CN113533137B - Titanium dioxide oil absorption testing method - Google Patents
Titanium dioxide oil absorption testing method Download PDFInfo
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- CN113533137B CN113533137B CN202110728022.XA CN202110728022A CN113533137B CN 113533137 B CN113533137 B CN 113533137B CN 202110728022 A CN202110728022 A CN 202110728022A CN 113533137 B CN113533137 B CN 113533137B
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- titanium dioxide
- oil absorption
- slurry
- viscosity value
- testing
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 56
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 239000003921 oil Substances 0.000 claims abstract description 55
- 235000019198 oils Nutrition 0.000 claims abstract description 55
- 235000021388 linseed oil Nutrition 0.000 claims abstract description 26
- 239000000944 linseed oil Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 24
- 238000004537 pulping Methods 0.000 claims abstract description 4
- 239000006185 dispersion Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 5
- 238000010009 beating Methods 0.000 claims description 4
- 239000001038 titanium pigment Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 39
- 238000004898 kneading Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- 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 titanium dioxide oil absorption testing method, which comprises the following steps: 1) Mixing various titanium dioxide with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain slurries, and testing the viscosity value of each slurry; 2) Fitting a relation between 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) bringing the viscosity value of the titanium dioxide to be measured into the relational expression obtained in the step (2) to obtain the oil absorption of the titanium dioxide to be measured. The method can reduce the test error caused by manual operation in the test process, improve the test reproducibility, shorten the test time and lighten the test labor intensity.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a titanium dioxide oil absorption testing method.
Background
At present, the titanium dioxide oil absorption test method mainly comprises two methods: one is a knife-adjusting kneading method: weighing 10g of sample (quasi-0.1 g) on a flat plate, dripping refined linseed oil by a burette, wherein the oiling amount is not more than 10 drops each time, and grinding by an adjusting knife after finishing adding, so that the oil permeates into the sample to be tested, and continuously dripping the sample and the oil at the speed until the oil and the sample form a block. From this point on, after each drop is added, the paste is fully ground by a knife, and when the paste is formed to have uniform consistency, the paste is just not cracked and broken, and can be adhered to a flat plate, the paste is the end point. The oil consumption was recorded and the entire operation was completed within 20-25 min.
The second method is the Gardner-Coleman method: adding titanium white into a glass cup, slowly dripping refined linseed oil, and kneading by a cutter or a glass rod, wherein the end point is when paste can flow and agglomerate.
The existing method for testing the oil absorption of the titanium dioxide is long in testing time and low in testing precision, and because more factors influence testing accuracy, such as the force intensity of operators, the time duration, the judgment of the end point, the quality of linseed oil and the like can influence the testing result.
Disclosure of Invention
Aiming at the conditions existing in the prior art, the invention aims to provide the titanium dioxide oil absorption testing method which can reduce testing errors caused by manual operation in the testing process, improve testing reproducibility, shorten testing time and lighten testing labor intensity.
The oil absorption of titanium dioxide is the ability of titanium dioxide to absorb grease, and the higher the oil absorption is, the larger the amount of absorbed grease is. The traditional oil absorption testing method adopts linseed oil, and the invention also adopts linseed oil, so that the adsorption capacity of titanium dioxide is consistent. The titanium dioxide with different oil absorption amounts is uniformly dispersed in the linseed oil according to the same solid content, and if the titanium dioxide is high in oil absorption amount, more linseed oil is adsorbed in the titanium dioxide, so that the free linseed oil of a dispersion system is reduced. The reduction of free solvent in the dispersion will certainly result in an increase in the viscosity of the dispersion. From experimental data, the viscosity data and oil absorption obtained by adjusting the solid content, the dispersion strength and other factors of the titanium dioxide have a linear relation. Based on the method, the method for testing 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 various titanium dioxide with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain slurries, and testing the viscosity value of each slurry;
2) Fitting a relation between 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) bringing the viscosity value of the titanium dioxide to be measured into the relational expression obtained in the step (2) to obtain the oil absorption of the titanium dioxide to be measured.
According to the invention, the oil absorption of the titanium dioxide with known oil absorption can be tested by adopting a traditional knife-regulating kneading method, and the oil absorption of various titanium dioxide has gradient. Refined linseed oil is a specific product name and is commercially available.
Preferably, the refined linseed oil is stirred for preliminary dispersion, then titanium dioxide is added, and pulping and dispersing are carried out to obtain slurry. Stirring and beating dispersion are carried out by a high-speed dispersing machine.
According to the invention, the mixing of titanium pigment with refined linseed oil is accomplished in a vessel capable of controlling the slurry temperature at 5-30 ℃ and the volume at 100-1000mL.
In the invention, the mass ratio of the refined linseed oil to the titanium dioxide is 0.5-5:1.
Preferably, the stirring speed of the refined linseed oil at the time of preliminary dispersion is 300-600r/min.
Preferably, the titanium dioxide is added within 1min, the stirring speed of beating and dispersing is 1000-2000r/min, and the dispersing time is 3-20min.
According to the invention, the measurement of the viscosity number of the slurry is completed within 2 minutes after the slurry is obtained. The viscosity value of the slurry was measured using a rotary viscometer.
The relation between the viscosity value of the slurry and the oil absorption is affected by the ratio of titanium white to refined linseed oil, the size of the dispersion vessel, the dispersion strength, the temperature, and the like. Therefore, the viscosity value of the titanium dioxide to be measured is measured by adopting the same method when the relational expression is obtained, and the viscosity value is brought 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:
in the method, instruments such as a high-speed dispersing machine, a rotary viscometer and the like are adopted for operation, and test errors caused in the operation process of different operators are solved by fixing instrument parameters. And the oil absorption testing range can be adjusted by adjusting the proportion of refined linseed oil to titanium dioxide.
Drawings
FIG. 1 is a fitted curve of oil absorption and viscosity values for samples 1-5 of example 1.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments.
Example 1
The viscosity values of titanium dioxide samples 1, 2, 3, 4 and 5, which have known oil absorption, were measured by the following methods, respectively.
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 dispersing machine, fixing the container by using a clamp, starting the dispersing machine, and primarily dispersing the linseed oil at a rotating speed of 500 r/min; 2. accurately weighing 140g of titanium dioxide sample with known oil absorption, slowly pouring titanium dioxide into refined linseed oil by using a cutter adjusting device, and completing the addition of the titanium dioxide within 1 min; 3. the rotating speed of the dispersing machine is increased to 1500r/min, and the time is 10min; 4. after the dispersion is completed, the slurry is taken down, the viscosity value of the slurry is tested by adopting a rotary viscometer, and the step is completed within 2 minutes.
The oil absorption and viscosity values of samples 1-5 are shown in table 1, and the relationship between the oil absorption and viscosity values is fitted to y= 447.28x-4746.8, and a specific fitted curve is shown in fig. 1.
The viscosity value of the titanium dioxide sample A to be tested is measured by adopting the method, the viscosity value is 1020 mPa.s, and the viscosity value is brought into the relational expression, so that the oil absorption of the titanium dioxide sample A to be tested is 12.893g/100g.
TABLE 1
| Sample of | Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 |
| Oil absorption (g/100 g) | 12.6 | 14.5 | 16.3 | 17.5 | 20.2 |
| Viscosity (mPa. S) | 980 | 1600 | 2680 | 2920 | 4360 |
Example 2
The viscosity of the titanium dioxide sample B to be measured was measured by the method of example 1 and found to be 3900 mPa.s, and the viscosity was taken into the relational expression obtained in example 1 to obtain an oil absorption of 19.332g/100g.
Example 3
The viscosity number of the titanium dioxide sample C to be measured was measured by the method of example 1 and was 2470 mPa.s, and the viscosity number was taken into the relational expression obtained in example 1 to obtain an oil absorption of 16.135g/100g.
The oil absorption of the titanium dioxide sample A, B, C is tested by adopting a traditional knife-adjusting 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 invention is close to the value obtained by the regulating knife pinching method, and can meet the test precision requirement of the titanium dioxide industry on the oil absorption index within the normal test error range.
The embodiments of the present invention have been described above, the description is illustrative, 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 described embodiments.
Claims (3)
1. The method for testing the oil absorption of the titanium dioxide is characterized by comprising the following steps of:
1) Mixing various titanium dioxide with known oil absorption with refined linseed oil respectively, pulping and dispersing to obtain slurries, and testing the viscosity value of each slurry; the mass ratio of the refined linseed oil to the titanium dioxide is 0.5-5:1, the adding time of the titanium dioxide is within 1min, the stirring speed of beating and dispersing is 1000-2000r/min, the dispersing time is 3-20min, the testing of the viscosity value of the slurry is completed within 2min after the slurry is obtained, the oil absorption of the titanium dioxide with known oil absorption is tested by adopting a traditional knife-mixing method, the oil absorption of various titanium dioxide has gradients, 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 100-1000mL;
2) Fitting a relation between 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) bringing the viscosity value of the titanium dioxide to be measured into the relational expression obtained in the step (2) to obtain the oil absorption of the titanium dioxide to be measured.
2. The method for measuring the oil absorption of titanium dioxide according to claim 1, wherein refined linseed oil is stirred for preliminary dispersion, titanium dioxide is added, and the slurry is obtained by beating and dispersing.
3. The method for measuring oil absorption of titanium pigment according to claim 2, wherein the stirring speed of the refined linseed oil during the preliminary dispersion is 300-600r/min.
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| 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 | Method for measuring concentration of solvent in thickened oil |
| CN112117432A (en) * | 2019-06-21 | 2020-12-22 | 贝特瑞新材料集团股份有限公司 | Electrode slurry batching method and electrode slurry prepared by same |
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- 2021-06-29 CN CN202110728022.XA patent/CN113533137B/en active Active
Patent Citations (6)
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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 | Method for measuring concentration of solvent in thickened oil |
| CN112117432A (en) * | 2019-06-21 | 2020-12-22 | 贝特瑞新材料集团股份有限公司 | Electrode slurry batching method and electrode slurry prepared by same |
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