A kind of cationic resin is the noble metal catalyst of carrier and its preparation and application

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, no safety hazards, and improved energy efficiency

Active Publication Date: 2022-06-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of cationic resin is the noble metal catalyst of carrier and its preparation and application
  • A kind of cationic resin is the noble metal catalyst of carrier and its preparation and application

Examples

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preparation example Construction

[0035] A kind of cation resin as above is the preparation method of the precious metal catalyst of carrier, comprises the steps:

[0036] 1) take the cation exchange resin that the quality is M1, add the saturated sodium chloride solution that the volume is L1 and soak for three days, thereby removing the organic small molecule compound in the resin;

[0037] Filter, transfer the filtered cation resin to deionized water, and repeatedly wash with deionized water until the chloride ion concentration is not more than 100ppm, so as to avoid its residue and poisoning the catalyst;

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

[0039] Filter, transfer the filtered cationic resin to deionized water, and wash repeated...

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 repeatedly wash until the chloride ion concentration is not more than 100ppm; use 0.1mol / 100mL of nitric acid solution of L was soaked for two days, then rinsed three times with 50mL of 1.8mol / L nitric acid, filtered, and the filtered cationic resin carrier was directly transferred to deionized water, and washed repeatedly until pH test paper was checked to neutrality; The 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 soaked and adsorbed at room temperature for 12h, and then 80mL containing 3.0g NaBH was added dropwise in an ice bath 4 The resulting solution was stirred for 3 hours, filtered and washed repeatedly until the chloride ion concentration was no more t...

Embodiment 2

[0072] Take 15g 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 repeatedly wash until the chloride ion concentration is not more than 100ppm; use 0.3mol / 100mL of nitric acid solution of L was soaked for two days, then rinsed three times with 50mL of 2.3mol / L nitric acid, filtered, and the filtered cation resin carrier was directly transferred to deionized water, and washed repeatedly until the pH test paper was checked to neutrality; The 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 soaked and adsorbed at room temperature for 12h, and then 80mL containing 1.5g NaBH was added dropwise in an ice bath 4 The solution was continuously stirred for 3h, filtered and washed repeatedly until the chloride ion concentration was no more than...

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Abstract

The invention belongs to the technical field of nuclear power waste treatment and environmental protection, and specifically relates to a precious metal catalyst with ZSM-5 as a carrier, a preparation method and application thereof. The object of the present invention is to provide a cationic resin-carrier 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. A noble metal catalyst with a cationic resin as a carrier, the catalyst carrier is a cationic exchange resin, the active component is metal ruthenium, and the mass fraction of the active component in the catalyst is 3% to 10%. The invention adopts catalytic decomposition to remove dangerous compounds such as hydrazine nitrate and hydroxylamine nitrate in the nitric acid waste liquid. Compared with the traditional way of adding oxidant, the method is cleaner, more environmentally friendly, has no potential safety hazard, and is more economical than the way of adding oxidant.

Description

technical field [0001] The invention belongs to the technical field of nuclear power waste treatment and environmental protection, and in particular relates to a precious metal catalyst with a cation 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, which is one of the most realistic and feasible technical methods 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 the spent fuel contains a large amount of unconverted uranium and value-added nuclides, which is an important nuclear element resource pool. Major nuclear power countries, including China, mostly adopt ...

Claims

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Application Information

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Patent Type & Authority Patents(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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