Terbium oxide extraction process for treating ion ore through combination of hydrochloric acid and organic extraction agent
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An organic extraction agent, terbium oxide technology, applied in the field of terbium oxide extraction process, can solve economic and technical difficulties and other problems
Inactive Publication Date: 2021-09-07
中稀(常州)稀土新材料有限公司
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[0004] The purpose of the present invention is to provide a kind of hydrochloric acid and organic extraction agent to combine and process the terbium oxide extraction process of ion ore, solve the problem of using nitric acid method in the prior art to decompose ion ore and then produce phosphoric acid, and then through processes such as neutralization precipitation and extraction. Rare earth is precipitated, and there is a problem of co-precipitation in the neutralization precipitation, which still needs further purification, which has certain difficulties in terms of economy and technology
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Embodiment 1
[0022] The rare earth terbium oxide extraction process includes the following steps:
[0023] The first step is to combine the organic extractant with hydrochloric acid. Firstly, the phosphoric acid prepared by the wet process of hydrochloric acid containing rare earth ion minerals is used as raw material, and at least one of ketone, ether, alcohol, and lipid organic solvents is used for extraction to obtain refined phosphoric acid and raffinate of rare earths, and then extract enrichment of rare earths from raffinate;
[0024] In the second step, the rare earth elements in the raffinate are extracted with an organic extract to obtain an organic phase loaded with rare earth and a secondary raffinate;
[0025] In the third step, the rare earth-loaded organic phase is washed with acid and stripped to obtain a rare earth stripping solution and a blank organic phase;
[0026] The fourth step is to adjust the pH value of the obtained rare earth back-extraction liquid, obtain solid...
Embodiment 2
[0028] When the aqueous solution in the associated rare earth ion ore is made use of hydrochloric acid by the neutralization precipitation method, wherein the acid solution is defluorinated, frozen crystallized, decalcified and neutralized and precipitated, the rare earth terbium oxide is 1.4% neutralized slag, and the rare earth recovery rate exceeds 85%, and then the neutralized slag is roasted with sodium carbonate, soaked in water and acid soaked to remove impurities and enrich rare earths. At this time, an acidolysis slag with a mass fraction of rare earth terbium oxide of 10.16% will be obtained, and the recovery rate of rare earths will reach 74.8%.
Embodiment 3
[0030] Wet process phosphoric acid mainly uses hydrochloric acid to decompose ion ore to produce phosphoric acid. During the treatment process, part of the rare earth enters the phosphoric acid solution, and the other part of the rare earth enters the phosphogypsum. Due to different leaching conditions, the classification and comparison are not the same, so There are two methods for recovering rare earths in wet-process phosphoric acid prepared by hydrochloric acid method: one is to recover rare earths from phosphoric acid, and the other is to recover rare earths from gypsum.
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Abstract
The invention relates to the technical field of rare earth extraction, in particular to a terbium oxide extraction process for treating ion ore through combination of hydrochloric acid and an organic extraction agent, and solves the technical problems that in the prior art, a nitric acid method is adopted for decomposing the ion ore to produce phosphoric acid, and then rare earth is separated out through neutralization precipitation, extraction and other processes; and the problem of co-precipitation exists in neutralization precipitation, and certain difficulties exist in both the economic aspect and the technical aspect. The terbium oxide extraction process for treating ion ore through combination of hydrochloric acid and an organic extraction agent comprises the following steps: producing phosphoric acid by decomposing the ion ore with hydrochloric acid when wet-process phosphoric acid is adopted, and feeding one part of rare earth into a phosphoric acid solution and the other part of rare earth into phosphogypsum in the treatment process. According to the mode provided by the invention, the continuous degree of extraction is relatively high, the recovery rate and the purity are obviously improved, meanwhile, the process for extracting the rare earth from the phosphoric acid is simple, and particularly, the continuous extraction method is high in continuous degree and easy to realize industrial production.
Description
technical field [0001] The invention relates to the technical field of rare earth extraction, in particular to a terbium oxide extraction process for treating ion ores in combination with hydrochloric acid and an organic extractant. Background technique [0002] Ion ore is a mineral with high phosphorus content, which contains a large amount of phosphoric acid. Phosphoric acid is a relatively common inorganic acid and can be a medium-strong acid. Phosphoric acid can also be used as a chemical reagent. Among them, ion ore is commonly used Contains high-value rare earth elements, so it is of great significance to economically and rationally recover the rare earth elements in the phosphoric acid refining process. [0003] In the prior art, the nitric acid method is generally used to decompose the ion ore to produce phosphoric acid, and then the rare earth is precipitated through neutralization precipitation and extraction. , Still need to be further purified, both economically...
Claims
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