CN102502865B - Preparation method of iron oxide brown - Google Patents
Preparation method of iron oxide brown Download PDFInfo
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- CN102502865B CN102502865B CN201110305235.8A CN201110305235A CN102502865B CN 102502865 B CN102502865 B CN 102502865B CN 201110305235 A CN201110305235 A CN 201110305235A CN 102502865 B CN102502865 B CN 102502865B
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- CN
- China
- Prior art keywords
- iron oxide
- brown
- product
- slip
- oxygen
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Abstract
The invention discloses a preparation method of iron oxide brown, comprising the following steps of: adding ferrous sulfate and liquid caustic soda into a closed reaction kettle to be mixed to form a material slurry; adding water to adjust the concentration of the material slurry to 10-12%; raising a temperature to a value in a range of 80-85 DEG C and then slowly adding sodium nitrite while introducing oxygen, then starting spraying equipment to sufficiently mix the material slurry, the oxygen and NO which is generated in a reaction process; continuously sampling in the reaction process and comparing with a standard sample; stopping the reaction after the color light of a product is approximate to that of the standard sample; and carrying out filter pressing on the fetched material slurry, washing, drying and crushing to obtain the product. Iron oxide brown produced by the method of the invention has the advantages of stable quality, pure color light, simple synthesis method and convenience for operation.
Description
Technical field
The present invention relates to the production method of a kind of cologne earth, is exactly a kind of preparation method of iron oxide brown.
Background technology
The molecular formula of iron oxide brown is (Fe
2o
3+ FeO) nH
2o, it is a kind of brown ceramic powder, and water insoluble, alcohol, ether, be dissolved in hot strong acid, and tinting strength and opacifying power are very high simultaneously, and photostabilization, alkali resistance are good, anhydrous oozing property and oozing property of oil.Its form and aspect are with the difference of technique, are divided into yellowish-brown, reddish brown, black palm fibre etc.It is widely used in the painted of painted and coating, building, rubber, plastics of the goods such as paint, ink, plastics, shoe powder etc.
Traditional iron oxide brown is by forming by iron oxide black, iron oxide yellow and three kinds of pigment physics blendings of iron oxide red, and quality product shakiness exists the deficiency of form and aspect inequality, so directly synthesize the product that cologne earth product is better than physical mixed in performance
Summary of the invention
The object of the invention is for a kind of color is provided is yellowish-brown and reddish-brown, has the preparation method of the iron oxide brown of good tinting strength, form and aspect and stability.
Technical scheme of the present invention is as follows:
A preparation method for iron oxide brown, is characterized in that: comprise the following steps:
(1), the copperas solution that is 38-42% by concentration in reactor and concentration is 40-45% liquid caustic soda is 1 in mass ratio: 0.25-0.3 is mixed into slip, and adds water the concentration adjustment of slip to 10-12%, is warmed up to 80-85 DEG C;
(2), the ratio that drops into 30-40KG in product per ton slowly adds Sodium Nitrite in reactor, passes into oxygen simultaneously, rear unlatching sprinkling equipment fully mixes the NO of the generation in slip, oxygen and reaction process;
(3), in reaction process, constantly sampling and standard model comparison, the standard model coloured light of product coloured light and yellowish-brown or reddish-brown coloured light is similar to stopped reaction afterwards, the slip of taking-up is obtained after filter press, washing, oven dry, fragmentation to product.
The preparation method of described iron oxide brown, is characterized in that: the pressure that passes into of oxygen is 15-20cm water column.
Principle equation of the present invention:
FeSO
4+2NaOH＝Fe(OH)
2↓+Na
2SO
4；
NaNO
2+Fe(OH)
2+H
2O＝Fe(OH)
3+NaOH+NO；
2NO+O
2＝2NO
2；
3NO
2+H
2O＝2HNO
3+NO；
HNO
3+3Fe(OH)
2+H
2O＝3Fe(OH)
3+NO；
2Fe(OH)
3＝Fe
2O
3+3H
2O。
Beneficial effect of the present invention is:
The iron oxide brown that the present invention produces is reddish brown and pale brown two kinds, compared with the cologne earth of iron oxide red tradition for, iron oxide black, iron oxide yellow physics blending one-tenth, and the cologne earth steady quality of the inventive method production, coloured light is pure and synthetic method is simple, easy to operate.
Embodiment
A preparation method for iron oxide brown, is characterized in that: comprise the following steps:
(1), the copperas solution that is 38-42% by concentration in reactor and concentration is 40-45% liquid caustic soda is 1 in mass ratio: 0.25-0.3 is mixed into slip, and adds water the concentration adjustment of slip to 10-12%, is warmed up to 80-85 DEG C;
(2), the ratio that drops into 36KG in product per ton slowly adds Sodium Nitrite, passes into oxygen simultaneously, rear unlatching sprinkling equipment fully mixes the NO of the generation in slip, oxygen and reaction process;
(3), in reaction process, constantly sampling and standard model comparison, the standard model coloured light of product coloured light and yellowish-brown or reddish-brown coloured light is similar to stopped reaction afterwards, the slip of taking-up is obtained after filter press, washing, oven dry, fragmentation to product.
The preparation method of described iron oxide brown, is characterized in that: the pressure that passes into of oxygen is 15-20cm water column.
The detected result table of product of the present invention
The iron oxide brown that the present invention produces is reddish brown and pale brown two kinds, compared with the cologne earth of iron oxide red tradition for, iron oxide black, iron oxide yellow physics blending one-tenth, and the cologne earth steady quality of the inventive method production, coloured light is pure and synthetic method is simple, easy to operate.
Claims (1)
1. a preparation method for iron oxide brown, is characterized in that: comprise the following steps:
(1), the copperas solution that is 38-42% by concentration in reactor and the concentration liquid caustic soda that is 40-45% is in mass ratio for 1:0.25-0.3 is mixed into slip, and adds water the concentration adjustment of slip to 10-12%, is warmed up to 80-85 DEG C;
(2), in reactor, slowly add Sodium Nitrite in the ratio of product input 30-40KG per ton, pass into oxygen simultaneously, the pressure that passes into of oxygen is 15-20cm water column, and rear unlatching sprinkling equipment fully mixes the NO of the generation in slip, oxygen and reaction process;
(3), in reaction process, constantly sampling and standard model comparison, the standard model coloured light of product coloured light and yellowish-brown or reddish-brown coloured light is similar to stopped reaction afterwards, the slip of taking-up is obtained after filter press, washing, oven dry, fragmentation to product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305235.8A CN102502865B (en) | 2011-10-11 | 2011-10-11 | Preparation method of iron oxide brown |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305235.8A CN102502865B (en) | 2011-10-11 | 2011-10-11 | Preparation method of iron oxide brown |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102502865A CN102502865A (en) | 2012-06-20 |
| CN102502865B true CN102502865B (en) | 2014-06-25 |
Family
ID=46215016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110305235.8A Expired - Fee Related CN102502865B (en) | 2011-10-11 | 2011-10-11 | Preparation method of iron oxide brown |
Country Status (1)
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| CN (1) | CN102502865B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318971B (en) * | 2013-06-25 | 2015-02-04 | 升华集团德清华源颜料有限公司 | Liquid-phase low-heavy-metal iron oxide brown |
| CN103318967B (en) * | 2013-06-25 | 2015-02-04 | 升华集团德清华源颜料有限公司 | Method for preparing liquid-phase low-heavy-metal iron oxide brown |
| CN107638567B (en) * | 2017-09-21 | 2020-10-27 | 深圳大学 | Metal Lawsonia inermis black salt and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3974267A (en) * | 1975-04-24 | 1976-08-10 | Cities Service Company | Manufacture of iron oxides |
| EP0704499B1 (en) * | 1994-09-30 | 1998-09-09 | Bayer Ag | Highly transparent, yellow iron oxide pigments, process for their preparation and their use |
| CN101381109A (en) * | 2008-10-24 | 2009-03-11 | 天津大学 | Method for preparing spherical Fe3O4 nano powder |
| CN101469156A (en) * | 2007-12-24 | 2009-07-01 | 深圳市海川实业股份有限公司 | Environment friendly transparent iron oxide brown superfine aqueous color sizing dispersion and preparation thereof |
-
2011
- 2011-10-11 CN CN201110305235.8A patent/CN102502865B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3974267A (en) * | 1975-04-24 | 1976-08-10 | Cities Service Company | Manufacture of iron oxides |
| EP0704499B1 (en) * | 1994-09-30 | 1998-09-09 | Bayer Ag | Highly transparent, yellow iron oxide pigments, process for their preparation and their use |
| CN101469156A (en) * | 2007-12-24 | 2009-07-01 | 深圳市海川实业股份有限公司 | Environment friendly transparent iron oxide brown superfine aqueous color sizing dispersion and preparation thereof |
| CN101381109A (en) * | 2008-10-24 | 2009-03-11 | 天津大学 | Method for preparing spherical Fe3O4 nano powder |
Non-Patent Citations (2)
| Title |
|---|
| 李省云等.氧化铁黄生产的最佳条件.《山西化工》.1993,(第1期),33-36页. |
| 氧化铁黄生产的最佳条件;李省云等;《山西化工》;19931231(第1期);第35-36页 * |
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|---|---|
| CN102502865A (en) | 2012-06-20 |
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