CN116216785A - Method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag - Google Patents
Method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag Download PDFInfo
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- CN116216785A CN116216785A CN202310038218.5A CN202310038218A CN116216785A CN 116216785 A CN116216785 A CN 116216785A CN 202310038218 A CN202310038218 A CN 202310038218A CN 116216785 A CN116216785 A CN 116216785A
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- ferrous
- waste acid
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- 239000002699 waste material Substances 0.000 title claims abstract description 38
- 239000002893 slag Substances 0.000 title claims abstract description 37
- 150000003839 salts Chemical class 0.000 title claims abstract description 35
- 239000002253 acid Substances 0.000 title claims abstract description 32
- 229960002089 ferrous chloride Drugs 0.000 title claims abstract description 25
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002386 leaching Methods 0.000 title claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 48
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 238000002425 crystallisation Methods 0.000 claims abstract description 33
- 230000008025 crystallization Effects 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 235000010215 titanium dioxide Nutrition 0.000 claims abstract description 12
- 239000008213 purified water Substances 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 150000003017 phosphorus Chemical class 0.000 claims abstract description 8
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 4
- 230000003311 flocculating effect Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims 1
- 239000000706 filtrate Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/10—Halides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for leaching and purifying ferrous chloride by using chloridized waste acid and fused salt slag, which comprises the following steps of 1) mixing and dissolving fused salt slag and titanium white waste acid, and adding polyacrylamide to obtain saturated ferrous liquid; 2) Adding the saturated ferrous liquid into a crystallization tank, stirring, cooling and filtering to obtain mother crystals; 3) Dissolving mother crystal in pure water to prepare solution, adding alkali to adjust pH to 3.5, adding phosphorus salt, and filtering by a diatomite-loaded filter device; 4) Introducing HCl gas into the filtrate, stirring, cooling, and filtering to obtain purified ferrous crystals; 5) Adding purified ferrous crystals into purified water at 80 ℃ to prepare a solution, adding the solution into a crystallization tank, stirring, cooling, centrifuging and filtering to obtain ferrous chloride crystals. The invention enables FeCl to be obtained 2 Can be separated from a solid-liquid system with a plurality of impurities to generate value; the property of solid dangerous wastes of molten salt slag is changed, the problems of difficult resource recovery, high environmental protection pressure and the like are solved, and the sustainable development capability of enterprises is improved.
Description
Technical Field
The invention relates to the technical field of purification, in particular to a method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag.
Background
Titanium tetrachloride is an important intermediate product for producing titanium dioxide and titanium sponge, and the main waste and side outlets of the molten salt chlorination method and the boiling chlorination method are respectively chlorinated waste acid after pulping of molten salt slag and dust collection slag. NaCl and FeCl as main components in molten salt slag 2 、MgCl 2 、CaCl 2 Mineral coke and the like, mixing lime after cooling and crushing, and neutralizing and stacking; feCl as main component in chloridizing waste acid 2 、MgCl 2 、AlCl 3 、MnCl 2 And the like, neutralizing the mixture into hydroxide slag by adding alkali, and stacking the hydroxide slag; both methods cannot realize resource utilization and have high environmental protection pressure.
The two substances which are high in waste side amount and are shared are FeCl 2 While FeCl in general 2 The production mode is mainly an evaporation crystallization method with high energy consumption, and FeCl is extracted from chlorinated waste acid and molten salt slag 2 At present, no effective separation and purification means exist.
Disclosure of Invention
The invention provides a method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag, which aims to solve the problems in the prior art.
The scheme of the invention is as follows:
a method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag comprises the following steps:
1) Mixing molten salt slag and titanium white waste acid according to the mass ratio of 0.8-1.5:1, stirring and dissolving until Fe in the solution 2+ Adding polyacrylamide with the mass fraction of 0.5% when the concentration reaches 140-160 g/L, and filtering while the mixture is hot after flocculation to obtain saturated ferrous liquid;
2) Adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain mother crystals;
3) The mother crystal is dissolved in pure water to prepare Fe 2+ Adding alkali into 100-130 g/L solution to adjust the pH to 3.5, adding 0.5-0.8% of phosphorus salt by mass percent, and filtering by a diatomite-loaded filter device;
4) Introducing HCl gas into the filtered liquid, pumping into a crystallization tank when the acidity reaches 21-25%, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain purified ferrous crystals;
5) Adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 240-260 g/L solution is pumped into a crystallization tank, stirred and cooled to 0 ℃ at a speed of 150-200 r/min, and centrifugally filtered to obtain ferrous chloride crystals with uniform particles and purity of 98 percent.
As a preferable technical characteristic, the molten salt slag and the titanium white waste acid in the step 1) are mixed according to a mass ratio of 1:1 for stirring and dissolving.
As a preferred feature, the crystallization pot in step 2) is stirred at a rate of 180 revolutions per minute.
As a preferable technical feature, the mother crystal in the step 3) is dissolved in pure water to be prepared into Fe 2+ 120g/L concentration.
As a preferable technical feature, the step 4) is carried out by stirring the mixture at a speed of 180 revolutions per minute after the acidity reaches 25%.
As a preferable technical feature, purified ferrous crystals are added with purified water at 80 ℃ to be dissolved and prepared into Fe 2+ 250g/L solution.
As a preferable technical feature, the mixture is poured into a crystallization tank and stirred at a speed of 180 revolutions per minute.
The method for leaching and purifying ferrous chloride by using the chloridized waste acid and the fused salt slag through the technical scheme comprises the following steps of 1) mixing the fused salt slag and the titanium white waste acid according to the mass ratio of 0.8-1.5:1, stirring and dissolving, and waiting for Fe in the solution 2+ Adding polyacrylamide with the mass fraction of 0.5% when the concentration reaches 140-160 g/L, and filtering while the mixture is hot after flocculation to obtain saturated ferrous liquid; 2) Adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at the speed of 150-200 rpm for preservingStanding for 30min, and filtering to obtain mother crystal; 3) The mother crystal is dissolved in pure water to prepare Fe 2+ Adding alkali into 100-130 g/L solution to adjust the pH to 3.5, adding 0.5-0.8% of phosphorus salt by mass percent, and filtering by a diatomite-loaded filter device; 4) Introducing HCl gas into the filtered liquid, pumping into a crystallization tank when the acidity reaches 21-25%, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain purified ferrous crystals; 5) Adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 240-260 g/L solution is pumped into a crystallization tank, stirred and cooled to 0 ℃ at a speed of 150-200 r/min, and centrifugally filtered to obtain ferrous chloride crystals with uniform particles and purity of 98 percent.
The invention has the advantages that:
the invention uses the FeCl in the chloridized waste acid and fused salt slag 2 The superposition of the contents reaches a supersaturation state to separate out crystals, and then flocculant and filter aid are added to remove tiny solid impurities, and pH is adjusted to precipitate Al, V and Fe 3+ Purifying Si and the like by a diatomite-loaded filter device, and finally purifying by recrystallization;
the method can realize Fe in double wastes 2+ The combination leaching of the molten salt slag and the solid dangerous waste property are changed, and the Fe is skillfully utilized 2+ In the dissolution balance of a complex acid water system, fe is introduced into a HCl gas way 2+ The unsaturated state is changed into a supersaturated state, so that the problem of high energy consumption caused by traditional evaporation and crystallization is avoided, and the prepared ferrous chloride crystal has uniform particles, high purity, reduced waste side amount and resource utilization.
So that FeCl 2 Can be separated from a solid-liquid system with a plurality of impurities to generate value; the property of solid dangerous wastes of molten salt slag is changed, the problems of difficult resource recovery, high environmental protection pressure and the like are solved, and the sustainable development capability of enterprises is improved.
Detailed Description
In order to overcome the defects, the invention provides a method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag, which solves the problems in the background technology.
A method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag comprises the following steps:
1) Mixing molten salt slag and titanium white waste acid according to the mass ratio of 0.8-1.5:1, stirring and dissolving until Fe in the solution 2+ Adding polyacrylamide with the mass fraction of 0.5% when the concentration reaches 140-160 g/L, and filtering while the mixture is hot after flocculation to obtain saturated ferrous liquid;
2) Adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain mother crystals;
3) The mother crystal is dissolved in pure water to prepare Fe 2+ Adding alkali into 100-130 g/L solution to adjust the pH to 3.5, adding 0.5-0.8% of phosphorus salt by mass percent, and filtering by a diatomite-loaded filter device;
4) Introducing HCl gas into the filtered liquid, pumping into a crystallization tank when the acidity reaches 21-25%, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain purified ferrous crystals;
5) Adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 240-260 g/L solution is pumped into a crystallization tank, stirred and cooled to 0 ℃ at a speed of 150-200 r/min, and centrifugally filtered to obtain ferrous chloride crystals with uniform particles and purity of 98 percent.
And in the step 1), mixing the molten salt slag and the titanium white waste acid according to the mass ratio of 1:1, and stirring and dissolving.
The crystallization pot in step 2) is stirred at a rate of 180 revolutions per minute.
The mother crystal in the step 3) is dissolved in pure water to be prepared into Fe 2+ 120g/L concentration.
And (3) when the acidity reaches 25%, pouring the mixture into a crystallization tank and stirring the mixture at a speed of 180 revolutions per minute.
Adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 250g/L solution.
Pouring into a crystallization tank and stirring at a speed of 180 revolutions per minute.
The invention is further described in connection with the following embodiments in order to make the technical means, the creation features, the achievement of the purpose and the effect of the invention easy to understand.
Example 1:
(1) stirring and dissolving molten salt slag and titanium white waste acid according to the mass ratio of 0.8:1, and waiting for Fe in the solution 2+ Adding PAM with the mass fraction of 0.5% when the concentration reaches 140g/L, and filtering while the mixture is hot after flocculation to obtain saturated ferrous liquid;
(2) adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 150/min, maintaining for 30min, and filtering to obtain mother crystals;
(3) dissolving the mother crystal in pure water to prepare a solution with concentration of Fe2+100g/L, adding alkali to adjust the pH to 3.5, adding 0.5 mass percent of phosphorus salt, and introducing the solution into a diatomite-loaded filter device for filtering;
(4) introducing fresh HCl gas into the filtrate, pouring into a crystallization tank when the acidity reaches 21%, stirring and cooling to 0 ℃ at a speed of 150 revolutions per minute, maintaining for 30min, and filtering to obtain purified ferrous crystals;
(5) adding purified ferrous crystals into purified water at 80 ℃ to dissolve and prepare Fe2+240g/L solution, pouring the solution into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 150 revolutions per minute, maintaining the temperature for 30min, and centrifugally filtering to obtain ferrous chloride crystals with uniform particles and purity of 98%.
Example 2
(1) Stirring and dissolving molten salt slag and titanium white waste acid according to a mass ratio of 1:1, adding PAM with a mass fraction of 0.5% when Fe < 2+ > in the solution reaches 150g/L, and filtering while the solution is hot after flocculation to obtain saturated ferrous liquid;
(2) adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 180 revolutions per minute, maintaining for 30min, and filtering to obtain mother crystals;
(3) dissolving the mother crystal in pure water to prepare a solution with concentration of Fe < 2+ > 120g/L, adding alkali to adjust the pH to 3.5, adding 0.8 mass percent of phosphorus salt, and introducing the solution into a diatomite-loaded filter device for filtering;
(4) introducing fresh HCl gas into the filtrate, pouring into a crystallization tank when the acidity reaches 25%, stirring and cooling to 0 ℃ at a speed of 180 revolutions per minute, maintaining for 30min, and filtering to obtain purified ferrous crystals;
(5) adding purified ferrous crystals into purified water at 80 ℃ to dissolve and prepare Fe2+250g/L solution, pouring the solution into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 180 revolutions per minute, maintaining the temperature for 30min, and centrifugally filtering to obtain ferrous chloride crystals with uniform particles and purity of 98%.
Example 3
(1) Stirring and dissolving molten salt slag and titanium white waste acid according to a mass ratio of 1.5:1, adding PAM with a mass fraction of 0.5% when Fe < 2+ > in the solution reaches 160g/L, flocculating, and filtering while the solution is hot to obtain saturated ferrous liquid;
(2) adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at the speed of 200 revolutions per minute, maintaining for 30min, and filtering to obtain mother crystals;
(3) dissolving the mother crystal in pure water to prepare a solution with concentration of Fe2+130g/L, adding alkali to adjust the pH to 3.5, adding 0.8 mass percent of phosphorus salt, and introducing the solution into a diatomite-loaded filter device for filtering;
(4) introducing fresh HCl gas into the filtrate, pouring into a crystallization tank when the acidity reaches 25%, stirring and cooling to 0 ℃ at a speed of 200 revolutions per minute, maintaining for 30min, and filtering to obtain purified ferrous crystals;
(5) adding purified ferrous crystals into purified water at 80 ℃ to dissolve and prepare Fe2+260g/L solution, pouring the solution into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 200 revolutions per minute, maintaining the temperature for 30min, and centrifugally filtering to obtain ferrous chloride crystals with uniform particles and purity of 98%.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The method for leaching and purifying ferrous chloride by using the chlorinated waste acid and molten salt slag is characterized by comprising the following steps:
1) Mixing molten salt slag and titanium white waste acid according to the mass ratio of 0.8-1.5:1, stirring and dissolving until Fe in the solution 2+ Adding polyacrylamide with the mass fraction of 0.5% when the concentration reaches 140-160 g/L, flocculating, and filtering while the mixture is hot to obtain a saturated solutionAnd a ferrous liquid;
2) Adding saturated ferrous liquid into a crystallization tank, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain mother crystals;
3) The mother crystal is dissolved in pure water to prepare Fe 2+ Adding alkali into 100-130 g/L solution to adjust the pH to 3.5, adding 0.5-0.8% of phosphorus salt by mass percent, and filtering by a diatomite-loaded filter device;
4) Introducing HCl gas into the filtered liquid, pumping into a crystallization tank when the acidity reaches 21-25%, stirring and cooling to 0 ℃ at a speed of 150-200 rpm, maintaining for 30min, and filtering to obtain purified ferrous crystals;
5) Adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 240-260 g/L solution is pumped into a crystallization tank, stirred and cooled to 0 ℃ at a speed of 150-200 r/min, and centrifugally filtered to obtain ferrous chloride crystals with uniform particles and purity of 98 percent.
2. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: and in the step 1), mixing the molten salt slag and the titanium white waste acid according to the mass ratio of 1:1, and stirring and dissolving.
3. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: the crystallization pot in step 2) is stirred at a rate of 180 revolutions per minute.
4. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: the mother crystal in the step 3) is dissolved in pure water to be prepared into Fe 2+ 120g/L concentration.
5. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: and (3) when the acidity reaches 25%, pouring the mixture into a crystallization tank and stirring the mixture at a speed of 180 revolutions per minute.
6. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: adding purified water at 80 ℃ into purified ferrous crystals to dissolve and prepare Fe 2+ 250g/L solution.
7. The method for leaching and purifying ferrous chloride by using chlorinated waste acid and molten salt slag according to claim 1, which is characterized in that: pouring into a crystallization tank and stirring at a speed of 180 revolutions per minute.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248497A (en) * | 1991-09-17 | 1993-09-28 | Kronos, Inc. | Production of purified iron chloride by a vacuum process in the manufacture of titanium dioxide |
| CN105883930A (en) * | 2016-05-26 | 2016-08-24 | 宜宾天原集团股份有限公司 | Production process for preparing iron red from chlorination process titanium dioxide byproduct chloride residues |
| CN110980833A (en) * | 2019-12-16 | 2020-04-10 | 斯瑞尔环境科技股份有限公司 | Preparation method of electronic-grade ferrous chloride |
| CN113582224A (en) * | 2021-09-06 | 2021-11-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Resource utilization method for titanium white waste acid leaching fused salt chlorination slag |
-
2023
- 2023-01-09 CN CN202310038218.5A patent/CN116216785A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248497A (en) * | 1991-09-17 | 1993-09-28 | Kronos, Inc. | Production of purified iron chloride by a vacuum process in the manufacture of titanium dioxide |
| CN105883930A (en) * | 2016-05-26 | 2016-08-24 | 宜宾天原集团股份有限公司 | Production process for preparing iron red from chlorination process titanium dioxide byproduct chloride residues |
| CN110980833A (en) * | 2019-12-16 | 2020-04-10 | 斯瑞尔环境科技股份有限公司 | Preparation method of electronic-grade ferrous chloride |
| CN113582224A (en) * | 2021-09-06 | 2021-11-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Resource utilization method for titanium white waste acid leaching fused salt chlorination slag |
Non-Patent Citations (2)
| Title |
|---|
| 化学工业部图书编辑室: "二氧化钛译文集（硫酸法）", 30 June 1965, 中国工业出版社, pages: 160 * |
| 孙洪涛: "氯化法钛白生产装置三废处理工艺改进", 钢铁钒钛, 31 December 2012 (2012-12-31), pages 35 * |
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