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Process for the preparation of iron blue

A technology of iron blue and formula, applied in the direction of fibrous fillers, etc., can solve problems such as product quality impact, and achieve the effect of simplifying the production process, less equipment, and shortening the process

Inactive Publication Date: 2006-04-19
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing industrial production method, it is necessary to make white pulp first, then adjust the acidity and oxidize the process. If the white pulp is not uniform or the acidity is not adjusted properly or the oxidation is incomplete, it will have a great impact on the quality of the product.

Method used

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  • Process for the preparation of iron blue

Examples

Experimental program
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Effect test

example 1

[0022] Example 1: Weigh 4.04g ferric nitrate nonahydrate and 4.22g potassium hexacyanoferrous ferrite trihydrate, mix and grind evenly, then add 250ml distilled water to dissolve, let stand at room temperature for 3 days, filter, discard the filtrate, and remove the precipitate After drying, 2.98 g of iron blue was obtained with a yield of 96.94%. Its technological process is:

[0023]

example 2

[0024] Example 2: Weigh 3.03g ferric nitrate nonahydrate and 4.22g potassium hexacyanoferrous ferrite trihydrate, mix and grind evenly, then add 250ml distilled water to dissolve, leave at room temperature for 2 days, filter, discard the filtrate, and remove the precipitate After drying, 2.34 g of iron blue was obtained with a yield of 93.31%.

example 3

[0025] Example 3: Weigh 4.04g ferric nitrate nonahydrate and 3.16g potassium hexacyanoferrous ferrite trihydrate, mix and grind evenly, then add 250ml distilled water to dissolve, let stand at room temperature for 1 day, filter, discard the filtrate, and remove the resulting precipitate After drying, 2.00 g of iron blue was obtained with a yield of 87.08%.

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PUM

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Abstract

The invention discloses a process for the preparation of iron blue by using ferric nitrate, hexacyanoferrate (II) as raw material, through grinding, water scrubbing, stewing, filtering, abandoning filter liquor, and drying the blue deposition.

Description

Technical field: [0001] The invention relates to a method for preparing an iron compound, in particular to a method for preparing iron blue. Background technique: [0002] Iron blue, also known as Prussian blue or Chinese blue. Iron blue is mainly used in paint, ink and paper, and can also be used as a pigment for crayons, watercolors and oil paints, etc. It has a wide range of applications in industry. It is generally believed that its main component is hexacyanoferrate (II) iron (III) Fe 4 [Fe(CN) 6 ] 3 ·xH 2 O. The iron in the cation can be partially replaced by alkali metal or ammonium ions. The industrial production of iron blue is to use divalent iron salt and potassium ferrocyanide to make the white slurry of the precipitate, and then oxidize the precipitate in an acidic medium. [0003] <chemistry num="001"> <chem file="200410012417_cml001.xml" / > < / chemistry> [0004] <chemistry num="002"> <chem file="200410012417_cml002.xml" ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/26
Inventor 杨柳董文娟董川
Owner SHANXI UNIV
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