Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for selectively recovering americium from an aqueous nitric phase

一种水相中、选择性的技术，应用在回收利用技术、化学仪器和方法、放射性净化等方向，能够解决情形复杂等问题

Active Publication Date: 2012-05-23
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
View PDF11 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this method has the advantage of being able to handle strong acid solutions, it requires a downstream extraction cycle with other organic solutions in order to finally obtain an aqueous solution containing only americium and curium, which complicates the whole situation

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 for selectively recovering americium from an aqueous nitric phase
  • Method for selectively recovering americium from an aqueous nitric phase
  • Method for selectively recovering americium from an aqueous nitric phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Example 1: Detailed Discussion of a First Exemplary Embodiment of the Method of the Invention

[0134] refer to figure 1 , which schematically illustrates a first exemplary embodiment of the invention, is designed to process on an industrial scale originating from PUREX or COEX TM The raffinate of the first purification cycle of the process, with the aim of selectively recovering the americium present in this raffinate.

[0135] The latter (the above raffinate), below and figure 1 Indicated by the A1 aqueous phase, is an aqueous solution with strong nitric acidity containing americium, curium, lanthanides (La, Ce, Pr, Nd, Sm, Eu, Gd, ...), different from lanthanides fission products (Mo, Zr, Ru, Rd, Pa, Y, ...) and other metal elements such as iron and chromium that are neither lanthanides nor fission products.

[0136] On the other hand, it does not contain uranium, plutonium and neptunium, or if any of these elements are present, it is only present in trace amounts...

Embodiment 2

[0168] Example 2: Detailed Discussion of a Second Exemplary Embodiment of the Method of the Invention

[0169] now refer to figure 2 , which schematically shows a second exemplary embodiment of the method of the present invention, which is also designed for processing on an industrial scale originating from PUREX or COEX TM The raffinate of the first purification cycle of the process, with the aim of selectively recovering the americium present in this raffinate, but wherein an acid extractant is present in the organic phase of all steps of the process.

[0170] Also, in this second embodiment, each cycle of the method includes the following six steps:

[0171] 1) extracting americium and a part of lanthanides present in the A1 aqueous phase by utilizing an organic phase containing both a solvating extractant and an acid extractant;

[0172] 2) washing the organic phase resulting from this extraction;

[0173] 3) selective stripping of molybdenum from the organic phase der...

Embodiment 3

[0192] Embodiment 3: verification of embodiment 1 and embodiment 2

[0193] In the following, determine the partition coefficient of the metal element:

[0194] - in the case of americium and curium, by calculating the ratio of the activity of these elements in a given organic phase relative to the activity of these same elements in an aqueous phase which has been placed in contact with this organic phase;

[0195] - in the case of other metallic elements, by calculating the difference between the initial and final concentrations of these elements in a given aqueous phase, and by calculating the difference between this difference and the initial concentrations of these same elements in these same aqueous phases ratio between.

[0196] All measurements of the activity of americium and curium were carried out by alpha spectrometry, while all measurements of the concentrations of other metal elements were carried out by atomic emission spectroscopy using inductively coupled plas...

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 relates to a method for selectively recovering americium from an aqueous nitric phase containing americium, curium, and fission products including lanthanides and yttrium, but free of uranium, plutonium and neptunium, or which contains only traces of the latter elements. The invention can be used for processing and recycling irradiated nuclear fuels, in particular to remove americium from raffinates from methods for extracting and purifying uranium and plutonium such as the PUREX and COEXTM methods.

Description

technical field [0001] The present invention relates to a process that allows the selective recovery (separation or extraction, recovery) of americium from an aqueous nitric acid phase containing americium, curium and fission products including lanthanides, but not Contains uranium, plutonium and neptunium or only traces of these last three elements. [0002] This method can be applied to the field of processing and recycling (regeneration or recovery, recycle) irradiated nuclear fuel (irradiated nuclear fuel, irrediated nuclear fuel), where it is useful for extracting (extracting, extract) and purifying uranium from and plutonium process methods such as PUREX and COEX TM The raffinate removal of americium from the process has the most particular advantages. Background technique [0003] Methods that allow the extraction and purification of uranium and plutonium present in liquids used to dissolve irradiated nuclear fuel, such as the PUREX method (which is currently used i...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/00C22B60/02G21C19/46G21F9/12C01G56/00
CPCC01G56/001G21C19/46C22B60/0295G21F9/125C22B3/0005C01P2006/80Y02P10/20Y02W30/50Y02E30/30C22B3/26C22B3/402
Inventor 格扎维埃·赫尔斯帕斯卡莱·巴伦克里斯蒂安·索雷尔克莱门特·希尔吉勒斯·贝尼耶
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com