Preparation method of coated bismuth vanadate pigment

A bismuth vanadate and coating type technology is applied in the field of preparation of coating type bismuth vanadate pigments, which can solve the problems of weakened acid resistance of pigments, poor pigment performance, inability to improve the performance of bismuth vanadate, etc., so as to improve the acid resistance. , performance improvement, the effect of improving the coating effect

Active Publication Date: 2014-01-22
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

[0003] However, these coating processes are basically operated in a continuous multi-layer coating mode, but these coating processes are susceptible to interference from various ions left in previous operations, such as US Patent No. 6,423,131, when the first A layer of coated Al(OH) 3 There will be a lot of CO remaining in the solution 3 2- 、HCO 3 - , when thereafter coated with CaF 2 , CaSiO 3 , Ca3(PO 4 ) 2 , Ca 2 SiO 5 , Zn 3 (PO 4 ) 2 When equivalent, CaCO will be generated 3 , ZnCO 3 etc., so that all Ca 2- , Zn 2- The presence of these carbonates will weaken the acid r

Method used

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Examples

Experimental program
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Example Embodiment

[0013] The preparation method of the coated bismuth vanadate pigment according to the present invention includes the steps of: providing a bismuth vanadate matrix with a prescribed particle size; preparing a bismuth vanadate matrix with a prescribed particle size and pure water to prepare a coated basic slurry; The coating base slurry is heated to carry out chemical reaction coating and pH adjustment. After the coating reaction is completed, it is filtered, washed, dried, calcined, wet milled, filtered, and washed to obtain coated bismuth vanadate; Bismuth vanadate and purified water to prepare coating basic slurry, repeat the previous step to a specified number of times to obtain the final coated bismuth vanadate pigment.

[0014] In the method for preparing the coated bismuth vanadate pigment according to the present invention, preferably, the specified number of repetitions is 1-3 times.

[0015] In the method for preparing the coated bismuth vanadate pigment according to the pr...

Example Embodiment

[0027] Example 1

[0028] Take 100g of bismuth vanadate substrate with an average particle size of 0.6μm, add 2L of purified water, stir to prepare a bismuth vanadate slurry, heat to 60℃, take 5.16g of ZnO and add HNO 3 After dissolving, add pure water to make the volume 43ml (to make Zn 2+ The concentration is 1.47mol / L), drip into the bismuth vanadate slurry, drip in 1.5h, and use 0.5mol / L Na 3 PO 4 ·12H 2 O maintains the pH value of 7.0. After the dripping is completed, continue to heat and stir for 1h, centrifuge precipitation filter, washing machine washing, drying, calcining in a muffle furnace at 400℃ for 2h, drum ball mill at 60RPM speed for wet ball milling for 1h, centrifuge Precipitation filtration, washing machine washing to obtain a layer of coated bismuth vanadate powder;

[0029] Prepare a slurry with pure water and a layer of coated bismuth vanadate powder at a mass ratio of 10:1, heat it to 65°C, and add 70ml1mol / L AlCl 3 Drop into the slurry, drop it within 30 minu...

Example Embodiment

[0032] Example 2

[0033] Take 100g of bismuth vanadate substrate with an average particle size of 0.6μm, add 2L of purified water, stir to prepare a bismuth vanadate slurry, heat to 30℃, take 3.39g of ZnO and add HNO 3 After dissolving, add pure water to make the volume 43ml (to make Zn 2+ The concentration is 0.97mol / L), drip into the bismuth vanadate slurry, drip in 1.5h, and use 0.5mol / L Na 3 PO 4 ·12H 2 O maintains the pH value of 7.0. After the addition is completed, continue to keep heat and stir for 1 hour, centrifuge precipitation filter, washing machine washing, drying, calcination in the muffle furnace at 200 ℃ for 2 hours, drum ball mill at 10RPM speed wet ball milling for 1 hour, centrifuge Precipitation filtration and washing machine washing to obtain a layer of coated bismuth vanadate powder;

[0034] Prepare a slurry with purified water and a layer of coated bismuth vanadate powder at a mass ratio of purified water of 10:1, heat it to 95°C, add 70mL1mol / L AlCl 3 Drop...

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PUM

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Abstract

The present invention provides a method for preparing a coated bismuth vanadate pigment, comprising steps of: providing a bismuth vanadate substrate of a specified particle size; adding pure water to the bismuth vanadate substrate of the specified particle size to formulate a basic coating slurry; heating the basic coating slurry, carrying out a chemical reaction for coating, adjusting the pH, and carrying out filtering, washing, drying, sintering, wet milling, filtering and washing after the coating reaction is complete, to obtain coated bismuth vanadate; and adding pure water to the obtained coated bismuth vanadate to formulate a basic coating slurry, and repeating the previous step for a specified number of times, to obtain a final coated bismuth vanadate pigment. Through the method for preparing a coated bismuth vanadate pigment of the present invention, acid resistance, alkali resistance and temperature resistance of the obtained coated bismuth vanadate pigment can be improved, thereby avoiding interference between different layers in the multilayer coating process.

Description

technical field [0001] The invention relates to a preparation method of a bismuth vanadate pigment, in particular to a preparation method of a coated bismuth vanadate pigment. Background technique [0002] The existing bismuth vanadate coating method is CaSiO 3 , Ca 3 (PO 4 ) 2 , Ca 2 SiO 5 , SiO 2 , CaF 2 , Zn 3 (PO 4 ) 2 , AlOOH, BiOCl, etc., to improve the weather resistance, light resistance, chemical corrosion resistance, dispersibility, etc. of coatings and plastics made of bismuth vanadate. [0003] However, these coating processes are basically operated in a continuous multi-layer coating mode, but these coating processes are susceptible to interference from various ions left in previous operations, such as US Patent No. 6,423,131, when the first A layer of coated Al(OH) 3 There will be a lot of CO remaining in the solution 3 2- 、HCO 3 - , when thereafter coated with CaF 2 , CaSiO 3 , Ca3(PO 4 ) 2 , Ca 2 SiO 5 , Zn 3 (PO 4 ) 2 When equivalent...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/06
CPCC09C1/62C09C3/04C09C3/06C09C1/0006C01P2004/62C01P2004/84
Inventor 裴志明朱刘赵青燕李蓉刘华胜
Owner 昆明先导新材料科技有限责任公司
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