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Preparation method of molybdenum bismuth vanadate yellow pigment

A technology for bismuth molybdate vanadate and yellow pigments, applied in the field of inorganic pigments, can solve the problems of poor covering power, difficult to popularize, and high cost of pure bismuth vanadate, and achieve the effects of reducing production cost, simple production process and shortening calcination time.

Inactive Publication Date: 2014-02-26
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of seeking high-quality non-toxic inorganic yellow pigments, people have focused on single crystal bismuth vanadate pigments, but its hiding power is poor, and the cost of manufacturing pure bismuth vanadate is quite high, so it is difficult to promote in large quantities

Method used

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  • Preparation method of molybdenum bismuth vanadate yellow pigment
  • Preparation method of molybdenum bismuth vanadate yellow pigment

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Take 6.596g V 2 o 5 , 42.245g Bi 2 o 3 , 7.816g MoO 3 After mixing and milling for 30 minutes, add 92.670g NaNO 3 and 113.411g KNO 3 Continue ball milling for 10 minutes to make a powder precursor.

[0025] (2) Calcining the powder precursor obtained in step (1) in a muffle furnace at 450° C. for 5 hours in an air atmosphere.

[0026] (3) Naturally cool the material obtained in step (2) to room temperature, dissolve the nitrate in it with hot water, separate the solid sample by suction filtration, and then dry it at 100°C to obtain BiVO with a composite structure 4 0.75Bi 2 MoO 6 product.

Embodiment 2

[0028] (1) Take 5.969g V 2 o 5 , 30.584g Bi 2 o 3 , 4.724g MoO 3 After mixing and milling for 20 minutes, add 33.104g LiNO 3 and 28.542g KNO 3 Continue ball milling for 10 minutes to make a powder precursor.

[0029] (2) Calcining the powder precursor obtained in step (1) in a muffle furnace at 350° C. for 10 hours in an air atmosphere.

[0030] (3) Naturally cool the material obtained in step (2) to room temperature, dissolve the nitrate in it with hot water, separate the solid sample by suction filtration, and then dry it at 90°C to obtain BiVO with a composite structure 4 0.5Bi 2 MoO 6 product.

Embodiment 3

[0032] (1) Take 11.641g V 2 o 5 , 41.749g Bi 2 o 3 , 3.685g MoO 3 After mixing and milling for 10 minutes, add 114.150g NaNO 3 , and continue ball milling for 10 minutes to make a powder precursor.

[0033] (2) Calcining the powder precursor obtained in step (1) in a muffle furnace at 400° C. for 12 hours in an air atmosphere.

[0034] (3) Naturally cool the material obtained in step (2) to room temperature, dissolve the nitrate in it with hot water, separate the solid sample by suction filtration, and then dry it at 120°C to obtain BiVO with a composite structure 4 0.2Bi 2 MoO 6 product.

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Abstract

The invention discloses a preparation method of molybdenum bismuth vanadate yellow pigment. The method includes: taking Bi2O3, V2O5 and MoO3 as raw materials, adopting an alkali metal nitrate as a molten salt medium, conducting ball milling to obtain a powder precursor, and then preparing the molybdenum bismuth vanadate yellow pigment by a molten salt technique. The method provided by the invention utilizes the liquid environment provided by the molten salt medium to effectively lower the calcination temperature for product synthesis and shorten the time of heat preservation, thus helping to reduce energy consumption, and also avoiding the problem of great acid and alkali consumption in a liquid phase precipitation-calcination method. Therefore, the method is conducive to production cost reduction. The raw materials involved in the method are easily available, the product has good quality and uniform particle size distribution, the preparation process is simple and is easy to realize industrialization.

Description

technical field [0001] The invention belongs to the technical field of inorganic pigments, in particular to a method for synthesizing high-performance bismuth molybvanadate yellow pigment by a molten salt method. Background technique [0002] The most commonly used inorganic yellow pigments in the world today are chrome yellow and cadmium yellow. Although they have a long history of application because of their good performance, they contain lead, chromium, cadmium and other heavy metal elements that endanger human health and pollute the environment. The field of application is increasingly restricted by relevant regulations. For example, the European Union legislated in 1992 that all lead compounds and compounds with lead content ≥ 0.15% must be marked with the skull cross symbol and the words "will cause damage to unborn babies", resulting in lead-free pigments used in industrial paints tendency is increasing. Therefore, in recent years, increasing attention has been pai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00
Inventor 唐安平徐国荣周智华令玉林刘立华
Owner HUNAN UNIV OF SCI & TECH
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