Method for increasing yellow tone of iron oxide yellow

A technology of iron oxide yellow and iron oxide, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of low purity of iron yellow, rough surface and non-smooth, and achieve the improvement of product grade and quality, The effect of improving the degree of yellowness and expanding the scope of application

Inactive Publication Date: 2012-10-03
南通宝聚颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The iron oxide yellow directly produced in the industry, due to the rough and rough surface of the pigment particles, adsorption or entrainment of some fine particles, resulting in low purity of iron yellow, a bit grayish color, and poor yellow tone

Method used

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  • Method for increasing yellow tone of iron oxide yellow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Take 500g of iron oxide yellow 311 raw material directly produced in the industry, put it into the reaction tank, and add a certain amount of water to form a slurry, and control the concentration of the slurry at about 5%, add a small amount of dilute sulfuric acid to keep the pH at 2.8- 3.5, the temperature can be controlled between 80-85 °C, after stirring for 2 hours, add 1.5g of rutile titanium dioxide additive, the amount added is 0.3% of the weight of iron yellow, then continue to stir, and start to take out after stirring for 4 hours A small amount of sample is analyzed and tested, and then sampled every 1 hour. The small amount of sample taken out is rinsed with distilled water for 3 times, filtered to obtain a cake, dried in an oven at 105°C, and crushed with a miniature coffee cup. Analytical test after machine crushing. The test results are compared as shown in the table below:

[0012] Taking the raw material of iron oxide yellow before yellowing as the sta...

Embodiment 2

[0016] Under the condition that other conditions of Example 1 remained unchanged, different amounts of titanium dioxide additives were added respectively, and after stirring for 8 hours, the samples were taken out for analysis and testing. The effect of additive dosage on the yellow tone of iron yellow pigment is as follows:

[0017] Taking the iron oxide yellow 311 raw material before yellowing as the standard, the detected color light is:

[0018]

[0019] It can be seen from the above table: under the condition of other conditions unchanged, with the increase of the amount of titanium dioxide additives, the yellow phase of iron yellow 311 will gradually increase, but when the amount of additives exceeds 0.5%, that is, 1.5 grams, the iron oxide On the contrary, the yellowish tone of yellow will decrease obviously, and the color intensity will also decrease obviously, so the appropriate amount of titanium dioxide additive is about 0.3%.

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Abstract

The invention discloses a method for increasing the yellow tone of iron oxide yellow. After the iron oxide yellow directly obtained industrially is dispersed and the color is stabilized and enhanced, the iron oxide yellow is filtered, rinsed, dried and ground. The process of the method is as follows: the iron oxide yellow and water are added into a reaction bucket to form slurry with certain concentration, acid is then added to control the PH value of the slurry, stirring and reaction are carried out under a certain temperature for 2 hours, coating additive is then added, stirring and reaction are continued for 6 hours, and thereby the yellow tone Delta b can be enhanced. By technically processing the ordinary industrial iron oxide yellow and controlling certain slurry concentration, PH value, temperature, additive dosage and stirring time, the method can effectively enhance the yellow tone of the iron oxide yellow, so that the yellow degree of the ordinary iron oxide yellow directly produced industrially can be greatly increased by utilizing the simple method, consequently, the grade and quality of the product is effectively increased, and the application field range of the product is expanded.

Description

Technical field: [0001] The present invention can make the yellow tint of the iron oxide yellow obviously increase by technically processing the industrially produced common iron oxide yellow and controlling certain slurry concentration, pH value, temperature, auxiliary agent dosage and stirring time. technical background: [0002] Iron oxide yellow is a chemically stable oxide. The chemical formula is Fe 2 o 3 ·H 2 O or FeOOH, in the form of yellow powder. The color is a vivid, pure ocher yellow with shades from lemon to orange. It is a needle-shaped hydrated compound with strong hiding power, high tinting power, non-toxic and good light resistance and alkali resistance. Widely used in building materials, coatings, paints, plastics, rubber, electronic materials, tobacco, cosmetics and other industries. [0003] The wet sulfate oxidation method is widely used in industry to produce iron oxide yellow USP1327061, USP1368748. The process usually has two steps: the first ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/24C09C3/06
Inventor 邵玉详杨建明
Owner 南通宝聚颜料有限公司
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