Extractant solution and extraction method for extracting titanium and iron from titanium-iron polymetallic chloride acidic solution

An acidic solution and multi-metal technology, which is applied to the extraction agent solution and extraction field of extracting titanium and iron, can solve the problem that the extraction capacity and selectivity of neutral organic phosphorus extractant are difficult to meet the requirements at the same time, it is difficult to extract and separate the target element, and the target element cannot be obtained. Wide application and other issues, to achieve the effect of cost reduction, increased washing process, strong extraction ability

Active Publication Date: 2019-11-05
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acidic organophosphorus extractant needs to add other substances in the stripping process, and it will take a long time to reach the extraction equilibrium, and the Ti 4+ The selectivity is not high, and it is difficult to extract and separate the target elements in the hydrochloric acid system, so it has not been widely used.
The extraction capacity and selectivity of neutral organic phosphorus extractants are difficult to meet the requirements at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1). With 20% (w / w, mass fraction) (C 4 h 9 ) 4 NCl+80% (w / w, mass fraction) oleyl alcohol polyoxyethylene ether is the organic phase, that is, the mass ratio of the two is 2:8, and at normal temperature (C 4 h 9 ) 4NCl and oleyl alcohol polyoxyethylene ether are mixed and melted or melted into a liquid; the concentration of hydrogen ions in the 2-stage countercurrent extraction is 6mol / L ilmenite hydrochloric acid leaching solution, the temperature is 30°C, compared to O / A=1, the time is 2min , the extraction rate of iron can reach 99.85%, the extraction rate of titanium can reach 99.96%, and the loaded organic phase can be obtained;

[0030] (2). The organic phase of step (1) was washed with hydrochloric acid with a concentration of 7 mol / L at a temperature of 30° C., compared to O / A=2, and the time was 3 minutes to obtain an organic phase free of impurities after washing;

[0031] (3). The organic phase of step (2) is back-extracted with 3-stage cross-flow hydro...

Embodiment 2

[0034] (1). With 30% (w / w, mass fraction) (C 4 h 9 ) 3 C 3 h 7 NBr+70% (w / w, mass fraction) oleyl alcohol polyoxyethylene ether phosphate is the organic phase, that is, the mass ratio of the two is 3:7, at normal temperature (C 4 h 9 ) 3 C 3 h 7 NBr and oleyl alcohol polyoxyethylene ether phosphate are mixed and melted or melted into a liquid; the concentration of hydrogen ions in the 3-stage countercurrent extraction is 7mol / L ilmenite hydrochloric acid leaching solution, the temperature is 35 ° C, compared to O / A = 1.5, time 2min, the extraction rate of iron can reach 99.99%, the extraction rate of titanium can reach 99.69%, and the loaded organic phase is obtained;

[0035] (2). The organic phase of step (1) was washed with deionized water at a temperature of 35° C., compared to O / A=2, and the time was 3 minutes to obtain an organic phase free of impurities after washing;

[0036] (3). The organic phase of step (2) is back-extracted with 4 stages of hydrochloric ac...

Embodiment 3

[0039] (1). Use 70% (C 3 h 7 ) 2 (C 7 h 15 ) 2 NHSO 4 (w / w, mass fraction)+30% (w / w, mass fraction) C 12 h 25 OH is the organic phase, that is, the mass ratio of the two is 7:3, at room temperature (C 3 h 7 ) 2 (C 7 h 15 ) 2 NHSO 4 and C 12 h 25 The OH is mixed and melted or melted into a liquid; the concentration of hydrogen ions in the three-stage countercurrent extraction is 8mol / L. The waste acid solution produced by the hydrochloric acid method is 50°C. Compared with O / A=1, the time is 7min. The extraction rate of iron can reach 99.99%, and the extraction rate of titanium can reach 99.78%, and the loaded organic phase can be obtained;

[0040] (2). The organic phase of step (1) was washed with hydrochloric acid with a concentration of 10 mol / L at a temperature of 50° C., compared to O / A=1.5, and the time was 5 min to obtain an organic phase free of impurities after washing;

[0041] (3). The organic phase of step (2) is back-extracted with 2 stages of hyd...

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Abstract

The invention discloses an extraction agent solution and an extraction method for extracting titanium and iron from an acidic solution containing titanium and iron polymetallic chlorides, which consist of an extraction agent and a diluent; the extraction agent is a quaternary ammonium salt R 4 One or more of NX, N-alkylamide, N, N-dialkylamide and diethanolamide; the diluent is oleyl alcohol, oleyl alcohol derivatives, alkanol and liquid acetic acid at normal temperature One or more of ester compounds. The technical scheme of the invention has strong extracting ability for ferro-titanium, quick balance, good selectivity, easy stripping, good separation, and is economical and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy or chemical industry, and in particular relates to an extractant solution and an extraction method for extracting titanium and iron from an acidic solution containing titanium-iron polymetallic chlorides. Background technique [0002] Titanium ore reserves are large and widely distributed around the world. At present, about 90% of the titanium ore mined each year is used to produce titanium dioxide. Titanium dioxide has high chemical stability, good whiteness, tinting power and hiding power. It is the most important white pigment and also a titanium-based product. The most important product. Titanium dioxide accounts for 80% of the total white pigment usage, and is widely used in many fields of modern industry and agriculture, national defense, and science and technology. [0003] The main production processes of titanium dioxide in industry are sulfuric acid method and chlorination meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B3/28C22B3/32C22B7/00C21B15/00
CPCC21B15/00C22B7/006C22B34/1259C22B3/288C22B3/32Y02P10/20
Inventor 魏琦峰朱珂瑀任秀莲
Owner HARBIN INST OF TECH AT WEIHAI
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