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Anhydrous neodymium chloride preparation method

A technology of neodymium chloride and neodymium carbonate, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of high content of chlorine oxides, incomplete satisfaction, poor stability, etc., and achieve reduction of chlorine oxidation content, reduce non-rare earth impurities, and improve water solubility

Inactive Publication Date: 2019-08-06
蒋盼盼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Anhydrous neodymium chloride is mainly used in rubber, pharmaceutical and other industries. At present, there are only a few factories that can produce this product. The anhydrous neodymium chloride currently on the market is mainly made of neodymium chloride hexahydrate at an appropriate temperature. It is prepared by constant temperature dehydration. The anhydrous neodymium chloride prepared by the above method has a high content of chloride oxide, poor solubility, and poor stability, which cannot fully meet user requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of anhydrous neodymium chloride, comprising the following steps:

[0021] Step 1: Prepare 1 part of neodymium carbonate and 2 parts of dilute hydrochloric acid and add them to a mixing mixer for stirring at a stirring speed of 30 r / min for 3 minutes, and stand still for 1 minute after stirring to obtain an acidic mixed solution;

[0022] Step 2: add stabilizer: add stabilizer triethanolamine solution and stabilizer sodium tripolyphosphate solution successively in the acidic mixed solution that obtains in step 1, triethanolamine solution accounts for 0.5% of acidic mixed solution, sodium tripolyphosphate solution accounts for 0.2% of the acidic mixed solution, after the addition is completed, turn on the mixing agitator and stir for 10 minutes to obtain a stable mixed solution;

[0023] Step 3: Adjust the PH value: put the weak acidic solution into the stable mixed solution obtained in step 2 at a uniform speed, use a PH value tester to test, adjust ...

Embodiment 2

[0034] A preparation method of anhydrous neodymium chloride, comprising the following steps:

[0035] Step 1: Prepare 1.2 parts of neodymium carbonate and 2.2 parts of dilute hydrochloric acid and add them to a mixing mixer for stirring, the stirring speed is 35 r / min, the stirring time is 4 minutes, and stand still for 2 minutes after the stirring is completed to obtain an acidic mixed solution;

[0036] Step 2: add stabilizer: add stabilizer triethanolamine solution and stabilizer sodium tripolyphosphate solution successively in the acidic mixed solution that obtains in step 1, triethanolamine solution accounts for 0.7% of acidic mixed solution, sodium tripolyphosphate solution accounts for 0.4% of the acidic mixed solution, after the addition is completed, open the mixing agitator and stir for 15 minutes to obtain a stable mixed solution;

[0037] Step 3: Adjust the PH value: Add a weak acidic solution to the stable mixed solution obtained in Step 2 at a constant speed, use...

Embodiment 3

[0048] A preparation method of anhydrous neodymium chloride, comprising the following steps:

[0049] Step 1: Prepare 1.5 parts of neodymium carbonate and 2.5 parts of dilute hydrochloric acid and add them to a mixing mixer for stirring, the stirring speed is 40 r / min, the stirring time is 5 minutes, and stand still for 3 minutes after the stirring is completed to obtain an acidic mixed solution;

[0050]Step 2: add stabilizer: add stabilizer triethanolamine solution and stabilizer sodium tripolyphosphate solution successively in the acidic mixed solution that obtains in step 1, triethanolamine solution accounts for 0.8% of acidic mixed solution, sodium tripolyphosphate solution accounts for 0.6% of the acidic mixed solution, after the addition is completed, open the mixing agitator and stir for 20 minutes to obtain a stable mixed solution;

[0051] Step 3: Adjust the pH value: put the weak acidic solution into the stable mixed solution obtained in step 2 at a uniform speed, u...

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Abstract

The invention discloses an anhydrous neodymium chloride preparation method, which comprises: stabilizer adding, pH value adjusting, impurity removal through filtering, microfiltration, evaporation concentration, cooling crystallization, centrifugal dehydration, preliminary drying dehydration, medium dehydration and complete dehydration to prepare the anhydrous neodymium chloride. According to thepresent invention, the preparation method is simple and reasonable; through the multiple filtrations and the multiple dehydrations, the oxychloride content in the anhydrous neodymium chloride can be effectively reduced so as to improve the water solubility of the anhydrous neodymium chloride and reduce the non-rare earth impurities in the product; by adding the two stabilizers, the prepared anhydrous neodymium chloride has high stability; and the preparation method has low requirements on the equipment, has high operability, and is suitable for good social promotion application.

Description

technical field [0001] The invention relates to the technical field related to anhydrous neodymium chloride, in particular to a preparation method of anhydrous neodymium chloride. Background technique [0002] Anhydrous neodymium chloride is mainly used in rubber, pharmaceutical and other industries. At present, there are only a few factories that can produce this product. The anhydrous neodymium chloride currently on the market is mainly made of neodymium chloride hexahydrate at an appropriate temperature. It is prepared by constant temperature dehydration. The anhydrous neodymium chloride prepared by the above method has a high content of chloride oxide, poor solubility, and poor stability, which cannot fully meet the requirements of users. Therefore, it is necessary to invent a kind of preparation method of anhydrous neodymium chloride to solve the above problems. Contents of the invention [0003] The object of the present invention is to provide a kind of preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/271
Inventor 蒋盼盼
Owner 蒋盼盼
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