CN101774648A - Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process - Google Patents
Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process Download PDFInfo
- Publication number
- CN101774648A CN101774648A CN201010106922A CN201010106922A CN101774648A CN 101774648 A CN101774648 A CN 101774648A CN 201010106922 A CN201010106922 A CN 201010106922A CN 201010106922 A CN201010106922 A CN 201010106922A CN 101774648 A CN101774648 A CN 101774648A
- Authority
- CN
- China
- Prior art keywords
- phosphorus
- ferro
- gained
- filter cake
- roasting
- 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.)
- Pending
Links
Landscapes
- Compounds Of Iron (AREA)
Abstract
The invention relates to a method for preparing high-purity iron oxide and trisodium phosphate by a ferro-phosphorus alkalization process, which comprises the following steps of: mixing ferro-phosphorus slag with calcined soda and then roasting the mixture; performing water immersion on a roasted product, and using filter residues obtained after the water immersion to prepare the high-purity iron oxide; and using the filtrate obtained after the water immersion of the roasted product to prepare the trisodium phosphate. The process provided by the invention can fully utilize the iron and phosphorus elements in ferro-phosphorus at the same time, and has a certain value in energy-saving and emission-reduction; the comprehensive utilization ratio of the ferro-phosphorus is high, the conversion rate of the iron element can reach 91.3 to 93.2, the conversion rate of the phosphorus element can reach 89.8 to 91.1 percent, the product added value is high, the prepared high-purity iron oxide accords with a national standard HG/T 2574-94, the iron trioxide content can reach 98.8 to 99.4 percent; and compared with the existing common method for producing high-purity industrial iron oxide, the method for preparing the high-purity iron oxide and the trisodium phosphate by the ferro-phosphorus alkalization process greatly reduces the production cost, has a simple production process and non-demanding conditions, and is easy to implement.
Description
Technical field
The invention belongs to the by product ferrophosphorus comprehensive utilization field of thermal phosphoric acid and production of phosphate fertilizer, be specifically related to the method that a kind of ferro-phosphorus alkalization process prepares high purity ferric oxide and tertiary sodium phosphate.
Background technology
High purity ferric oxide (ferric oxide) is a kind of important chemical product, mainly as soft magnetic ferrite, hard ferrite, rubbing paste and other industrial raw materials.The production of ferric oxide at present mainly contains dry method and two kinds of technologies of wet method.Dry process has green vitriol calcination method, iron oxide yellow calcination method, ferrous sulfate-soda ash calcination method, and its route is short, but energy consumption is big, severe reaction conditions.Wet processing comprises sulphate process, nitrate process, nitration mixture salt method.The main processes of this method is: the crystal seed input is equipped with Fe
2+In the reactive tank of solution, and add iron filings therein, temperature remains on 75 ℃-85 ℃, and aerating oxygen (or air) is with Fe
2+Be oxidized to Fe
3+, Fe
3+With the OH in the water
-In conjunction with and be deposited on seed surface, obtain the ferric oxide crystal, obtain the high purity ferric oxide product through high-temperature calcination again.Wet processing is higher to ingredient requirement, route complexity, production cost height.
Tertiary sodium phosphate is widely used in industrial circles such as cleaning, printing and dyeing, coating as water-softening chemicals, boiler cleaning and washing composition, nonmetal rust-preventive agent, fabric mercerising toughener.At present domestic main by acid-base neutralisation method production tertiary sodium phosphate, with phosphoric acid and soda ash neutralization, form Sodium phosphate dibasic, add caustic soda then and generate tertiary sodium phosphate.Preparing tertiary sodium phosphate by ferrophosphorus is the disposable technology that adopts oxidizing roasting, and ferrophosphorus send fine crusher to carry out abrasive dust after crusher is just broken, crosses 150 mesh sieve, mixes with a certain proportion of yellow soda ash, carries out oxidizing roasting then.
Ferrophosphorus is a kind of by product in thermal phosphoric acid and the phophatic fertilizer production process, ferro element quality percentage composition 60%-70%, phosphoric quality percentage composition 20%-30%.The ferrophosphorus of domestic and foreign current utilize method mainly be with ferrophosphorus below fines crusher in crushing to 80 order, be used for metallurgical industry as the additive in the special iron alloy production.CN85104780 discloses a kind of method of calcium hydrophosphate forage from ferrophosphorus, be to mix with mineral substance lime carbonate and ferrophosphorus, roasting oxidation at high temperature, leach roasting material with mineral acid then, leaching liquid is neutralized to pH6-7 with milk of lime, or under the situation of heating and the mineral substance calcium carbonate reaction, the throw out that reaction generates after filtration, after the drying, make the calcium hydrogen phosphate fodder product, this patent of invention does not relate to the utilization to ferro element in the ferrophosphorus.
CN101417821A discloses a kind of method of preparing iron oxide red and cogenerating trisodium phosphate by ferro-phosphorus, behind the ferrophosphorus powder and yellow soda ash mixing oven dry with 38 μ m-62 μ m, at 450 ℃ of-650 ℃ of low-temperature bakes, again 700 ℃ of-850 ℃ of high-temperature roastings, calcining matter is 80 ℃ of-90 ℃ of leachings, the washing of filtration gained filter cake, oven dry make red iron oxide, and wash water mixes with filtrate after absorbing roasting tail gas, makes tertiary sodium phosphate through concentrated, crystallization, drying.Though this patent of invention proposes ferro element in the ferrophosphorus and phosphoric are utilized simultaneously, re-baking is adopted in technical process, in low, the high-temperature roasting time is longer, energy consumption is bigger, the P of generation
2O
5Gas is more, needs to absorb with wash water, and product ferric oxide red colorant added value is lower.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of by product ferrophosphorus slag of yellow phosphorus factory and fused(calcium magnesium)phosphate factory that utilizes to adopt alkalization process to prepare high purity ferric oxide and tertiary sodium phosphate, this technology can make full use of ferro element and the phosphoric in the ferrophosphorus, and operational path is simple, be easy to realize that product high purity ferric oxide added value is higher.
The present invention for the solution that problem adopts of the above-mentioned proposition of solution is: ferro-phosphorus alkalization process prepares the method for high purity ferric oxide and tertiary sodium phosphate, it is characterized in that it comprises the steps:
1) roasting
Is 1 with ferrophosphorus and soda ash by mass ratio: 1.0-1.2 mixes, and under the state of bubbling air, in 700 ℃ of-850 ℃ of following roasting 1-3 hours, obtains product of roasting;
2) water logging and filtration
Under 60 ℃-75 ℃, is 1 by product of roasting and water logging water consumption mass ratio with step 1) gained product of roasting: 6.5-8 water logging 2 hours at least, and water logging finishes after-filtration, obtains filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation slowly adds the sulfuric acid that mass concentration is 60%-85%, and filter cake and sulfuric acid mass ratio are 1: 1-1.9,140 ℃ of-220 ℃ of following acidolysis at least 1 hour, add entry simultaneously and promote hydrolysis, obtain acidolysis solution;
4) reduction
Step 3) gained acidolysis solution liquid is cooled to 70 ℃-90 ℃, adds iron powder, wherein the mol ratio of ferro element is 0.3-0.5 in iron powder and the ferrophosphorus: 1, under the mixing speed 400-800rpm, reacted 1-3 hour, and obtain FeSO
4Solution;
5) removal of impurities
With step 4) gained FeSO
4Add alkaline matter in the solution, adjust the pH value, reaction finishes after-filtration, obtains filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained filtrate after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln, reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake under 600 ℃-800 ℃, was calcined 1-4 hour more successively with drying after bicarbonate of ammonia dilute solution and the water washing, obtained the high purity ferric oxide product;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is through concentrating under reduced pressure, 0 ℃ of following crystallization, vacuum-drying, makes tertiary sodium phosphate.
Press such scheme, described alkaline matter is NaOH, NaCO
3, KOH and KCO
3In any one or multiple mixing.
Press such scheme, the described ferrophosphorus particle diameter of step 1) is that 75 μ m-150 μ m reach more than 98%.Particle diameter is too small, can cause sintering, and can increase influences water logging and acidolysis required time, increases the energy consumption of follow-up unit operation, reduces yield; The ferrophosphorus powder particle diameter is excessive, can increase the consumption of soda ash in the roasting process.Therefore, the preferred 75 μ m-150 μ m of described ferrophosphorus powder particle diameter reach more than 98.
Press such scheme, the described pH value of step 5) transfers to 5.0-5.4.
The present invention adopts bakes to burn the article technology.Is 1 with ferrophosphorus and soda ash by mass ratio: 1.0-1.2 mixes, and under the state of bubbling air, in 700 ℃ of-850 ℃ of following roasting 1-3 hours, does not have P in the roasting process
2O
5Gas produces.
FeSO before the removal of impurities
4Major impurity in the solution is Al
3+With alkaline matters such as NaOH filtrate pH value is transferred to 5.0～5.4, make Al
3+With Al (OH)
3Sedimentary form is separated out, and reaches to purify FeSO
4Solution.
Technology provided by the present invention obtains the oxide compound of iron by the ferro-phosphorus alkalization roasting, and the oxide compound of iron is by acidolysis, reduction, removal of impurities, FeCO
3Unit operations such as synthetic, calcining prepare high purity ferric oxide, by-product tertiary sodium phosphate simultaneously.
The present invention has following beneficial effect:
1) technology provided by the present invention can make full use of ferro element and the phosphoric in the ferrophosphorus simultaneously, has certain value aspect energy-saving and emission-reduction;
2) ferrophosphorus comprehensive utilization ratio height, the transformation efficiency of ferro element can reach 91.3%-93.2%, and the transformation efficiency of phosphoric can reach 89.8%-91.1%.Added value of product height, prepared high purity ferric oxide meet national standard HG/T 2574-94, and ferric oxide content can reach 98.8%-99.4%.
3) compare with the production method commonly used of existing industrial high purity ferric oxide, production cost reduces significantly.
4) production technique is simple, and condition is not harsh, is easy to realize.
Description of drawings
Fig. 1 prepares high purity ferric oxide and tertiary sodium phosphate process flow diagram for ferro-phosphorus alkalization process.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following enforcement.
Embodiment 1
In the present embodiment, ferro element quality percentage composition is 62.6% in the ferrophosphorus, and phosphorus element content quality percentage composition is 23.8%: prepare high purity ferric oxide and tertiary sodium phosphate technical process by Fig. 1 ferro-phosphorus alkalization process:
1) roasting
Ferrophosphorus is through pulverizing, crossing 100 mesh sieves, and particle diameter 150 μ m account for more than 98%, with soda ash be to mix at 1: 1.1 by mass ratio, 700 ℃ of following aerobic roastings 3 hours, be chilled to room temperature;
2) water logging and filtration
After step 1) gained product of roasting is chilled to room temperature, be to add 60 ℃ hot water water loggings at 1: 6.5 by product of roasting and water logging water consumption mass ratio, water logging was filtered after 4 hours, obtained filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation, slowly add mass concentration with quality such as filter cake and be 60% sulfuric acid, 140 ℃ of following acidolysis 4 hours add a small amount of distilled water simultaneously, obtain acidolysis solution;
4) reduction
With acidolysis solution liquid cooling to 80 ℃, be to add iron powder at 0.4: 1 by the mol ratio of ferro element in iron powder and the ferrophosphorus, under the mixing speed 400rpm, keeping temperature is 80 ℃, sustained reaction 3 hours obtains light green FeSO
4Solution;
5) removal of impurities
At step 4) gained FeSO
4Add NaOH in the solution, the pH value is transferred to 5.0, the adularescent flocks is separated out.Precipitate complete after-filtration, obtain filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained FeSO after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln
4Solution has FeCO
3Crystal is separated out, and adds FeSO this moment fast
4Solution, crystal is grown up rapidly.Reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake successively with bicarbonate of ammonia dilute solution and less water washing back oven dry, in 600 ℃ of calcinings 4 hours, is obtained the high purity ferric oxide product again, and ferric oxide content is 98.8%, and color is a maroon;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is under the 0.08MPa in vacuum tightness, temperature is 60 ℃, concentrating under reduced pressure, gained tertiary sodium phosphate supersaturated solution is chilled to 0 ℃ of crystallization; The gained crystal is 0.08MPa in vacuum tightness, temperature be 60 ℃ of following vacuum-dryings to constant weight, make tertiary sodium phosphate.
Embodiment 2
In the present embodiment, ferro element quality percentage composition is 62.6% in the ferrophosphorus, and phosphorus element content quality percentage composition is 23.8%:
1) roasting
Ferrophosphorus is through pulverizing, crossing 120 mesh sieves, and particle diameter 125 μ m reach more than 98%, by with soda ash be to mix at 1: 1.2 by mass ratio, 750 ℃ of following aerobic roastings 3 hours, be chilled to room temperature;
2) water logging and filtration
After step 1) gained product of roasting is chilled to room temperature, be to add 70 ℃ hot water water loggings at 1: 7 by product of roasting and water logging water consumption mass ratio, water logging was filtered after 4 hours, obtained filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation, be that slowly to add mass concentration at 1: 1.3 be 70% sulfuric acid by filter cake and sulfuric acid mass ratio, 180 ℃ of following acidolysis 4 hours add a small amount of distilled water simultaneously, obtain acidolysis solution;
4) reduction
With acidolysis solution liquid cooling to 70 ℃, be to add iron powder at 0.3: 1 by the mol ratio of ferro element in iron powder and the ferrophosphorus, under the mixing speed 600rpm, keeping temperature is 70 ℃, sustained reaction 2 hours obtains light green FeSO
4Solution;
5) removal of impurities
At step 4) gained FeSO
4Add NaCO in the solution
3, the pH value is transferred to 5.2, the adularescent flocks is separated out.Precipitate complete after-filtration, obtain filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained FeSO after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln
4Solution has FeCO
3Crystal is separated out, and adds FeSO this moment fast
4Solution, crystal is grown up rapidly.Reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake successively with bicarbonate of ammonia dilute solution and less water washing back oven dry, in 700 ℃ of calcinings 3 hours, is obtained the high purity ferric oxide product again, and ferric oxide content is 98.8%, and color is a maroon;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is under the 0.08MPa in vacuum tightness, temperature is 60 ℃, concentrating under reduced pressure, gained tertiary sodium phosphate supersaturated solution is chilled to 0 ℃ of crystallization; The gained crystal is 0.08MPa in vacuum tightness, temperature be 60 ℃ of following vacuum-dryings to constant weight, make tertiary sodium phosphate.
Embodiment 3
In the present embodiment, ferro element quality percentage composition is 62.6% in the ferrophosphorus, and phosphorus element content quality percentage composition is 23.8%:
1) roasting
Ferrophosphorus is through pulverizing, crossing 200 mesh sieves, and particle diameter 75 μ m reach more than 98%, by with soda ash be to mix at 1: 1.2 by mass ratio, 800 ℃ of following aerobic roastings 2 hours, be chilled to room temperature;
2) water logging and filtration
After step 1) gained product of roasting is chilled to room temperature, be to add 75 ℃ hot water water loggings at 1: 7.5 by product of roasting and water logging water consumption mass ratio, water logging was filtered after 2 hours, obtained filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation, be that slowly to add mass concentration at 1: 1.5 be 85% sulfuric acid by filter cake and sulfuric acid mass ratio, 200 ℃ of following acidolysis 3 hours add a small amount of distilled water simultaneously, obtain acidolysis solution;
4) reduction
With acidolysis solution liquid cooling to 80 ℃, be to add iron powder at 0.4: 1 by the mol ratio of ferro element in iron powder and the ferrophosphorus, under the mixing speed 600rpm, keeping temperature is 80 ℃, sustained reaction 2 hours obtains light green FeSO
4Solution;
5) removal of impurities
At step 4) gained FeSO
4Add NaOH and NaCO in the solution
3, the pH value is transferred to 5.4, the adularescent flocks is separated out.Precipitate complete after-filtration, obtain filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained FeSO after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln
4Solution has FeCO
3Crystal is separated out, and adds FeSO this moment fast
4Solution, crystal is grown up rapidly.Reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake successively with bicarbonate of ammonia dilute solution and less water washing back oven dry, in 750 ℃ of calcinings 2 hours, is obtained the high purity ferric oxide product again, and ferric oxide content is 99.1%, and color is a red-brown;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is under the 0.08MPa in vacuum tightness, temperature is 60 ℃, concentrating under reduced pressure, gained tertiary sodium phosphate supersaturated solution is chilled to 0 ℃ of crystallization; The gained crystal is 0.08MPa in vacuum tightness, temperature be 60 ℃ of following vacuum-dryings to constant weight, make tertiary sodium phosphate.
Embodiment 4
In the present embodiment, ferro element quality percentage composition is 62.6% in the ferrophosphorus, and phosphorus element content quality percentage composition is 23.8%:
1) roasting
Ferrophosphorus is through pulverizing, crossing 150 mesh sieves, and particle diameter 90 μ m reach more than 98%, by with soda ash be to mix at 1: 1.2 by mass ratio, 850 ℃ of following aerobic roastings 3 hours, be chilled to room temperature;
2) water logging and filtration
After step 1) gained product of roasting is chilled to room temperature, be to add 75 ℃ hot water water loggings at 1: 8 by product of roasting and water logging water consumption mass ratio, water logging was filtered after 3 hours, obtained filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation, be that slowly to add mass concentration at 1: 1.9 be 80% sulfuric acid by filter cake and sulfuric acid mass ratio, 220 ℃ of following acidolysis 2 hours add a small amount of distilled water simultaneously, obtain acidolysis solution;
4) reduction
With acidolysis solution liquid cooling to 90 ℃, be to add iron powder at 0.5: 1 by the mol ratio of ferro element in iron powder and the ferrophosphorus, under the mixing speed 800rpm, keeping temperature is 90 ℃, sustained reaction 2 hours obtains light green FeSO
4Solution;
5) removal of impurities
At step 4) gained FeSO
4Add KOH in the solution, the pH value is transferred to 5.4, the adularescent flocks is separated out.Precipitate complete after-filtration, obtain filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained FeSO after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln
4Solution has FeCO
3Crystal is separated out, and adds FeSO this moment fast
4Solution, crystal is grown up rapidly.Reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake successively with bicarbonate of ammonia dilute solution and less water washing back oven dry, in 800 ℃ of calcinings 1 hour, is obtained the high purity ferric oxide product again, and ferric oxide content is 99.4%, and color is a red-brown;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is under the 0.08MPa in vacuum tightness, temperature is 60 ℃, concentrating under reduced pressure, gained tertiary sodium phosphate supersaturated solution is chilled to 0 ℃ of crystallization; The gained crystal is 0.08MPa in vacuum tightness, temperature be 60 ℃ of following vacuum-dryings to constant weight, make tertiary sodium phosphate.
Claims (4)
1. ferro-phosphorus alkalization process prepares the method for high purity ferric oxide and tertiary sodium phosphate, it is characterized in that it comprises the steps:
1) roasting
Is 1 with ferrophosphorus and soda ash by mass ratio: 1.0-1.2 mixes, and under the state of bubbling air, in 700 ℃ of-850 ℃ of following roasting 1-3 hours, obtains product of roasting;
2) water logging and filtration
Under 60 ℃-75 ℃, is 1 by product of roasting and water logging water consumption mass ratio with step 1) gained product of roasting: 6.5-8 water logging 2 hours at least, and water logging finishes after-filtration, obtains filtrate and filter cake;
3) acidolysis
With step 2) the gained filter cake under agitation slowly adds the sulfuric acid that mass concentration is 60%-85%, and filter cake and sulfuric acid mass ratio are 1: 1-1.9,140 ℃ of-220 ℃ of following acidolysis at least 1 hour, add entry simultaneously and promote hydrolysis, obtain acidolysis solution;
4) reduction
Step 3) gained acidolysis solution liquid is cooled to 70 ℃-90 ℃, adds iron powder, wherein the mol ratio of ferro element is 0.3-0.5 in iron powder and the ferrophosphorus: 1, under the mixing speed 400-800rpm, reacted 1-3 hour, and obtain FeSO
4Solution;
5) removal of impurities
With step 4) gained FeSO
4Add alkaline matter in the solution, adjust the pH value, reaction finishes after-filtration, obtains filter cake and filtrate;
6) FeCO
3Synthetic and filter
Gained filtrate after the removal of impurities of slow adding step 5) in ammonium bicarbonate soln, reaction finishes after-filtration, obtains filter cake and filtrate;
7) oven dry of filter cake and calcining
Step 6) gained filter cake under 600 ℃-800 ℃, was calcined 1-4 hour more successively with drying after bicarbonate of ammonia dilute solution and the water washing, obtained the high purity ferric oxide product;
8) preparation of tertiary sodium phosphate
With step 2) gained filtrate is through concentrating under reduced pressure, 0 ℃ of following crystallization, vacuum-drying, makes tertiary sodium phosphate.
2. the method for preparing high purity ferric oxide and tertiary sodium phosphate by the described ferro-phosphorus alkalization process of claim 1 is characterized in that described alkaline matter is NaOH, NaCO
3, KOH and KCO
3In any one or multiple mixing.
3. by the method for preparing high purity ferric oxide and tertiary sodium phosphate by claim 1 or 2 described ferro-phosphorus alkalization process, it is characterized in that the described ferrophosphorus particle diameter of step 1) is that 75 μ m-150 μ m reach more than 98%.
4. the method for preparing high purity ferric oxide and tertiary sodium phosphate by claim 1 or 2 described ferro-phosphorus alkalization process is characterized in that the described pH value of step 5) transfers to 5.0-5.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010106922A CN101774648A (en) | 2010-02-02 | 2010-02-02 | Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010106922A CN101774648A (en) | 2010-02-02 | 2010-02-02 | Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101774648A true CN101774648A (en) | 2010-07-14 |
Family
ID=42511274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010106922A Pending CN101774648A (en) | 2010-02-02 | 2010-02-02 | Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101774648A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424426A (en) * | 2011-09-07 | 2012-04-25 | 昆明理工大学 | Method for preparing iron oxide red and sodium phosphate by using yellow phosphorus by-product phosphor-iron slag |
| CN103693631A (en) * | 2013-12-25 | 2014-04-02 | 四川省乐山市福华通达农药科技有限公司 | Process for preparing trisodium phosphate from glyphosate mother liquid |
| CN110642646A (en) * | 2019-10-30 | 2020-01-03 | 福建桑玛作物营养科技有限公司 | Method for preparing calcium magnesium phosphate fertilizer from phosphorus-containing waste |
| CN113479938A (en) * | 2021-07-02 | 2021-10-08 | 内蒙古科技大学 | Method for preparing high-purity iron oxide by using iron oxide |
| CN115020659A (en) * | 2022-01-21 | 2022-09-06 | 昆明理工大学 | LiFePO 4 Preparation method of/C composite positive electrode material |
-
2010
- 2010-02-02 CN CN201010106922A patent/CN101774648A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424426A (en) * | 2011-09-07 | 2012-04-25 | 昆明理工大学 | Method for preparing iron oxide red and sodium phosphate by using yellow phosphorus by-product phosphor-iron slag |
| CN102424426B (en) * | 2011-09-07 | 2014-09-03 | 昆明理工大学 | Method for preparing iron oxide red and sodium phosphate by using yellow phosphorus by-product phosphor-iron slag |
| CN103693631A (en) * | 2013-12-25 | 2014-04-02 | 四川省乐山市福华通达农药科技有限公司 | Process for preparing trisodium phosphate from glyphosate mother liquid |
| CN103693631B (en) * | 2013-12-25 | 2016-01-06 | 四川省乐山市福华通达农药科技有限公司 | Glyphosate mother solution is utilized to produce the technique of tertiary sodium phosphate |
| CN110642646A (en) * | 2019-10-30 | 2020-01-03 | 福建桑玛作物营养科技有限公司 | Method for preparing calcium magnesium phosphate fertilizer from phosphorus-containing waste |
| CN113479938A (en) * | 2021-07-02 | 2021-10-08 | 内蒙古科技大学 | Method for preparing high-purity iron oxide by using iron oxide |
| CN115020659A (en) * | 2022-01-21 | 2022-09-06 | 昆明理工大学 | LiFePO 4 Preparation method of/C composite positive electrode material |
| CN115020659B (en) * | 2022-01-21 | 2023-04-18 | 昆明理工大学 | LiFePO 4 Preparation method of/C composite positive electrode material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101659406B (en) | Method for preparing iron phosphate from ferrophosphorus | |
| CN101792185B (en) | Method for preparing lamellar ferric oxide by ferreous solution ammonia precipitation method | |
| CN104445311B (en) | Clean poly-generation preparation method for flyash with high-content silicon dioxide | |
| CN101531355A (en) | Method for preparing high purity ferric phosphate using ferrous sulfate as by-product of white titanium pigment | |
| CN102220478B (en) | Preparation method for vanadium pentoxide | |
| CN103950956A (en) | Process for producing lithium carbonate from spodumene concentrate by sulfuric acid method | |
| CN104726705B (en) | A kind of chromite leaches the method for carrying chromium | |
| CN101640268A (en) | Preparation method of precursor iron phosphate of cathode material lithium iron phosphate of lithium ion battery | |
| CN101774648A (en) | Method for preparing high-purity iron oxide and trisodium phosphate by ferro-phosphorus alkalization process | |
| CN103094571B (en) | Method for preparing ferric pyrophosphate for lithium battery and ferric pyrophosphate prepared by method | |
| CN102897810A (en) | Method for producing aluminum oxide by using fly ash | |
| CN102424426B (en) | Method for preparing iron oxide red and sodium phosphate by using yellow phosphorus by-product phosphor-iron slag | |
| CN102674473B (en) | Process for preparing ferric oxide red by adopting iron vitriol | |
| CN104817099A (en) | Improved method for extracting alkali metal compound from solid fluorine reconstruction lepidolite | |
| CN113651342A (en) | Method for producing lithium product by processing lepidolite through nitric acid atmospheric pressure method | |
| CN104129814B (en) | A kind of method that is raw material production ammonium meta-vanadate with oil hydrogenation spent catalyst | |
| CN105540623A (en) | Method for preparing nanometer magnesia | |
| CN104760997A (en) | Production method of sodium chromate with alkali liquid circulation and liquid phase oxidization | |
| CN103159263B (en) | Treatment method of artificial rutile mother solution | |
| CN103910366A (en) | Method for preparing high-purity magnesium oxide by utilizing serpentinite | |
| CN101700903A (en) | Process for preparing nanometer ZnO | |
| CN105110784A (en) | Method for preparing manganese zinc ferrite by using artificial rutile mother liquor | |
| CN110331297B (en) | Method for preparing vanadium pentoxide from vanadium slag in short process | |
| CN107640779A (en) | Spodumene produces lithium carbonate technique | |
| WO2017215131A1 (en) | Method for preparing lixfeypzo4 from ferrophosphorus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100714 |