CN1184779A - Method for producing water purifying agent using powder AD-5 as raw material - Google Patents
Method for producing water purifying agent using powder AD-5 as raw material Download PDFInfo
- Publication number
- CN1184779A CN1184779A CN97120346A CN97120346A CN1184779A CN 1184779 A CN1184779 A CN 1184779A CN 97120346 A CN97120346 A CN 97120346A CN 97120346 A CN97120346 A CN 97120346A CN 1184779 A CN1184779 A CN 1184779A
- Authority
- CN
- China
- Prior art keywords
- powder
- sulfuric acid
- reaction
- water purifying
- water
- 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
Landscapes
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invented water purifier can be used to treat tap water, industrial water and waste water. It is prepared by using powdered AD-15 whose chemical components (wt.%) are: metallic aluminium 10-15%, Al2O3 70-75%, SiO2 2-10%, MgO 2-6%, C less than 2% to react with sulfuric acid or hydrochloric acid to obtain aluminium sulphate or polymerized aluminium chloride which can be used as water purifier. After the reaction of sulfuric acid with powdered AD-15 and before filtration, small amount of watersoluble sulphides may be added, so that heavy metal ions react with sulphides to form insoluble precipitates which can be removed by filtration. This water purifier is good in purifying effect and low in cost.
Description
The invention relates to a production method of a water purifying agent for water treatment. The water purifying agent can be used for treating tap water, industrial water and sewage.
At present, many raw materials are used for producing water purifying agents, as shown in patent documents CN1069008A, CN1072157A, CN1076429A, CN1067031A, CN1072157A, CN10189988B, CN1020710C and CN1009190B, but the raw materials are expensive, so that the manufacturing cost of the water purifying agents is increased.
The invention aims to provide a method for producing a water purifying agent by using powder AD-15, which adopts low-cost AD-15 as a raw material for producing the water purifying agent, thereby reducing the manufacturing cost of the water purifying agent.
The purpose of the invention is realized as follows:
the powder AD-15 comprises the following chemical components in percentage by weight: 10-15% of metallic aluminum and Al2O370～75％，SiO22-10%, MgO 2-6%, C<2%. The powder AD-15 containing the above components is reacted with sulfuric acid or hydrochloric acid to obtain aluminum sulfate or polyaluminum chloride which can be used as a water purifying agent.
In addition, when the powder AD-15 is used as a raw material to prepare the aluminum sulfate water purifying agent, because harmful heavy metals may be doped in the powder AD-15, a proper amount of water-soluble sulfide should be added in the case of containing harmful heavy metals. The heavy metal ions react with the sulfide to form a precipitate, and the heavy metal precipitate is removed by a filtration method, thereby obtaining the aluminum sulfate meeting the requirements of the water purifying agent.
The process of the present invention is described in detail below with reference to examples:
firstly, the chemical components (weight percent) are 10-15 percent of metallic aluminum and Al2O370～75％，SiO22-10% of powder AD-15, 2-6% of MgO and less than 2% of C are put into sulfuric acid with the concentration of 15-30%. Metallic aluminum and Al in powder AD-152O3Reacts with sulfuric acid to produce hydrogen and aluminum sulfate. 1Kg of powder AD-15, 5-7 liters of 15-30% sulfuric acid, and metallic aluminum and Al in the powder AD-152O3Reacting with sulfuric acid, filtering, and drying at a temperature of over 100 ℃ to obtain solid aluminum sulfate.
The chemical reaction formula is as follows:
namely: 54Kg of metallic aluminum is reacted with 294Kg of sulfuric acid to produce 6Kg of hydrogen and 342Kg of aluminum sulfate. The resultant is dissolved in water, filtered and the water is evaporated to obtain solid aluminum sulfate. When in use, the solid aluminum sulfate is dissolved into solution, and the direct use of the liquid is convenient.
Because the reaction of the powder AD-15 and concentrated sulfuric acid is very strong when the powder AD-15 and concentrated sulfuric acid are directly reacted, in order to enable the reaction to be slowly carried out, the reaction is carried out after the powder AD-15 is changed into 15-30% dilute sulfuric acid.
In the preparation process of the powder AD-15, trace heavy metals or compounds may be mixed into the powder AD-15, so that the aluminum sulfate water purifying agent obtained by the above method is mixed with heavy metal substances, and even if the heavy metal substances are contained, the heavy metal substances can be removed by a filtration method as long as the heavy metal substances are not dissolved in water; however, if heavy metals are dissolved in water and exist as heavy metal ions, the quality of the water purifying agent will be affected. These heavy metal impurities can be removed by the following methods:
after the sulfuric acid has reacted with the powdered AD-15, and before filtration, a corresponding amount of a water-soluble sulfide, such as sodium sulfide (Na), is added depending on the amount of heavy metal content measured2S), potassium sulfide (K)2S) and the like, the heavy metal ions react with the sulfide to form insoluble precipitates, and the insoluble precipitates are removed by a filtration method, so that the aluminum sulfate water purifying agent meeting the requirements is obtained.
The chemical reaction formula is as follows:
secondly, the chemical components (weight percent) are 10-15 percent of metallic aluminum and Al2O370～75％，SiO22-10 percent of powder AD-15, 2-6 percent of MgO and less than 2 percent of C are put into hydrochloric acid with the concentration of 20 percent, and 1kg of powder AD-15 and 2-4 liters of 20 percent of hydrochloric acid act. After the powder AD-15 is dissolved in the hydrochloric acid, the solution is continuously stirred, so that the powder AD-15 is prevented from sinking to the bottom and the reaction is ensured to be complete. After reacting for 6-10 hours, adjusting the reaction solution to make the specific gravity of the reaction solution be 1.2-1.3 g/cm3Then, the temperature is maintained, and the reaction and polymerization are carried out naturally. And (3) always maintaining the pH value between 3.5 and 4.5 in the reaction process, and after reacting for 24 hours, filtering the solution and removing the precipitate to obtain the polyaluminum chloride.
Example 1: (1) preparation of aluminium sulphate
According to reaction formula (1), the ratio of metallic aluminum to sulfuric acid is 54: 294, and 342(g) of aluminum sulfate can be obtained after the reaction.
100g of the powderThe chemical components (weight percent) are 15 percent of metallic aluminum and Al2O372％，SiO27%, MgO 4.5%, C1.5% powder AD-15 was reacted with 600ml of 28% sulfuric acid, filtered, and dried at a temperature of 100 ℃ or higher to obtain 130g of aluminum sulfate.
Table 1 shows the theoretical and experimental comparison of the various quantities used in the reaction with pure aluminum metal, the powders AD-15 and sulfuric acid.
TABLE 1
| AD-15 | Metallic aluminium | Sulfuric acid | Aluminium sulphate | |
| Pure metallic aluminum | 0 | 54g | 294g | 342g |
| Theoretical dosage value of AD-15 | 100g | 15g | 82g | 95g |
| Dosage value for AD-15 experiment | 100g | 15g | 120g (Note 1) | 130g |
Note 1: in the experiment, alumina other than metallic aluminum also reacts with sulfuric acid. The actual amount of sulfuric acid used is greater than the theoretical amount.
It is clear from Table 1 that the actual amount of sulfuric acid added to the metallic aluminum in the powdered AD-15 reacted with sulfuric acid increases, which indicates that a portion of the alumina in the powdered AD-15 also reacted with sulfuric acid, the alumina in the powdered AD-15 was not completely stable α type, and unstable alumina was present, and from the X-ray analysis of the powdered AD-15, α type Al2O3Accounting for 50 percent, and simultaneously, the unstable β and gamma types exist, in a large-scale production test, 1300kg of aluminum sulfate can be prepared by using 1000kg of powder AD-15 and 5000-7000 liters of 15-30 percent sulfuric acid.(2) Heavy metal removal
After the sulfuric acid reacts with the powder AD-15 and before filtration, 0.1 g of Na is added to 100g of aluminum sulfate solution2And S. Heavy metal ions are the same as Na2S reacting to form insoluble precipitate, and filtering to remove the insoluble heavy metal precipitate to obtainTo obtain the aluminum sulfate water purifying agent meeting the requirements.
In the course of the trial and error, when the Mn content was found to be about 80ppm, a small amount of Na was added2After the S solution is stirred and filtered, the Mn content in the aluminum sulfate is reduced to below 5 ppm.
TABLE 2 by Na2And S is used as a precipitator to treat the solution, and the analysis result of heavy metals in the prepared aluminum sulfate is obtained.
TABLE 2 heavy metal content of aluminum sulfate
| Item | Analysis results | Analytical method |
| PH(1g/100ml，21℃) | 3.9 | 1g/100ml glass electrode method |
| AS(wt ppm) | ＜5 | DDTC-Ag method |
| Mn(wt ppm) | ＜5 | 1cp luminescence assay |
| Cd(wt ppm) | ＜2 | Atomic absorption method |
| pb(wt ppm) | ＜10 | Atomic absorption method |
| Hg(wt ppm) | ＜0.5 | Reduction oxidation atom absorption method |
| Hexavalent Cr (wt ppm) | ＜10 | Diphenyl caulzid method |
The results in table 2 show that: when the powder AD-15 is used for preparing the aluminum sulfate serving as the water purifying agent, Na is used2After S removes heavy metals, the prepared aluminum sulfate completely meets the standard of Chinese water purifying agents.
Example 2: preparation of polyaluminium chloride
Will 100g chemical composition (weight%) of metal aluminium 15% and Al2O372％，SiO2Adding 300ml of 20% hydrochloric acid into 7%, 4.5% MgO and 1.5% C powder AD-15, and stirring after the powder AD-15 is dissolved in the hydrochloric acid to prevent the powder AD-15 from settling at the bottom and ensure complete reaction; after 8 hours of reaction, the reaction solution was adjusted to a specific gravity of 1.25g/cm3Then preserving the temperature at room temperature to enable the mixture to naturally react and polymerize; and (3) always maintaining the pH value between 3.5 and 4.5 in the reaction process, and after reacting for 24 hours, filtering the solution and removing the precipitate to obtain the polyaluminum chloride.
The water purification test of the raw water of the Laoshan reservoir in Qingdao was carried out using the water purification agent, polyaluminium chloride, obtained by the above method, and the results are shown in Table 3.
From the experimental results, the powder AD-15 is used as a raw material to react with sulfuric acid or hydrochloric acid to prepare the water purifying agent, namely aluminum sulfate or polyaluminum chloride, and the water purifying effect is good. Can safely treat drinking water. But the method of the invention has lower cost than the traditional method. From the view point of recycling chemistry, the water purifying agent prepared by the powder AD-15 has higher practical value for water treatment.
TABLE 3 analysis and comparison table for water purification effect
| Item | Unit of | Laoshan mountain water Reservoir raw water | Purifying and precipitating After-precipitation water | National drinking water sanitation Standard GB5749 |
| Turbidity of water | Degree of rotation | 55 | 3 | ≤3 |
| Color intensity | Degree of rotation | 36 | ＜5 | ≤15 |
| Good smell and taste | Stage | 2 | 1 | No foreign odor or peculiar smell |
| Visible to the naked eye | Is provided with | Is free of | Must not contain | |
| PH | 6.75 | 6.75 | 6.5～8.5 | |
| Ammonia nitrogen | mg/l | 0.156 | 0.212 | |
| Cl- | mg/l | 12.8 | 16.5 | ≤250 |
| SO4 -2 | mg/l | 26 | 30 | ≤250 |
| Fe | mg/l | 0.08 | 0.06 | ≤0.1 |
| Mn | mg/l | 0.08 | 0.06 | ≤0.1 |
| Cu | mg/l | ＜0.05 | ＜0.05 | ≤0.1 |
| Zn | mg/l | 0.16 | 0.01 | ≤0.1 |
| As | mg/l | ＜0.01 | ＜0.01 | ≤0.05 |
| Cd | mg/l | ＜0.01 | ＜0.01 | ≤0.01 |
| Pb | mg/l | ＜0.05 | ＜0.05 | ≤0.05 |
| Cyanide compounds | mg/l | ＜0.002 | 0.0026 | ≤0.05 |
Claims (3)
1. A method for producing a water purifying agent by using powder AD-15 is characterized in that the chemical components (weight percent) are 10-15% of metallicaluminum and Al2O370～75％，SiO22-10% of powder AD-15, 2-6% of MgO and less than 2% of C is put into sulfuric acid with the concentration of 15-30%, and metal aluminum and Al in the powder AD-152O3Reacting with sulfuric acid to generate hydrogen and aluminum sulfate, reacting 1Kg of powder AD-15 with 5-7 liters of 15-30 percent sulfuric acid, and reacting metal aluminum and Al in the powder AD-152O3Reacting with sulfuric acid, filtering, and drying at a temperature of over 100 ℃ to obtain solid aluminum sulfate.
2. The method as claimed in claim 1, characterized in that after the sulfuric acid is reacted with the powder AD-15 and before filtration, corresponding water-soluble sulfides are added according to the measured content of heavy metals, heavy metal ions react with the sulfides to form insoluble precipitates, and the insoluble heavy metal precipitates are removed by filtration, thereby obtaining the required aluminum sulfate water purifying agent.
3. A method for producing a water purifying agent by using powder AD-15 is characterized in that the chemical components (weight percent) are 10-15% of metallic aluminum and Al2O370～75％，SiO22-10% of powder AD-15, 2-6% of MgO and less than 2% of C are put into 20% hydrochloric acid, 1kg of powder AD-15 and 2-4 liters of 20% hydrochloric acid are used, after the powder AD-15 is dissolved in the hydrochloric acid, the mixture is continuously stirred to prevent the powder AD-15 from sinking to the bottom and ensure the complete reaction, after the reaction is carried out for 6-10 hours, the reaction solution is adjusted to ensure that the specific gravity of the reaction solution is 1.2-1.3 g/cm3And then preserving the temperature to enable the solution to naturally react andpolymerize, keeping the pH value between 3.5 and 4.5 in the reaction process all the time, and filtering the solution and removing the precipitate to obtain the polyaluminium chloride after 24 hours of reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97120346A CN1055670C (en) | 1997-12-11 | 1997-12-11 | Method for producing water purifying agent using powder AD-5 as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97120346A CN1055670C (en) | 1997-12-11 | 1997-12-11 | Method for producing water purifying agent using powder AD-5 as raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1184779A true CN1184779A (en) | 1998-06-17 |
| CN1055670C CN1055670C (en) | 2000-08-23 |
Family
ID=5175913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97120346A Expired - Fee Related CN1055670C (en) | 1997-12-11 | 1997-12-11 | Method for producing water purifying agent using powder AD-5 as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1055670C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195749A (en) * | 2015-10-10 | 2015-12-30 | 江苏海光金属有限公司 | Production system for manufacturing AD powder through scrap aluminum |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2224888A (en) * | 1938-03-16 | 1940-12-17 | John H Walthall | Making aluminum sulphate |
| US2350575A (en) * | 1941-03-11 | 1944-06-06 | Pennsylvania Salt Mfg Co | Manufacture of aluminum sulphate products |
| CN87103009A (en) * | 1987-05-06 | 1987-09-30 | 德阳市孝泉化工厂 | The production method of poly aluminum chloride compound |
| CN1069006A (en) * | 1991-07-30 | 1993-02-17 | 湖南永兴县化学钙塑厂 | A kind of method of producing polymerize aluminum chloride |
| CN1153141A (en) * | 1996-08-15 | 1997-07-02 | 张德明 | Process for producing liquid aluminium sulfate by one-step acid dissolving through natural reaction |
-
1997
- 1997-12-11 CN CN97120346A patent/CN1055670C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195749A (en) * | 2015-10-10 | 2015-12-30 | 江苏海光金属有限公司 | Production system for manufacturing AD powder through scrap aluminum |
| CN105195749B (en) * | 2015-10-10 | 2017-05-17 | 江苏海光金属有限公司 | Production system for manufacturing AD powder through scrap aluminum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055670C (en) | 2000-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5348662A (en) | Process for removing heavy metals from aqueous solutions | |
| US4943377A (en) | Method for removing dissolved heavy metals from waste oils, industrial wastewaters, or any polar solvent | |
| US4136199A (en) | Metallic ion removal from phosphoric acid | |
| US5472618A (en) | Method for recovering metals from solutions | |
| CN114524452A (en) | Nano lanthanum carbonate hydrate and preparation method and application thereof | |
| HU207498B (en) | Process for removing heavy metals from waste waters and process for producing precipitating agent for them | |
| Xaba et al. | SYNTHESIS OF SILVER SULFIDE NANOPARTICLES THROUGH HOMOGENEOUS PRECIPITATION ROUTE AND THE PREPARATION OF THE Ag 2 S-CHITOSAN NANOCOMPOSITES FOR THE REMOVAL OF IRON (II) ION FROM WASTEWATER. | |
| DE2642198C3 (en) | Process for the separation of Cd + + ions from waste water and aqueous solutions | |
| DE3917412C2 (en) | Process for the preparation of a composition for treating contaminated water | |
| US4073706A (en) | Brine treatment for trace metal removal | |
| CN1184779A (en) | Method for producing water purifying agent using powder AD-5 as raw material | |
| CN113896302B (en) | Method for treating cadmium-containing wastewater by using calcium carbonate and method for recovering cadmium ions | |
| CN113582372A (en) | Method for treating high-temperature environment-friendly scarlet pigment cadmium-containing or/and fluorine-containing wastewater | |
| FI102160B (en) | A method for improving the usability of a water treatment chemical and a precipitant | |
| CN1088892A (en) | The manufacture method of polyphosphoric aluminium chloride coagulant | |
| CN1099728A (en) | Impurity removing method from perferrite solution | |
| CN1099720A (en) | Preparing method for zinc polysilicate flocculate agent and use | |
| KR20010098080A (en) | Process for recovering selectively zinc component from the electric furnace dust | |
| DE3004825A1 (en) | FELLOW AGENTS, METHOD FOR THE PRODUCTION THEREOF, AND THE USE THEREOF FOR THE DEPHOSPHATIZATION OF WASTE WATER | |
| CN113023850B (en) | Method for preparing multifunctional material of composite soil stabilizer and water body flocculant | |
| SU833573A1 (en) | Method of purifying waste water from heavy non-ferrous metals | |
| JPS643549B2 (en) | ||
| CN112897658B (en) | Method for preparing polyaluminum chloride composite flocculant by using sludge from aluminum profile plant | |
| RU2096501C1 (en) | Method of recovering tin from aqueous solutions | |
| RU2181782C1 (en) | Extraction of molybdenum from aqueous solutions of tungstates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |