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A kind of preparation method of titanium dioxide and molybdenum trioxide composite powder

A technology of molybdenum trioxide and composite powder, which is applied in the direction of titanium oxide/hydroxide, titanium dioxide, molybdenum oxide/molybdenum hydroxide, etc., which can solve the problem of poor uniformity of powder materials, lack of diffusion movement, and the aggravation of titanium dioxide and molybdenum trioxide. Problems such as mutual distribution inhomogeneity, to achieve the effect of improving uniformity and ensuring uniformity

Active Publication Date: 2020-08-25
JINDUICHENG MOLYBDENUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Obviously, when using liquid-solid mechanical mixing method or solid-solid mechanical mixing method to prepare titanium dioxide and molybdenum trioxide composite powder, the diffusion power between titanium dioxide and molybdenum trioxide is insufficient, resulting in poor uniformity of the prepared powder material
The specific reasons are as follows: First, the mechanical mixing of titanium dioxide and molybdenum trioxide lacks the diffusion movement between molecular levels, resulting in the uneven distribution of titanium dioxide and molybdenum trioxide; The steric hindrance of the particles further increases the inhomogeneity of the mutual distribution of titanium dioxide and molybdenum trioxide; thirdly, the error of mechanical mixing operation aggravates the inhomogeneity of the mutual distribution of titanium dioxide and molybdenum trioxide

Method used

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preparation example Construction

[0026] A kind of preparation method of titanium dioxide and molybdenum trioxide composite powder of the present invention specifically comprises the following steps:

[0027] Step 1. Add deionized water to the beaker, continue to add ammonium titanyl oxalate monohydrate, stir to completely dissolve ammonium titanyl oxalate monohydrate in deionized water, and obtain ammonium titanyl oxalate monohydrate solution, wherein titanyl oxalate monohydrate The mass ratio of ammonium to deionized water is 1:3-1:13000.

[0028] Step 2. Weigh ammonia water and deionized water into the beaker, place the beaker on the electric heating mantle and stir, continue to add molybdenum trioxide, then start heating with the electric heating mantle, heat and continue to stir MoO 3 -H 2 O-NH 4 OH mixture to completely dissolve molybdenum trioxide to clarification to obtain ammonium molybdate solution, wherein the mass ratio of ammonia water to deionized water is 1:1-1:3, and the mass ratio of molybde...

Embodiment 1

[0034] Step 1. Add 50 g of deionized water to the beaker, continue to add 0.0412 g of ammonium titanyl oxalate monohydrate, and stir with a glass rod to completely dissolve the ammonium titanyl oxalate monohydrate in the deionized water to obtain an ammonium titanyl oxalate monohydrate solution;

[0035] Step 2. Weigh 1000g of ammonia water and 1000g of deionized water into the same beaker, then place the beaker on the electric heating mantle and stir it mechanically. The stirring speed is 280r / min. Continue to add 1000g of molybdenum trioxide, and then start using electricity Heating mantle heats, heats and stirs MoO 3 -H 2 O-NH 4 OH mixture to 65°C to completely dissolve molybdenum trioxide until clear to obtain ammonium molybdate solution;

[0036]Step 3, adding the ammonium titanyl oxalate monohydrate solution into the ammonium molybdate solution, and stirring at 65° C. for 1 hour to obtain the ammonium titanyl oxalate monohydrate-ammonium molybdate solution;

[0037] S...

Embodiment 2

[0041] Step 1. Add 100 g of deionized water to the beaker, continue to add 0.9936 g of ammonium titanyl oxalate monohydrate, and stir with a glass rod to completely dissolve the ammonium titanyl oxalate monohydrate in the deionized water to obtain an ammonium titanyl oxalate monohydrate solution;

[0042] Step 2. Weigh 1000g of ammonia water and 2500g of deionized water into the beaker respectively, then place the beaker on the electric heating mantle and stir mechanically at a stirring speed of 460r / min, continue to add 1000g of molybdenum trioxide, and then start electric heating Mantle heating, heat and stir the MoO 3 -H 2 O-NH 4 OH mixture to 79°C to completely dissolve molybdenum trioxide until clear to obtain ammonium molybdate solution;

[0043] Step 3, adding the ammonium titanyl oxalate monohydrate solution into the ammonium molybdate solution, and stirring at 86° C. for 3 hours to obtain an ammonium titanyl oxalate monohydrate-ammonium molybdate solution;

[0044]...

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Abstract

The invention discloses a preparation method of titanium dioxide and molybdenum trioxide composite powder, which dissolves ammonium titanyl oxalate monohydrate and ammonium molybdate in ammonia water to realize the molecular level diffusion movement mixing of titanium and molybdenum in the state of occurrence to form oxalic acid monohydrate Ammonium titanyl-ammonium molybdate homogeneous solution, and then the ammonium titanyl oxalate-ammonium molybdate monohydrate solution is dehydrated by spray drying to realize the preparation of titanium oxalate monohydrate from the ammonium titanyl oxalate-ammonium molybdate monohydrate solution Oxyammonium-ammonium molybdate uniform composite powder, and then crushed and sieved by a high-speed universal pulverizer, and finally high-temperature treatment thermally decomposes ammonium titanyl oxalate-ammonium molybdate monohydrate to prepare a titanium dioxide with uniform distribution , Titanium dioxide and molybdenum trioxide composite powder with good product consistency.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation methods, and in particular relates to a preparation method of titanium dioxide and molybdenum trioxide composite powder. Background technique [0002] Molybdenum trioxide is an important intermediate product in the molybdenum metallurgical industry chain. Its quality directly affects the quality and processing technology of downstream products such as molybdenum trioxide prepared from molybdenum powder and molybdenum-based catalysts. Accurate determination of molybdenum trioxide element content, particle size, and particle size distribution 1. Determining the crystal morphology of molybdenum trioxide is particularly important for evaluating the quality of molybdenum trioxide products. [0003] The atomic absorption method needs to use titanium dioxide and molybdenum trioxide composite powder as the basic sample to determine the content of metal titanium in molybdenum trioxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/02C01G23/08C01G23/053
CPCC01G23/053C01G23/08C01G39/02
Inventor 厉学武唐丽霞曹维成罗建海刘东新王磊杨秦莉安耿薛光弟郭军刚
Owner JINDUICHENG MOLYBDENUM CO LTD
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