CN113549344A - Titanium dioxide barium sulfate coating method - Google Patents
Titanium dioxide barium sulfate coating method Download PDFInfo
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- CN113549344A CN113549344A CN202110725521.3A CN202110725521A CN113549344A CN 113549344 A CN113549344 A CN 113549344A CN 202110725521 A CN202110725521 A CN 202110725521A CN 113549344 A CN113549344 A CN 113549344A
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- 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
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3615—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3615—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C1/3623—Grinding
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3615—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C1/363—Drying, calcination
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- 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
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/003—Flushing
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/043—Drying, calcination
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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Abstract
The invention belongs to the technical field of titanium dioxide production, and particularly discloses a titanium dioxide barium sulfate coating method, which comprises the following steps: 1) carrying out inorganic coating on the titanium white powder sand abrasive to obtain a coating base material containing sulfate radicals; 2) adjusting the temperature and the pH value of the coated base material, slowly adding a barium salt solution, and curing after the barium salt solution is added; 3) adjusting the pH value of the cured material, and curing; 4) and (3) washing, drying and grinding the materials to obtain the barium sulfate coated titanium dioxide. The method of the invention utilizes sulfate radicals in the titanium dioxide to form a barium sulfate coating film, can improve the application performances of the titanium dioxide such as covering power, dispersibility and the like, and can also reduce the oil absorption of the titanium dioxide.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a titanium dioxide barium sulfate coating method.
Background
Barium sulfate is widely used as an extender pigment in paints, and plays an important role in improving the thickness, wear resistance, water resistance, heat resistance, surface hardness, impact resistance and the like of a coating film. The particle size of barium sulfate is relatively close to that of primary particles of a plurality of pigments, and a certain steric hindrance effect exists on most pigment particles in a pigment dispersion system, so that the uniform diffusion of the pigment particles is facilitated, and the collision and aggregation of the pigment particles can be prevented. Barium sulfate is an important inorganic chemical material, and has become an inorganic filling material without substitution due to the advantages of easy development, low cost, low hardness and oil absorption value, no toxicity, light color, high brightness, acid and alkali resistance, good light resistance and dispersibility and the like.
Titanium dioxide, the main component of which is titanium dioxide, is a common white pigment and is widely used in the fields of paint, plastics, paper making, printing ink, chemical fibers and the like. Because titanium dioxide, especially rutile titanium dioxide, has photocatalytic activity, titanium dioxide which is not subjected to surface treatment can catalyze and degrade organic components which are in contact with the titanium dioxide in the using process, and the phenomena of light loss, pulverization, shedding and the like of the coating are generated, so that various performances of the product are seriously reduced, and the service life of the product is seriously prolonged. The current general method is to carry out surface inorganic coating treatment on titanium dioxide, namely coating a layer of inorganic hydrated oxide on titanium dioxide powder particles, wherein the coating substances mainly comprise silicon oxide, aluminum oxide, zirconium oxide and the like. The titanium dioxide and the organic medium can not be in direct contact, the photocatalysis shielding effect is achieved, and the direct contact between the titanium dioxide and light is reduced by blocking and covering the lattice defect of the titanium dioxide, so that the performances of the titanium dioxide, such as weather resistance, dispersibility and the like, are improved. At present, most of patent documents related to titanium dioxide and barium sulfate are physically mixed. The modification method for coating barium sulfate on the surface of titanium dioxide, which is disclosed in patent document CN 111454592 a, is to connect a polydopamine connecting layer on the surface of titanium dioxide, and then connect a barium sulfate coating layer on the surface of titanium dioxide, which is greatly different from the actual industrial production of titanium dioxide.
Disclosure of Invention
Sulfate radicals can be brought in the production process of titanium dioxide, particularly in the production process of titanium dioxide by a sulfuric acid method, the amount of the brought sulfate radicals is very large, and the sulfate radicals finally enter a wastewater system to generate titanium gypsum. If sulfate can be coated on the surface of the titanium dioxide through the coating, not only can the product performance be improved, but also waste byproducts can be reduced. Based on the research thought, the invention provides a method for coating barium sulfate on titanium dioxide, wherein a barium sulfate coating film is formed by using sulfate radicals in the titanium dioxide, so that the application performances of titanium dioxide such as covering power and dispersibility can be improved, and the oil absorption of the titanium dioxide can be reduced.
The invention provides a titanium dioxide barium sulfate coating method, which comprises the following steps:
1) carrying out inorganic coating on the titanium white powder sand abrasive to obtain a coating base material containing sulfate radicals;
2) adjusting the temperature and the pH value of the coated base material, slowly adding a barium salt solution, and curing after the barium salt solution is added;
3) adjusting the pH value of the cured material, and curing;
4) and (3) washing, drying and grinding the materials to obtain the barium sulfate coated titanium dioxide.
Preferably, the concentration of the titanium white sand abrasive is 200-600 g/L.
In the industrial production of titanium dioxide, an inorganic coating method is generally adopted to improve the application performance of titanium dioxide, and the coating method generally comprises a silicon-aluminum coating, a zirconium-aluminum coating, a single-aluminum coating and the like. During the coating process, the pH value of the slurry needs to be adjusted to a proper range by acid and alkali, wherein dilute sulfuric acid solution is adopted as the acid.
The invention mainly utilizes sulfate radical brought by a system in the conventional coating process to coat barium sulfate, thereby effectively utilizing the sulfate radical.
Taking the aluminum-clad film process as an example:
in the process of aluminum coating, the aluminum sources are mainly two, namely aluminum sulfate and sodium metaaluminate. The process route is also two types:
route one: al (Al)2(SO4)3+6NaOH＝2Al(OH)3↓+3Na2SO4
And a second route: 2NaAlO2+H2SO4+2H2O＝2Al(OH)3↓+Na2SO4
The barium sulfate coating reaction equation is as follows:
Ba2++SO4 2-＝BaSO4↓
titanium whiteCoating amount of powder aluminum is calculated according to Al2O3And (4) measuring the mass. From the above reaction equation, it can be calculated:
in route one, 1g of Al2O3Corresponds to 6.87g of BaSO4。
In route two, 1g of Al2O3Corresponds to 2.29g of BaSO4。
In general titanium dioxide industrial production, the aluminum-coated film amount is about 1-3.5%. The correspondingly produced sulfate radicals can be coated with barium sulfate 2.29% -8.02% (route two) or 6.87% -24.05% (route one). The data does not take into account sulfate introduced by the silicon coating, zirconium coating, etc., and sulfate introduced during pH adjustment. Therefore, the sulfate groups brought in during the actual coating process are larger than the above calculated data. As can be seen from the above, the conventional coating process has provided sufficient sulfate to allow barium sulfate coating.
Preferably, in the step 2), the temperature of the coating base material is 20-90 ℃, and the pH value is 2-12.
Further preferably, in step 2), the temperature of the coating base material is 50-70 ℃, and the pH value is 6-8.
In the invention, the barium salt is barium chloride or barium nitrate, the concentration of the barium salt solution is 50-500g/L, the adding time of the barium salt solution is 30-90min, and the adding amount of the barium salt solution enables the coating amount of barium sulfate to be 0.2-5 wt%.
Preferably, the concentration of the barium salt solution is 50-200g/L, and the barium salt solution is added in an amount such that the coating amount of barium sulfate is 0.5-2 wt%.
According to the invention, in the step 2) and the step 3), the curing time is 10-120 min.
Preferably, in the step 2) and the step 3), the curing time is 60-90 min.
Preferably, in step 3), the pH is 6 to 8.
The operating steps and parameters not defined in the present invention can be selected conventionally according to the prior art.
Compared with the prior art, the invention has the following beneficial effects:
1. the application performances such as covering power, dispersibility and the like of the titanium dioxide are improved;
2. waste byproducts in the production process of titanium dioxide are reduced;
3. the oil absorption of the titanium dioxide is reduced.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
1. Taking the intercar sand grinding material, adjusting the concentration of the sand grinding material to 300g/L, adjusting the pH to 10-10.5 and the temperature to 60 ℃; 2. adopting sodium metaaluminate and dilute sulfuric acid solution to perform parallel flow coating, performing parallel flow for 90min, controlling the aluminum coating amount to be 1 wt%, performing parallel flow coating, and curing for 90 min; 3. adjusting the pH value of the slurry to 6.8-7.2, and curing for 90 min; 4. slowly adding barium chloride solution (with concentration of 100g/L) with barium sulfate coating amount of 0.5 wt%, adding for 60min, and aging for 90 min; 5. adjusting the pH value of the slurry to 6.8-7.2, and curing for 90 min. 6. And after coating, washing, drying and grinding to obtain a sample 1 for later use.
Example 2
The difference from example 1 is that: the coating amount of barium sulfate was changed to 1 wt%, and sample 2 was obtained for use.
Example 3
The difference from example 1 is that: the coating amount of barium sulfate was changed to 2 wt%, and sample 3 was obtained for use.
Comparative example 1
1. Taking the intercar sand grinding material, adjusting the concentration of the sand grinding material to 300g/L, adjusting the pH to 10-10.5 and the temperature to 60 ℃; 2. adopting sodium metaaluminate and dilute sulfuric acid solution to perform parallel flow coating for 90min, wherein the aluminum coating amount is 1 wt%, and curing for 90min after the parallel flow coating is finished; 3. adjusting the pH value of the slurry to 6.8-7.2, and curing for 90 min; 4. and after coating, washing, drying and grinding to obtain a comparison sample 1 for later use.
The samples obtained in the respective examples and comparative examples were examined by a conventional method, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the titanium dioxide prepared by the method of the invention has lower oil absorption, higher covering power and better dispersibility, and can reduce waste byproducts in the production process of the titanium dioxide.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (10)
1. A method for coating barium sulfate with titanium dioxide is characterized by comprising the following steps:
1) carrying out inorganic coating on the titanium white powder sand abrasive to obtain a coating base material containing sulfate radicals;
2) adjusting the temperature and the pH value of the coated base material, slowly adding a barium salt solution, and curing after the barium salt solution is added;
3) adjusting the pH value of the cured material, and curing;
4) and (3) washing, drying and grinding the materials to obtain the barium sulfate coated titanium dioxide.
2. The method for coating barium sulfate titanium dioxide according to claim 1, wherein the concentration of the titanium white sand abrasive is 200-600 g/L.
3. The method for coating the barium sulfate titanium dioxide according to claim 1, wherein the inorganic coating comprises a silicon-aluminum coating, a zirconium-aluminum coating and a single-aluminum coating.
4. The method for coating barium sulfate titanium dioxide according to claim 1, wherein in the step 2), the temperature of the coating base material is 20-90 ℃, and the pH value is 2-12.
5. The method for coating barium sulfate titanium dioxide according to claim 4, wherein in the step 2), the temperature of the coating base material is 50-70 ℃, and the pH value is 6-8.
6. The method for coating barium sulfate titanium dioxide according to claim 1, wherein the barium salt is barium chloride or barium nitrate, the concentration of the barium salt solution is 50-500g/L, the addition time of the barium salt solution is 30-90min, and the addition amount of the barium salt solution enables the coating amount of barium sulfate to be 0.2-5 wt%.
7. The method for coating barium sulfate titanium dioxide according to claim 6, wherein the concentration of the barium salt solution is 50-200g/L, and the amount of the barium salt solution added is such that the coating amount of barium sulfate is 0.5-2 wt%.
8. The method for coating barium sulfate titanium dioxide according to claim 1, wherein in the step 2) and the step 3), the curing time is 10-120 min.
9. The method for coating barium sulfate titanium dioxide according to claim 8, wherein in the step 2) and the step 3), the curing time is 60-90 min.
10. The method for coating barium sulfate titanium dioxide according to claim 1, wherein in step 3), the pH value is 6-8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114891370A (en) * | 2022-06-15 | 2022-08-12 | 张木彬 | Coated anatase titanium dioxide and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160230021A1 (en) * | 2015-02-09 | 2016-08-11 | Fuji Xerox Co., Ltd. | Powder coating material |
| CN110903681A (en) * | 2019-12-18 | 2020-03-24 | 龙蟒佰利联集团股份有限公司 | Preparation method of super-weather-resistant titanium dioxide |
| CN110951282A (en) * | 2019-12-18 | 2020-04-03 | 龙蟒佰利联集团股份有限公司 | Preparation method for improving weather resistance of titanium dioxide |
| CN111454592A (en) * | 2020-04-08 | 2020-07-28 | 浙江恒澜科技有限公司 | Modified titanium dioxide and preparation method and application thereof |
-
2021
- 2021-06-29 CN CN202110725521.3A patent/CN113549344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160230021A1 (en) * | 2015-02-09 | 2016-08-11 | Fuji Xerox Co., Ltd. | Powder coating material |
| CN110903681A (en) * | 2019-12-18 | 2020-03-24 | 龙蟒佰利联集团股份有限公司 | Preparation method of super-weather-resistant titanium dioxide |
| CN110951282A (en) * | 2019-12-18 | 2020-04-03 | 龙蟒佰利联集团股份有限公司 | Preparation method for improving weather resistance of titanium dioxide |
| CN111454592A (en) * | 2020-04-08 | 2020-07-28 | 浙江恒澜科技有限公司 | Modified titanium dioxide and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114891370A (en) * | 2022-06-15 | 2022-08-12 | 张木彬 | Coated anatase titanium dioxide and preparation method thereof |
| CN114891370B (en) * | 2022-06-15 | 2023-09-22 | 衡水澳德彩建筑装饰材料有限公司 | Coated anatase titanium dioxide and preparation method thereof |
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