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Method for extracting technetium from molybdenum solution adopting polyamide resin

A technology using polyamide and polyamide resin, which is applied in the field of radionuclide separation, can solve problems such as poor radiation resistance, poor consistency of chromatographic columns, and complex material structure, and achieve stable adsorption and separation performance and good radiation resistance , low price and easy to obtain effect

Active Publication Date: 2017-07-21
HTA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ABEC-2000 also has some disadvantages, such as its poor radiation resistance, complex material structure, and poor consistency of chromatographic columns made of it.

Method used

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  • Method for extracting technetium from molybdenum solution adopting polyamide resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Slowly add 50mL of 6mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 4.6 mol / L. Use 3g of 200 mesh PA6 to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereon. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained eluent is a solution containing techne...

Embodiment 2

[0049] Slowly add 50mL of 6mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 4.6 mol / L. Use 3g of 200 mesh PA66 to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 20 mL of 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereto. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained eluent is a solution contain...

Embodiment 3

[0051] Slowly add 50mL of 4mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 2.6 mol / L. Mix 1g of 200-mesh PA46 and 2g of 200-mesh PA66 to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 20 mL of 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereto. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained elue...

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Abstract

The invention belongs to the field of radioactive elements separation, and particularly relates to a method for extracting technetium from a molybdenum solution adopting polyamide resin. The method comprises the following steps: (1) preparing a molybdenum and technetium mixed solution with the concentration of hydroxide ions being greater than or equal to 1 mol / L; (2) adsorbing technetium in the molybdenum and technetium mixed solution obtained in the step (1) by adopting polyamide resin; (3) adopting a scrubbing solution for cleaning so as to remove a small amount of molybdenum adhered on the surface of polyamide resin; (4) desorbing technetium adsorbed on the surface of polyamide resin by adopting a leacheate with the concentration of hydroxide ions being smaller than 1 mol / L. The method for extracting technetium from the molybdenum solution adopting polyamide resin has the characteristics that the radiation resistance of a solid-phase separation material is good, the adsorption separation performance is stable, and the solid-phase separation material is low in cost and easy to obtain.

Description

technical field [0001] The invention belongs to the field of separation of radionuclides, and in particular relates to a method for extracting technetium from molybdenum solution by using polyamide resin. Background technique [0002] 99m Tc has become one of the most commonly used radionuclides in nuclear medicine because of its relatively pure low-energy γ-rays (141keV) and short half-life (6.03h). Currently, 99m Tc mainly through 99 Mo / 99m Obtained by Tc chromatographic generator. In the generator, the parent nuclide 99 Mo decays to 99m The efficiency of Tc is 88.6%, and the remaining 11.4% decays directly to 99 Tc. this kind 99 Mo / 99m Tc generator, which can convert daughter nuclides 99m Tc(T 1 / 2 = 6h) from the parent nuclide 99Mo (T 1 / 2 =66.7h) extracted. In this way, short-lived radionuclides can be provided to areas far from nuclear facilities through long-distance transportation 99m Tc, and can do daily shower 99m Tc, like milking a cow. therefore...

Claims

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Application Information

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IPC IPC(8): C22B3/24C22B61/00
CPCC22B3/24C22B61/00Y02P10/20
Inventor 阳国桂胡骥罗联哲卿晶
Owner HTA CO LTD
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