CN103159196A - Method for obtaining ceramic material from waste phosphoric acid liquid - Google Patents
Method for obtaining ceramic material from waste phosphoric acid liquid Download PDFInfo
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- CN103159196A CN103159196A CN2011104154927A CN201110415492A CN103159196A CN 103159196 A CN103159196 A CN 103159196A CN 2011104154927 A CN2011104154927 A CN 2011104154927A CN 201110415492 A CN201110415492 A CN 201110415492A CN 103159196 A CN103159196 A CN 103159196A
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- phosphoric acid
- waste
- oxide
- reaction
- oxide compound
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Abstract
The invention relates to a method for obtaining a ceramic material from a waste phosphoric acid liquid, comprising the following steps: Step 1, stirring the waste phosphoric acid, while adding an oxide of calcined dolomite or hydroxide thereof formed after hydrolysis; Step 2, stirring until the pH of the reaction liquid reaches 7.1-9 to stop adding the oxide or the hydroxide; and Step 3, stirring for reaction at room temperature for 4 h, then allowing to stand, suction filtering and discharging waste water, and drying the filtered solid at 150 DEG C for 1-2 h. According to the present invention, phosphoric acid in the waste phosphoric acid liquid is completely precipitated, the harm to the environment is reduced, while the generated waste residue can be fully used as the raw material for ceramic production, and the resources are greatly recovered and utilized. Making oxide or hydroxide by dolomite is simple in process and low in cost.
Description
Technical field
The present invention relates to a kind of processing of chemical waste, be specifically related to a kind of method of the waste liquid that produces in the Waste Acid From Hua Cheng Foil production process being recycled to make pottery.
Background technology
The Waste Acid From Hua Cheng Foil industry uses the dilute phosphoric acid of content 5% that aluminium foil surface is processed in a large number, when the content of aluminium in phosphoric acid reaches certain value, discharges as spent acid, contains AlPO in the waste phosphoric acid of this discharge
4Be about 2% left and right, phosphoric acid is about 4% left and right.And Waste Acid From Hua Cheng Foil producer is only the method that adopts film to reclaim to waste phosphoric acid, the phosphoric acid rate of recovery of this method only has 60%, does not also reclaim aluminum phosphate wherein, and aluminum phosphate is discharged as refuse, not only waste resource but also to environment, form again new pollution in the regenerative process of this external film.
Summary of the invention
For solving in the Waste Acid From Hua Cheng Foil industry, waste phosphoric acid liquid is reclaimed the problem that does not thoroughly cause environmental pollution and how to take full advantage of recover materials, the invention provides and a kind ofly utilize waste phosphoric acid liquid in oxide compound or oxyhydroxide and Waste Acid From Hua Cheng Foil to react to alleviate harm to environment, utilize simultaneously the waste residue that generates to produce the method for pottery, concrete scheme is as follows: a kind of method of obtaining ceramic raw material from waste phosphoric acid liquid, it is characterized in that, comprise the steps:
Step 1, waste phosphoric acid is stirred the oxyhydroxide of the formation after adding simultaneously oxide compound after dolomite calcination or this oxide compound through hydrolysis;
Step 2, the pH value that is stirred to reaction solution reach at 7.1～9 o'clock and stop adding oxide compound or oxyhydroxide;
Under step 3, normal temperature, stirring reaction is 4 hours, and is then standing, and suction filtration is also discharged waste water, will leach solid and dry 1-2 hour under 150 ℃.
Another preferred version of the present invention: in described waste phosphoric acid, the content of phosphoric acid is 4%～7%.
A preferred version more of the present invention, in described step 1, oxide compound is calcium oxide and magnesium oxide, the reaction of itself and phosphoric acid is:
2H
3PO
4+3CaO＝Ca
3(PO
4)
2↓+3H
2O
2H
3PO
4+3MgO＝Mg
3(PO
4)
2↓+3H
2O.
Another preferred version of the present invention: the oxyhydroxide in described step 1 is calcium hydroxide and magnesium hydroxide, and the reaction of itself and phosphoric acid is:
2H
3PO
4+3Ca(OH)
2＝Ca
3(PO
4)
2↓+6H
2O，
2H
3PO
4+3Mg(OH)
2＝Mg
3(PO
4)
2↓+6H
2O，
For guaranteeing that sufficient reacting carries out: the stirring in described step 1 is magnetic agitation.
The present invention utilizes oxide compound or oxyhydroxide and waste phosphoric acid to react, and makes waste phosphoric acid generate corresponding solid phosphoric acid root and water, then solids is leached, and has alleviated the harm of waste phosphoric acid to environment.Material after dolomite calcination also claims to forge white powder, and chemical composition is mainly calcium oxide and magnesium oxide, and forging the white powder hydrolysis rear is calcium hydroxide, magnesium hydroxide, also claims slaked lime.Utilize rhombspar to make oxide compound or oxyhydroxide technique is simple, cost is low.Magnetic agitation makes reaction process stable, abundant.This programme has been separated out the phosphoric acid in waste phosphoric acid liquid fully, has reduced the harm to environment, and produced simultaneously waste residue can fully as the raw material of making pottery, reclaim and utilize resource greatly.
Description of drawings
Accompanying drawing 1 reactions steps schematic diagram of the present invention.
Embodiment
As shown in Figure 1,101, waste phosphoric acid is stirred, the oxyhydroxide of the formation after adding simultaneously oxide compound after dolomite calcination or this oxide compound through hydrolysis; Adopt rhombspar can reduce costs as reactant and contained foreign material few, adopt the magnetic agitation can fast reaction speed during stirring.The mode of utilizing of rhombspar can be selected according to concrete environment for use, or hydrolysis after calcining or calcining.
102, the pH value that is stirred to reaction solution reaches at 7.1～9 o'clock and stops adding oxide compound or oxyhydroxide;
103, stirring reaction 4 hours under normal temperature, then standing, suction filtration is also discharged waste water, will leach solid and dry 1-2 hour under 150 ℃.The solid matter that obtain this moment just can be directly as the raw material of producing pottery.
Illustrate reaction process of the present invention below in conjunction with accompanying drawing:
Example 1, add 200g waste phosphoric acid liquid (4.5%) in the 500ml beaker, magnetic agitation, add the oxide compound after the 7g dolomite calcination, its major ingredient is calcium oxide and magnesium oxide, and stirring reaction 4h under normal temperature surveys pH 7.3, standing, suction filtration, solid is at 150 ℃ of oven dry 2h, and product 22g weighs to get.Phosphate content 50ppm in waste water after measured.
Wherein reaction formula is: 2H
3PO
4+ 3CaO=Ca
3(PO
4)
2↓+3H
20
2H
3PO
4+3MgO＝Mg
3(PO
4)
2↓+3H
2O
This programme adds the oxide compound of respective amount in the waste phosphoric acid of fixed amount, the phosphoric acid in waste phosphoric acid is reacted fully, has avoided the impact of waste phosphoric acid on environment, the solids that leaches simultaneously also as the raw material of producing ceramic product to be fully exploited.
Example 2, add 200g waste phosphoric acid liquid (4.5%) in the 500ml beaker, magnetic agitation, add the oxyhydroxide after 10g forges the white powder hydrolysis, its major ingredient is calcium hydroxide and magnesium hydroxide, and stirring reaction 5h under normal temperature surveys pH 7.1, standing, suction filtration, solid is at 150 ℃ of oven dry 1h, and product 22.6g weighs to get.Phosphate content in waste water is 8ppm after measured.
Wherein reaction formula is: 2H
3PO
4+ 3Ca (OH)
2=Ca
3(PO
4)
2↓+6H
2O
2H
3PO
4+3Mg(OH)
2＝Mg
3(PO
4)
2↓+6H
2O。
Example 3, add 200g waste phosphoric acid (4.5%) in the 500ml beaker, magnetic agitation, add the oxide compound after the 7.8g dolomite calcination, its major ingredient is calcium oxide and magnesium oxide, and surveying solution Ph value is 8.2, stirs 4h, standing, suction filtration, solid is at 150 ℃ of oven dry 2h, and product 22.5g weighs to get.Phosphate content in waste water is below 1ppm after measured.
Wherein reaction formula is: 2H
3PO
4+ 3CaO=Ca
3(PO
4)
2↓+3H
2O
2H
3PO
4+3MgO＝Mg
3(PO
4)
2↓+3H
2O。
Example 4, add 200g waste phosphoric acid (4.5%) in the 500ml beaker, magnetic agitation, add the oxyhydroxide after 11g forges the white powder hydrolysis, its major ingredient is calcium hydroxide and magnesium hydroxide, and stirring reaction 4h under normal temperature surveys pH 8.8, standing, suction filtration, solid is at 150 ℃ of oven dry 1h, and product 22.3g weighs to get.Phosphate content in waste water is below 1ppm after measured.
Wherein reaction formula is: 2H
3PO
4+ 3Cl (OH)
2=Cl
3(PO
4)
2↓+6H
2O
2H
3PO
4+3Mg(OH)
2＝Mg
3(PO
4)
2↓+6H
2O。
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
Claims (5)
1. a method of obtaining ceramic raw material from waste phosphoric acid liquid, is characterized in that, comprises the steps:
Step 1, waste phosphoric acid is stirred the oxyhydroxide of the formation after adding simultaneously oxide compound after dolomite calcination or this oxide compound through hydrolysis;
Step 2, the pH value that is stirred to reaction solution reach at 7.1～9 o'clock and stop adding oxide compound or oxyhydroxide;
Under step 3, normal temperature, stirring reaction is 4 hours, and is then standing, and suction filtration is also discharged waste water, will leach solid and dry 1-2 hour under 150 ℃.
2. the method for claim 1, is characterized in that, in described waste phosphoric acid, the content of phosphoric acid is 4%～7%.
3. the method for claim 1, is characterized in that, in described step 1, oxide compound is calcium oxide and magnesium oxide, and the reaction of itself and phosphoric acid is:
2H
3PO
4+3CaO＝Ca
3(PO
4)
2↓+3H
2O
2H
3PO
4+3MgO＝Mg
3(PO
4)
2↓+3H
2O.
4. the method for claim 1, the oxyhydroxide in described step 1 is calcium hydroxide and magnesium hydroxide, the reaction of itself and phosphoric acid is:
2H
3PO
4+3Ca(OH)
2＝Ca
3(PO
4)
2↓+6H
2O，
2H
3PO
4+3Mg(OH)
2＝Mg
3(PO
4)
2↓+6H
2O，
5. the method for claim 1, is characterized in that, the stirring in described step 1 is magnetic agitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104154927A CN103159196A (en) | 2011-12-14 | 2011-12-14 | Method for obtaining ceramic material from waste phosphoric acid liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104154927A CN103159196A (en) | 2011-12-14 | 2011-12-14 | Method for obtaining ceramic material from waste phosphoric acid liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103159196A true CN103159196A (en) | 2013-06-19 |
Family
ID=48582780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104154927A Pending CN103159196A (en) | 2011-12-14 | 2011-12-14 | Method for obtaining ceramic material from waste phosphoric acid liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156056A (en) * | 2019-04-18 | 2019-08-23 | 新疆众和股份有限公司 | A method of special-alumina is prepared containing phosphorus waste liquid using corrosive aluminum foil |
-
2011
- 2011-12-14 CN CN2011104154927A patent/CN103159196A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 吕根品等: ""化成箔废水除磷的研究"", 《广东化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156056A (en) * | 2019-04-18 | 2019-08-23 | 新疆众和股份有限公司 | A method of special-alumina is prepared containing phosphorus waste liquid using corrosive aluminum foil |
| CN110156056B (en) * | 2019-04-18 | 2021-12-28 | 新疆众和股份有限公司 | Method for preparing special alumina by using phosphorus-containing waste liquid generated by corroding aluminum foil |
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| DD01 | Delivery of document by public notice |
Addressee: Xuzhou Teruida Environmental Protection Technology Co., Ltd. Document name: the First Notification of an Office Action |
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Application publication date: 20130619 |