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Noble metal catalyst taking cationic resin as carrier, preparation and application thereof

A precious metal catalyst, cation resin technology, applied in catalyst activation/preparation, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., can solve problems such as removal of hydrazine nitrate and hydroxylamine nitrate, and achieve Mild reaction conditions, excellent economy, and the effect of improving energy efficiency

Active Publication Date: 2021-06-29
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a cationic resin as a carrier of noble metal catalyst and its preparation and application, so as to solve the problem of safe removal of hydrazine nitrate and hydroxylamine nitrate in the existing spent fuel reprocessing waste liquid

Method used

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  • Noble metal catalyst taking cationic resin as carrier, preparation and application thereof
  • Noble metal catalyst taking cationic resin as carrier, preparation and application thereof

Examples

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preparation example Construction

[0035] A kind of cationic resin as described above is the preparation method of the noble metal catalyst of support, comprises the steps:

[0036] 1) Get a cation exchange resin with a quality of M1, add a saturated sodium chloride solution with a volume of L1 and soak it for three days, thereby removing small organic molecules in the resin;

[0037] Filtration, the filtered cationic resin is transferred to deionized water, and repeatedly washed with deionized water until the chloride ion concentration is not greater than 100ppm, so as to avoid its residue and poison the catalyst;

[0038] 2) Soak the resin obtained in step 1) with a nitric acid solution with a volume of L1 and a concentration of 0.1 to 0.3 mol / L for two days, and then rinse it with nitric acid with a volume of 0.5 L1 and a concentration of 1.8 to 2.3 mol / L for three times, Thereby removing the metal ion impurities in the resin;

[0039] Filtration, the filtered cationic resin is transferred to deionized wate...

Embodiment 1

[0067] Take 15g of cation exchange resin carrier, add 100mL saturated sodium chloride solution to soak for three days, filter, transfer the filtered cation resin carrier directly to deionized water, and wash repeatedly until the chloride ion concentration is not greater than 100ppm; use 0.1mol / Soak in 100mL of nitric acid solution of 1 L for two days, then rinse three times with 50mL of 1.8mol / L nitric acid, filter, and transfer the filtered cationic resin carrier directly to deionized water, and wash repeatedly until the pH test paper is neutral; A good cation exchange resin was dispersed in 100mL deionized water, and 30mL containing 1.94g RuCl was added dropwise 3 ·3H 2 O solution, the above solution was impregnated and adsorbed at room temperature for 12h, and then 80mL containing 3.0g NaBH was added dropwise in an ice bath 4 solution and continued to stir for 3 hours, filtered and washed repeatedly until the concentration of chloride ions was not greater than 100ppm, and...

Embodiment 2

[0072] Take 15g of cation exchange resin carrier, add 100mL saturated sodium chloride solution to soak for three days, filter, transfer the filtered cation resin carrier directly to deionized water, and wash repeatedly until the chloride ion concentration is not greater than 100ppm; use 0.3mol / Soak in 100mL of nitric acid solution of 1 L for two days, then rinse three times with 50mL of 2.3mol / L nitric acid, filter, and transfer the filtered cationic resin carrier directly to deionized water, and wash repeatedly until the pH test paper is tested to be neutral; A good cation exchange resin was dispersed in 100mL deionized water, and 30mL containing 1.94g RuCl was added dropwise 3 ·3H 2 O solution, the above solution was impregnated and adsorbed at room temperature for 12h, and then 80mL containing 1.5g NaBH was added dropwise in an ice bath 4 solution and continued to stir for 3 hours, filtered and washed repeatedly until the chloride ion concentration was not greater than 10...

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Abstract

The invention belongs to the technical field of nuclear power waste treatment and environmental protection, particularly relates to a noble metal catalyst taking ZSM-5 as a carrier, a preparation method and application thereof, and aims to provide a noble metal catalyst taking cationic resin as a carrier, preparation and application thereof so as to solve the problem of safe removal of hydrazine nitrate and hydroxylamine nitrate in existing spent fuel post-treatment waste liquid. According to the noble metal catalyst with the cationic resin as the carrier, the carrier of the catalyst is cation exchange resin, the active component of the catalyst is metal ruthenium, and the mass fraction of the active component in the catalyst is 3-10%. According to the invention, dangerous compounds such as hydrazine nitrate, hydroxylamine nitrate and the like in a nitric acid waste liquid are removed in a catalytic decomposition mode, and compared with a traditional oxidizing agent adding mode, the method is cleaner, more environmentally friendly and free of potential safety hazards, and the economical efficiency is better than that of the oxidizing agent adding mode.

Description

technical field [0001] The invention belongs to the technical field of nuclear power waste management and environmental protection, and in particular relates to a noble metal catalyst with a cationic resin as a carrier and its preparation and application. Background technique [0002] Nuclear power is a green, low-carbon and clean energy with mature technology, and it is one of the most practical and feasible technical ways for human beings to solve energy problems. However, nuclear power produces a large amount of highly radioactive waste—spent fuel, and its safety is one of the main factors restricting the large-scale promotion and application of nuclear power. [0003] As we all know, the nuclear fuel utilization rate of nuclear power reactors is not high at present, and spent fuel contains a large amount of unconverted uranium and value-added nuclides, which are important nuclear element resource pools. Major nuclear power countries, including China, mostly adopt nuclear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J37/30B01J37/02B01J37/16C02F1/70C02F101/16
CPCB01J31/28B01J37/30B01J37/0201B01J37/16C02F1/705C02F2101/163
Inventor 李保乐左臣郑卫芳晏太红朱浩玮白杨
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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