CN115819004A - Novel core-coated titanium dioxide and preparation method thereof - Google Patents
Novel core-coated titanium dioxide and preparation method thereof Download PDFInfo
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- CN115819004A CN115819004A CN202211702591.8A CN202211702591A CN115819004A CN 115819004 A CN115819004 A CN 115819004A CN 202211702591 A CN202211702591 A CN 202211702591A CN 115819004 A CN115819004 A CN 115819004A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 239000011268 mixed slurry Substances 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- KIUKXJAPPMFGSW-DNGZLQJQSA-N (2S,3S,4S,5R,6R)-6-[(2S,3R,4R,5S,6R)-3-Acetamido-2-[(2S,3S,4R,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 KIUKXJAPPMFGSW-DNGZLQJQSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 229920002674 hyaluronan Polymers 0.000 claims description 2
- 229960003160 hyaluronic acid Drugs 0.000 claims description 2
- 239000012463 white pigment Substances 0.000 abstract description 5
- 235000010215 titanium dioxide Nutrition 0.000 description 25
- 230000001276 controlling effect Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000002928 artificial marble Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
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- Inorganic Compounds Of Heavy Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses a novel core titanium dioxide, which is prepared from TiO 2 And BaSO 4 Is prepared from BaSO 4 The core is coated with TiO outside 2 The core titanium dioxide component is TiO 2 .BaSO 4 3H2O. The method for preparing the core titanium dioxide comprises the following steps: (1) Preparation of TiO 2 Fine raw material pulp; (2) Preparation of BaSO 4 Fine raw material pulp; (3) preparing finished product slurry; (4) preparing finished dry powder; and (5) preparing a finished product material. The core titanium dioxide of the invention can keep the good performance of the titanium dioxide as white pigment.
Description
Technical Field
The invention relates to a pigment raw material, in particular to novel core-coated titanium dioxide and a preparation method of the novel core-coated titanium dioxide.
Background
Titanium dioxide is used as a pigment raw material and is widely used in the production of water-based building coatings, powder coatings, low-end PVC pipe fittings, pipelines and inorganic artificial marbles.
The existing titanium dioxide finished product is a mixture formed by stirring and mixing more than two materials by taking titanium dioxide as a main material, is generally called coupling or compounding, is prepared by various types of stirrers or jet mills, belongs to a physical dry production process in the process and is prepared by physically mixing solid-phase mechanical force. The titanium dioxide product has the defects that: disordered ordering, uneven particle size distribution, poor dispersibility, obvious reduction of indexes in aspects of whiteness, glossiness, covering power, oil absorption value, dispersibility and the like, and incapability of keeping the excellent performance of the titanium dioxide as a white pigment.
Disclosure of Invention
The invention aims to provide novel core-coated titanium dioxide and a preparation method thereof, so that the good performance of the titanium dioxide as a white pigment can be maintained.
In order to solve the technical problem, the novel TiO for the core titanium dioxide of the invention 2 And BaSO 4 Is prepared from BaSO 4 The core is coated with TiO outside 2 The core titanium dioxide component is TiO 2 .BaSO 4 .3H2O。
The method for preparing the novel core-coated titanium dioxide comprises the following steps:
(1) Preparation of TiO 2 Fine raw material slurry, namely adding TiO with the solid content of 60 percent 2 Adding 1.5-3 per mill dispersant by mass into the slurry, and stirring for 20-30 min; grinding with a horizontal mill to obtain TiO 2 The fineness of the slurry is more than or equal to 98.5 percent when the fineness is-2 um;
(2) Preparation of BaSO 4 Fine raw material pulp ofBaSO with solid content of 60% 4 Adding 1.5-3 per mill of dispersant into the slurry, and stirring for 20-30 min; grinding with a horizontal mill to obtain BaSO 4 The fineness of the slurry is 78-86 percent when the particle size is-2 um;
(3) Preparing finished product slurry by mixing TiO 2 Fine raw material slurry and BaSO 4 Stirring and mixing the fine raw material slurry for 10-15 minutes according to the weight ratio of 70; grinding with horizontal mill, adding 0.5-1 ‰ modified auxiliary agent, controlling fineness of slurry at-2 um not less than 98%, scanning inside electron microscope, and scanning TiO line 2 And BaSO 4 The curves are parallel or partially intersected, the distribution in the electron microscope picture is uniform, and the BaSO 4 The core is coated with TiO outside 2 And form a new hydroxyl chemical bond;
(4) Preparing dry powder, namely atomizing the obtained slurry of the finished product under the pressure of more than 0.4kpa, wherein the atomization rate is more than or equal to 98%, feeding the atomized slurry into a drying tower for drying, controlling the temperature of the drying tower between 350 and 450 ℃, and controlling the temperature by a negative pressure fan or a gas fan, wherein the water content of the dry powder of the finished product is less than or equal to 0.5%;
(5) And (3) preparing finished product materials, namely feeding the obtained finished product dry powder into a depolymerization and scattering machine for depolymerization and scattering, wherein the rotating speed of a motor is more than or equal to 1200 revolutions, and the grain diameter of the finished product materials is more than or equal to 98 mu m.
And (3) in the step (1) and the step (2), the slurry is pumped into a horizontal mill through a metering diaphragm pump, 3 medium balls with the diameters of 3.2mm, 1.5mm and 0.8mm are arranged in the mill, the weight ratio of the 3 medium balls is 3.
And (3) pumping the mixed slurry into a horizontal mill by using a metering diaphragm pump, wherein the two mills are connected in series, a modification auxiliary agent is added into the first mill, the inside of the mill is provided with 3 medium balls, the diameters of the medium balls are respectively 3.2mm, 1.5mm and 0.8mm, the weight ratio of the 3 medium balls is 3.
And (5) sending the obtained finished product dry powder into a depolymerization and scattering machine to scatter and scatter, and adjusting scattering and scattering effects by adjusting an air opening, wherein the particle size of the finished product material is more than or equal to 98 percent below-2 mu m.
The dispersant is sodium hexametaphosphate.
The modified auxiliary agent is formed by mixing sodium polyacrylate and hyaluronic acid in equal parts.
The titanium dioxide of the invention is a novel core titanium dioxide, and the ingredient is TiO 2 .BaSO 4 3H2O, prepared by the method of the invention, namely liquid phase mechanical force plus chemical method. The method of the invention is a physical and chemical wet production process. The key technology of the invention is a raw material formula and a wet preparation combined natural gas burning explosion baking drying process. In wet grinding, molecules are dispersed and homogenized under the action of liquid-phase mechanical force, agglomerated molecules are divided into a plurality of small molecules under the action of chemical force of a dispersing agent and a modification auxiliary agent, the activity of the molecules is enhanced, the molecules are interpenetrated, inlaid, coated and reacted to crack, and a multi-component new substance is formed by a screening process, and a new stable chemical bond is formed among the molecules when the observation is carried out on a microstructure which is amplified by more than 3.5 ten thousand times. The titanium white pigment has the characteristics of narrow particle size distribution, uniform distribution, small particle size and low oil absorption value, completely has and maintains the good performance of the white pigment of the titanium white, and overcomes the defects of the prior art.
The core titanium dioxide can be applied to flat and matte water-based building coatings and powder coatings, low-end PVC pipe pipelines and inorganic artificial marble, and can be replaced with the titanium dioxide 1. When in use, the resin can be mixed with resin dry powder or liquid containing plasticizer.
The core titanium dioxide of the invention has the main advantages that: high thermal stability, low hygroscopicity, low oil absorption, low antioxidant reactivity, good dry powder fluidity, good compatibility with plastic resin, rapid and complete dispersion, and reduced generation of pores due to water evaporation during high temperature extrusion.
Through experimental detection, the main technical indexes of the core titanium dioxide completely meet the purposes of the invention: 99.38% of dry particle size of <2 mu m, 94.89% of whiteness, 23.3g of oil absorption, and 1.39 of a spectrophotometer L99.13, a-0.47 and b. See table below:
drawings
FIG. 1 is a molecular structure state diagram of the core titanium dioxide of the present invention under an electron microscope of 3.5 ten thousand times.
Detailed Description
The method of the present invention is described in detail below.
The TiO for the core titanium dioxide of the invention 2 And BaSO 4 Is prepared from BaSO 4 The core is coated with TiO outside 2 The core titanium dioxide component is TiO 2 .BaSO 4 3H2O. The molecular structure state of the core titanium dioxide of the invention is shown in figure 1.
The preparation method comprises the following steps:
(1) Preparation of TiO 2 Fine raw material slurry, tiO with solid content of 60% 2 Adding 1.5-3 per mill dispersant by mass into the slurry, and stirring for 20-30 min; grinding with a horizontal grinder to obtain TiO 2 The fineness of the slurry is more than or equal to 98.5 percent when the particle size is-2 mu m;
(2) Preparation of CaCO3 Fine stock slurry BaSO with a solids content of 60% 4 Adding 1.5-3 per mill of dispersant into the slurry, and stirring for 20-30 min; grinding with a horizontal mill to obtain BaSO 4 The fineness of the slurry is 78-86 percent when the particle size is-2 um;
(3) Preparing finished product slurry by mixing TiO 2 Fine raw material pulp and BaSO 4 Stirring and mixing the fine raw material slurry for 10-15 minutes according to the weight ratio of 70; grinding with horizontal mill, adding 0.5-1 ‰ modifying additive, controlling fineness of slurry to-2 μm or more than 98%, scanning inside electron microscope, and scanning TiO inside 2 And BaSO 4 The curves are parallel or partially intersected, the distribution in the electron microscope picture is uniform, and the BaSO 4 The core is coated with TiO outside 2 And form a new hydroxyl chemical bond;
(4) Preparing dry powder, namely atomizing the obtained finished product slurry under the pressure of more than 0.4kpa, wherein the atomization rate is more than or equal to 98%, feeding the atomized slurry into a drying tower for drying, controlling the temperature of the drying tower between 350 and 450 ℃, regulating and controlling the temperature by a negative pressure fan or a gas fan, and controlling the water content of the finished product dry powder to be less than or equal to 0.5%;
(5) And (3) preparing finished product materials, namely feeding the obtained finished product dry powder into a depolymerization and scattering machine for depolymerization and scattering, wherein the rotating speed of a motor is more than or equal to 1200 revolutions, and the grain diameter of the finished product materials is more than or equal to 98 mu m.
And (2) separately pumping the slurry into a horizontal mill through a metering diaphragm pump, wherein 3 medium balls with the diameters of 3.2mm, 1.5mm and 0.8mm are arranged in the mill, the weight ratio of the 3 medium balls is 3.
And (3) pumping the mixed slurry into a horizontal mill by using a metering diaphragm pump, wherein the mills are two mills connected in series, a modification auxiliary agent is added into the first mill, the inside of the mill is provided with 3 medium balls, the diameters of the medium balls are respectively 3.2mm, 1.5mm and 0.8mm, the weight ratio of the 3 medium balls is 3.
And (5) sending the obtained finished product dry powder into a depolymerization and scattering machine to scatter and scatter, and adjusting the scattering and scattering effect by adjusting an air opening, wherein the particle size of the finished product material is more than or equal to 98 percent below-2 mu m.
The dispersant is sodium hexametaphosphate.
The modifying assistant is prepared by mixing sodium polyacrylate and stearic acid in equal parts.
Claims (7)
1. A novel core-coated titanium dioxide is characterized in that: the novel core-coated titanium dioxide is TiO 2 And BaSO 4 Is prepared from BaSO 4 The core is coated with TiO outside 2 The core titanium dioxide is TiO 2 .BaSO 4 .3H2O。
2. A method for preparing novel core titanium dioxide is characterized by comprising the following steps:
(1) Preparation of TiO 2 Fine raw material slurry, tiO with solid content of 60% 2 Adding 1.5-3 per mill dispersant by mass into the slurry, and stirring for 20-30 min; horizontal grinderGrinding to make TiO 2 The fineness of the slurry is more than or equal to 98.5 percent when the particle size is-2 mu m;
(2) Preparation of BaSO 4 Fine raw material slurry, baSO with solid content of 60% 4 Adding 1.5-3 per mill of dispersant into the slurry, and stirring for 20-30 min; grinding with a horizontal mill to obtain BaSO 4 The fineness of the slurry is 78-86 percent when the particle size is-2 um;
(3) Preparing finished product slurry by mixing TiO 2 Fine raw material slurry and BaSO 4 Stirring and mixing the fine raw material slurry for 10-15 minutes according to the weight ratio of 70; grinding with horizontal mill, adding 0.5-1 ‰ modified auxiliary agent, controlling fineness of slurry at-2 um not less than 98%, scanning inside electron microscope, and scanning TiO line 2 And BaSO 4 The curves are parallel or partially intersected, the distribution in the electron microscope picture is uniform, and the BaSO 4 The core is coated with TiO outside 2 And form a new hydroxyl chemical bond;
(4) Preparing dry powder, namely atomizing the obtained slurry of the finished product under the pressure of more than 0.4kpa, wherein the atomization rate is more than or equal to 98%, feeding the atomized slurry into a drying tower for drying, controlling the temperature of the drying tower between 350 and 450 ℃, and controlling the temperature by a negative pressure fan or a gas fan, wherein the water content of the dry powder of the finished product is less than or equal to 0.5%;
(5) And (3) preparing finished product materials, namely feeding the obtained finished product dry powder into a depolymerization and scattering machine for depolymerization and scattering, wherein the rotating speed of a motor is more than or equal to 1200 revolutions, and the grain diameter of the finished product materials is more than or equal to 98 mu m.
3. A method according to claim 2, characterized in that: and (3) in the step (1) and the step (2), the slurry is pumped into a horizontal mill through a metering diaphragm pump, 3 medium balls with the diameters of 3.2mm, 1.5mm and 0.8mm are arranged in the mill, the weight ratio of the 3 medium balls is 3.
4. A method according to claim 2, characterized in that: and (3) pumping the mixed slurry into a horizontal mill by using a metering diaphragm pump, wherein the two mills are connected in series, a modification additive is added into the first mill, the inside of the mill is provided with 3 media balls, the diameters of the media balls are respectively 3.2mm, 1.5mm and 0.8mm, the weight ratio of the 3 media balls is 3.
5. A method according to claim 2, characterized in that: and (5) sending the obtained finished product dry powder into a depolymerization and scattering machine to scatter and scatter, and adjusting scattering and scattering effects by adjusting an air opening, wherein the particle size of the finished product material is more than or equal to 98 percent below-2 mu m.
6. A method according to claim 2, characterized in that: the dispersant is sodium hexametaphosphate.
7. A method according to claim 2, characterized in that: the modified auxiliary agent is formed by mixing sodium polyacrylate and hyaluronic acid in equal parts.
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| CN202211702591.8A CN115819004A (en) | 2022-12-29 | 2022-12-29 | Novel core-coated titanium dioxide and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4543689A (en) * | 1988-12-13 | 1990-06-21 | Tioxide Group Plc | Opacifying agent and its preparation |
| CN1724595A (en) * | 2005-07-07 | 2006-01-25 | 北京天之岩健康科技有限公司 | White minera powder TiO2 composite white pigment and its preparation method |
| EP1696004A1 (en) * | 2005-02-24 | 2006-08-30 | A. Schulman Plastics | Oxo-degradability inducing substance |
| CN101250336A (en) * | 2008-04-10 | 2008-08-27 | 上海安亿纳米材料有限公司 | Barium sulfate based polybasic composite white pigments and method for preparing same |
| CN102260422A (en) * | 2010-05-25 | 2011-11-30 | 中国地质大学（北京） | Method for preparing TiO2/powdered quartz composite powder material |
| CN109233340A (en) * | 2018-09-21 | 2019-01-18 | 成都新柯力化工科技有限公司 | A kind of modified barium sulphate composite titanium dioxide and preparation method for coating |
-
2022
- 2022-12-29 CN CN202211702591.8A patent/CN115819004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4543689A (en) * | 1988-12-13 | 1990-06-21 | Tioxide Group Plc | Opacifying agent and its preparation |
| EP1696004A1 (en) * | 2005-02-24 | 2006-08-30 | A. Schulman Plastics | Oxo-degradability inducing substance |
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| CN102260422A (en) * | 2010-05-25 | 2011-11-30 | 中国地质大学（北京） | Method for preparing TiO2/powdered quartz composite powder material |
| CN109233340A (en) * | 2018-09-21 | 2019-01-18 | 成都新柯力化工科技有限公司 | A kind of modified barium sulphate composite titanium dioxide and preparation method for coating |
Non-Patent Citations (2)
| Title |
|---|
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