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The preparation method of bismuth vanadate pigment

A technology of bismuth vanadate and pigments, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, vanadium compounds, etc., which can solve the problems of high cost, high price and no practical effect of bismuth vanadate pigments, so as to maintain color performance , the effect of reducing production costs

Active Publication Date: 2015-11-25
昆明先导新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of raw materials of bismuth vanadate pigments, it is expensive, so it is difficult to popularize and apply it in large quantities.
However, bismuth vanadate pigments are actually used and functioned only on the outer surface of the pigment particles, and the inner core of the particles does not play a practical role, resulting in a huge waste of resources

Method used

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preparation example Construction

[0007] First, the preparation method of the bismuth vanadate pigment according to the present invention is explained.

[0008] The preparation method of bismuth vanadate pigment according to the present invention comprises the steps of: adding nano-silica particles into pure water, dispersing and preparing SiO 2 Slurry; preparation containing anti-Bi (NO 3 ) 3 Bi(NO) of hydrolyzed nitric acid 3 ) 3 solution, the SiO 2 Slurry and Bi(NO 3 ) 3 The solution was mixed and stirred to obtain Bi(NO 3 ) 3 -SiO 2 Slurry; metavanadate NaVO 3 or NH 4 VO 3 Dissolved in NaOH to obtain NaVO 3 or NH 4 VO 3 solution, to which surfactants were added; the NaVO 3 or NH 4 VO 3 The solution was added with Bi(NO 3 ) 3 -SiO 2 In the slurry, the pH is adjusted, and the temperature is controlled to carry out the reaction, and after the reaction is completed, suction filtration, washing, drying and calcination are performed to obtain the bismuth vanadate pigment.

[0009] In the pre...

Embodiment 1

[0017] The nano-silica particles were added to pure water, and ultrasonically dispersed for 0.5 h to prepare 50 mL of SiO with a concentration of 1 mol / L. 2 slurry;

[0018] Prepare 1mol / LBi(NO 3 ) 3 The solution is 50 mL and contains an excess of 10 mL of nitric acid with a concentration of 14 mol / L to prevent Bi(NO 3 ) 3 hydrolysis, the SiO 2 Slurry and Bi(NO 3 ) 3 The solutions were mixed and mechanically stirred to obtain Bi 3+ 100mL of stable slurry of 0.5mol / L;

[0019] NaVO 3 Dissolved in 1.5 mol / L NaOH to obtain a mixture with Bi(NO 3 ) 3 Equal concentration of NaVO 3 solution 100mL, and 0.1%wt surfactant sodium tripolyphosphate was added to the solution;

[0020] Stirring at 800 rpm, the NaVO 3 The solution was slowly added dropwise to an equal volume of Bi(NO 3 ) 3 -SiO 2 In the slurry, the pH was adjusted to 5.5 with NaOH, and the temperature was raised to 55 °C for constant temperature reaction for 0.5 h, then suction filtered, washed with pure wate...

Embodiment 2

[0023] The nano-silica particles were added to pure water, ultrasonically dispersed for 2h, and prepared into 500mL with a concentration of 10mol / LSiO 2 slurry;

[0024] Preparation of 3mol / LBi(NO 3 ) 3 The solution is 500mL and contains an excess of 100mL of nitric acid with a concentration of 14mol / L to prevent Bi(NO 3 ) 3 hydrolysis, the SiO 2 Slurry and Bi(NO 3 ) 3 The solutions were mixed and mechanically stirred to obtain Bi 3+ 1000mL of stable slurry of 1.5mol / L;

[0025] NaVO 3 Dissolved in 8.5 mol / L NaOH to obtain a mixture with Bi(NO 3 ) 3 Equal concentration of NaVO 3 solution 1000mL, and 1.5% surfactant sodium tripolyphosphate was added to the solution;

[0026] Stirring at 800 rpm, the NaVO 3 The solution was slowly added dropwise to an equal volume of Bi(NO 3 ) 3 -SiO 2In the slurry, the pH was adjusted to 9 with ammonia water, and the temperature was raised to 95 °C for constant temperature reaction for 3 hours, then suction filtration, washed wi...

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Abstract

The invention provides a preparation method of a bismuth vanadate pigment. The preparation method comprises the following steps: adding nano silica particles into purified water, and dispersing to obtain an SiO2 slurry; preparing a Bi(NO3)3 solution containing nitric acid for preventing Bi(NO3)3 hydrolysis, mixing the SiO2 slurry with the Bi(NO3)3 solution, and stirring to obtain a Bi(NO3)3-SiO2 slurry; dissolving metavanadate NaVO3 or NH4VO3 in NaOH to obtain an NaVO3 or NH4VO3 solution, and adding a surfactant into the solution; adding the NaVO3 or NH4VO3 solution into the Bi(NO3)3-SiO2 slurry, adjusting pH, controlling the temperature to carry out a reaction, after the reaction is completed, carrying out suction filtration, washing, drying, and calcining to obtain the bismuth vanadate pigment. The preparation method of the bismuth vanadate pigment adopts silica as an inner core, can greatly reduce the production cost, and besides maintains color properties of the pigment surface.

Description

technical field [0001] The invention relates to a preparation method of an inorganic pigment, in particular to a preparation method of a bismuth vanadate pigment. Background technique [0002] Bismuth vanadate pigment is a kind of inorganic yellow pigment with good overall performance, non-toxic and environmental protection. It is an excellent substitute for yellow pigment containing toxic heavy metals such as lead, chromium and cadmium. It is used to prepare high-quality special coatings and durability. Good premium inks such as yellow automotive topcoats, powder coatings, premium architectural coatings, etc. However, due to the high raw material cost of bismuth vanadate pigment, its price is expensive, so it is difficult to popularize and apply in large quantities. However, the actual utilization and function of bismuth vanadate pigments is only the outer surface of the pigment particles, and the inner core of the particles does not play a practical role, resulting in a h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/06C01G31/00
Inventor 李蓉裴志明赵青燕刘华胜
Owner 昆明先导新材料科技有限责任公司
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