The method of separation of scandium from titanium

 

(57) Abstract:

The invention relates to hydrometallurgy rare metals and can be used in the technology of extraction of scandium from waste products of titanium and zirconium when cleaning scandium concentrates from titanium. The technical result of the invention is to increase the odds of separation of metals. To do this in a hydrochloric acid solution containing titanium and scandium, add hydrogen peroxide in a weight ratio with the concentration of the titanium solution is neutralized, after which the extraction is carried out with 0.25 mol/l solution of N-(2-hydroxy-5-nonylbenzene)-, -dihydroxyethylene (NBAA) in octanol for 30 min at pH of 2.25 is-3.45. The proposed method allows to increase the coefficient of separation of metals from 450 to 26440.

The invention relates to hydrometallurgy rare metals and can be used in the technology of extraction of scandium from waste products of titanium and zirconium when cleaning scandium concentrates from titanium.

The known method of separation of scandium from titanium, including extraction from weakly acidic aqueous solutions of diethyl ether in the presence of ammonium thiocyanate [Fischer, Side. Obtaining pure compounds of scandium. In Proc. of: Scandium. M the bedroom with the need to develop solutions to 7 mol/l ammonium thiocyanate (in the absence of ammonium thiocyanate, the degree of extraction of scandium <3%), as well as high fire hazard (flash point diethyl ether - 40oC).

Closest to the present invention is a method of separation of scandium from titanium with the introduction of the system of hydrogen peroxide in the mass ratio of the concentration of titanium of 0.4-11 from weakly acidic solutions at pH 1.8 to 4.1 extraction solution alkylmethacrylamide oligomer brand NRS in toluene of acid sulfate environments within 2 h [RF patent 2162898, MKI 22 In 59/00, 30.06.1999].

The disadvantage of this method is that, although the use of hydrogen peroxide, the rate of separation of metals increases (=450), but this is not sufficient for effective cleaning of scandium from titanium.

The technical result of the invention is to increase the partition coefficients of metals.

This technical result is achieved by the proposed method of separation of scandium from titanium, which consists in the fact that hydrochloric acid solution containing titanium and scandium, add hydrogen peroxide in the mass ratio of the concentration of titanium , the solution is neutralized, after which the extraction is carried out with 0.25 mol/l solution of N-(2-hydroxy-5-nonylbenzene)-,-dihydroxyethylene (NBAA) in octanoic a solution of N-(2-hydroxy-5-nonylbenzene)-,-dihydroxyethylene (NBAA) in octanol.

At pH values<2,0 deteriorating extraction of titanium and decreases the coefficient of separation of metals.

At pH values>3.9 scandium precipitates and the process of separating metals disturbed.

When the ratio is smaller than 0.8 in the sediment falls titanium and the process of separation of metals is also impaired.

The increase in the concentration of hydrogen peroxide is greater than, is irrational, because it does not improve separation of scandium from titanium.

Examples illustrating the invention.

Example 1. In hydrochloric acid solution containing 1.13 g/l titanium 1,00 g/l scandium, add hydrogen peroxide to a concentration of 5.50 g/l, the solution is neutralized, after which the extraction is carried out with 0.25 mol/l solution of N-(2-hydroxy-5-nonylbenzene)-,-dihydroxyethylene (NBAA) in octanol within 30 minutes After separation of the phases pH of 2.25, the degree of extraction of titanium ETi=98,86%, the separation factor =17576.

Example 2. In the original solution, as in example 1, introducing hydrogen peroxide to a concentration of 5.50 g/l, the solution is neutralized and the extraction is carried out as in example 1, the pH 2,41, ETi=99,28%, =19378.

Example 3. In the original solution is injected hydrogen peroxide to the solution to neutralize and hold W ill result peroxide of hydrogen to , the solution is neutralized and the extraction is carried out as described above, the pH is 3.21, ETi=99.75 per cent =20244.

Example 5. In the original solution is injected hydrogen peroxide to the solution is neutralized and the extraction is carried out as described above, the pH of 3.45, ETi=99,77%, =10078.

Thus, comparing the known method and offered by us can be seen that using the proposed method improves the coefficient of separation of metals from 450 to 26440.

The method of separation of scandium from titanium, which includes adding to the original hydrogen peroxide solution in a mass ratio to the concentration of titanium is equal to 0.8-10, and extraction from a solution at pH of 2.25-3,45, characterized in that the extraction was carried out with a solution of N-(2-hydroxy-5-nonylbenzene)-, -dihydroxyethylene (NBAA) in octanol.

 

Same patents:

The invention relates to the extraction and selective extraction of metal components, such as uranium, thorium, scandium and zirconium, from the source material, which consists of these components
The invention relates to ferrous metallurgy, namely the recovery of valuable components of scandium from the intermediate products of the refining of bauxite to alumina - specialnyh dust precipitator or red mud

The invention relates to a process for the recovery of scandium from solution and can be used for selective extraction of scandium from waste aluminum (red mud), titanium (waste melts), zirconium, tin, tungsten, uranium
The invention relates to integrated technologies eudialyte concentrate and can be used to obtain compounds of zirconium, rare earth elements (REE), aluminum and manganese

The invention relates to a method for extracting rare earth metals from their fluoride to obtain alloys comprising preparing a mixture of fluorides, aluminum powder, metal calcium and supplements, initiation metallothermic response to receiving the molten metal and slag phases, cooling, unloading and separation of the ingot from slag

The invention relates to ferrous metallurgy, in particular, to the extraction and concentration of scandium from multicomponent solutions for the processing of various industrial raw materials, mainly unprocessed red mud from alumina production, waste melts titanium chlorinators, waste mother solutions of zirconium production
The invention relates to hydrometallurgical processing ore concentrates, and more particularly to the processing of loparite concentrate

The invention relates to metallurgy

The invention relates to the field of metallurgy, production of refractory materials - carbides of titanium

The invention relates to ferrous metallurgy, in particular to technology and devices to enrich titanium containing materials
The invention relates to ferrous metallurgy, in particular to methods of producing sponge titanium magnesium recovery of titanium tetrachloride
The invention relates to the hydrometallurgical processing of technoeconomically concentrates, and more particularly to the opening of loparite concentrate
The invention relates to ferrous metallurgy, in particular to methods of producing sponge titanium recovery of titanium tetrachloride with magnesium and how clean it vacuumforming separation
The invention relates to ferrous metallurgy, in particular to methods of producing titanium magnesium recovery of titanium tetrachloride

The invention relates to the processing of red mud
The invention relates to the field of metallurgy and chemical technology of inorganic substances and can be used in the metallurgical and chemical-metallurgical profile, such as titanium-magnesium plants for the extraction of vanadium
The invention relates to a method for integrated processing of anthropogenic vanadium raw materials, including chlorination in molten chlorides of the metals with the formation of the vapor-gas mixture and the spent molten salt chlorinators, condensation of chlorides of vanadium, titanium and silicon, distillation and chemical separation and purification, recycling of titanium tetrachloride and silicon, hydrolysis of oxytrichloride vanadium emitting precipitation of metavanadate ammonium and/or vanadium pentoxide, niobium, Department of precipitation from the mother solution, washing, drying and/or calcining to produce commodity of vanadium compounds
Up!