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Method for lowering viscosity of iron trioxide

A ferric oxide and viscosity technology, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc. The effect of viscosity reduction

Inactive Publication Date: 2018-05-18
HAIAN KEHAO TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The disadvantage of the above method is that when the surface of the 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 metal ions of the pigment exceed the standard. , which more or less affects other performance, and the use occasions will be subject to certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a stainless steel reaction tank 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 put 600 grams (dry basis) of the ferric oxide 313 filter cake material directly produced in the industry in batches Add it to form a slurry, continue to add water to control the slurry concentration at about 12%, and raise the temperature of the feed liquid to 70-75 degrees and keep it, then slowly add 10% concentration of dilute alkali to control the pH at 9.0- Between 9.5, 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 comparison of viscosity...

Embodiment 2

[0028] 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:

[0029] Table 2:

[0030] The filter cake material of ferric oxide 313# before treatment is directly dried and pulverized as a standard sample, and the color and shade of the test are:

[0031] PH value

Stiring time

Yellowness value (Δb)

Viscosity (KU)

7.0～7.5

3.5h

0.12

120.2

7.5～8.0

3.5h

0.17

118.6

8.0～8.5

3.5h

0.23

105.1

8.5～9.0

3.5h

0.18

94.8

9.0～9.5

3.5h

0.11

87.7

9.5～10.0

3.5h

-0.32

85.8

10.0～10.5

3.5h

-0.76

84.7

10.5～11.0

3.5h

-1.28

84.2

11.0～11.5

3.5h

-1.79

83...

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PUM

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Abstract

The invention discloses a method for lowering the viscosity of iron trioxide. The method comprises the steps that industrial grade iron trioxide filter cakes are subjected to water adding, beating anddispersing, iron trioxide and water are added into a reaction barrel to form slurry with the concentration being 10-14%, the temperature is controlled to 70-85 DEG C, then, alkali liquor is added, the pH value of the material solution is controlled to 9.0-9.5, and high-speed stirring is performed for 3.5-4 h. The method is simple and convenient to implement, the viscosity of iron trioxide can berapidly lowered without adding any metal ion or oxide, and the viscosity of iron trioxide can be lowered by 30-34 KU.

Description

technical field [0001] The invention relates to a method for treating ferric oxide, in particular to a method for reducing the viscosity of ferric oxide by controlling certain slurry concentration, pH value, temperature, stirring speed and stirring time. Background technique [0002] Ferric oxide, also known as hydroxy iron or iron yellow for short, is an oxide with relatively stable chemical properties. 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 of 6-7 grades, insoluble in alkali, slightly soluble in acid. Ferric oxide is widely used in building materials, coatings, paints, plastics, rubber, electronic materials, industrial catalysts, tobacco, cosmetics and other industries. [0003] In industry, most domestic manufacturers currently use the iron...

Claims

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Application Information

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IPC IPC(8): C09C1/24C09C3/04C09C3/06
CPCC09C1/24C01P2006/22C09C3/006C09C3/04C09C3/043C09C3/06
Inventor 李玉清
Owner HAIAN KEHAO TEXTILE CO LTD
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