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Preparation method of titanium dioxide special for papermaking

A titanium dioxide and solution technology, applied in papermaking, textiles and papermaking, chemical instruments and methods, etc., can solve the problems of high cost and poor light resistance, and achieve improved light resistance, dense film layer, high light resistance and hiding power. Effect

Active Publication Date: 2020-07-31
HENAN BILLIONS NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Publication number CN108929574A discloses a preparation method of titanium dioxide specially used for papermaking. The titanium dioxide coating layer formed on the surface of titanium dioxide has a three-layer structure, the innermost layer is cerium compound, the middle layer is zirconia, and the outer layer is aluminum oxide. , although the titanium dioxide pigment that this method obtains has higher sunfastness and hiding power, but coating process has used zirconium compound, and cost is higher; Publication number is CN102585559A a kind of preparation method of titanium dioxide for decorative paper, the method's The cladding layer is composed of silicon oxide, aluminum phosphate, aluminum oxide and an organic treatment layer. Although the obtained titanium dioxide has high hiding power, its light resistance is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of special titanium dioxide for papermaking, comprising the following steps,

[0033] Step 1, import the qualified slurry of sand mill particle size into the coating tank; use TiO 2 meter, control the slurry concentration to 300g / L; simultaneously raise the temperature to 80°C;

[0034] Step 2, add FeSO within 60min 4 solution and dilute NaOH solution, maintain the pH of the slurry at 2, homogenize for 30min; 2 o 3 Gauge, FeSO 4 The amount of solution added accounted for the TiO 2 0.5wt% of the total amount;

[0035] Step 3, add citric acid solution within 20 minutes, homogenize for 30 minutes; add NaOH solution to adjust the slurry pH = 5.0, after 20 minutes, homogenize for 10 minutes; the amount of citric acid solution added, based on citric acid, accounts for 2 0.60wt% of the total amount;

[0036] Step 4, add H in parallel flow within 60min 3 PO 4 solution with NaAlO 2 solution, and maintain pH = 5.0, homogenized for 30min; 2 o 5 Met...

Embodiment 2

[0042] A preparation method of special titanium dioxide for papermaking, comprising the following steps,

[0043] Step 1, import the qualified slurry of sand mill particle size into the coating tank, and use TiO 2 Control the slurry concentration to 300g / L, and raise the temperature to 80°C at the same time;

[0044] Step 2, add FeSO within 60min 4 solution and dilute NaOH solution, maintain the pH of the slurry at 2, homogenize for 30min; 2 o 3 Gauge, FeSO 4 The amount of solution added accounted for the TiO 2 0.5wt% of the total amount;

[0045] Step 3, add malic acid solution within 20 minutes, and homogenize for 30 minutes; NaOH adjusts the slurry pH=5.0, after 20 minutes, homogenize for 10 minutes;2 0.60wt% of the total amount;

[0046] Step 4, add H in parallel flow within 60min 3 PO 4 solution with NaAlO 2 solution, and maintain pH = 5.0, homogenized for 30min; 2 o 5 Meter, H 3 PO 4 The amount of solution added accounted for the TiO 2 2.5wt% of the total a...

Embodiment 3

[0052] A preparation method of special titanium dioxide for papermaking, comprising the following steps,

[0053] Step 1, import the qualified slurry of sand mill particle size into the coating tank, and use TiO 2 Control the slurry concentration to 300g / L, and raise the temperature to 80°C at the same time;

[0054] Step 2, add FeSO within 60min 4 Solution and dilute NaOH solution, maintain the pH of the slurry at 2, homogenize for 30min; FeSO 4 The amount of solution added, as Fe 2 o 3 Accounted for TiO 2 0.5wt% of the total amount;

[0055] Step 3, add citric acid solution within 20 minutes, homogenize for 30 minutes; adjust slurry pH=5.0 with NaOH, after 20 minutes, homogenize for 10 minutes; 2 0.60wt% of the total amount;

[0056] Step 4, add H in parallel flow within 60min 3 PO 4 solution with NaAlO 2 solution, and maintain pH = 5.0, homogenized for 30min; 2 o 5 Meter, H 3 PO 4 The amount of solution added accounted for the TiO 2 2.5wt% of the total amount...

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PUM

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Abstract

The invention discloses a preparation method of titanium dioxide special for papermaking. A finished product is obtained through slurry preparation, coating, three times of washing, flash evaporationand powder steaming. Particularly, hydroxyl-containing polybasic acid is selected as a coating agent. According to the invention, the hydroxyl-containing polybasic acid is used as a special coating agent, so that a film layer is more compact, and higher light resistance and covering power are achieved; the hydroxyl-containing polybasic acid is attached to the surface of the titanium dioxide in a bonding manner, cannot be remained in a filtrate, cannot influence VOCs, and further cannot influence the environment.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide preparation, in particular to a preparation method of special titanium dioxide for papermaking. Background technique [0002] Titanium dioxide (TiO 2 ), commonly known as titanium dioxide, is the irreplaceable and best-performing white pigment so far. Due to its excellent properties such as chemical resistance and stability, it is used as an important inorganic functional material and is widely used in coatings, printing inks, plastics, paper, rubber, chemical fibers, cosmetics and other industries. At present, nearly 60% of the consumption of titanium dioxide in the world is used for coatings, 16% for plastics, 14% for papermaking, 3% for printing inks, and 7% for others (including rubber, cosmetics, medicine, enamel and chemical fibers, etc.) . [0003] Publication number CN108929574A discloses a preparation method of titanium dioxide specially used for papermaking. The titanium diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08C09C3/04D21H17/69
CPCC01P2006/90C09C1/3607C09C1/3615C09C1/3653C09C1/3661C09C1/3669C09C1/3692C09C3/003C09C3/006C09C3/04C09C3/06C09C3/063C09C3/08D21H17/675D21H17/69
Inventor 赵波王丽萍王永珊周文静冯亚阳曹青喜
Owner HENAN BILLIONS NEW MATERIAL CO LTD
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