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Iron oxide yellow viscosity reduction method

An iron oxide yellow and viscosity technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., can solve the problems of limited use occasions, affect the performance of use, excessive heavy metal ions, etc., to broaden the application field, product viscosity reduced effect

Inactive Publication Date: 2013-09-18
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

[0015] The disadvantage of the above method is that when the surface of iron yellow is treated with an inorganic charge modifier, a low concentration of transition metal ions is added. Although it is reported that there is no color shift phenomenon, this will make the heavy metals in the pigment The ions exceed the standard, which more or less affects other performance, and the use occasions will be limited

Method used

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  • Iron oxide yellow viscosity reduction method
  • Iron oxide yellow viscosity reduction method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In a stainless steel reaction barrel with a volume of 10 liters, add about 3 liters of tap water in advance, and then turn on the strong agitator for stirring, and then add 600 grams (dry basis) of iron oxide yellow 313 filter cake material directly produced in the industry in batches , to form a slurry, continue to add water to control the concentration of the slurry at about 12%, and raise the temperature of the material liquid to 70-75 degrees and keep it, and then slowly add 10% concentration of dilute alkali to control the pH at 9.0-9.5 In between, control the stirring speed at 350-400 rpm. After stirring for 1 hour, start to take out a small amount of sample (about 10 grams) for analysis and testing, then continue stirring, and then take samples every 1 hour. The sample taken out was filtered and rinsed up to the standard, and the filter cake was placed in an oven at 110°C for drying, and then pulverized by a micro pulverizer for analysis and testing. The comparis...

Embodiment 2

[0029] Under the condition that the other conditions of Example 1 were constant, the different pH values ​​of the reaction solution were controlled respectively, and after stirring for 3.5 hours, the samples were taken out for analysis and testing. The effect of PH value on the yellow tone (yellowness value) and viscosity of iron yellow pigment is as follows:

[0030] Table 2:

[0031] The iron oxide yellow 313# filter cake material before treatment is directly dried and crushed as a standard sample, and the color and shade of the test are:

[0032]

[0033] It can be seen from Table 2 that, under the condition that other conditions remain unchanged, with the continuous increase of the pH of the reaction system, the viscosity value of Tiehuang 313# gradually decreases, and the decrease is most obvious when the pH is 9.0 to 9.5; when the pH When the value is greater than 9.5, the viscosity value of iron oxide yellow decreases more and more slowly as the pH value continues t...

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Abstract

The invention discloses an iron oxide yellow viscosity reduction method. The method comprise the steps of: adding water into industrial-grade iron oxide yellow filter cakes to pulp and disperse, adding the iron oxide yellow and the water into a reaction barrel to form a10-14% pulp, controlling the temperature to be 70-85 DEG C, then adding an alkaline liquor to control the PH value of the pulp to be 9.0-9.5, and stirring for 3.5-4 hours at high speed. The method is simple and convenient, the iron oxide yellow can be quickly reduced without metal ions or oxides addition, and the iron oxide yellow viscosity can be reduced by 30-34KU.

Description

[0001] technical field [0002] The invention relates to a method for treating iron oxide yellow, in particular to a method for reducing the viscosity of iron oxide yellow by controlling certain slurry concentration, pH value, temperature, stirring speed and stirring time. Background technique [0003] Iron oxide yellow, also known as hydroxyl iron or iron yellow for short, 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 coloring power, non-toxic, light resistance up to 6~7 grades, insoluble in alkali, slightly soluble in acid. Iron oxide yellow is widely used in building materials, coatings, paints, plastics, rubber, electronic materials, industrial catalysts, tobacco, cosmetics and other industries. [0004] In industry, most domestic manufacturers currently use t...

Claims

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Application Information

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IPC IPC(8): C09C1/24C09C3/04C09C3/06
Inventor 邵玉详屈庆文
Owner 南通宝聚颜料有限公司
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