CN110669359A - Surface treatment process of special titanium dioxide for papermaking - Google Patents
Surface treatment process of special titanium dioxide for papermaking Download PDFInfo
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- CN110669359A CN110669359A CN201910988651.9A CN201910988651A CN110669359A CN 110669359 A CN110669359 A CN 110669359A CN 201910988651 A CN201910988651 A CN 201910988651A CN 110669359 A CN110669359 A CN 110669359A
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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
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic 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
- C09C3/06—Treatment with inorganic compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
Abstract
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a surface treatment process of special titanium dioxide for papermaking, which comprises the following steps: adding a dispersing agent into the titanium dioxide slurry after sanding, stirring, dispersing and sieving to obtain TiO in the slurry2The amount of the titanium dioxide particles is 200-400 g/L, the surfaces of the titanium dioxide particles are coated with cerium phosphate, silicon dioxide and phosphorus pentoxide, finally, the surfaces of the titanium dioxide particles are coated with aluminum oxide by the cocurrent flow of alkaline aluminum and acidic aluminum, solid-liquid separation is carried out, and the solid is treated to obtain a finished product. According to the invention, cerium salt and silicate are used for coating titanium dioxide particles, so that the sun-proof performance of titanium dioxide in a papermaking system is greatly enhanced, and the service life of titanium dioxide is prolonged; the aluminum oxide is coated by the parallel flow of the alkaline aluminum and the acidic aluminum, so that the space of the coating tank is greatly saved, the titanium white powder coating amount of one coating tank is increased, and the titanium white powder coating amount can be within the same timeThe yield is increased, and the economic benefit can be better improved.
Description
Technical Field
The invention relates to the technical field of titanium dioxide production, in particular to a surface treatment process of titanium dioxide special for papermaking.
Background
Titanium dioxide (commonly known as titanium dioxide) is the best white pigment in the world at present, not only has stable physical and chemical properties, but also has excellent optical and electrical properties such as high refractive index, optimal covering power, optimal whiteness and brightness, and the like, and is widely applied to the fields of coatings, plastics, papermaking, printing ink, electronics, and the like. In the field of papermaking, the decorative paper uses titanium dioxide mostly, the quality of titanium dioxide used in the decorative paper is high, and especially the use amount of the titanium dioxide in the white decorative paper can reach 45%. The decorative paper is a component of a coating material of decorative thermosetting plastics, is placed under surface paper in a product structure, does not need to be coated after being coated, and mainly plays a role in providing decoration of patterns and a covering role in preventing bottom layer glue from permeating. Titanium dioxide for decorative paper should have good covering power, weather resistance (anti-powdering capability), color fastness and water dispersibility so as to ensure that the decorative paper has excellent use performance. However, some light activation points exist on the surface of titanium dioxide powder particles, so that the titanium dioxide pigment has a photocatalytic effect, and a photocatalytic reaction occurs under the irradiation of sunlight, especially ultraviolet rays, so that organic components in contact with titanium dioxide are degraded and pulverized, and various performances and service life of decorative paper are seriously influenced. Therefore, titanium dioxide pigments used in decorative papers often have to be subjected to special surface treatments.
CN105199434A discloses a surface treatment method of titanium dioxide, which comprises the following specific steps: preparing a rutile type titanium dioxide primary product into a dissolving pulp, dispersing the dissolving pulp by using a dispersing agent, stirring and heating to a set temperature, adding a proper amount of trivalent soluble cerium salt to adjust the mixture to an acid environment, maintaining the pH value within the range of 4-6, adding one or mixture of sodium aluminate solution and phosphoric acid or disodium hydrogen phosphate and the balance of cerium salt solution in a concurrent flow manner, and curing to form a first layer of a mixed coating film of cerium phosphate and aluminum phosphate; adjusting and maintaining the pH value within the range of 7-9.5, adding a sodium aluminate solution and sulfuric acid or hydrochloric acid in a concurrent flow manner, and forming a second-layer boehmite alumina coating film after curing; filtering and washing with deionized water, drying, and pulverizing to obtain the final product.
Disclosure of Invention
The invention aims to provide a surface treatment process of special titanium dioxide with excellent light resistance for papermaking.
The invention firstly provides a surface treatment process of special titanium dioxide for papermaking, which comprises the following steps:
s1, adding the dispersing agent into the titanium dioxide slurry after sanding, stirring and dispersing, and then sieving to obtain TiO in the slurry2The amount of the (B) is 200-400 g/L;
s2, heating to 30-50 ℃, adding a water-soluble cerium salt solution, adding phosphoric acid and/or a phosphate solution in parallel, maintaining the pH value at 3-5, and curing for 30-60 min;
s3, heating to 50-70 ℃, adding a silicate solution, adjusting the pH value to 8-10, and curing for 30-60 min;
s4, keeping the temperature unchanged, adjusting the pH value to 3-6, curing for 10-30 min, adding phosphoric acid and/or phosphate solution, controlling the pH value to 4.5-7.5, and curing for 60-120 min;
s5, keeping the temperature unchanged, adding an aluminum salt solution, adjusting the pH value to 6-8, and curing for 90-180 min;
and S6, carrying out solid-liquid separation, and treating the solid to obtain a finished product.
In the surface treatment process of the titanium dioxide special for papermaking, in S1, the dispersant is a mixed solution of sodium silicate and sodium hydroxide; preferably, in the dispersing agent, the weight ratio of sodium hydroxide to sodium silicate is 1: 5-1: 20.
In the surface treatment process of the special titanium dioxide for papermaking, the addition amount of the dispersing agent is TiO20.1 to 0.3% by mass.
In the surface treatment process of the titanium dioxide special for papermaking, in S2, the cerium salt is cerium sulfate or cerium chloride; the concentration of the cerium salt solution is 15-50 g/L; the addition time of the cerium salt solution is 20-45 min.
In the surface treatment process of the titanium dioxide special for papermaking, in S2, the cerium salt solution is added with CeO2Calculated as TiO in the slurry20.1 to 0.5% by mass.
In the surface treatment process of the titanium dioxide special for papermaking, in S2 and S4, the phosphate is one or more than two of sodium phosphate, sodium monohydrogen phosphate or sodium dihydrogen phosphate, and the concentration of the phosphoric acid and/or phosphate solution is 50-150 g/L; preferably, in the phosphoric acid and/or the phosphate solution, the weight ratio of the sodium phosphate to the phosphoric acid or other phosphates is 1: 1-1: 15.
In the surface treatment process of the special titanium dioxide for papermaking, in S3, the silicate is sodium silicate or potassium silicate; the concentration of the silicate solution is 50-150 g/L; the adding time of the silicate solution is 30-60 min.
Wherein, in the surface treatment process of the special titanium dioxide for papermaking, S3, the addition of the silicate solution is SiO2Calculated as TiO in the slurry20.1 to 0.5% by mass.
Wherein, in the surface treatment process of the special titanium pigment for papermaking, S4, the adding amount of the phosphoric acid and/or the phosphate is P2O5Calculated as TiO in the slurry21-3.5% of the mass; the adding time of the phosphoric acid and/or the phosphate solution is 30-60 min.
In the surface treatment process of the special titanium dioxide for papermaking, in S5, the aluminum salt is aluminum sulfate and sodium metaaluminate, and the concentration of the aluminum salt solution is 50-150 g/L; the addition amount of the aluminum salt solution is Al2O3Calculated as TiO in the slurry24-7% of the mass; the adding time of the aluminum salt solution is 60-120 min.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, cerium salt and silicate are used for coating titanium dioxide particles, so that the sun-proof performance of titanium dioxide in a papermaking system is greatly enhanced, and the service life of titanium dioxide is prolonged; the aluminum oxide is coated by the parallel flow of the alkaline aluminum and the acidic aluminum, so that the space of the coating tank is greatly saved, the titanium white powder can be coated in one coating tank, the yield is increased in the same time, and the economic benefit can be better improved.
Detailed Description
Specifically, the surface treatment process of the special titanium dioxide for papermaking comprises the following steps:
s1, adding the dispersing agent into the titanium dioxide slurry after sanding, stirring and dispersing, and then sieving to obtain TiO in the slurry2The amount of the (B) is 200-400 g/L;
s2, heating to 30-50 ℃, adding a water-soluble cerium salt solution, adding phosphoric acid and/or a phosphate solution in parallel, maintaining the pH value at 3-5, and curing for 30-60 min;
s3, heating to 50-70 ℃, adding a silicate solution, adjusting the pH value to 8-10, and curing for 30-60 min;
s4, keeping the temperature unchanged, adjusting the pH value to 3-6, curing for 10-30 min, adding phosphoric acid and/or phosphate solution, controlling the pH value to 4.5-7.5, and curing for 60-120 min;
s5, keeping the temperature unchanged, adding an aluminum salt solution, adjusting the pH value to 6-8, and curing for 90-180 min;
and S6, carrying out solid-liquid separation, and treating the solid to obtain a finished product.
In step S1 of the method of the present invention, the dispersant is a mixed solution of sodium silicate and sodium hydroxide, the sodium hydroxide in the mixed solution mainly functions to adjust the pH, and when the weight ratio of the sodium hydroxide to the sodium silicate is 1:5 to 1:20, the dispersant has the best dispersing effect.
In the method, the comprehensive solubility is considered, the concentration of a cerium salt solution is set to be 15-50 g/L, and the concentration of phosphoric acid and/or a phosphate solution is set to be 50-150 g/L; the concentration of the silicate solution is set to be 50-150 g/L; the concentration of the aluminum salt solution is set to be 50-150 g/L. And if the concentration is too high, the local reaction will be too violent, and if the concentration is too low, the envelope will not be stored too much, which affects the yield.
In step S2, the water-soluble cerium salt reacts with phosphoric acid and/or phosphate solution to generate cerium phosphate which is coated on the surface of titanium dioxide particles, and the reaction deposition is fastest only when the pH value is 3-5. The amount of phosphoric acid and/or phosphate solution added is determined by the pH.
In step S3 of the method, the deposition of silicon dioxide is fastest only when the pH is 8-10.
In step S4, the surface of the titanium dioxide particles is coated with a phosphorus pentoxide film layer, and phosphorus pentoxide deposits at the fastest pH value of 4.5-7.5.
In step S5 of the process of the present invention, the aluminum salt is added only to adjust the pH value after the pH value is ensuredThe product is used continuously; the aluminum salt is aluminum sulfate and sodium metaaluminate, and the addition amount of the aluminum salt solution is Al2O3Calculated as TiO in the slurry24-7% of the mass; in practice, a portion of the aluminum salt is first determined and added in the amount of Al2O3Calculated as TiO in the slurry22-3.5% of the mass, and then determining the dosage of the other part of aluminum salt according to the pH value.
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The raw materials are not indicated by manufacturers, and are all conventional products which can be obtained commercially.
Example 1
1) A dispersant consisting of sodium silicate and sodium hydroxide (sodium hydroxide: sodium silicate 1:10) was used in a ratio of TiO2Adding a dispersing agent into the titanium dioxide solution according to the proportion of 0.2 percent of the total mass, and sieving the mixture by a 325-mesh sieve to obtain the slurry to be used.
2) The concentration of the titanium dioxide slurry is 300g/L, the temperature is raised to 45 ℃, and the initial pH value is 9.6.
3) Adding cerium sulfate solution within 30min, wherein the adding amount of the cerium sulfate is CeO2Calculated as TiO in the slurry2Adding 0.2 wt% of mixed solution of sodium phosphate and sodium dihydrogen phosphate (sodium phosphate: sodium dihydrogen phosphate ═ 1:15), maintaining pH at 3.5-4.0, and aging for 45 min.
4) Heating to 65 deg.C, adding sodium silicate solution in SiO in 30min2Calculated as TiO in the slurry22.5% of the total mass, 8.6 of pH value, and curing for 45 min.
5) Keeping the temperature constant, adding dilute sulfuric acid (mass fraction of dilute sulfuric acid is 10%), maintaining pH at 4.0-4.5, aging for 30min, adding mixed solution of phosphoric acid and sodium monohydrogen phosphate (sodium phosphate: sodium monohydrogen phosphate is 1:10) within 45min, and adding the mixed solution in an amount of P2O5Calculated as TiO in the slurry22.0 percent of the mass,adjusting pH to 6.1, and aging for 60 min.
6) Keeping the temperature constant, and adding aluminum sulfate solution in an amount of Al for 60min2O3Calculated as TiO in the slurry22.5% of the total weight, adding sodium metaaluminate solution to maintain pH value at 6.0-6.5, and aging for 90 min.
7) And (4) carrying out suction filtration washing, organic treatment, drying and air flow crushing to obtain a finished product.
Example 2
1) A dispersant consisting of sodium silicate and sodium hydroxide (sodium hydroxide: sodium silicate 1:13) was used in a ratio of TiO2Adding a dispersing agent into the titanium dioxide solution according to the proportion of 0.15 percent of the total amount, and sieving the mixture by a 500-mesh sieve to obtain the slurry to be used.
2) The concentration of the titanium dioxide slurry is 320g/L, the temperature is raised to 45 ℃, and the initial pH value is 9.8.
3) Adding cerium sulfate solution within 30min, wherein the adding amount of the cerium sulfate is CeO2Calculated as TiO in the slurry2Adding 0.3 wt% of mixed solution of sodium phosphate and phosphoric acid (sodium phosphate: phosphoric acid: 1), maintaining pH at 4.0-4.5, and aging for 60 min.
4) Heating to 60 deg.C, adding sodium silicate solution in amount of SiO within 45min2Calculated as TiO in the slurry23.0% of the mass, pH 9.5, and aging for 60 min.
5) Keeping the temperature constant, adding dilute sulfuric acid (mass fraction of dilute sulfuric acid is 20%), maintaining pH at 3.8-4.2, aging for 30min, adding mixed solution of phosphoric acid and sodium hydrogen phosphate (phosphoric acid: sodium hydrogen phosphate is 1:1) within 50min, and adding the mixed solution in an amount of P2O5Calculated as TiO in the slurry22.7% of the total mass, 6.9 of pH value, and curing for 90 min.
6) Keeping the temperature constant, and adding aluminum sulfate solution in an amount of Al for 90min2O3Calculated as TiO in the slurry23.0% of the total weight, adding sodium metaaluminate solution to maintain pH at 6.5-7.0, and aging for 150 min.
7) And (5) carrying out suction filtration washing, organic treatment, drying and gas powder to obtain a finished product.
Example 3
1) A dispersant consisting of sodium silicate and sodium hydroxide (sodium hydroxide: sodium silicate 1:20) was used in a ratio of TiO2Adding a dispersing agent into the titanium dioxide solution according to the proportion of 0.2 percent of the total amount, and sieving the mixture by a 500-mesh sieve to obtain the slurry to be used.
2) The concentration of the titanium dioxide slurry is 270g/L, the temperature is raised to 50 ℃, and the initial pH value is 10.1.
3) Adding cerium sulfate solution within 45min, wherein the adding amount of the cerium sulfate is CeO2Calculated as TiO in the slurry2Adding 0.4 wt% of mixed solution of sodium phosphate and sodium dihydrogen phosphate (sodium phosphate: sodium dihydrogen phosphate ═ 1:10), maintaining pH at 4.2-4.7, and aging for 60 min.
4) Heating to 70 ℃, and adding sodium silicate solution within 45min, wherein the adding amount of the sodium silicate is SiO2Calculated as TiO in the slurry23.0% of the mass, pH 9.4, and aging for 60 min.
5) Keeping the temperature constant, adding dilute sulfuric acid (mass fraction of dilute sulfuric acid is 30%), maintaining pH at 4.5-5.0, aging for 30min, adding a mixture of phosphoric acid and sodium monohydrogen phosphate (phosphoric acid: sodium monohydrogen phosphate is 1:15) in an amount of P within 60 mm2O5Calculated as TiO in the slurry23.3% of the total weight, pH 7.3, aging for 120 min.
6) Keeping the temperature unchanged, and adding the sodium metaaluminate solution in an amount of Al for 90min2O3Calculated as TiO in the slurry23.0% of the mass, adding aluminum sulfate solution to maintain the pH value between 6.8-7.4, and aging for 150 min.
7) And (5) carrying out suction filtration washing, organic treatment, drying and gas powder to obtain a finished product.
The samples prepared in the above examples 1 to 3 and domestic and foreign papermaking titanium dioxide are subjected to application detection of a melamine resin system, and the results are as follows:
TABLE 1 comparison of examples with papermaking titanium dioxide application data at home and abroad
| Water-dispersible | Whiteness degree | Hiding power | Foamability | Light fastness | |
| Example 1 | 98％ | 97.6 | Near label | Is free of | Near label |
| Example 2 | 99％ | 98.1 | Superior to standard | Is free of | Superior to standard |
| Example 3 | 99％ | 98.2 | Superior to standard | Is free of | Superior to standard |
| Domestic titanium white powder 1 | 85％ | 97.7 | Sign board | Is free of | Sign board |
| Domestic titanium white 2 | 91％ | 96.9 | Slightly worse than the standard | Small amount of | Near label |
| Foreign titanium white powder 3 | 99％ | 98.1 | Superior to standard | Is free of | Superior to standard |
As can be seen from table 1: the application performance of the embodiments 1, 2 and 3 in the melamine resin system is superior to that of the domestic titanium dioxide 1 and 2, and the application performance of the embodiment 3 is similar to that of the foreign titanium dioxide 3, which shows that the titanium dioxide treated by the surface treatment process can be well used in the papermaking system.
Claims (10)
1. The surface treatment process of the titanium dioxide special for papermaking is characterized by comprising the following steps:
s1, adding the dispersing agent into the titanium dioxide slurry after sanding, stirring and dispersing, and then sieving to obtain TiO in the slurry2The amount of the (B) is 200-400 g/L;
s2, heating to 30-50 ℃, adding a water-soluble cerium salt solution, adding phosphoric acid and/or a phosphate solution in parallel, maintaining the pH value at 3-5, and curing for 30-60 min;
s3, heating to 50-70 ℃, adding a silicate solution, adjusting the pH value to 8-10, and curing for 30-60 min;
s4, keeping the temperature unchanged, adjusting the pH value to 3-6, curing for 10-30 min, adding phosphoric acid and/or phosphate solution, controlling the pH value to 4.5-7.5, and curing for 60-120 min;
s5, keeping the temperature unchanged, adding an aluminum salt solution, adjusting the pH value to 6-8, and curing for 90-180 min;
and S6, carrying out solid-liquid separation, and treating the solid to obtain a finished product.
2. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S1, the dispersant is a mixed solution of sodium silicate and sodium hydroxide; preferably, in the dispersing agent, the weight ratio of sodium hydroxide to sodium silicate is 1: 5-1: 20.
3. The surface treatment process of the special titanium dioxide for papermaking according to claim 2, characterized in that: the addition amount of the dispersing agent is TiO20.1 to 0.3% by mass.
4. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S2, the cerium salt is cerium sulfate or cerium chloride; the concentration of the cerium salt solution is 15-50 g/L; the addition time of the cerium salt solution is 20-45 min.
5. The surface treatment process of the special titanium dioxide for papermaking according to claim 4, characterized in that: in S2, the cerium salt solution is added in CeO2Calculated as TiO in the slurry20.1 to 0.5% by mass.
6. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S2 and S4, the phosphate is one or more than two of sodium phosphate, sodium monohydrogen phosphate or sodium dihydrogen phosphate, and the concentration of the phosphoric acid and/or phosphate solution is 50-150 g/L; preferably, in the phosphoric acid and/or the phosphate solution, the weight ratio of the sodium phosphate to the phosphoric acid or other phosphates is 1: 1-1: 15.
7. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S3, the silicate is sodium silicate or potassium silicate; the concentration of the silicate solution is 50-150 g/L; the adding time of the silicate solution is 30-60 min.
8. The surface treatment process of the special titanium dioxide for papermaking according to claim 7, characterized in that: s3, the silicate solution is added in an amount of SiO2Calculated as TiO in the slurry20.1 to 0.5% by mass.
9. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S4, the phosphoric acid and/or phosphate is added in an amount of P2O5Calculated as TiO in the slurry21-3.5% of the mass; the adding time of the phosphoric acid and/or the phosphate solution is 30-60 min.
10. The surface treatment process of the special titanium dioxide for papermaking according to claim 1, characterized in that: in S5, the aluminum salt is aluminum sulfate and sodium metaaluminate, and the concentration of the aluminum salt solution is 50-150 g/L; the addition amount of the aluminum salt solution is Al2O3Calculated as TiO in the slurry24-7% of the mass; the adding time of the aluminum salt solution is 60-120 min.
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| CN111925669A (en) * | 2020-08-19 | 2020-11-13 | 攀钢集团重庆钛业有限公司 | Surface treatment method of special titanium dioxide for high-covering-power papermaking |
| CN112143262A (en) * | 2020-10-09 | 2020-12-29 | 安徽金星钛白（集团）有限公司 | Rare earth composite coated titanium dioxide and preparation method and application thereof |
| CN112175420A (en) * | 2020-10-09 | 2021-01-05 | 安徽金星钛白（集团）有限公司 | Rutile type titanium dioxide crude product with high light resistance and preparation method and application thereof |
| CN115594994A (en) * | 2022-10-25 | 2023-01-13 | 攀钢集团攀枝花钢铁研究院有限公司（Cn） | Preparation method of special titanium dioxide for high-gloss ink |
| CN115627085A (en) * | 2022-11-07 | 2023-01-20 | 攀钢集团重庆钒钛科技有限公司 | Chemical fiber titanium dioxide and preparation method thereof |
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| CN112175420A (en) * | 2020-10-09 | 2021-01-05 | 安徽金星钛白（集团）有限公司 | Rutile type titanium dioxide crude product with high light resistance and preparation method and application thereof |
| CN115594994A (en) * | 2022-10-25 | 2023-01-13 | 攀钢集团攀枝花钢铁研究院有限公司（Cn） | Preparation method of special titanium dioxide for high-gloss ink |
| CN115594994B (en) * | 2022-10-25 | 2024-03-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of titanium dioxide special for high-gloss printing ink |
| CN115627085A (en) * | 2022-11-07 | 2023-01-20 | 攀钢集团重庆钒钛科技有限公司 | Chemical fiber titanium dioxide and preparation method thereof |
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