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Production of coated bismuth vanadate pigment

A technology of bismuth vanadate and yellow pigment is applied in the directions of inorganic pigment treatment, fibrous filler, chemical instruments and methods, etc., and can solve the problems of reducing the production cost of bismuth vanadate pigment and the like

Inactive Publication Date: 2007-04-04
张夙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to significantly reduce the production cost of bismuth vanadate pigment

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0012] In a 250ml beaker, weigh 5g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 5 ml of 65% nitric acid, and stirred with 50 ml of water to obtain a clear solution. Take another 50ml beaker and weigh 1.6g of NH 4 VO 3 , drop 3 milliliters of 80% phosphoric acid, add water to 50 milliliters, stir and heat to dissolve, and obtain a reddish-brown solution. Will NH 4 VO 3 The solution was slowly added to the bismuth nitrate solution. Add water to 250 ml and heat to above 90°C. Put 18 grams of gamma-alumina solids into the solution, keep the pH of the reaction solution below 1, and react for 2 hours. The pH was gradually adjusted to 7 with NaOH. Continue heating to keep the temperature above 90°C, and reflux for 3 hours. The precipitate was washed twice with water at room temperature, and dried by suction filtration. Dry the precipitate at 130°C, put it into a crucible and place it in a muffle furnace, and burn it at 650°C for 5 hours. Obtain 17.2 grams of dark yellow pigment c...

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PUM

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Abstract

Production of coated bismite vanadic acid is carried out by adding into one or several kind inorganic compound filler and coating yellow pigment onto filler. The chemical formula is BiVO4.nBi2AO6, A is Mo or W, n is 0-2; PH value of reactive liquid is controlled <=1. It's cheap and efficient.

Description

technical field [0001] The invention belongs to the technical field of manufacturing inorganic pigments. Background of the invention [0002] Bismuth vanadate yellow pigment is a high-performance, non-toxic yellow inorganic pigment, and it is the most likely substitute for lead-containing chromium pigments and some high-priced organic yellow pigments. In the case of increasingly stringent environmental protection laws and regulations in various countries, its intrinsic value has become more prominent. In the patents of various countries, the manufacturing methods of the pigment can be summarized into those with molybdenum or tungsten added and those without. Among them, molybdenum or tungsten are mainly 4026722, 4115141, 5203917, 5273577, 5753028. There are 4272296, 4455174, 4752460, 4937063, 4851094, 5336312, 5399197, 5536309, 5753028, etc. that involve no molybdenum or tungsten, but bismuth vanadate single-phase pigments. [0003] As for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06
Inventor 张夙
Owner 张夙
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