A kind of heat-resistant iron oxide yellow pigment and preparation method thereof
A technology for iron oxide yellow and pigment, which is applied in the field of heat-resistant iron oxide yellow pigment and its preparation, can solve the problems of poor thermal stability of iron oxide yellow, limitation of coloring application, etc., achieves high industrial application value, simple synthesis method and low cost low effect
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Embodiment 1
[0021] Weigh 20Kg iron oxide yellow pigment 810#, and evenly disperse iron oxide yellow in 200 L of water under stirring to form a mixed solution with iron oxide yellow content of 10%; weigh 3.35Kg zinc chloride and 2.53Kg sodium hexametaphosphate respectively , 1.64Kg sodium hydroxide, dissolved in 100 L water respectively to form solution A, solution B and solution C; 80°C, and continue to stir for 3 h after adding the solution; after pressure filtration and washing, the filter cake is dried and crushed at 90°C to obtain heat-resistant iron oxide yellow product A.
Embodiment 2
[0023] Take by weighing 10Kg iron oxide yellow pigment 810#, under stirring, iron oxide yellow is uniformly dispersed in 200 L of water to form a mixed solution with iron oxide yellow content of 5%; respectively weigh 4.65Kg zinc nitrate, 1.68Kg sodium hexametaphosphate, 1.31Kg sodium hydroxide, dissolved in 30 L water respectively to form solution A, solution B and solution C; then add solution A, solution B and solution C to the iron oxide yellow mixture under stirring, and the reaction temperature is controlled at 70 ℃, and continue to stir for 10 h after adding the solution; after pressure filtration and washing, the filter cake is dried and crushed at 100 ℃ to obtain heat-resistant iron oxide yellow product B.
Embodiment 3
[0025] Take by weighing 30Kg iron oxide yellow pigment 810#, and under stirring, iron oxide yellow is evenly dispersed in 100 L of water to form a mixed solution with iron oxide yellow content of 30%; respectively weigh 3.97Kg zinc sulfate, 2.53Kg sodium hexametaphosphate, 1.64Kg sodium hydroxide was dissolved in 80 L water respectively to form solution A, solution B and solution C; then solution A, solution B and solution C were added to the iron oxide yellow mixture under stirring, and the reaction temperature was controlled at 50 After adding the solution, continue to stir for 18 hours; after pressure filtration and washing, the filter cake is dried and crushed at 80°C to obtain heat-resistant iron oxide yellow product C.
[0026] Heat resistance test: Weigh 2g of the product, put it into a small crucible, heat it in an oven at 270°C for 0.5h, take it out and cool it, and then measure the color difference ΔE of the product on a spectrophotometer. The ΔE of heat-resistant ir...
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