A kind of method that titanium dioxide by-product ferrous sulfate prepares ferric phosphate
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of ferrous sulfate and by-products, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as environmental pollution, waste of sulfur and iron resources, etc., and achieve the effects of reducing pollution, saving resources and reducing emissions
Active Publication Date: 2019-01-01
贵州芭田新能源材料有限公司
View PDF7 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
This not only wastes sulfur and iron resources, but also causes environmental pollution
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0009] Add 1000kg of ferrous sulfate, a by-product of titanium dioxide, into 2200kg of tap water, stir to dissolve, filter out the residual solid at the bottom, then raise the temperature to 90~95℃, stir with air, add 10% dilute sulfuric acid to adjust the pH value to 3~4, and stir If turbidity occurs, add 100g of polyvinylamide flocculant, filter to remove solids, then add 9kg of sodium dihydrogen phosphate, stir to produce a large amount of turbidity, then add 100g of flocculant, filter to remove solids, add 563kg of sodium phosphate powder to the liquid Stir, and use 20% dilute phosphoric acid to control the pH value at 2.5~3, centrifuge filter and wash the precipitate to obtain high-purity iron phosphate. After testing, the impurity ions Ti, Al, Pb, Cr, etc. are all below 20ppm.
Embodiment 2
[0011] Add 1000kg of ferrous sulfate, a by-product of titanium dioxide, into 2200kg of tap water, stir to dissolve, filter out the residual solid at the bottom, then raise the temperature to 80~90°C, stir with air, add 20% dilute sulfuric acid to adjust the pH value at 3~4, Stir to produce turbidity, then add 100g of polyvinylamide flocculant, filter to remove solids, then add 16kg of sodium dihydrogen phosphate, stir to produce a large amount of turbidity, then add 100g of flocculant, filter to remove solids, add 558kg of sodium phosphate to the liquid Stir the powder, and use 10% dilute phosphoric acid to control the pH value at 2.5~3, centrifuge filter and wash the precipitate to obtain high-purity iron phosphate. After testing, the impurity ions Ti, Al, Pb, Cr, etc. are all below 20ppm.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a method for preparing iron phosphate from a titanium white byproduct ferrous sulfate. The method is characterized by comprising the following steps: preparing a saturated solution from the titanium white byproduct ferrous sulfate, filtering to remove the undissolved solid, heating to 80-95 DEG C, introducing air for stirring, adding dilute sulfuric acid to regulate the pH value to 3-4, stirring to generate turbidity, adding a flocculant, filtering to remove the solid, adding a small amount of sodium dihydrogen phosphate, stirring to generate abundant turbidity, adding a flocculant, filtering to remove the solid, adding sodium phosphate into the liquid, controlling the pH value at 1-3 or so by using dilute phosphoric acid, filtering to obtain the solid, and washing with deionized water to obtain the iron phosphate. The low-cost titanium white byproduct is utilized to prepare the iron phosphate, thereby saving the resources and lowering the pollution. The purification of ferrous sulfate and synthesis of iron phosphate are completed in one step, thereby enhancing the efficiency, and reducing the pollutant discharge. The discharged substances are basically phosphates, and can be used as a fertilizer.
Description
technical field [0001] The invention discloses a method for preparing ferric phosphate from a by-product of titanium dioxide, ferrous sulfate, and belongs to the technical field of chemical industry. Background technique [0002] Lithium-ion batteries for power are booming, and the production of lithium iron phosphate cathode materials is increasing rapidly. The iron source of lithium iron phosphate is mostly iron phosphate, and iron phosphate is often prepared by using ferrous sulfate or ferric sulfate, and iron sulfate is often derived from ferrous sulfate. Ordinary ferrous sulfate cannot meet the requirements for preparing ferric phosphate due to its low purity. High-purity ferrous sulfate is obtained by reacting pure iron powder with sulfuric acid, which causes lithium iron phosphate materials to compete with steel for resources, which is unfavorable in the long run. of. [0003] At the same time, my country is a big country in the production of titanium dioxide. When...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more