiferous waste slag after aluminium ingot, the aluminium strip surface acid-washing waste liquid neutralizing treatment as raw material, not only so that the manufacturing cost of poly aluminium chloride reduces, also Aluminiferous waste slag can be recycled, and meets the environmental protection concept of energy-saving and emission-reduction;
Two, in step 2, add synergistic agent and can make the acid reduction of feed liquid, add hydroxyl overseas Chinese federation and improve the product basicity, thereby make the product quality indicators such as the polymerization degree relevant with the product basicity, the molecule quantity of electric charge, coagulability, package stability, pH value and alumina content improve level;
Three, the product water insolubles content that the present invention makes is lower, so that the range of application of product is more wide.
Embodiment
The production method of a kind of poly aluminium chloride of the present invention comprises the steps:
In acidproof, the steam heating reaction vessel with whipping appts, start stirring, add entry and hydrochloric acid, dose volume concentration is 22% hydrochloric acid soln, is warming up to 65 ℃ under condition of normal pressure, begins to add Aluminiferous waste slag, persistently overheating, Aluminiferous waste slag add complete after, the feed liquid system temperature is controlled at 95 ℃, reacts 4h under normal pressure; Feed liquid after reaction finished is filtered, remove waste residue impurity, get mother liquor and enter in acidproof, the steam heating reaction vessel with whipping appts, start stirring, replenish suitable quantity of water, begin to add calcium aluminate powder, the complete rear water that feeds intake is regulated feed liquid density 〉=1.20g/ml, then adds synergistic agent, adds the thermal control temperature at 95 ℃, under normal pressure, react 4h, get finished product liquid poly aluminium chloride; The liquid poly aluminium chloride that obtains is entered the liquid material header tank by pump, and the header tank liquid product slowly enters the roller drying hopper, produces solid poly aluminium chloride product by rotating drum dryer.
Wherein, can to adopt total acidity be 31% technical hydrochloric acid to hydrochloric acid; Alumina content is 15-20% in the Aluminiferous waste slag, water content about 80%, impurity＜5%; Aluminium content 50%, calcium oxide content 28-31% are held in acid in the calcium aluminate powder.
The quality index contrast that the poly aluminium chloride product that the present invention is made and certain adopt product that conventional material produces and GB15892-2003 is such as following table:
As can be seen from the above table, its alumina content of the poly aluminium chloride that the present invention makes, basicity, water insoluble matter content all are better than the product that conventional raw materials is produced, and manufacturing cost of the present invention reduces, and also Aluminiferous waste slag can be recycled, and meets the environmental protection concept of energy-saving and emission-reduction.
Above-mentioned only is a specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (3)
1. the production method of a poly aluminium chloride is characterized in that comprising the steps:
Step 1, in acidproof, the steam heating reaction vessel with whipping appts, start stirring, add entry and hydrochloric acid, dose volume concentration is the hydrochloric acid soln of 20-25%, under condition of normal pressure, be warming up to 60-80 ℃, begin to add Aluminiferous waste slag, persistently overheating, Aluminiferous waste slag add complete after, the feed liquid system temperature is controlled at 90-120 ℃, reacts 3-5h under normal pressure;
Step 2, feed liquid after reaction finished is filtered, and removes waste residue impurity, gets mother liquor and enters in acidproof, the steam heating reaction vessel with whipping appts, start stirring, replenish suitable quantity of water, begin to add calcium aluminate powder, the complete rear water that feeds intake is regulated feed liquid density 〉=1.20g/mL, then add synergistic agent calcium oxide or calcium hydroxide, add the thermal control temperature at 90-120 ℃, under normal pressure, react 3-5h, obtain finished product liquid poly aluminium chloride;
The weight proportion of described hydrochloric acid, Aluminiferous waste slag, calcium aluminate powder and synergistic agent is as follows: hydrochloric acid 150-200 part, Aluminiferous waste slag 100-150 part, calcium aluminate powder 20-50 part, synergistic agent 3-5 part;
Described synergistic agent is mixed with the emulsion that mass concentration is 20-40% when feeding intake.
2. the production method of a kind of poly aluminium chloride as claimed in claim 1 is characterized in that the liquid poly aluminium chloride that described step 2 obtains obtains the solid poly aluminium chloride by cylinder or drying process with atomizing.
3. the production method of a kind of poly aluminium chloride as claimed in claim 1 or 2 is characterized in that described Aluminiferous waste slag is the Aluminiferous waste slag after aluminium ingot, the aluminium strip surface acid-washing waste liquid neutralizing treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910112801 CN102070170B (en) | 2009-11-19 | 2009-11-19 | Method for producing polyaluminium chloride |
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| CN 200910112801 CN102070170B (en) | 2009-11-19 | 2009-11-19 | Method for producing polyaluminium chloride |
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| CN102070170A CN102070170A (en) | 2011-05-25 |
| CN102070170B true CN102070170B (en) | 2013-05-29 |
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| CN 200910112801 Active CN102070170B (en) | 2009-11-19 | 2009-11-19 | Method for producing polyaluminium chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591249A (en) * | 2015-01-27 | 2015-05-06 | 长沙永创环保科技有限公司 | Preparation method for polyaluminum chloride |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976524A (en) * | 2012-11-27 | 2013-03-20 | 常州大学 | Method for treating acidic aluminiferous industrial wastewater |
| CN103738992A (en) * | 2014-01-23 | 2014-04-23 | 天津市水洁净水材料有限公司 | Preparation technology of efficient polymeric aluminum chloride for wastewater treatment |
| CN104402031B (en) * | 2014-10-23 | 2016-08-24 | 蓝保(厦门)水处理科技有限公司 | A kind of polyaluminium chloride filter residue recycling technique |
| CN105668601B (en) * | 2016-01-07 | 2018-06-12 | 宁波顺帆净水剂有限公司 | A kind of method that polyaluminium chloride is prepared using Aluminiferous waste slag |
| CN105692669A (en) * | 2016-02-17 | 2016-06-22 | 嘉善海峡净水灵化工有限公司 | Preparation method of colorless transparent polyaluminum chloride |
| CN106044819B (en) * | 2016-06-07 | 2018-02-27 | 临沂长荣环保科技有限公司 | A kind of environmentally friendly aluminium polychloride sodium metasilicate Joint Production method |
| CN106186232A (en) * | 2016-08-17 | 2016-12-07 | 聂麒曌 | A kind of flocculant and preparation method thereof |
| CN106673041B (en) * | 2016-12-27 | 2018-03-27 | 蓝保(厦门)水处理科技有限公司 | A kind of production technology of efficiently highly concentrated polyaluminium chloride |
| CN108545765A (en) * | 2018-05-17 | 2018-09-18 | 深圳市长隆科技有限公司 | A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate |
| CN112194188A (en) * | 2020-09-25 | 2021-01-08 | 宁夏水投清水源水处理科技有限公司 | Preparation process of high-purity polyaluminum ferric chloride for water purification treatment |
| CN112194161A (en) * | 2020-10-13 | 2021-01-08 | 马鞍山健鼎化工有限公司 | Preparation process of high-basicity polyaluminium chloride |
| CN115108572A (en) * | 2022-04-18 | 2022-09-27 | 重庆市宇洁化工有限公司 | Polyaluminium chloride production method suitable for purifying various water qualities |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904856A (en) * | 1995-01-24 | 1999-05-18 | Kemira Kemi Aktiebolag | Process for the preparation of aluminum salt solutions |
| CN101531389A (en) * | 2009-03-26 | 2009-09-16 | 嘉善海峡净水灵化工有限公司 | Method for producing polyaluminium chloride |
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- 2009-11-19 CN CN 200910112801 patent/CN102070170B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904856A (en) * | 1995-01-24 | 1999-05-18 | Kemira Kemi Aktiebolag | Process for the preparation of aluminum salt solutions |
| CN101531389A (en) * | 2009-03-26 | 2009-09-16 | 嘉善海峡净水灵化工有限公司 | Method for producing polyaluminium chloride |
Non-Patent Citations (1)
| Title |
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| 黄冬根.优级聚合氯化铝净水剂的生产.《净水技术》.1999,第67卷(第1期),25-27. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591249A (en) * | 2015-01-27 | 2015-05-06 | 长沙永创环保科技有限公司 | Preparation method for polyaluminum chloride |
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| CN102070170A (en) | 2011-05-25 |
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