Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing europium oxide by plant precipitant

A precipitant, a technology of europium oxide, applied in chemical instruments and methods, rare earth metal oxides/hydroxides, inorganic chemistry, etc. Good, high purity, easy to filter and wash

Inactive Publication Date: 2018-08-17
INNER MONGOLIA UNIV OF SCI & TECH +2
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent documents such as publication numbers CN106745167A, CN106517296A, CN106587130A, CN106587129A, CN106636639A, CN106834756A and CN106399689A disclose a method for preparing light rare earth oxides such as La, Ce, Pr, and Nd by herbal precipitants, but the above-mentioned patent documents do not involve and other single medium and heavy rare earth oxides, and the plant precipitating agent involved in the present invention includes precipitating agents made from herbal plants and non-herbal plants

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 preparing europium oxide by plant precipitant
  • Method for preparing europium oxide by plant precipitant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for preparing europium oxide with a plant precipitant, specifically comprising the following steps:

[0029] S1: Add 1 L of europium chloride solution with a concentration of 0.5 mol / L to the reaction kettle and heat it to 50°C, then add 1.5 L of plant precipitation agent to it to obtain a mixed reaction system; adjust the pH value of the mixed reaction system to 6.7 to obtain White crystalline form precipitated.

[0030] S2: The white crystal precipitate and the mother liquor were left to age for 12 hours, and the white precipitate after standing and aging was filtered and washed, and burned at 950°C for 2 hours to obtain the europium oxide product.

Embodiment 2

[0032] This embodiment provides a method for preparing europium oxide with a plant precipitant, specifically comprising the following steps:

[0033] S1: Add 100L of europium nitrate solution with a concentration of 1.0mol / L to the reaction kettle and heat it to 55°C, then add 200L of plant precipitant to it to obtain a mixed reaction system; adjust the pH value of the mixed reaction system to 6.8 to obtain a white crystal Type precipitation.

[0034] S2: The white crystal precipitate and the mother liquor were left to age for 24 hours, and the white precipitate after standing and aging was filtered, washed, and burned at 950° C. for 3 hours to obtain the europium oxide product.

Embodiment 3

[0036] This embodiment provides a method for preparing europium oxide with a plant precipitant, specifically comprising the following steps:

[0037] S1: Add 10L of europium nitrate solution with a concentration of 0.5mol / L to the reaction kettle and heat it to 90°C, then add 20L of plant precipitant to it to obtain a mixed reaction system; adjust the pH value of the mixed reaction system to 7 to obtain a white crystal Type precipitation.

[0038] S2: The white crystal precipitate and the mother liquor were left to age for 24 hours, and the white precipitate after standing and aging was filtered, washed, and burned at 950° C. for 3 hours to obtain the europium oxide product.

[0039] In addition, in order to further highlight the advantages of the technical solution of the present invention, the following comparative experiments were carried out. It should be noted that the following comparative examples are all set on the basis of the third embodiment.

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 preparing europium oxide by a plant precipitant, which comprising the following steps of S1: adding a europium solution (one or more of chloride solution, salpeter solution and sulfuric acid solution) with the rare earth (REO) concentration being 0.2 to 1.5mol / L into a reaction kettle, heating to 40 to 100 DEG C, then adding the plant precipitant, wherein themass ratio of plant precipitant liquid to the REO in the europium solution is (5 to 50) to 1, so as to obtain a mixed reaction system; regulating the pH value of the mixed reaction system to be 6 to 8, so as to obtain white crystalline precipitation. S2: standing and aging the white crystalline precipitation with a mother solution for 0.5 to 72 hours, filtering and washing the stood and aged whitecrystalline precipitation, firing for 1 to 12 hours at 850 to 1,100 DEG C, so as to obtain a europium oxide product. By adopting the method provided by the invention, the yield and purity of the europium oxide product are high, and the precipitated mother solution wastewater contains no ammonia nitrogen; the method is green and environmentally friendly, and is suitable for large-scale industrialproduction.

Description

technical field [0001] The invention relates to the technical field of rare earth hydrometallurgy, in particular to a method for preparing europium oxide by using a plant precipitant. Background technique [0002] Europium oxide (Eu 2 o 3 ) is used in the manufacture of fluorescent materials, laser materials and activators for x-ray intensifying screens, and is also used in stimulated emission phosphors for new x-ray medical diagnostic systems. It can also be used to make colored lenses and optical filters, used in magnetic bubble storage devices, atomic reactor control materials, shielding materials and structural materials, europium can absorb more neutrons than other elements, and is used in atomic reactors as an absorption Neutron materials, raw materials for the synthesis of other europium compounds. With the development of science and technology, europium oxide will show its importance in the field of special-purpose materials. [0003] The preparation of rare eart...

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): C01F17/00
CPCC01F17/206C01P2006/80
Inventor 杨启山马莹杨叶平杨卉兰大为李红喜李阳
Owner INNER MONGOLIA UNIV OF SCI & TECH