A sort of 210 Po purification methods

By combining high-temperature distillation, nitric acid and hydrochloric acid treatment with chloride-type anion exchange resin, the problem of efficiently purifying 210Po from irradiated thorium oxide targets was solved, achieving the separation of high-purity 210Po and simplifying the operation, thus meeting the needs of radioactive instrument preparation.

CN117867279BActive Publication Date: 2026-07-14CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Filing Date
2023-12-28
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies make it difficult to efficiently purify 210Po from irradiated thorium oxide targets, and 210Po has a short half-life, making it unsuitable for long-term storage and affecting the calibration and measurement accuracy of radioactive instruments.

Method used

210Po was separated and purified from irradiated thorium oxide target by means of high-temperature distillation, treatment with nitric acid and hydrochloric acid, and purification with chloride anion exchange resin. The separation was carried out by taking advantage of the difference in complexation between 210Po and impurity elements in hydrochloric acid solution.

Benefits of technology

The purification of high-purity 210Po was achieved, simplifying the operation process, improving production efficiency, meeting the preparation requirements of radioactive instruments, and ensuring the accuracy of measurements.

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Abstract

This invention provides a 210 The purification method for Po includes: under vacuum, distilling irradiation of a thorium oxide target to generate distilled gas, condensing the distilled gas in a collecting pan to obtain a distillate; soaking the collecting pan in nitric acid solution to obtain a soaking solution, evaporating it to obtain a dried product, dissolving the dried product in hydrochloric acid solution to obtain a leachate; pouring the leachate into a chromatography column packed with chloride-form anion exchange resin, rinsing the chromatography column with hydrochloric acid solution, and draining the liquid; rinsing the chromatography column with hydrochloric acid solution to allow the chloride-form anion exchange resin to react with the thorium oxide. 210 Po separation yields a product containing... 210 The purified solution of Po was diluted to obtain a diluent. Tetravalent tellurium, a reducing agent, and isopropanol were added to the diluent to obtain a mixture. The mixture was filtered to obtain an α-measurement source, and the α-spectrum was obtained by measurement. The purification method of this embodiment utilizes a thorium oxide target obtained after irradiation. 210 The differences in physicochemical properties between Po and impurities enable... 210 Purification of Po.
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