Iron oxide pigment and its production method

A technology of iron oxide pigment and production method, applied in the field of chemistry, can solve the problem of high quality requirements of iron sheets

Active Publication Date: 2017-09-26
北京中金瑞丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] The present invention aims at the shortcomings of the prior art, and the present invention mainly sol

Method used

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  • Iron oxide pigment and its production method

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Experimental program
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Embodiment 1

[0078] 1) Prepare 50L of reaction liquid containing 1.0mol / L ethylenediamine, 1.5mol / L ethanolamine, 1.5mol / L sodium sulfate, 1g / L sodium lauryl sulfate, add feed grade heptahydrate sulfurous acid at 60°C 14kg of iron, use sulfuric acid to maintain the pH value of the solution between 9.0-9.5, react for 0.5 hour, and filter to obtain an iron-containing solution.

[0079] 2) Air is passed into the iron-containing solution obtained in step 1), the air temperature is controlled to be not lower than 50°C, the humidity is not lower than 50%, the ventilation rate is 50L / min, and the reaction temperature is controlled between 95-100°C. Using sulfuric acid to maintain the pH value of the solution between 9.0-9.5, the reaction time is 8 hours, filtering and washing to obtain the product iron oxide red and the reaction mother liquor.

[0080] 3) Take 20L of reaction mother liquor and add 3kg of calcium oxide, control the reaction temperature between 60-65°C, and react for 2 hours, filte...

Embodiment 2

[0083] 1) Prepare 5L of reaction solution containing 0.5mol / L alanine, 1.0mol / L histidine, 0.01mol / L cobalt sulfate catalyst, 0.01mol / L potassium chlorate oxidant, and 0.5mol / L potassium sulfate, at 90°C Add 70g of scrap iron, use potassium hydroxide to maintain the pH value of the solution between 8.0-8.5, react for 10 hours, and filter to obtain an iron-containing solution.

[0084] 2) Add 10 g of aluminum sulfate as a seed crystal additive to the iron-containing solution obtained in step 1), and pass air into it, control the air temperature not lower than 80°C, humidity not lower than 90%, ventilation rate 0.5L / min , the reaction temperature is controlled between 90-95 ° C, during which potassium hydroxide is used to maintain the pH value of the solution between 8.0-8.5, the reaction time is 6 hours, filtered and washed, and the product iron oxide yellow and the reaction mother liquor are obtained.

[0085] 3) Return the reaction mother liquor obtained in step 2) to step 1)...

Embodiment 3

[0087] 1) Prepare 500L reaction solution containing 2.0mol / L phenylalanine, 0.5mol / L ethanolamine, 1.0mol / L sodium sulfate, 0.1g / L sodium oleate, add industrial grade sulfuric acid heptahydrate at 80-85℃ 100kg of ferrous iron, use sodium hydroxide to maintain the pH value of the solution between 10.0-10.5, react for 1.0 hour, and filter to obtain an iron-containing solution.

[0088] 2) Introduce air into the iron-containing solution obtained in step 1), control the air temperature not lower than 60°C, humidity not lower than 70%, ventilation rate 800L / min, control the reaction temperature between 80-85°C, during use Sodium hydroxide maintains the pH value of the solution between 10.0-10.5, and the reaction time is 6 hours. After filtration and washing, the product iron oxide black and reaction mother liquor are obtained.

[0089] 3) Take 100L of the reaction mother liquor, add 12kg of calcium oxide with an effective content of 70% to it, control the reaction temperature betwe...

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Abstract

The invention discloses an iron oxide pigment and its production method. The method includes steps of 1) preparing reaction fluid, wherein the reaction fluid contains complexing agent and inert gas and its pH value is 7.0-13.0; adding scrap iron or ferrous compound or ferric ion compound therein; after dissolving, separating impurities to obtain iron solution; 2), charging oxygen gas in the iron solution so that the ferric ion in the iron solution is oxidized to be iron oxide yellow, iron oxide red or iron oxide black sediment; separating to obtain iron oxide pigment and reaction mother liquor, wherein the complexing agent is one or two of methylamine, ethylamine, ethylenediamine, propylene amide, ethanolamine, imidazole, diethylenetriamine, triethylenetetramine, ethylenediamine tetraacetic acid, ethylene diamine diacetate, nitrilotriacetic acid, glutamic acid, valine, histidine, proline, aspartic acid, alanine, serine, phenylalanine, arginine, threonine, glycine, lysine, asparaginate and glutamine.

Description

technical field [0001] The invention belongs to the field of chemistry, in particular to an iron oxide pigment and a production method thereof. Background technique [0002] Iron oxide pigments include iron oxide red, iron black, iron yellow, iron brown, transparent iron oxide and other pigments. Iron oxide pigments are widely used in coatings, building materials, plastics, electronics, tobacco, optical glass polishes, pharmaceuticals, advanced fine grinding materials, pet feed additives and other industries due to their many colors, wide spectrum, non-toxicity and low price . Iron oxide yellow is an important component of iron oxide pigments. [0003] At present, there are three main methods of producing iron yellow in China: wet air oxidation method, catalytic method and aniline method. [0004] 1) Wet air oxidation method [0005] Most of iron oxide yellow in my country is produced by wet air oxidation method. Among them, the wet process includes two kinds of acid me...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01G49/08C01G49/00
CPCC01G49/00C01G49/06C01G49/08
Inventor 张超任佳楠武占月
Owner 北京中金瑞丰环保科技有限公司
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