Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method and system for preparing U3O8

A technology of hydrolysis reaction and powder, which is applied in the field of nuclear chemical industry, can solve the problems that cannot meet the requirements of high efficiency, energy saving, economy and environmental protection, the number of equipment sets is large, and the processing cost is high. It has broad practical value, short process flow and simple system structure. Effect

Active Publication Date: 2021-09-03
CHINA NUCLEAR POWER ENG CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Due to the long process of the ADU wet production process, the number of equipment sets is large, and the investment is large. At the same time, a large amount of radioactive waste will inevitably be generated during the production process, which is difficult to handle and high in processing costs. It cannot meet the requirements of high efficiency, energy saving, economy and Environmental requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for preparing U3O8
  • Method and system for preparing U3O8
  • Method and system for preparing U3O8

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment discloses a kind of preparation U 3 o 8 methods, including: UF 6 As the raw material, the UF 6 After heating and gasification, the hydrolysis reaction is carried out first to obtain the hydrolysis product UO 2 f 2 powder, then the hydrolyzate UO 2 f 2 The powder undergoes defluorination reduction reaction to generate U 3 o 8 , and its chemical reaction formula is as follows:

[0062] (1) Hydrolysis reaction:

[0063] UF 6 (g)+2H 2 O(g)→UO 2 f 2 (s)+4HF(g)

[0064] (2) Defluorination reduction reaction:

[0065] 6UO 2 f 2 (s)+6H 2 O(g)→2U 3 o 8 (s)+12HF(g)+O 2 (g)

[0066] This embodiment also discloses a method for preparing U 3 o 8 system, such as figure 1 As shown, it includes a raw material container 1, a heating device 2, and a converter 4, wherein: the raw material container 1 is used to hold UF 6 raw material; the heating device 2 is used for the UF in the raw material container 1 6 The raw material is heated so that the U...

Embodiment 2

[0069] Such as figure 1 Shown, this embodiment discloses a kind of preparation U 3 o 8 method, including the following steps:

[0070] S1, the UF 6 After the raw material is heated to gasification, it is passed into the hydrolysis reaction chamber 41, and the first water vapor is passed into, so that the UF 6 The gas undergoes a hydrolysis reaction with the first water vapor to obtain the hydrolysis product UO 2 f 2 powder.

[0071] Specifically, after applying the UF 6 The raw material is heated to gasification and becomes UF 6 After the gas, it is preferred to start with the UF 6 The gas is further heated, and at the same time, the first water vapor is heated to make UF 6 Both gas and the first water vapor reach the hydrolysis reaction temperature, and then pass into the hydrolysis reaction chamber 41 simultaneously, wherein, UF 6 The mass ratio of gas to the first water vapor is (2.5-4):1, preferably 3:1, so that UF 6 After the gas and the first water vapor are c...

Embodiment 3

[0079] Such as figure 1 Shown, this embodiment discloses a kind of preparation U 3 o 8 system, including a raw material container 1, a heating device 2, and a converter 4, wherein: the raw material container 1 is used to hold UF 6 Raw materials; the heating device 2 is used to heat the raw material container 1, so that the UF in the raw material container 1 6 Gasification of raw materials to obtain UF 6 Gas; Converter 4 comprises hydrolysis reaction chamber 41 and reduction reaction chamber 42, is provided with the first steam pipeline 26 on the hydrolysis reaction chamber 41, to pass into the first steam, hydrolysis reaction chamber 41 is connected with raw material container 1 by feed pipeline, for receiving UF 6 gas and make it hydrolyze with the first hydrolysis steam to obtain the hydrolysis product UO 2 f 2 powder, the reduction reaction chamber 42 is provided with a second steam line 16 to feed the second steam, and the reduction reaction chamber 42 is connected w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing U3O8. The method comprises the following steps: by taking UF6 as a raw material, heating and gasifying the UF6, then carrying out hydrolysis reaction, and then carrying out defluorination reduction reaction on the hydrolysate UO2F2 powder to generate the U3O8. The invention further discloses a system for preparing U3O8. The system comprises a raw material container, a heating device and a converter, wherein the raw material container is used for containing UF6 raw materials, the heating device is used for heating the raw material container to obtain UF6 gas, the converter comprises a hydrolysis reaction chamber and a reduction reaction chamber, the hydrolysis reaction chamber is provided with a first steam pipeline for introducing first steam, the hydrolysis reaction chamber is connected with the heating device and used for receiving UF6 gas and enabling the UF6 gas to be subjected to hydrolysis reaction with first hydrolysis steam to obtain UO2F2 powder, the reduction reaction chamber is provided with a second steam pipeline for introducing second steam, and the reduction reaction chamber is connected with the hydrolysis reaction chamber and is used for receiving the UO2F2 powder and enabling the UO2F2 powder and second water vapor to be subjected to defluorination reduction reaction to generate U3O8. The method and system provided by the invention can realize dry conversion of UF6 into U3O8, and have the advantages of simple process, low cost and high productivity.

Description

technical field [0001] The invention belongs to the technical field of nuclear chemical industry, in particular to a method for preparing U 3 o 8 methods and systems. Background technique [0002] With the comprehensive development and deepening of my country's military-civilian integration strategy, the U 3 o 8 Powder, especially for high enrichment U 3 o 8 Powders are in increasing demand. Currently, domestic U 3 o 8 The powder is mainly produced by ADU (ammonium diuranate) wet production process, which is based on UF 6 As a raw material, U 3 o 8 Powder, its main reaction process is as follows: [0003] (1)UF 6 hydrolysis: [0004] UF 6 +2H 2 O→UO 2 f 2 +4HF [0005] (2) ADU precipitation: [0006] 2UO 2 f 2 +6NH 3 ·H 2 O→(NH 4 ) 2 u 2 o 7 ↓+4NH 4 F+3H 2 o [0007] (3) Calcination defluorination: [0008] 9(NH 4 ) 2 u 2 o 7 →6U 3 o 8 +14NH 3 ↑+2N 2 ↑+15H 2 o [0009] Due to the long process of the ADU wet production process, the num...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G43/01
CPCC01G43/01Y02E30/30
Inventor 李明江保军何广昌李国辉黄相振童晓东郑亚娟李冠华张超侯超范志东李超张立维孙曙光张飞翔
Owner CHINA NUCLEAR POWER ENG CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com