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Preparation method of nano neodymium oxide with large specific surface area

A technology with a large specific surface area and neodymium oxide, which is applied in nanotechnology, chemical instruments and methods, and nanotechnology for materials and surface science, and can solve problems such as unfavorable mass production, high production costs, and environmental pollution. Achieve low cost, high controllability, and increase particle surface activity

Inactive Publication Date: 2017-01-04
常州卓煜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The specific surface area of ​​nano neodymium oxide prepared by the prior art is less than 50 m 2 / g, while the process is too complicated, the production cost is high, which is not conducive to mass production, and the raw materials used pollute the environment and are not environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0024] The present invention is a preparation method of nano neodymium oxide with large specific surface area, and the specific process is as follows:

[0025] (1) Take 5.9L of 1.5mol / L neodymium chloride solution, add 38.4L of deionized water at a temperature of 50°C, and prepare 0.2mol / L neodymium chloride solution A;

[0026] (2) Add 60g of sodium dodecylbenzenesulfonate to solution A and stir thoroughly;

[0027] (3) Take 800g of sodium carbonate, 400g of sodium bicarbonate and 400g of sodium oxalate respectively, add 51L of deionized water at a temperature of 50°C, and prepare 0.3mol / L solution B;

[0028] (4) In the case of continuous stirring of solution A, add solution B dropwise to solution A, control the rate of addition to 1.7L / min, and add the time for 30 minutes. After the addition of solution B, the pH value of the reaction system is 11 , the temperature of the reaction system was 43°C, and a white precipitate was produced at the same time;

[0029] (5) Continu...

Embodiment 2）

[0034] The present invention is a preparation method of nano neodymium oxide with large specific surface area, and the specific process is as follows:

[0035] (1) Take 4.92L of 1.8mol / L neodymium nitrate solution, add 17.2L of deionized water at a temperature of 60°C, and prepare 0.4mol / L neodymium nitrate solution A;

[0036] (2) Add 75g of sodium dodecylbenzenesulfonate to solution A and stir thoroughly;

[0037] (3) Take 800g of sodium carbonate, 400g of sodium bicarbonate and 400g of sodium oxalate respectively, add 30.6L of deionized water at a temperature of 60°C, and prepare 0.5mol / L solution B;

[0038] (4) In the case of continuous stirring of solution A, add solution B dropwise to solution A, control the rate of addition to 1.02L / min, and add the time for 30 minutes. After the addition of solution B, the pH value of the reaction system is 11 , the temperature of the reaction system was 47°C, and a white precipitate was produced at the same time;

[0039] (5) Conti...

Embodiment 3）

[0044] The present invention is a preparation method of nano neodymium oxide with large specific surface area, and the specific process is as follows:

[0045] (1) Take 6.33L of a mixed solution of 1.4mol / L neodymium chloride and neodymium nitrate, add 11.4L of deionized water at a temperature of 55°C, and prepare a 0.5mol / L solution A;

[0046] (2) Add 90g of polyethylene glycol 20000 to solution A and stir thoroughly;

[0047] (3) Take 800g of sodium carbonate, 400g of sodium bicarbonate and 400g of sodium oxalate respectively, add 38.3L of deionized water at a temperature of 55°C, and prepare 0.4mol / L solution B;

[0048] (4) In the case of continuous stirring of solution A, add solution B to solution A dropwise, control the dropping rate at 1.28L / min, and add the time for 30 minutes. After the addition of solution B, the pH value of the reaction system is 11 , the temperature of the reaction system was 45°C, and a white precipitate was produced at the same time;

[0049]...

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Abstract

The invention belongs to the technical field of preparation of rare earth oxide and particularly relates to a preparation method of nano neodymium oxide with large specific surface area. The method comprises the following steps: adding a surfactant into a neodymium-containing inorganic salt solution; dropwise adding a precipitant into the solution, and stirring for sufficient reaction of the two solutions; aging to obtain a precipitate; and washing the precipitate with deionized water, and performing vacuum drying and ignition to obtain nano neodymium oxide with large specific surface area. In the invention, through the application of the surfactant and control of the precipitant concentration and dropwise adding speed, according to TEM detection, the primary particle size of the prepared nano neodymium oxide is 20-60nm, and the specific surface area is 60-100m<2> / g. The method provided by the invention has the advantages of simple technology, relatively low cost and high controllability, remarkably improves the product purity and yield, and is environment-friendly and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth oxides, in particular to a method for preparing neodymium oxide with a large specific surface area. Background technique [0002] Neodymium oxide is a rare earth oxide with a wide range of uses. It is mainly used in neodymium iron boron (Nd-Fe-B) permanent magnets, TV glass shells, glass coloring, fluorescent materials, laser materials and rubber industry additives, because of oxidation Neodymium has an elegant color tone and a good discoloration effect. It is also widely used in high-tech fields such as ceramics, textile dyeing, superconductivity and other functional materials, and its growth momentum is very strong. In recent years, research on the application of neodymium oxide in the field of catalysis has become increasingly widespread, such as catalyzing the synthesis of polycarboxylic acid, amination of fatty alcohols, and synthetic rubber, etc., especially nano-neodymium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 龚晔
Owner 常州卓煜新材料科技有限公司
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