CN113321944A - Preparation method of hydrophobic white carbon black - Google Patents
Preparation method of hydrophobic white carbon black Download PDFInfo
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- CN113321944A CN113321944A CN202110757249.7A CN202110757249A CN113321944A CN 113321944 A CN113321944 A CN 113321944A CN 202110757249 A CN202110757249 A CN 202110757249A CN 113321944 A CN113321944 A CN 113321944A
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- carbon black
- white carbon
- hydrogen
- silicone oil
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3081—Treatment with organo-silicon compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of hydrophobic white carbon black. The preparation method comprises the following steps: the hydrophobic white carbon black is obtained by modifying the surface of the white carbon black by using high-hydrogen-containing silicone oil, and specifically, the catalyst is applied to the surface of the white carbon black firstly, and then the white carbon black is subjected to heat treatment by using hot air carrying the high-hydrogen-containing silicone oil. Compared with the prior art, the method provided by the invention is simple to operate, energy-saving and environment-friendly, the prepared hydrophobic white carbon black has good affinity with raw rubber, and the powder is easy to disperse uniformly.
Description
Technical Field
The invention relates to a preparation method of hydrophobic white carbon black.
Background
The precipitated hydrated silicon dioxide, namely white carbon black, presents hydrophilicity due to the existence of active hydroxyl groups and adsorption water on the surface and an acid area on the surface caused by a preparation process, has poor affinity with raw rubber, is easy to agglomerate and not easy to uniformly disperse, and is easy to structure in rubber compound, so that the service performance of the precipitated hydrated silicon dioxide is influenced. Surface treatment of precipitated hydrated silica with certain chemicals is one of the effective ways to eliminate or reduce the amount of surface hydroxyl groups, change them from hydrophilic to hydrophobic, and improve the affinity of the precipitated hydrated silica during use.
Disclosure of Invention
The invention aims to provide a method for preparing hydrophobic white carbon black by performing surface modification on white carbon black by using high-hydrogen-content silicone oil.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the preparation method of the hydrophobic white carbon black comprises the following steps:
and (3) carrying out surface modification on the white carbon black by using high-hydrogen-content silicone oil to obtain the hydrophobic white carbon black.
Preferably, the hydrogen content of the high hydrogen-containing silicone oil is more than or equal to 1.55 wt%.
More preferably, the hydrogen content of the high hydrogen-containing silicone oil is 1.55-1.6 wt%.
Preferably, the specific steps of surface modification are as follows:
firstly, applying a catalyst on the surface of the white carbon black;
and then carrying out heat treatment on the white carbon black by using hot gas carrying high-hydrogen-content silicone oil to obtain the hydrophobic white carbon black.
More preferably, the catalyst is chloroplatinic acid.
More preferably, chloroplatinic acid is dissolved in water and then sprayed on the surface of the white carbon black.
More preferably, the dosage of the chloroplatinic acid is 10-1000 ppm of the mass of the white carbon black.
More preferably, nitrogen or air is introduced into the high hydrogen-containing silicone oil with the temperature of 120-140 ℃ to obtain hot gas carrying the high hydrogen-containing silicone oil.
More preferably, the flow rate of nitrogen or air is 0.1-1 m3The temperature is 60-80 ℃ per min.
More preferably, the heat treatment time is 0.5 to 2 hours.
Detailed Description
The present invention will be described in further detail with reference to preferred embodiments thereof.
The hydrophobic white carbon black of the invention is prepared by the following steps: the surface modification is carried out on the white carbon black by using high hydrogen-containing silicone oil.
As one of the preferable technical schemes of the invention, the hydrogen content of the high hydrogen-containing silicone oil is more than or equal to 1.55 wt%, and more preferably, the hydrogen content of the high hydrogen-containing silicone oil is 1.55-1.6 wt%. The silicone oil with the hydrogen content lower than the hydrogen content has poor crosslinking film forming property on the surface of the white carbon black.
In the present invention, the surface modification comprises the following specific steps:
firstly, applying a catalyst on the surface of the white carbon black;
and then carrying out heat treatment on the white carbon black by using hot gas carrying high-hydrogen-content silicone oil to obtain the hydrophobic white carbon black.
In the present invention, the catalyst may be selected from platinum group catalysts.
As one of the preferable technical proposal of the invention, the catalyst is chloroplatinic acid. The chloroplatinic acid can be dissolved in water and then sprayed on the surface of the white carbon black.
The invention adopts a spraying mode, on one hand, the problem of wastewater treatment caused by a conventional dipping mode can be avoided, the water consumption is obviously saved, on the other hand, the invention is also beneficial to subsequent hot gas treatment, the drying energy consumption is saved, and the agglomeration of particles is avoided.
When chloroplatinic acid is selected as the catalyst, the dosage of the catalyst can be 10-1000 ppm of the mass of the white carbon black.
As one of the preferable technical schemes of the invention, the hot gas carrying the high hydrogen-containing silicone oil can be obtained by introducing nitrogen or air into the high hydrogen-containing silicone oil with the temperature of 120-140 ℃, and the nitrogen is preferably adopted.
The flow rate of nitrogen or air as carrier gas is not particularly required, but can be controlled to 0.1-1 m3And/min, making the temperature of the hot gas carrying the high hydrogen-containing silicone oil not lower than 120 ℃.
The temperature of nitrogen or air can be preheated to 60-80 ℃, and then high-hydrogen-containing silicone oil is introduced.
The white carbon black with the catalyst applied on the surface is subjected to heat treatment by hot air carrying high-hydrogen-content silicone oil, so that on one hand, water on the surface of the white carbon black can be evaporated and discharged along with the hot air, and on the other hand, the high-hydrogen-content silicone oil in the hot air is crosslinked to form a hydrophobic film under the action of the catalyst on the surface of the white carbon black.
Example 1
A preparation method of hydrophobic white carbon black comprises the following steps:
the dosage of the chloroplatinic acid is fifty million parts of the mass of the white carbon black.
The high-hydrogen-content silicone oil is methyl high-hydrogen-content silicone oil sold in the market, and the hydrogen content is 1.56-1.60 wt%.
According to the proportion, the chloroplatinic acid is firstly dissolved in water (used for preparation now), and then the chloroplatinic acid is sprayed on the surface of the white carbon black under stirring.
Preheating nitrogen gas to 60 ℃ at a pressure of 0.2m3Introducing high-hydrogen-containing silicone oil with the temperature of 130 ℃ at the flow rate of/min to obtain hot nitrogen loaded with the high-hydrogen-containing silicone oil.
And introducing the obtained hot nitrogen carrying the high hydrogen-containing silicone oil into the white carbon black for heat treatment for 1 hour.
Cooling the tail gas, and recycling the nitrogen and the silicone oil obtained by gas-liquid separation and oil-water separation.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the hydrophobic white carbon black comprises the following steps:
and (3) carrying out surface modification on the white carbon black by using high-hydrogen-content silicone oil to obtain the hydrophobic white carbon black.
2. The method of claim 1, wherein: the hydrogen content of the high hydrogen-containing silicone oil is more than or equal to 1.55 wt%.
3. The method of claim 2, wherein: the hydrogen content of the high-hydrogen silicone oil is 1.55-1.6 wt%.
4. The method of claim 1, wherein: the surface modification comprises the following specific steps:
firstly, applying a catalyst on the surface of the white carbon black;
and then carrying out heat treatment on the white carbon black by using hot gas carrying high-hydrogen-content silicone oil to obtain the hydrophobic white carbon black.
5. The method of claim 4, wherein: the catalyst is chloroplatinic acid.
6. The method of claim 5, wherein: dissolving chloroplatinic acid in water, and then spraying the chloroplatinic acid on the surface of the white carbon black.
7. The method of claim 5, wherein: the dosage of the chloroplatinic acid is 10-1000 ppm of the mass of the white carbon black.
8. The method of claim 4, wherein: introducing nitrogen or air into the high-hydrogen-content silicone oil with the temperature of 120-140 ℃ to obtain hot gas carrying the high-hydrogen-content silicone oil.
9. The method of claim 8, wherein: the flow rate of nitrogen or air is 0.1-1 m3The temperature is 60-80 ℃ per min.
10. The method of claim 4, wherein: the heat treatment time is 0.5 to 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110757249.7A CN113321944A (en) | 2021-07-05 | 2021-07-05 | Preparation method of hydrophobic white carbon black |
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| CN202110757249.7A CN113321944A (en) | 2021-07-05 | 2021-07-05 | Preparation method of hydrophobic white carbon black |
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| CN113321944A true CN113321944A (en) | 2021-08-31 |
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| CN202110757249.7A Pending CN113321944A (en) | 2021-07-05 | 2021-07-05 | Preparation method of hydrophobic white carbon black |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115678154A (en) * | 2022-11-11 | 2023-02-03 | 石狮市金滩鞋业有限公司 | Wear-resistant anti-skidding EVA shoe sole and processing technology thereof |
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| CN103550960A (en) * | 2013-11-18 | 2014-02-05 | 中国科学院新疆理化技术研究所 | Synthesis method of propanediol block polyether modified organosilicone compound defoaming agent |
| CN104087571A (en) * | 2014-06-14 | 2014-10-08 | 江南大学 | Immobilized lipase using hydrogen-containing silicone oil hydrophobic modified silica as carrier and preparation method thereof |
| CN104650625A (en) * | 2015-02-09 | 2015-05-27 | 江苏荣昌新材料科技有限公司 | Method for modifying nanometer silicon dioxide by using hydrogenated silicon oil |
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| CN109735112A (en) * | 2018-12-28 | 2019-05-10 | 广州市白云化工实业有限公司 | Additional organosilicon thermally conductive gel and preparation method thereof |
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2021
- 2021-07-05 CN CN202110757249.7A patent/CN113321944A/en active Pending
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| CN102965908A (en) * | 2012-11-21 | 2013-03-13 | 际华三五零九纺织有限公司 | Method for radiation curing of pure organic silicone coated fabric by using electron beams |
| CN103550960A (en) * | 2013-11-18 | 2014-02-05 | 中国科学院新疆理化技术研究所 | Synthesis method of propanediol block polyether modified organosilicone compound defoaming agent |
| CN104087571A (en) * | 2014-06-14 | 2014-10-08 | 江南大学 | Immobilized lipase using hydrogen-containing silicone oil hydrophobic modified silica as carrier and preparation method thereof |
| CN104650625A (en) * | 2015-02-09 | 2015-05-27 | 江苏荣昌新材料科技有限公司 | Method for modifying nanometer silicon dioxide by using hydrogenated silicon oil |
| CN106280352A (en) * | 2016-08-09 | 2017-01-04 | 叶剑 | A kind of unsaturated polyester (UP) composite decorating board and manufacture method thereof |
| CN109735112A (en) * | 2018-12-28 | 2019-05-10 | 广州市白云化工实业有限公司 | Additional organosilicon thermally conductive gel and preparation method thereof |
| CN110154185A (en) * | 2019-06-20 | 2019-08-23 | 福建农林大学 | It is a kind of using ethyl alcohol as the two-component timber modifying super hydrophobicity liquid of dispersing agent |
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| CN115678154A (en) * | 2022-11-11 | 2023-02-03 | 石狮市金滩鞋业有限公司 | Wear-resistant anti-skidding EVA shoe sole and processing technology thereof |
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Application publication date: 20210831 |