CN103421356B - Preparation method of rare earth modified iron oxide black - Google Patents
Preparation method of rare earth modified iron oxide black Download PDFInfo
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- CN103421356B CN103421356B CN201310318362.0A CN201310318362A CN103421356B CN 103421356 B CN103421356 B CN 103421356B CN 201310318362 A CN201310318362 A CN 201310318362A CN 103421356 B CN103421356 B CN 103421356B
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- iron oxide
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Abstract
The invention discloses a preparation method of rare earth modified iron oxide black. The preparation method comprises the following steps: iron oxide black prepared by adopting a sodium hydroxide oxidation method is adopted; an iron oxide black filter cake which is not dried is used directly; neodymium oxide and lanthanum oxide are added, wherein the weight of neodymium oxide is 0.2% to 0.3% of that of the iron oxide black filter cake, and the weigh of the lanthanum oxide is 1% to 2% of that of the iron oxide black filter cake; high-speed grinding is performed at 2000 to 3000 rpm for 10 to 15 minutes; moderate water is added, and pulping is performed for 20 to 30 minutes, so that pulp liquid with the concentration of 50% to 60% is prepared; triethanolamin, sodium lignin sulfonate and beryllium oxide are added, wherein the weight of the triethanolamin is 0.4% to 0.6% of that of the pulp liquid, the weight of sodium lignin sulfonate is 0.2% to 0.3% of that of the pulp liquid, and the weight of the beryllium oxide is 0.3% to 0.5% of that of the pulp liquid, stirring is performed for 30 to 40 minutes; then the pulp is grinded to that the grain diameter is less than 50 Mum through a colloid mill, so that rare earth modified iron oxide black is obtained after drying and powdering. According to the invention, a part of neodymium oxide and the lanthanum oxide are added into the iron oxide black for grinding, the gloss is increased, and the membrane surface crack is reduced during iron oxide black film formation.
Description
Technical field
The present invention relates to a kind of preparation method of rare earth modified iron oxide black, belong to chemical color field.
Background technology
Iron pigment is as important inorganic color(ed)pigment, and its annual production occupies first of inorganic color(ed)pigment.Due to the reinforcement of world's environmental consciousness, the features such as inorganic iron series pigments is nontoxic with it, odorless, pollution-free constantly replace pigment dyestuff and the plumbous series such as red lead, lead-chrome yellow, the serial poisonous mineral dye of chromium.Iron oxide black due to chemical composition simple, nontoxic pollution-free, chemical stability is strong, is widely used in building trade paint.But iron oxide black will dewater when temperature reaches about 100 DEG C, oxidation becomes iron oxide red.Under the occasion that some temperature are higher, use iron oxide black, will fade, the phenomenon such as variable color, thus limit the use range of iron oxide black.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of preparation method of rare earth modified iron oxide black is provided.The iron oxide black high thermal resistance that the method is produced is good, and intensity is high, dispersed superior.
The technical solution used in the present invention is as follows:
A kind of preparation method of rare earth modified iron oxide black, adopt the iron oxide black that sodium hydroxide oxidation style is obtained, the iron oxide black filter cake that direct use is not dried, add the Neodymium trioxide being equivalent to iron oxide black filter cake weight 0.2-0.3%, the lanthanum trioxide of 1-2%, 2000-3000rpm speed lapping 10-15 minute, then appropriate water making beating 20-30 minute is added, make the slurries that concentration is 50-60%, and add the trolamine of slurry weight 0.4-0.6%, the sodium lignosulfonate of 0.2-0.3%, the beryllium oxide of 0.3-0.5%, stir 30-40 minute, 50 μm are less than again by colloidal mill defibrination to particle diameter, oven dry is beaten powder and is finished product.
Beneficial effect of the present invention:
The present invention with the addition of a part of Neodymium trioxide in iron oxide black, lanthanum trioxide grinds, and when iron oxide black film forming, increases gloss, reduces face and breaks.
The present invention adopts trolamine, sodium lignosulfonate, beryllium oxide to carry out organic coated process to iron oxide black surface, and its surface of passivation, improves the resistance toheat of iron oxide black, also improve mobility and the dispersiveness of black iron oxide pigment simultaneously with this; The iron oxide black that the present invention produces has superior heat resistance, well acidproof, the alkaline-resisting and feature such as light absorptive is strong, tinting strength is high, consistency is good, good dispersity.
Embodiment
Adopt the iron oxide black that sodium hydroxide oxidation style is obtained, the iron oxide black filter cake that direct use is not dried, add and be equivalent to the Neodymium trioxide of iron oxide black filter cake weight 0.3%, the lanthanum trioxide of 1.5%, 2500rpm speed lapping 12 minutes, then add appropriate water to pull an oar 25 minutes, make the slurries that concentration is 50%, and add trolamine, the sodium lignosulfonate of 0.3%, the beryllium oxide of 0.4% of slurry weight 0.5%, stir 30 minutes, be less than 50 μm by colloidal mill defibrination to particle diameter again, oven dry is beaten powder and is finished product.
The iron oxide black product performance analysis data that the present embodiment is produced is as following table:
| Project | Index | Detected result |
| Fe 2O 3Content (%) | ≥85 | 92.4 |
| 105 DEG C of volatile matters (%) | ≤1.0 | 0.65 |
| Oil number (%) | 15-25 | 22.8 |
| Tinctorial strength (%) | 95-105 | 98.2 |
| Resistance to 200 DEG C/30min (△ E) | ≤1.0 | 0.76 |
Claims (1)
1. the preparation method of a rare earth modified iron oxide black, it is characterized in that: adopt the iron oxide black that sodium hydroxide oxidation style is obtained, the iron oxide black filter cake that direct use is not dried, add the Neodymium trioxide being equivalent to iron oxide black filter cake weight 0.2-0.3%, the lanthanum trioxide of 1-2%, 2000-3000rpm speed lapping 10-15 minute, then appropriate water making beating 20-30 minute is added, make the slurries that concentration is 50-60%, and add the trolamine of slurry weight 0.4-0.6%, the sodium lignosulfonate of 0.2-0.3%, the beryllium oxide of 0.3-0.5%, stir 30-40 minute, 50 μm are less than again by colloidal mill defibrination to particle diameter, oven dry is beaten powder and is finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310318362.0A CN103421356B (en) | 2013-07-26 | 2013-07-26 | Preparation method of rare earth modified iron oxide black |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310318362.0A CN103421356B (en) | 2013-07-26 | 2013-07-26 | Preparation method of rare earth modified iron oxide black |
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| CN103421356A CN103421356A (en) | 2013-12-04 |
| CN103421356B true CN103421356B (en) | 2015-07-08 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104031423B (en) * | 2014-04-24 | 2015-12-02 | 安徽陵阳新材料有限公司 | A kind of preparation method of high temperature resistant cladded type iron oxide black |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1226354C (en) * | 2001-12-28 | 2005-11-09 | 中山大学 | Composite gaolinite/rare-earth/iron oxide-base nano pigment and its microwave process for synthesizing it |
| US7347893B2 (en) * | 2006-06-02 | 2008-03-25 | Iop Specialists Sdn. Bhd. | Iron oxide pigments from mill scale |
| CN101760088B (en) * | 2009-04-13 | 2012-04-18 | 昆山市世名科技开发有限公司 | Color paste for nanometer modified environmentally-friendly ferric oxide machine and preparation method thereof |
| CN101671499B (en) * | 2009-10-12 | 2012-07-25 | 沈阳化工学院 | Method for preparing ferric oxide composite pigment doped with rare earth and silicon oxide |
| CN101824236B (en) * | 2010-04-29 | 2012-10-31 | 南通宝聚颜料有限公司 | Preparation process of medium temperature resistant iron oxide black |
| CN102604434B (en) * | 2012-02-21 | 2013-11-06 | 升华集团德清华源颜料有限公司 | Preparation method of coated iron oxide black with medium temperature resistance |
| CN102604437B (en) * | 2012-02-21 | 2014-04-16 | 升华集团德清华源颜料有限公司 | Intermediate temperature-resistant coated iron oxide black and preparation method thereof |
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