Method for preparing ferriferrous oxide black pigment

A technology of ferric oxide and ferrous hydroxide, which is applied in the direction of ferric oxide/ferric hydroxide, oxides of ferrous iron, fibrous fillers, etc., can solve the problems of poor dispersion, single product variety, narrow chromatogram, etc. To achieve the effect of short production cycle and low production cost

Inactive Publication Date: 2006-07-26
SHANGHAI YIPIN PIGMENTS CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Many patents are from the perspective of comprehensive utilization, as described in Chinese patent 93119424.5, but the products obtained are single in variety, poor in dispersibility, and unsatisfactory in coloring power
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Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) Preparation of ferrous sulfate solution: add 12000 kilograms of ferrous sulfate to 2 times by weight of water to dissolve, then add 360 kilograms of iron sheet, react at 80 ℃ until the reduction of ferric iron in the solution is complete, add sulfuric acid in the process, Keep the pH at 3.5. After the reaction is over, add water to adjust the concentration of ferrous sulfate ion to 100g / L, add 6 kg of flocculant polyaluminum sulfate to the solution, filter, and collect the filtrate, which is the ferrous sulfate solution. The residue is recovered and concentrated Deal with up-to-standard discharge;

[0020] (2) Preparation of ferrous hydroxide: add water in the ferrous sulfate salt solution of step (1), make ferrous ion concentration control at 100g / L, add weight concentration then and be 30% sodium hydroxide solution neutralization Until adopting potassium ferricyanide to detect that there is no ferrous sulfate ion in the solution, the pH value is 8, and the ferrous...

Embodiment 2

[0024] (1) Preparation of ferrous sulfate solution: add 12,000 kg of ferrous sulfate to 3 times the weight of water to dissolve, then add 360 kg of reduced iron powder, react at 90°C until the ferric iron in the solution is completely reduced, and add Sulfuric acid to keep the pH at 3.5. After the reaction is over, add water to adjust the concentration of ferrous sulfate ions to 70g / L, add 6 kg of flocculant modified polyacrylamide, filter, and collect the filtrate, which is ferrous sulfate solution. Recycling and centralized treatment of up-to-standard emissions;

[0025] (2) Preparation of ferrous hydroxide: Add ammonia to the ferrous sulfate solution of step (1) and neutralize to adopt potassium ferricyanide detection solution without ferrous sulfate ion, pH value is 6, obtains ferrous hydroxide Solution, adding water before neutralizing ferrous ion concentration is controlled at 70g / L:

[0026] (3) Preparation of ferroferric oxide: 1500 kilograms of ammonium nitrate is ad...

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Abstract

The invention discloses a preparation method for Fe3O4 as black paint, which comprises preparing the FeSO4 solution, Fe(OH)2 and Fe3O4 by turns. With USA datacolor color photometer, CIE standard and D65 standard light source, the YP/TD/S-01 testing shows the product comes up to the index completely. Compared with prior art, this invention has short production period and small limit to material; the product has wide product color spectrum range to meet wide market application request with low cost.

Description

technical field [0001] The present invention relates to a method for preparing iron oxide black pigments. Background technique [0002] The molecular formula of iron oxide black is Fe 3 o 4 . Widely used in concrete, paint, rubber, ink, ceramics and other fields. The more traditional production process is the high-temperature addition reaction between the recycled waste water produced by iron red and iron yellow and the prepared ferric hydroxide gel. However, the coloring power of the obtained product is low, the hue is difficult to adjust, the color stability of the obtained product is poor, and a large number of physical color matching processes in the later stage are often required, which consumes energy and time. At the same time, with the continuous shortage of resources, the raw materials for this method are getting less and less, and iron red and iron yellow manufacturers are constantly striving to reduce unit consumption. A lot of patents are out of the angle of...

Claims

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Application Information

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IPC IPC(8): C01G49/08C09C1/24
Inventor 顾加强
Owner SHANGHAI YIPIN PIGMENTS CO LTD
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