Fire resistant black iron oxide pigment and preparation method thereof

A technology of iron oxide black and high temperature resistance, which is applied in the fields of iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc., can solve the problems of poor high temperature resistance of iron oxide black, and achieve good acid resistance and strong light absorption Effect

Active Publication Date: 2008-12-03
ZHEJIANG HUAYUAN PIGMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical defect of poor high temperature resistance of existing iron oxide black, an object of the present invention is to provide a high temperature resistant iron oxide black pigment (ferromanganese black), which can withstand high temperatures of 700 ° C or above

Method used

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  • Fire resistant black iron oxide pigment and preparation method thereof
  • Fire resistant black iron oxide pigment and preparation method thereof
  • Fire resistant black iron oxide pigment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Such as figure 1 The preparation method of the high-temperature-resistant iron oxide black pigment shown, the preparation method includes two stages of oxidation reaction and high-temperature calcination, and the specific steps are as follows:

[0035] 1. Oxidation reaction part

[0036] 1. Mixing: Put the ferrous sulfate solution into the oxidation reaction barrel, start stirring, add manganese sulfate to dissolve and mix evenly, inject tap water to dilute. Start to heat up, intermittently in the middle, raise the temperature to 95°C, turn on the stirring, and keep the temperature stable.

[0037] The molar ratio of ferrous sulfate and manganese sulfate is 4:1, the amount of water added depends on the size of the reaction tank, and the concentration of ferrous sulfate is controlled at 5g / 100ml~10g / 100ml.

[0038] 2. Alkali adjustment: When the temperature of the feed liquid in the reaction tank reaches and stabilizes at 95°C, adjust the stirring speed to 400rpm, add ...

Embodiment 2

[0045] The preparation method of the high-temperature-resistant iron oxide black pigment has the same steps as in Example 1, except that the molar ratio of ferrous sulfate to manganese sulfate is 5:1.

Embodiment 3

[0047] The preparation method of the high-temperature-resistant iron oxide black pigment has the same steps as in Example 1, except that the raw materials are ferrous chloride and manganese chloride, and the molar ratio of ferrous chloride and manganese chloride is 2:1.

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Abstract

The invention relates to an inorganic iron oxide black pigment, in particular to a heat-resistant iron oxide black pigment (manganese ferrite black) and the preparation method thereof. The heat-resistant iron oxide black pigment comprises manganese ferrite black prepared from ferroferric oxide and manganese oxide by high-temperature lattice reaction, wherein the molar ratio of iron element to manganese pigment in the pigment is 1.5:1 to 5:1. The heat-resistant iron oxide black pigment has high heat resistance up to 700 DEG C or above, and can be widely used for ceramic, engineering plastic, color sand, etc., for products manufactured at high temperature, and for coloring agent for products. Meanwhile, the inorganic iron oxide black pigment has the advantages of high acid resistance, high alkali resistance and high light absorbability.

Description

technical field [0001] The invention relates to an inorganic iron oxide black pigment, in particular to a high temperature resistant iron oxide black pigment (ferromanganese black) pigment and a preparation method thereof. Background technique [0002] Iron oxide black is referred to as iron black molecular formula, Fe 2 o 3 .FeO, the chemical name is ferric oxide, belongs to the spinel type, it has saturated blue ink light black, and the relative density is 4.73. It has high hiding power and tinting power, and is very stable to light and atmosphere. Iron oxide black will dehydrate and oxidize to iron red when the temperature reaches about 100°C. Therefore, due to the poor high temperature resistance of iron oxide black, the scope of use of iron oxide black is limited. Contents of the invention [0003] In order to solve the technical defect of poor high temperature resistance of existing iron oxide black, an object of the present invention is to provide a high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/00C01G49/06
Inventor 竺增林冯阿荣李金花叶学锋王华英
Owner ZHEJIANG HUAYUAN PIGMENT CO LTD
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