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A technology of iron oxide black and production method, applied in the direction of fibrous fillers, etc., can solve the problems of inconsistent shape of primary particles of iron black products, low color saturation and tinting strength, large particle size, etc., and achieves strong tinting strength, The effect of fine and uniform particle size and high purity
Active Publication Date: 2005-12-21
HUBEI WANRUN NEW ENERGY TECH DEV
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Problems solved by technology
The existing technology generally uses the direct addition method, that is, using the leftovers from the production of iron red or iron yellow as raw materials, adding and dehydrating under certain process conditions to form iron black. The disadvantage of this process is that the obtained iron black product primary particles The shape is inconsistent, the particle size i
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Embodiment 1
[0022] The method for producing blue-phase iron oxide black pigment in this example is:
[0023] 1. Put the waste residue containing ferrous sulfate discharged from the production of titanium dioxide into the dissolution tank, heat it with steam, and after fully dissolving, let it settle and take the upper clear liquid to make ferrous sulfate with a concentration of 45% Aqueous solution 2000Kg, put into the reaction vessel;
[0024] 2. While stirring, add about 865Kg of 30% liquid caustic soda as a neutralizing agent into the ferrous sulfate aqueous solution to generate ferrous hydroxide, and the pH value of the system is 8.5;
[0025] 3. Pump the prepared ferrous hydroxide into a 5000L reaction tank, use steam to control the temperature at 95°C, the pH value at about 8.5, and the flow rate is 0.3m while stirring. 3 / min of air, the oxidation reaction produces iron black;
[0026] The reaction formula of above-mentioned 2,3 steps is:
[0027]
[0028]
[0029]...
Embodiment 2 Embodiment 3
[0036] Example 2 Example 3 Example 4
[0037] Ferrous salt solution (concentration) 30% 40% 50%
[0042] The product that embodiment 2-4 produces all can obtain substantially identical effect with embodiment 1.
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Abstract
This is the producing method of a kind of oxidized iron oxide black including following contents: prepare ferrite watery solution; use sodium hydroxide as neutralizaing agent and react with ferrite watery solution to produce hydroxide ferrous; use oxygenous gas as oxidant, and react with said hydroxide ferrous to produce iron oxide black; make the prepared iron oxide black water washed, sieved, dried and comminuted orderly to get blue oxidized iron oxide black pigment product. The oxidized iron oxide black produced by this method has high purity and thin crystal grain, the grain size of produced pigment is thin and even, and has saturated blue ink light black and stable effect to light and atmosphere. It also has strong pigmentation strength and hiding power, and can be used in such fine chemical industry products as printing ink and carbon powder. The farther project is using waste residue containing ferrous sulfate and vented in titanium oxide powder production, to produce ferrous sulfate watery solution and produce oxidized iron oxide black, which can adequately use industry waste material to produce oxidized iron oxide black products of high quality, and reduce environmental pollution.
Description
technical field [0001] The invention belongs to a production method of a pigment, in particular to a production method of iron oxide black. Background technique [0002] Iron oxide black is referred to as iron black, and its molecular formula is Fe 3 o 4 , or Fe 2 o 3 .FeO, the chemical name is ferric oxide, which belongs to spinel type, and can also be called ferrous ferrite Structural representation. [0003] Iron oxide black is widely used in paint coatings, building materials, cement industry coloring and other fields due to its strong hiding power, tinting power and good light resistance. In addition, it is also widely used in ink, printing, plastic coloring, polishing and metal flaw detection and other fields. The existing technology generally uses the direct addition method, that is, using the leftovers from the production of iron red or iron yellow as raw materials, adding and dehydrating under certain process conditions to form iron black. The disadvantage of ...
Claims
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