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Preparation method and system of lanthanum acetate

A preparation system and technology of lanthanum acetate, applied in the field of preparation of lanthanum acetate, can solve the problems of not being able to consult patent documents, difficult to achieve, etc., and achieve the effects of easy filtration and drying, short reaction time and high total amount

Inactive Publication Date: 2015-02-11
JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technology of producing lanthanum acetate is difficult to meet such requirements
[0005] In the prior art, even the patent documents related to the preparation of lanthanum acetate cannot be found

Method used

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  • Preparation method and system of lanthanum acetate
  • Preparation method and system of lanthanum acetate

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Embodiment Construction

[0034] Such as figure 2 As shown, the system for preparing high-purity and high-volume lanthanum acetate according to the present invention comprises: dissolution reactor 1, lanthanum carbonate inlet 2, nitric acid inlet 3, lanthanum nitrate feed liquid output 4, oil removal device 5, lanthanum nitrate Feed liquid inlet 6, primary airtight filter tank 7, secondary airtight filter tank 8, double-layer filter cloth with filter paper in the middle 9, precision filter pump 10, storage tank 11, precipitation reaction kettle 12, lanthanum nitrate feed liquid Entry port 13, ammonium bicarbonate solution entry port 14, stirring device 15, crystallization reactor 16, acetic acid entry port 17, refined lanthanum carbonate feed liquid entry port 18, lanthanum acetate feed liquid output port 19, filtration and drying device 20, drying device 21.

[0035] The technological scheme is as follows:

[0036] Put high-purity lanthanum carbonate (>99.99%) quantitatively into reactor 1 through ...

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Abstract

The invention relates to a preparation method and system of lanthanum acetate. The preparation method of cerium acetate comprises the following steps: completely dissolving lanthanum carbonate in nitric acid to obtain a lanthanum nitrate solution, and regulating the pH value and temperature to perform hydrolysis and impurity removal; filtering the obtained lanthanum nitrate solution for purification; and converting the purified lanthanum nitrate solution into refined lanthanum carbonate by using ammonium bicarbonate as a conversion agent, transforming and crystallizing by acetic acid to obtain lanthanum acetate, filtering, and drying to obtain the lanthanum acetate product. The lanthanum acetate product prepared by the method has high purity, and the rare-earth purity is greater than 99.99%. The non-rare-earth impurity content is low and is generally less than 10 ppm. The Cl<-> content is less than 10 ppm, and the SO4<2-> content is less than 10 ppm.

Description

technical field [0001] The invention relates to a preparation method and system of lanthanum acetate, belonging to the field of hydrometallurgy for rare earth production. Background technique [0002] Lanthanum acetate is an important industrial raw material, which is used in automobile exhaust purification, catalysts, special ceramics, etc., and has a very broad application prospect. [0003] With the development of science and technology, foreign high-end customers have put forward higher and higher requirements for the quality of lanthanum acetate, requiring the purity of rare earth to be higher than 99.99%, the content of non-rare earth impurities to be generally lower than 10ppm, the content of chloride ion to be lower than 10ppm, and the sulfate ion content to be lower than 10ppm. The content is less than 10ppm, the nitrate ion content is less than 2000ppm, and the acid solubility is good. [0004] The prior art of producing lanthanum acetate is difficult to meet such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/10
CPCC07C51/412C07C53/10
Inventor 周武风游奇峰李常清张五国詹海波
Owner JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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