Method for removing sodium ions from nanometer rare earth oxide prepared through sodium salt depositing process

A nano rare earth and rare earth oxidation technology, applied in rare earth metal oxides/hydroxides, rare earth metal compounds, chemical instruments and methods, etc., can solve problems such as high sodium ion content affecting the quality of applied products

Inactive Publication Date: 2018-11-27
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem existing in the prior art: when using a sodium salt precipitant to prepare nano-rare earth oxides, the sodium ion content of the obtained product is too high to affect the quality of the applied product. The present invention provides a nano Removal method of sodium ion in rare earth oxide

Method used

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  • Method for removing sodium ions from nanometer rare earth oxide prepared through sodium salt depositing process
  • Method for removing sodium ions from nanometer rare earth oxide prepared through sodium salt depositing process
  • Method for removing sodium ions from nanometer rare earth oxide prepared through sodium salt depositing process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of nanometer yttrium oxide

[0030] Prepare the yttrium oxide feed liquid with a concentration of 0.4mol / l, add sodium carbonate according to the molar ratio of yttrium oxide to precipitant: 1:1.6, then add 2% dispersant PEG2000, add positive precipitation dropwise, after the dropwise addition Stir for 1 hour, turn off the stirring and age for 2 hours, then filter with suction, wash until the pH of the washing water is 7, then burn at 850-900°C, keep warm for 1-3 hours, and finally sieve to obtain nanometer rare earth oxides. Tested: Na + : 3178ppm, the scanning electron microscope photo of nano rare earth oxide is as image 3 : Primary particle size: 30-70nm, good particle distribution.

[0031] 2. Washing nano-yttrium oxide to remove sodium ions

[0032] Step 1: Take pure water, heat it to 60°C, and adjust the pH to 0.5-1 with dilute nitric acid to obtain a washing solution;

[0033] Step 2: In the washing solution prepared in step (1), add the nano...

Embodiment 2

[0040] The preparation method of nanometer yttrium oxide is the same as embodiment 1.

[0041] Washing nanometer yttrium oxide to remove sodium ions

[0042] Step 1: Take pure water, heat it to 80°C, and adjust the pH to 1-2 with dilute nitric acid to obtain a washing solution;

[0043] Step 2: In the washing solution prepared in step (1), add the nano-rare earth oxide obtained after precipitation and burning and stir for 0.5h to wash, and filter with suction until it is drained, wherein the ratio of the oxide mass to the washing solution It is 1Kg: 20L.

[0044] Step 3: Repeat step (2) to step (3) for a total of 5 times;

[0045] Step 4: drying the washed and suction-filtered nano-rare earth oxide obtained in step (3) at 120° C., and sieving to obtain the nano-rare earth oxide after removing sodium ions.

[0046] Sodium ions dropped from 3178ppm to 90ppm. The effect is very obvious.

[0047] The primary particle size measured by the scanning electron microscope is 30-70n...

Embodiment 3

[0049] The preparation method of nanometer yttrium oxide is the same as embodiment 1.

[0050] Washing nanometer yttrium oxide to remove sodium ions

[0051] Step 1: Take pure water, heat it to 100°C, and adjust the pH to 2-3 with dilute nitric acid to obtain a washing solution;

[0052] Step 2: In the washing solution prepared in step (1), add the nano-rare earth oxide obtained after precipitation and burning and stir for 0.5h to wash, and filter with suction until it is drained, wherein the ratio of the oxide mass to the washing solution It is 1Kg: 20L.

[0053] Step 3: Repeat steps (2) to (3) for a total of 5 times;

[0054] Step 4: drying the washed and suction-filtered nano-rare earth oxide obtained in step (3) at 135° C., and sieving to obtain the nano-rare earth oxide after removing sodium ions.

[0055] Sodium ions dropped from 3178ppm to 92ppm. The effect is very obvious.

[0056]The primary particle size measured by the scanning electron microscope is 30-70nm, t...

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Abstract

The invention belongs to the technical field of rare earth compound preparation and specifically relates to a method for removing sodium ions from a nanometer rare earth oxide prepared with a sodium salt serving as a precipitating agent. The method comprises the following steps: adopting dilute nitric acid for adjusting pH of purified water, and then repeatedly washing the prepared nanometer rareearth oxide with water, wherein the content of sodium ions in the oxide washed with water is less than 100ppm, oxide grains are of spherical shape, primary grain size is 30-70 nanometer and the distribution is uniform. The method provided by the invention has the characteristics of simple processing conditions, low production cost and easiness in realizing industrial production. The whole preparation process meets the environmental protection requirement.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth oxides. Specifically relates to a method for removing sodium ions in nano rare earth oxides prepared by a sodium salt precipitation method. Background technique [0002] The special electronic configuration of rare earth elements makes them have special optical, electrical and magnetic properties. Applications. Rare earth oxides are an important class of rare earth compounds and have a wide range of uses. With the advancement of science and technology and the continuous development of application technology, the value of rare earth oxides will increase. Among them, nano rare earth oxides exhibit particularly superior properties. [0003] In the process of preparing nano-rare earth oxides, after generating nano-oxides, it is necessary to use a precipitant to precipitate nano-oxides for further separation and purification. Choosing a suitable precipitant is of great significan...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y30/00
CPCB82Y30/00C01F17/206C01P2004/03C01P2004/04C01P2004/64C01P2006/80
Inventor 杨应亚
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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