CN102140264B - Simple method for improving oil absorption value of calcined kaolin - Google Patents
Simple method for improving oil absorption value of calcined kaolin Download PDFInfo
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- CN102140264B CN102140264B CN2011100276840A CN201110027684A CN102140264B CN 102140264 B CN102140264 B CN 102140264B CN 2011100276840 A CN2011100276840 A CN 2011100276840A CN 201110027684 A CN201110027684 A CN 201110027684A CN 102140264 B CN102140264 B CN 102140264B
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- calcined kaolin
- oil
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- stirring
- sodium sulfide
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Abstract
The invention relates to a simple method for improving an oil absorption value of calcined kaolin. The simple method is characterized by comprising the following steps: stirring the calcined kaolin at room temperature; then adding sodium sulfide crystal particles, wherein the addition of the sodium sulfide crystal particles is 0.5wt%-4.0wt% of the calcined kaolin; and evenly stirring at room temperature, baking at the temperature of 25-150 DEG C, and then cooling so as to obtain the product. By using the method, the oil absorption value of the calcined kaolin is increased from 65-70ml/100g to 72.50-102.00ml/100g; and the method has the advantages of simple and convenient process, low cost, low requirement on equipment and suitability for industrial production.
Description
Technical field
The present invention relates to a kind of simple and easy method that improves oil absorption value of calcined kaolin.
Background technology
China has become second-biggest-in-the-world coating material production state and country of consumption, enters into the main flow of world's coating industry development.Calcined kaolin is widely used in coating as paint filler.The calcined kaolin that usually needs high oil-absorption(number) in the preparation of high-grade paint; The oil absorption value of calcined kaolin of China's non-modified is generally between 55ml/100g to 70ml/100g; The oil-absorption(number) of U.S.'s calcined kaolin is higher, and generally between 90ml/100g to 120ml/100g, but it costs an arm and a leg.Thereby because performance gap, China is applied to the most of dependence on import of calcined kaolin in high-grade paint field all the time.In view of the above, in order fully rationally to utilize the kaolin resource of China's super quality and competitive price, need us to launch to improving the research of oil absorption of calcined kaolin method in conjunction with enterprise.
At present, less about the research report that improves the oil absorption value of calcined kaolin method:
The Chinese patent of publication number CN 1847146A " a kind of method that improves oil absorption rate of coal-bearing kaolin " discloses a kind of method that improves oil absorption rate of coal-bearing kaolin; This method mainly is that the improvement (calcining and acidifying) through technology improves kaolinic oil number, makes the oil-absorption(number) of Coaseries kaolin increase to 58 ml/100g from 41 ml/100g.Though the kaolinic oil-absorption(number) that this method makes increases, but still can't satisfy the preparation requirement of high-grade paint, and acidification technique, also can cause certain contaminative, also increased the complicacy of producing simultaneously.
Application number is that 200910272931 patent " a kind of method that improves oil absorption of calcined kaolin " discloses a kind of method that improves oil absorption of calcined kaolin; This method can make oil absorption value of calcined kaolin be increased to 78.50～83.50ml/100g from 69～72ml/100g through under the constant temperature situation of certain temperature range, in calcined kaolin, adding Calcium Chloride Powder Anhydrous and mixing.This method has improved the oil-absorption(number) of calcined kaolin to a certain extent, but still has a segment distance with external product, and stirring heating is high to equipment requirements simultaneously, is unfavorable for suitability for industrialized production.
Application number is that 201010186609 patent " a kind of method that increases oil absorption value of calcined kaolin " discloses a kind of method that increases oil absorption value of calcined kaolin; This method can make oil absorption value of calcined kaolin increase to 72.50～102.60ml/100g from 65～70ml/100g through under the constant temperature situation of certain temperature range, in calcined kaolin, adding Magnesium Chloride Anhydrous and mixing.This method can improve the oil-absorption(number) of calcined kaolin, but it is high to equipment requirements equally, and product mixes with water that afterwards viscosity is bigger, and is unfavorable to preparing coating.
Summary of the invention
Technical problem to be solved by this invention provides a kind of simple and easy method that improves oil absorption value of calcined kaolin, and this method technology is easy, and cost is low, can significantly increase the oil-absorption(number) of calcined kaolin.
For addressing the above problem, the technical scheme that the present invention adopts is:
A kind of simple and easy method that improves oil absorption value of calcined kaolin; It is characterized in that: with the calcined kaolin stirring at normal temperature; Add the sodium sulfide crystal particle then, sodium sulfide crystal particulate add-on is 0.5%～4.0% of a calcined kaolin weight by weight, and stirring at normal temperature is even; Cure at 25～150 ℃, cooling promptly gets product again.
Press such scheme, the time of described calcined kaolin stirring at normal temperature is more than-3 minutes, is generally 3～-5 minutes.
Press such scheme, the granularity of said calcined kaolin≤50 μ m.
Press such scheme, described sodium sulfide crystal grain diameter >=40 orders.
Press such scheme, described stirring at normal temperature all is under sealed state, to carry out.Sealing is stirred and can be prevented calcined kaolin suction and sodium sulphite suction deliquescence, thereby influences the oil-absorption(number) of calcined kaolin.
Press such scheme, the described time of curing is 1 hour.
Beneficial effect of the present invention:
1. can make the oil-absorption(number) of calcined kaolin increase to 72.50～102.00ml/100g from 65～70ml/100g;
2. this method has no adverse effects to the whiteness of calcined kaolin, physicals such as water-soluble;
3. the properties-correcting agent sodium sulfide crystal of this method use is cheap and easy to get, and addition is few, and cost is low, and technology is simple, and is low for equipment requirements, is suitable for suitability for industrialized production.
Embodiment
Used calcined kaolin is the serial kaolin of white snow that Tangshan Madison kaolin Ltd is produced among the following embodiment.Oil-absorption(number) is according to State Standard of the People's Republic of China UDC 667.662.667.61: the mensuration GB 5211.15-88 of oil absorption of pigment tests.
The comparative example:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask, stir and be transferred to crucible after-3～-5 minutes, place 150 ℃ of bakings of baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour.Through test, its oil-absorption(number) is 68.50ml/100g.
Embodiment 1:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.1g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again in the crucible, place 150 ℃ of bakings of baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour.Through test, its oil-absorption(number) is 88.75ml/100g.
Embodiment 2:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.2g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again in the crucible, place 150 ℃ of bakings of baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour.Through test, its oil-absorption(number) is 93.74ml/100g.
Embodiment 3:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.3g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 150 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 96.00ml/100g.
Embodiment 4:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stir--3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.4g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 150 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 97.25ml/100g.
Embodiment 5:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.5g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 150 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 102.00ml/100g.
Embodiment 6:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.6g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 150 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 100.99ml/100g.
Embodiment 7:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stirred-3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.7g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 150 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, the oil-absorption(number) of product is 99.74ml/100g.
Embodiment 8:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stir--3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.6g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 25 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 90.50ml/100g.
Embodiment 9:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stir--3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.6g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 60 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 93.50ml/100g.
Embodiment 10:
Take by weighing calcined kaolin powder (granularity≤50 μ m) 20g in Erlenmeyer flask; Stir--3～-5 minutes; Taking by weighing sodium sulfide crystal particle (granularity>=40 orders) 0.6g then adds in the Erlenmeyer flask; Stir 7～10 minutes to stirring, be transferred to again and place the baking of 100 ℃ in baking oven to obtain higher oil-absorption(number) calcined kaolin in 1 hour in the crucible.Through test, its oil-absorption(number) is 94.10ml/100g.
Claims (2)
1. a method that improves oil absorption value of calcined kaolin is characterized in that: with the calcined kaolin stirring at normal temperature, add the sodium sulfide crystal particle then; Sodium sulfide crystal particulate add-on is 0.5%～4.0% of calcined kaolin weight by weight; Stirring at normal temperature is even, cures at 25～150 ℃ again, and cooling promptly gets product; The granularity of said calcined kaolin≤50 μ m; Described sodium sulfide crystal grain diameter>=40 orders, the time of described calcined kaolin stirring at normal temperature is more than-3 minutes, the described time of curing is 1 hour.
2. the method for raising oil absorption value of calcined kaolin according to claim 1 is characterized in that: described stirring at normal temperature step all is under sealed state, to carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100276840A CN102140264B (en) | 2011-01-26 | 2011-01-26 | Simple method for improving oil absorption value of calcined kaolin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100276840A CN102140264B (en) | 2011-01-26 | 2011-01-26 | Simple method for improving oil absorption value of calcined kaolin |
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| CN102140264A CN102140264A (en) | 2011-08-03 |
| CN102140264B true CN102140264B (en) | 2012-07-25 |
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| CN2011100276840A Expired - Fee Related CN102140264B (en) | 2011-01-26 | 2011-01-26 | Simple method for improving oil absorption value of calcined kaolin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114572990A (en) * | 2022-03-15 | 2022-06-03 | 太原理工大学 | Preparation method of calcined kaolin with high oil absorption value |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0112157A1 (en) * | 1982-12-13 | 1984-06-27 | Nordson Corporation | Method for coating with film-forming compositions |
| CN1415577A (en) * | 2002-09-28 | 2003-05-07 | 内蒙古三保高岭土有限公司 | Treatment and production technique for calcining kaolin |
| CN1847146A (en) * | 2006-04-30 | 2006-10-18 | 中国地质大学（北京） | Method of raising oil absorption rate of coal-bearing kaolin |
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2011
- 2011-01-26 CN CN2011100276840A patent/CN102140264B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0112157A1 (en) * | 1982-12-13 | 1984-06-27 | Nordson Corporation | Method for coating with film-forming compositions |
| CN1415577A (en) * | 2002-09-28 | 2003-05-07 | 内蒙古三保高岭土有限公司 | Treatment and production technique for calcining kaolin |
| CN1847146A (en) * | 2006-04-30 | 2006-10-18 | 中国地质大学（北京） | Method of raising oil absorption rate of coal-bearing kaolin |
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| CN102140264A (en) | 2011-08-03 |
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