SU559902A1 - Method of tantalum concentration - Google Patents
Method of tantalum concentrationInfo
- Publication number
- SU559902A1 SU559902A1 SU2029501A SU2029501A SU559902A1 SU 559902 A1 SU559902 A1 SU 559902A1 SU 2029501 A SU2029501 A SU 2029501A SU 2029501 A SU2029501 A SU 2029501A SU 559902 A1 SU559902 A1 SU 559902A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- tantalum
- concentration
- extraction
- solutions
- acid
- Prior art date
Links
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- Manufacture And Refinement Of Metals (AREA)
Description
II
Изобретение относитс к области аналитической химии, радиохимии и другим област м, где возникает потребность максимального и селективного концентрировани тантала из больших объемов водных растворов.The invention relates to the field of analytical chemistry, radiochemistry and other areas where the need arises for the maximum and selective concentration of tantalum from large volumes of aqueous solutions.
Известна экстракци ниоби и тантала триоктиламином из растворов плавиковой кислоты в толуол или дихлорэтан. Извлекаютс соединени состава (КН)НТаР7 и (КН)НЫЬ(ОН)бРб.The extraction of niobium and tantalum with trioctylamine from solutions of hydrofluoric acid to toluene or dichloroethane is known. Compounds of the composition (KH) NTaP7 and (KH) HYB (OH) brb are recovered.
Известна экстракци ниоби и тантала растворами триоктиламина и другими аминами в хлороформ из растворов минеральных кислот, содержащих 0,2 моль/л плавиковой кислоты.The extraction of niobium and tantalum by solutions of trioctylamine and other amines into chloroform from mineral acid solutions containing 0.2 mol / l of hydrofluoric acid is known.
Коэффициент распределени тантала 10- 50 и снижаетс при замене серной кислоты на сол ную кислоту или азотную.The distribution coefficient of tantalum is 10-50 and decreases when replacing sulfuric acid with hydrochloric acid or nitric acid.
Недостатками известных способов вл ютс низка степень концентрировани и невозможность проведени процесса из больших объемов водных растворов.The disadvantages of the known methods are the low degree of concentration and the impossibility of carrying out the process from large volumes of aqueous solutions.
Ближайшим к изобретению по технической сущности и достигаемому эффекту вл етс способ выделени фторидного ацидокомплекса тантала с диантипирилметаном. Основной недостаток известного метода - низка степень концентрировани .The closest to the invention to the technical essence and the achieved effect is the method of separation of the fluoride acid complex of tantalum with diantipyrylmethane. The main disadvantage of the known method is the low degree of concentration.
Целью изобретени вл етс повышение селективности и степени концентрировани тантала .The aim of the invention is to increase the selectivity and concentration of tantalum.
Это достигаетс совокупным изменением состава водной фазы, растворител и заменой реагента по сравнению с прототипом. Дл этого тантал извлекают из фторидных растворов октилдиантипирилметаном с использованием смеси хлороформа с непол рным растворителем , например керосином. Экстракцию провод т из растворов с кислотностью 2- 3 н. по фтористоводородной кислоте и 4- 6 н. по серной кислоте.This is achieved by cumulatively changing the composition of the aqueous phase, the solvent, and replacing the reagent as compared with the prototype. To do this, tantalum is extracted from fluoride solutions with octyl dianthipyrylmethane using chloroform and a non-polar solvent, for example, kerosene. The extraction is carried out from solutions with an acidity of 2-3 n. hydrofluoric acid and 4-6 n. on sulfuric acid.
В качестве экстракционной системы используют фторидную, поскольку в ней в отличие от хлоридной, бромидной, иодидной, роданидной систем достигнуть наибольшей селективности концентрировани элемента. Кроме того, из перечисленных систем тантал практически не извлекаетс диантипирилметанами вследствие его гидролиза. Дл вы снени общих закономерностей экстракции тантала изучено вли ние кислотности среды, концентрации фторид-ионов и реагентов на распределение тантала в двухфазной системе При увеличении концентрации фторид-ионов экстракци тантала заметно падает за счет образовани высокозар дных неизвлекающихс комплексных форм тантала. Серна кислота способствует извлечению элемента, а азотFluoride is used as an extraction system, since, in contrast to the chloride, bromide, iodide, and rhodanide systems, it achieves the highest selectivity of element concentration. In addition, among these systems, tantalum is practically not extracted by diantipyrylmethanes due to its hydrolysis. To clarify the general laws of tantalum extraction, we studied the effect of medium acidity, fluoride ion concentrations and reagents on the distribution of tantalum in a two-phase system. When the concentration of fluoride ions increases, tantalum extraction decreases significantly due to the formation of highly complex tantalum that cannot be removed. Sulfuric acid helps to remove the element, and nitrogen
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2029501A SU559902A1 (en) | 1974-05-28 | 1974-05-28 | Method of tantalum concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2029501A SU559902A1 (en) | 1974-05-28 | 1974-05-28 | Method of tantalum concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU559902A1 true SU559902A1 (en) | 1977-05-30 |
Family
ID=20586298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2029501A SU559902A1 (en) | 1974-05-28 | 1974-05-28 | Method of tantalum concentration |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU559902A1 (en) |
-
1974
- 1974-05-28 SU SU2029501A patent/SU559902A1/en active
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