CN115537043A - Method for preparing titanium dioxide for papermaking - Google Patents
Method for preparing titanium dioxide for papermaking Download PDFInfo
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- CN115537043A CN115537043A CN202211161194.4A CN202211161194A CN115537043A CN 115537043 A CN115537043 A CN 115537043A CN 202211161194 A CN202211161194 A CN 202211161194A CN 115537043 A CN115537043 A CN 115537043A
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- titanium dioxide
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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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- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Paper (AREA)
Abstract
The invention provides a method for preparing titanium dioxide for papermaking, belonging to the technical field of titanium dioxide, and the method comprises the following steps: preparing rutile type titanium dioxide slurry by sulfuric acid method, adding 0.2-0.9% 50g/L sodium hexametaphosphate into titanium dioxide slurry, adjusting pH to 8-9.5, homogenizing for 15min, adding 1-3.5% 85% concentrated H 3 PO 4 Homogenizing for 15min, adding 3% Al 100g/L 2 (SO 4 ) 3 Homogenizing for 30min, adding 3% of 100g/L Al 2 (SO 4 ) 3 Adding NaOH in parallel with 10 percent, keeping the pH value to be 4.3-4.7, aging for 90min, adjusting the pH value to be 7-7.5, aging for 15min, washing the slurry obtained in the step 6 by a filter press until the slurry is qualified, drying, crushing by a universal crusher, then crushing by airflow to obtain a finished product, and testing related performance. By adding sodium hexametaphosphateCan fully disperse the titanium dioxide slurry without agglomeration, and anions are adhered to the surfaces of titanium dioxide particles to form hydrophilic particles, so that the slurry is suspended, and a set amount of H is added 3 PO 4 The whiteness and the weather resistance of the titanium dioxide are improved, the whitening effect of the paper is higher, and meanwhile, the adhesive force is better.
Description
Technical Field
The invention relates to the technical field of titanium dioxide, in particular to a method for preparing titanium dioxide for papermaking.
Background
Titanium dioxide is a very important white pigment and is widely applied to the industries of paint, plastics, papermaking, printing ink and the like. Paper making is the third largest user of titanium dioxide. Titanium dioxide is used as a paper filler and is mainly used in high-grade paper and thin paper. The titanium dioxide is added into the paper, so that the paper has better whiteness, good gloss, high strength, thinness, smoothness, no penetration during printing and light weight. However, the manufacturing process is the same for any kind of paper, and the main reason for determining which kind of titanium white is selected by the paper mill is the cost of paper making. Therefore, the titanium dioxide with low cost needs to be designed.
Disclosure of Invention
The invention aims to provide a method for preparing titanium dioxide for papermaking, and solves the technical problems of complex preparation process and high cost of the existing titanium dioxide for papermaking.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preparing titanium dioxide for papermaking, comprising the steps of:
step 1: preparing rutile type titanium dioxide slurry by a sulfuric acid method;
step 2: adding 0.2-0.9% of 50g/L sodium hexametaphosphate into the titanium dioxide slurry, adjusting the pH value to 8-9.5, and homogenizing for 15min;
and 3, step 3: adding concentrated H of 85% 1-3.5% 3 PO 4 Homogenizing for 15min;
and 4, step 4: 3% of 100g/L Al is added 2 (SO 4 ) 3 Homogenizing for 30min;
and 5: 3% of 100g/L Al 2 (SO 4 ) 3 Adding NaOH in parallel with 10% of the total amount, keeping the pH at 4.3-4.7, and aging for 90min;
and 6: adjusting pH to 7-7.5, aging for 15min;
and 7: and (4) washing the slurry obtained in the step (6) by a filter press until the slurry is qualified, drying, crushing by a universal crusher, performing jet milling to obtain a finished product, and testing related performances.
Further, the titanium dioxide slurry in the step 1 is TiO 2 The concentration is 200-300g/L, and the slurry temperature is 75-90 ℃.
Further, sodium hexametaphosphate in step 2 is P 2 O 5 0.2-0.9% relative to TiO in the slurry 2 And (6) counting.
Further, in step 3, 1-3.5% is relative to TiO in the slurry 2 Meter H 3 PO 4 With P 2 O 5 And (6) counting.
Further, in step 4, al 2 (SO 4 ) 3 With Al 2 O 3 3% is relative to TiO in the slurry 2 And (6) counting.
Further, in step 5, thixotropy is easily generated by starting the formation of pseudo-boehmite type at pH3.5 to 4.5 and pH more than 5 at the time of precipitation of amorphous aluminum hydroxide, and pH not more than 5.
Further, in the step 7, the resistivity of the slurry qualified by water washing is larger than 90 omega.m, and then the slurry is dried for 8-12h by a drying oven at 105-140 ℃.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the invention, titanium dioxide slurry can be fully dispersed without agglomeration by adding sodium hexametaphosphate, anions are adhered to the surfaces of titanium dioxide particles to form hydrophilic particles so as to suspend the slurry, and a set amount of H is added 3 PO 4 The whiteness and the weather resistance of the titanium dioxide are improved, the whitening effect of the paper is higher, and the adhesive force is better.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Example 1:
a method for preparing titanium dioxide for papermaking, comprising the steps of:
step 1: the concentration of the sulfuric acid process rutile type titanium dioxide slurry is 200-300g/L, and the temperature of the slurry is 75-90 ℃.
Step 2: adding 50g/L sodium hexametaphosphate (in terms of P) in 10min 2 O 5 Calculated) 0.2% (relative to the TiO in the slurry) 2 Metering) and adjusting the pH value to 8-9.5, and homogenizing for 15min.
And step 3: adding 85% concentrated H in 15min 3 PO 4 (with P) 2 O 5 Calculated as 1% (relative to TiO in the slurry) 2 Meter), homogenize for 15min.
And 4, step 4: slowly (15 min) adding 100g/L Al 2 (SO 4 ) 3 (with Al) 2 O 3 Calculated) 3% (relative to the TiO in the slurry) 2 Meter), homogenized for 30min.
And 5: adding 100g/L Al for 30min 2 (SO 4 ) 3 (with Al) 2 O 3 Calculated as) 3% (relative to TiO in the slurry) 2 Calculated) was added co-currently with 10% naoh and kept pH =4.5 (± 0.2) for aging for 90min. ( The pH value of the amorphous aluminum hydroxide precipitate is 3.5-4.5; the onset of the pseudoboehmite type at a pH of more than 5 readily brings about thixotropy )
And 6: adjusting pH according to customer's needs, adjusting pH to 7-7.5 for 30min, and aging for 15min.
And 7: washing the slurry with water by a filter press until the resistivity is qualified (more than 90 omega. M), drying for 8-12h by a drying oven at 105-140 ℃, crushing by a universal crusher, and then crushing by airflow to obtain the finished product. And (6) testing the relevant performance.
Example 2:
a method for preparing titanium dioxide for papermaking, comprising the steps of:
step 1: the concentration of the sulfuric acid process rutile type titanium dioxide slurry is 200-300g/L, and the temperature of the slurry is 75-90 ℃.
And 2, step: adding 50g/L sodium hexametaphosphate (in terms of P) in 10min 2 O 5 Calculated) 0.9% (relative to the TiO in the slurry) 2 Gauge) and adjust pH to 8E9.5, homogenizing for 15min.
And step 3: adding 85% concentrated H in 15min 3 PO 4 (with P) 2 O 5 Calculated) 3.5% (relative to the TiO in the slurry) 2 Meter), homogenized for 15min.
And 4, step 4: slowly (15 min) adding 100g/L Al 2 (SO 4 ) 3 (with Al) 2 O 3 Calculated) 3% (relative to the TiO in the slurry) 2 Metering), homogenizing for 30min;
and 5: adding 100g/L Al for 30min 2 (SO 4 ) 3 (with Al) 2 O 3 Calculated as) 3% (relative to TiO in the slurry) 2 Calculated) was added co-currently with 10% naoh and kept pH =4.5 (± 0.2) for aging for 90min. ( The pH value of the amorphous aluminum hydroxide precipitate is 3.5-4.5; the onset of the pseudoboehmite type at a pH of more than 5 readily brings about thixotropy )
And 6: adjusting pH according to customer's needs, adjusting pH to 7-7.5 for 30min, aging for 15min,
and 7: washing the slurry with water by a filter press until the resistivity is qualified (more than 90 omega. M), drying for 8-12h by a drying oven at 105-140 ℃, crushing by a universal crusher, and then crushing by airflow to obtain the finished product. And (6) testing the relevant performance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A method for preparing titanium dioxide for papermaking is characterized in that: the method comprises the following steps:
step 1: preparing rutile type titanium dioxide slurry by a sulfuric acid method;
step 2: adding 0.2-0.9% of 50g/L sodium hexametaphosphate into the titanium dioxide slurry, adjusting the pH value to 8-9.5, and homogenizing for 15min;
and step 3: adding concentrated H of 85% 1-3.5% 3 PO 4 Homogenizing for 15min;
and 4, step 4: 3% of 100g/L Al is added 2 (SO 4 ) 3 Homogenizing for 30min;
and 5: 3% of 100g/L Al 2 (SO 4 ) 3 Adding NaOH in parallel with 10% of the total amount, keeping the pH at 4.3-4.7, and aging for 90min;
and 6: adjusting pH to 7-7.5, aging for 15min;
and 7: and (5) washing the slurry obtained in the step (6) by a filter press until the slurry is qualified, drying, crushing by a universal crusher, crushing by airflow to obtain a finished product, and testing related performances.
2. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: titanium dioxide slurry in step 1 is TiO 2 The concentration is 200-300g/L, and the slurry temperature is 75-90 ℃.
3. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: in step 2, the sodium hexametaphosphate is P 2 O 5 0.2-0.9% by weight of TiO in the slurry 2 And (6) counting.
4. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: in step 3, 1-3.5% is relative to the TiO in the slurry 2 Meter, H 3 PO 4 With P 2 O 5 And (6) counting.
5. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: in step 4, al 2 (SO 4 ) 3 With Al 2 O 3 3% is relative to TiO in the slurry 2 And (6) counting.
6. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: in step 5, the amorphous aluminum hydroxide is precipitated at a pH of 3.5 to 4.5, and at a pH of more than 5, a pseudo-boehmite type begins to form, which is liable to cause thixotropy, and at a pH of not more than 5.
7. The method for preparing titanium dioxide for papermaking according to claim 1, wherein the method comprises the following steps: in the step 7, the resistivity of the slurry qualified by water washing is larger than 90 omega m, and then the slurry is dried for 8-12h by a drying oven at 105-140 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211161194.4A CN115537043A (en) | 2022-09-22 | 2022-09-22 | Method for preparing titanium dioxide for papermaking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211161194.4A CN115537043A (en) | 2022-09-22 | 2022-09-22 | Method for preparing titanium dioxide for papermaking |
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| CN115537043A true CN115537043A (en) | 2022-12-30 |
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| CN202211161194.4A Pending CN115537043A (en) | 2022-09-22 | 2022-09-22 | Method for preparing titanium dioxide for papermaking |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1454939A (en) * | 2003-05-29 | 2003-11-12 | 中国科学院山西煤炭化学研究所 | Method of preparing nano titanium dioxide granule with surface coated of aluminium oxide |
| CN103965659A (en) * | 2014-04-23 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing high water dispersibility titanium dioxide |
| CN108061718A (en) * | 2017-12-28 | 2018-05-22 | 安徽中创电子信息材料有限公司 | A kind of fast appraisement method of rutile type titanium white weatherability |
| CN109111764A (en) * | 2018-08-30 | 2019-01-01 | 浙江天泰新材料科技有限公司 | Nano-powder titanium dioxide coating new material and preparation method thereof |
| WO2022073390A1 (en) * | 2020-10-09 | 2022-04-14 | 安徽金星钛白（集团）有限公司 | Preparation method for high weather resistance anatase titanium dioxide powder |
-
2022
- 2022-09-22 CN CN202211161194.4A patent/CN115537043A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1454939A (en) * | 2003-05-29 | 2003-11-12 | 中国科学院山西煤炭化学研究所 | Method of preparing nano titanium dioxide granule with surface coated of aluminium oxide |
| CN103965659A (en) * | 2014-04-23 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing high water dispersibility titanium dioxide |
| CN108061718A (en) * | 2017-12-28 | 2018-05-22 | 安徽中创电子信息材料有限公司 | A kind of fast appraisement method of rutile type titanium white weatherability |
| CN109111764A (en) * | 2018-08-30 | 2019-01-01 | 浙江天泰新材料科技有限公司 | Nano-powder titanium dioxide coating new material and preparation method thereof |
| WO2022073390A1 (en) * | 2020-10-09 | 2022-04-14 | 安徽金星钛白（集团）有限公司 | Preparation method for high weather resistance anatase titanium dioxide powder |
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Address after: 543399 Tengxian Chemical Industry Zone, Wuzhou City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Jinmao Titanium Industry Co.,Ltd. Address before: 543399 Tengxian Chemical Industry Zone, Wuzhou City, Guangxi Zhuang Autonomous Region Applicant before: GUANGXI JINMAO TITANIUM Co.,Ltd. |
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