CN113533137A - Method for testing oil absorption of titanium dioxide - Google Patents
Method for testing oil absorption of titanium dioxide Download PDFInfo
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- CN113533137A CN113533137A CN202110728022.XA CN202110728022A CN113533137A CN 113533137 A CN113533137 A CN 113533137A CN 202110728022 A CN202110728022 A CN 202110728022A CN 113533137 A CN113533137 A CN 113533137A
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- titanium dioxide
- oil absorption
- testing
- viscosity value
- oil
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 57
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000003921 oil Substances 0.000 claims abstract description 57
- 235000019198 oils Nutrition 0.000 claims abstract description 57
- 235000021388 linseed oil Nutrition 0.000 claims abstract description 25
- 239000000944 linseed oil Substances 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000004537 pulping Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000001038 titanium pigment Substances 0.000 claims abstract description 3
- 239000006185 dispersion Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 40
- 238000004898 kneading Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention belongs to the technical field of titanium dioxide production, and particularly discloses a method for testing oil absorption of titanium dioxide, which comprises the following steps: 1) mixing a plurality of titanium pigment with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain pulp, and testing the viscosity value of each pulp; 2) fitting a relational expression of the viscosity value and the oil absorption of each slurry according to the viscosity value and the oil absorption of each slurry; 3) testing the viscosity value of the titanium dioxide to be tested under the same condition as the step 1); 4) and (3) substituting the viscosity value of the titanium dioxide to be detected into the relational expression obtained in the step 2) to obtain the oil absorption of the titanium dioxide to be detected. The method can reduce the test error caused by manual operation in the test process, improve the test reproducibility, shorten the test time and reduce the test labor intensity.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a method for testing oil absorption of titanium dioxide.
Background
At present, the oil absorption test methods of titanium dioxide mainly comprise two methods: one is the adjustable cutter kneading method: weighing 10g of a test sample (accurate to 0.1g) in titanium dioxide, placing on a flat plate, dropwise adding refined linseed oil by using a burette, wherein the oil adding amount is not more than 10 drops each time, after the addition is finished, pressing and grinding by using an adjustable knife to enable oil to permeate into the test sample, and continuously dropwise adding at the speed until the oil and the test sample form a block. From this moment, each drop is added and then the mixture is fully ground by a knife, and when the mixture is formed into a paste with uniform consistency, the paste is just not cracked and broken and can be adhered to a flat plate, the end point is obtained. The oil consumption is recorded and the whole operation should be completed within 20-25 min.
The second method is the Gardner-Coleman method: adding titanium dioxide into a glass cup, slowly dripping refined linseed oil, kneading by using a knife or a glass rod, and obtaining the end point when the paste can flow into a mass.
The existing method for testing oil absorption by titanium dioxide has long testing time and low testing precision, because the factors influencing the accuracy of the test are more, such as the force intensity of operators, the time length, the judgment of a terminal point, the quality of linseed oil and the like all influence the test result.
Disclosure of Invention
Aiming at the situations in the prior art, the invention aims to provide a method for testing the oil absorption of titanium dioxide, which can reduce the test error caused by manual operation in the test process, improve the test reproducibility, shorten the test time and reduce the test labor intensity.
The oil absorption of the titanium dioxide is the oil absorption capacity of the titanium dioxide, and the higher the oil absorption, the larger the oil absorption capacity. The linseed oil is adopted in the traditional oil absorption test method, the linseed oil is also adopted in the invention, and the adsorption capacity of the titanium dioxide is consistent. Titanium dioxide with different oil absorption contents is uniformly dispersed in linseed oil according to the same solid content, if the oil absorption of the titanium dioxide is high, more linseed oil can be adsorbed in the titanium dioxide, and the free linseed oil in a dispersion system is reduced. The dispersion has a reduced content of free solvent and a high viscosity of the dispersion is ensured. From experimental data, the viscosity data obtained by adjusting factors such as solid content, dispersion strength and the like of the titanium dioxide has a linear relation with oil absorption. Based on the method, the oil absorption of the titanium dioxide is provided.
The invention provides a method for testing oil absorption of titanium dioxide, which comprises the following steps:
1) mixing a plurality of titanium pigment with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain pulp, and testing the viscosity value of each pulp;
2) fitting a relational expression of the viscosity value and the oil absorption of each slurry according to the viscosity value and the oil absorption of each slurry;
3) testing the viscosity value of the titanium dioxide to be tested under the same condition as the step 1);
4) and (3) substituting the viscosity value of the titanium dioxide to be detected into the relational expression obtained in the step 2) to obtain the oil absorption of the titanium dioxide to be detected.
According to the invention, the oil absorption of the titanium dioxide with known oil absorption can be obtained by adopting the traditional knife-adjusting kneading method, and the oil absorption of various titanium dioxides has gradient. Refined linseed oil is a specific product name and is commercially available.
Preferably, the refined linseed oil is stirred for primary dispersion, then the titanium dioxide is added, and the slurry is obtained after pulping and dispersion. Stirring and beating dispersion are carried out by adopting a high-speed dispersion machine.
According to the invention, the mixing of the titanium dioxide and the refined linseed oil is completed in a container, and the container can control the temperature of the slurry to be 5-30 ℃ and the volume to be 100-1000 mL.
In the invention, the mass ratio of the refined linseed oil to the titanium dioxide is 0.5-5: 1.
Preferably, the stirring speed for the primary dispersion of the refined linseed oil is 300-600 r/min.
Preferably, the adding time of the titanium dioxide is within 1min, the stirring speed of the pulping and dispersing is 1000-2000r/min, and the dispersing time is 3-20 min.
According to the invention, the viscosity value of the slurry is tested within 2min after the slurry is obtained. The viscosity values of the slurries were measured using a rotary viscometer.
In addition, the relational expression between the viscosity value and the oil absorption of the pulp is influenced by the proportion of the titanium dioxide and the refined linseed oil, the size of a dispersion container, the dispersion strength, the temperature and other factors. Therefore, the titanium dioxide to be measured needs to be measured by the same method for obtaining the relational expression, and the viscosity value is substituted into the relational expression, so that the accurate oil absorption value of the titanium dioxide can be obtained.
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:
the method adopts instruments such as a high-speed dispersion machine, a rotary viscometer and the like to operate, and solves the problem of test errors caused in the operation process of different operators by fixing instrument parameters. And the oil absorption test range can be adjusted by adjusting the proportion of the refined linseed oil to the titanium dioxide.
Drawings
FIG. 1 is a plot of the oil absorption and viscosity values fitted to samples 1-5 from example 1.
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
The viscosity values of titanium dioxide samples 1, 2, 3, 4 and 5 with known oil absorption were measured by the following methods.
The specific method comprises the following steps: 1. accurately weighing 210g of refined linseed oil, pouring the refined linseed oil into a 500mL container, placing the container on a high-speed dispersion machine, fixing the container by using a clamp, starting the dispersion machine, and primarily dispersing the linseed oil at the rotation speed of 500 r/min; 2. accurately weighing 140g of titanium dioxide sample with known oil absorption, slowly pouring the titanium dioxide into the refined linseed oil by using a knife, wherein the addition of the titanium dioxide is completed within 1 min; 3. increasing the rotating speed of the dispersion machine to 1500r/min, and timing for 10 min; 4. and after the dispersion is finished, taking down the slurry, and testing the viscosity value of the slurry by using a rotary viscometer, wherein the step is finished within 2 min.
The oil absorption and viscosity values of samples 1 to 5 are shown in table 1, and the relationship between the oil absorption and viscosity values is fitted as y-447.28 x-4746.8, and a specific fitting curve is shown in fig. 1.
And measuring the viscosity value of the titanium dioxide sample A to be measured by adopting the method, wherein the viscosity value is 1020mPa & s, and substituting the viscosity value into the relational expression to obtain the titanium dioxide sample A with the oil absorption of 12.893g/100 g.
TABLE 1
| Sample (I) | Sample 1 | Sample 2 | Sample 3 | Sample No. 4 | Sample No. 5 |
| Oil absorption (g/100g) | 12.6 | 14.5 | 16.3 | 17.5 | 20.2 |
| Viscosity (mPa. s) | 980 | 1600 | 2680 | 2920 | 4360 |
Example 2
And (3) measuring the viscosity value of the titanium dioxide sample B to be measured by adopting the method in the embodiment 1, wherein the viscosity value is 3900mPa & s, and substituting the viscosity value into the relational expression obtained in the embodiment 1 to obtain the oil absorption of 19.332g/100 g.
Example 3
And (3) measuring the viscosity value of the titanium dioxide sample C to be measured by adopting the method in the embodiment 1, wherein the viscosity value is 2470mPa & s, and substituting the viscosity value into the relational expression obtained in the embodiment 1 to obtain the oil absorption of 16.135g/100 g.
The oil absorption of the titanium dioxide sample A, B, C was measured by the conventional knife-kneading method, and the obtained oil absorption values are shown in table 2.
TABLE 2
As can be seen from Table 2, the oil absorption measured by the method of the present invention is close to the value obtained by the knife-adjusting kneading method, and the requirement of the titanium dioxide industry on the accuracy of oil absorption index testing can be satisfied within the normal testing error range.
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 (6)
1. A method for testing oil absorption of titanium dioxide is characterized by comprising the following steps:
1) mixing a plurality of titanium pigment with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain pulp, and testing the viscosity value of each pulp;
2) fitting a relational expression of the viscosity value and the oil absorption of each slurry according to the viscosity value and the oil absorption of each slurry;
3) testing the viscosity value of the titanium dioxide to be tested under the same condition as the step 1);
4) and (3) substituting the viscosity value of the titanium dioxide to be detected into the relational expression obtained in the step 2) to obtain the oil absorption of the titanium dioxide to be detected.
2. The method for testing oil absorption of titanium dioxide according to claim 1, wherein the refined linseed oil is stirred to carry out preliminary dispersion, and then the titanium dioxide is added, and the slurry is obtained by pulping and dispersion.
3. The method for testing oil absorption of titanium dioxide according to claim 1 or 2, wherein the mass ratio of the refined linseed oil to the titanium dioxide is 0.5-5: 1.
4. The method for testing oil absorption of titanium dioxide according to claim 2, wherein the stirring speed of the refined linseed oil in the preliminary dispersion is 300-600 r/min.
5. The method for testing oil absorption of titanium dioxide according to claim 2, wherein the titanium dioxide is added within 1min, the stirring speed for the pulping and dispersing is 1000-2000r/min, and the dispersing time is 3-20 min.
6. The method for testing oil absorption of titanium dioxide according to claim 1, wherein the testing of the viscosity value of the slurry is completed within 2min after the slurry is obtained.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199712A (en) * | 2021-11-26 | 2022-03-18 | 金三江(肇庆)硅材料股份有限公司 | Method for measuring oil absorption value of silicon dioxide |
| CN114323855A (en) * | 2021-12-28 | 2022-04-12 | 攀枝花东方钛业有限公司 | Sample preparation method for titanium dioxide papermaking application evaluation method |
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| DE3606356A1 (en) * | 1986-02-27 | 1987-09-03 | Huels Chemische Werke Ag | Process for measuring the oil absorption capacity of rubber powder batch |
| JP2005114469A (en) * | 2003-10-06 | 2005-04-28 | National Printing Bureau | Oil absorbency testing method of paper and oil absorbency tester of paper |
| JP2015076278A (en) * | 2013-10-09 | 2015-04-20 | 株式会社豊田自動織機 | Device for producing slurry for electrode |
| CN105223308A (en) * | 2015-09-06 | 2016-01-06 | 青岛科技大学 | A kind of white carbon oil absorption detection method |
| CN106706887A (en) * | 2016-12-19 | 2017-05-24 | 中国石油天然气股份有限公司 | Measuring method of solvent concentration in thickened oil |
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- 2021-06-29 CN CN202110728022.XA patent/CN113533137B/en active Active
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| DE3606356A1 (en) * | 1986-02-27 | 1987-09-03 | Huels Chemische Werke Ag | Process for measuring the oil absorption capacity of rubber powder batch |
| JP2005114469A (en) * | 2003-10-06 | 2005-04-28 | National Printing Bureau | Oil absorbency testing method of paper and oil absorbency tester of paper |
| JP2015076278A (en) * | 2013-10-09 | 2015-04-20 | 株式会社豊田自動織機 | Device for producing slurry for electrode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114323855A (en) * | 2021-12-28 | 2022-04-12 | 攀枝花东方钛业有限公司 | Sample preparation method for titanium dioxide papermaking application evaluation method |
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| CN113533137B (en) | 2024-03-12 |
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