Environment-friendly titanium pigment prepared by using complexation-precipitation process

A titanium-based pigment and process technology, applied in the field of powder metallurgy preparation, can solve the problems of liquid-phase method agglomeration, low yield, affecting color development, etc., achieve the effects of narrow particle size distribution range, reduce production cost, and simplify production process

Active Publication Date: 2014-03-05
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common disadvantage of the liquid phase method is that it is easy to cause agglomeration problems during the preparation process and affect the color development. At the same time, due to the complicated process, the product stability is not easy to control, the yield is low, and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Add 82g of titanium dioxide and 15g of antimony trioxide into 970ml of water, 16g of nickel nitrate into 160ml of water, and clarify the nickel nitrate solution for later use;

[0049] 2) Weigh 0.3g of sodium hexametaphosphate solution, add it into the titanium dioxide mixture, and disperse it for 0.5h;

[0050] 3) Add the dissolved nickel nitrate solution in step 2), and stir for 10-30min;

[0051] 4) Add 0.2g of complexing agent---triethylenetetramine into the dissolved nickel nitrate solution, control the molar ratio of nickel nitrate to triethylenetetramine between 0.5-2, and control the pH value of the system at 6 Between -8, the temperature of the reaction system is raised to 50-70°C, the stirring rate is controlled at 400-600r\min, and the processing time is 0.5h-4h;

[0052] 5) Slowly add the prepared sodium hydroxide clarified solution with a concentration of 0.5-2mol\L into the nickel nitrate solution in step 4) and control the dropping rate to 10ml / min. A...

Embodiment 2

[0056] 1) Add 75g of titanium dioxide and 10g of antimony trioxide into 850ml of water, 15g of chromium nitrate into 150ml of water, and clarify the chromium nitrate solution for later use;

[0057] 2) Weigh the sodium hexametaphosphate solution with a weight of 0.25g of titanium dioxide, add it into the mixture of titanium dioxide, and disperse it for 0.5h;

[0058] 3) Add the dissolved chromium nitrate solution in step 2), and stir for 10-30min;

[0059] 4) Add 0.4g of complexing agent --- citric acid into the dissolved chromium nitrate solution, the molar ratio of chromium nitrate and citric acid is controlled between 0.5-2, and the pH value of the system is controlled between 6-8 During this period, the temperature of the reaction system is raised to 50-70°C, the stirring rate is controlled at 400-600r / min, and the processing time is 0.5h-4h;

[0060] 5) Slowly add the prepared potassium hydroxide clarified solution with a concentration of 0.5-2mol\L into the chromium nit...

Embodiment 3

[0064] 1) Add 70g of titanium dioxide to 700ml of water, add 10g of nickel nitrate, 15g of cobalt nitrate, and 5g of zinc nitrate into 300ml of water, and clarify the solutions of nickel nitrate, cobalt nitrate, and zinc nitrate for later use;

[0065] 2) Weigh the sodium hexametaphosphate solution with a weight of 0.35g of titanium dioxide, add it into the mixture of titanium dioxide, and disperse it for 0.5h;

[0066] 3) Add dissolved nickel nitrate, cobalt nitrate and zinc nitrate solution in step 2), and stir for 10-30min;

[0067] 4) Add 0.7g of complexing agent --- triethylenetetramine and citric acid (ratio 1:1) into the dissolved nickel nitrate, cobalt nitrate and zinc nitrate solution, nickel nitrate, cobalt nitrate and zinc nitrate and The molar ratio of triethylenetetramine and citric acid is controlled between 0.5-2, the pH value of the system is controlled between 6-8, the temperature of the reaction system is raised to 50-70°C, and the stirring rate is controlled...

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Abstract

The invention discloses environment-friendly titanium pigment prepared by using a complexation-precipitation process. The process comprises the following steps: quantitatively weighing titanium dioxide or titanium dioxide and antimonous oxide to be added into a solution into which a surfactant is dissolved, and dispersing uniformly; adding a mixture solution of coloring ions R<+1> and a complexing agent, controlling the contents of the complexing agent and the coloring ions so as to establish a stable system of the coloring irons and the complexing agent, adjusting the pH value of the system and enabling the system to be in a stable state; performing precipitation reaction on the coloring ions and an dropped alkali solution; aging and subsequently washing and filtering the reaction system so as to remove impurity ions; performing spraying drying treatment; adding a mineralizer into the dry powder, uniformly mixing, subsequently calcining in air atmosphere in a muffle furnace, and controlling the temperature and the temperature preserving time so as to obtain expected powder. The pigment overcomes the defects that in the conventional titanium yellow preparation, the particle size of the pigment is large, the distribution interval is wide, the color is not bright, agglomeration happens, the coloring capability is poor, and the like, and the cost of the titanium pigment is greatly lower than that of a developed product in market.

Description

technical field [0001] The invention relates to the field of powder metallurgy preparation, in particular to an environment-friendly titanium pigment prepared by a complexation-precipitation process. Background technique [0002] The problem of environmental pollution has attracted more and more attention from the international community. The promotion of green and environmentally friendly products and the strengthening of energy conservation and emission reduction are important means to deal with the deteriorating environment and resource shortage. Inorganic pigments containing lead and cadmium occupy a large part of the market due to their bright color and low price. However, out of consideration for policies and environmental protection and health, seeking safe, non-toxic and harmless environmentally friendly pigments has become a popular choice for people. a consensus. [0003] With the continuous expansion of the application field of inorganic pigments, higher requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08
Inventor 王晓伟陈建军梁梦林陈安明叶立强彭伟明袁凯杰张嘉敏
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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