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Preparation method of oil-free rare earth carbonate

A rare-earth carbonate and rare-earth feed solution technology, which is applied in the direction of rare-earth metal compounds, rare-earth metal carbonates, chemical instruments and methods, etc., can solve the problems of non-recyclable extraction agents and non-recyclable oil removal materials, etc., and achieve low cost, The effect of high resource utilization

Inactive Publication Date: 2018-04-06
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a preparation method of oil-free rare earth carbonate, which solves the problem that the degreasing material cannot be reused and the extraction agent cannot be recovered

Method used

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  • Preparation method of oil-free rare earth carbonate
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  • Preparation method of oil-free rare earth carbonate

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preparation example Construction

[0029] The preparation method of oil-free rare earth carbonate specifically comprises the following steps:

[0030] Step 1: degreasing the raw materials;

[0031] Step 11: degreasing the rare earth material liquid obtained by extraction and separation;

[0032] Pass the single or mixed rare earth feed liquid through the three-stage coalescing oil-water separator. The rare earth feed liquid includes: rare earth chloride feed liquid, rare earth nitrate feed liquid or rare earth sulfuric acid feed liquid, and the flow rate is controlled at 100L / h~200L / h to obtain Oil-free single or mixed rare earth feed liquid, and the extraction agent is recovered through the oil collection cup 11. The rare earth elements in the rare earth feed liquid include: one or more of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.

[0033] The three-stage coalescing oil-water separator includes three coalescing oil-water separator splits 1. The coalescing oil-water separator split 1 is provided...

Embodiment 1

[0048] 1) Raw material treatment: Pass the lanthanum chloride feed liquid obtained by extraction and separation through a three-stage coalescing oil-water separator (the coalescence material is modified polyvinyl chloride), and the flow rate is controlled at 100L / h to obtain an oil-free lanthanum chloride feed liquid. And reclaim extractant by oil collecting cup; Add deionized water to dissolve precipitant ammonium bicarbonate again and become concentration and be 8% solution to pass fiber ball filter (fiber ball raw material is modified polyester), flow velocity is controlled at 15L / h, Obtain an oil-free ammonium bicarbonate solution;

[0049] 2) Precipitation: add the oil-free lanthanum chloride feed solution obtained in step (1) to the reaction kettle and raise the temperature to 30°C, add oil-free ammonium bicarbonate to it, and when the pH value of the reaction system is 6.7, an easily filterable crystal form is obtained Precipitation, the crystalline precipitate and the ...

Embodiment 2

[0053] 1) raw material treatment: the cerium chloride feed liquid obtained by extraction and separation is passed through a three-stage coalescing oil-water separator (the coalescence material is modified polyvinyl chloride), and the flow rate is controlled at 150L / h to obtain an oil-free cerium chloride feed liquid, And reclaim the extractant by the oil collecting cup; Add the precipitating agent ammonium bicarbonate and deionized water and dissolve into a concentration of 10% solution to pass through the fiber ball filter (the fiber ball raw material is modified polyester), and the flow rate is controlled at 16L / h. Obtain an oil-free ammonium bicarbonate solution;

[0054] 2) Precipitation: Add the oil-free cerium chloride feed solution obtained in step (1) to the reaction kettle and raise the temperature to 50°C, add oil-free ammonium bicarbonate to it, and when the pH value of the reaction system is 7.0, an easily filterable crystal form is obtained Precipitation, after th...

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Abstract

The invention discloses a preparation method of oil-free rare earth carbonate, which includes steps of: deoiling a rare earth material liquid, obtained via extraction and separation, and a precipitator; mixing the oil-free rare earth material liquid and the precipitator solution and performing precipitation; and washing and filtering solid rare earth carbonate to obtain the oil-free rare earth carbonate. The method solves the problem that the deoiling material cannot be used repeatedly and the extraction agent cannot be recycled.

Description

technical field [0001] The invention relates to a preparation method of rare earth materials, in particular to a preparation method of oil-free rare earth carbonate. Background technique [0002] Because rare earth elements have a series of special properties, they are widely used in various fields of the national economy such as metallurgical machinery, petrochemical industry, glass ceramics, atomic energy, functional materials, and textiles, medicine, agriculture, and aquaculture. With the development of modern science and technology, rare earth has become an indispensable material in the development of high-tech and new functional materials. [0003] In rare earth industrial production, rare earth carbonate is an intermediate raw material for the preparation of various rare earth products. It has a wide range of uses, so it occupies an extremely important position. At present, the international market has put forward high requirements on the physical and chemical propert...

Claims

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Application Information

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IPC IPC(8): C01F17/00
CPCC01F17/247C01P2006/80
Inventor 马莹张文娟包呈敏李娜侯少春丁艳蓉郝一凡李二斗宋静
Owner BAOTOU RES INST OF RARE EARTHS
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