Production method of special titanium dioxide for decorative base paper

A technology of decorative base paper and production method, which is applied in the field of production of titanium dioxide for decorative base paper and special titanium dioxide for decorative base paper, can solve the problems of decorative base paper constraints, poor practicability, unstable quality, etc. Effects of morphology, resistance to aging and syneresis

Active Publication Date: 2017-11-24
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, a lot of technical research work has been done on the weather resistance of titanium dioxide for decorative base paper. Some use silicon-aluminum coating, some use aluminum phosphate mixture coating, and some use cerium salt to treat TiO 2 For coating, some use phosphorus-zirconium-aluminum coating. These technologies have defects such as complicated process, unstable quality, and poor practicability, which has brought constraints to the development of decorative base paper.

Method used

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  • Production method of special titanium dioxide for decorative base paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ⑴Weigh 2000gTiO 2 Add the first product to 3000g desalted water, stir to make a slurry of about 600g / L, then add 12g SiO 2 (0.2%) sodium silicate solution, adjust pH value 9.56 with 20% sulfuric acid, sand mill, make TiO 2 Dispersion reaches D99 2 The control of pH9.5-10 of silicate and slurry is to prevent silicon from agglomerating and strengthen silicon and TiO 2 combination.

[0029](2) Put the ground slurry into the coating tank, heat it in a water bath to raise the temperature to 51.2°C, and add desalted water to dilute to 300g / L.

[0030] (3) Quickly (5 minutes) add 160ml of 100g / L (0.8%) aluminum sulfate solution, and stir for 60 minutes, wherein the addition amount converted from 160ml of aluminum sulfate solution is calculated as Al 2 o 3 with TiO 2 The mass ratio is calculated as 0.8%, that is, after adding Al 2 o 3 The amount of TiO 2 0.8% of mass.

[0031] ⑷Add 400ml50g / L (1.0%) sodium phosphate solution, that is, after adding P 2 o 5 The amount ...

Embodiment 2

[0037] ⑴Weigh 2000gTiO 2 Add the first product to 3400g desalted water, stir to make a slurry of about 600g / L, then add 12g SiO 2 (0.2%) sodium silicate solution, adjust the pH value to 9.82 with 20% sulfuric acid, and sand mill to reach D99<1.0 μm.

[0038] (2) Put the ground slurry into the coating tank, heat it in a water bath to raise the temperature to 56.6°C, add desalted water to dilute to 310g / L.

[0039] (3) Quickly (5 minutes) add 200ml of 100g / L (1.0%) aluminum sulfate solution and stir for 60 minutes.

[0040] (4) Add 500ml of 50g / L (1.25%) sodium phosphate solution for 60 minutes. pH 5.02.

[0041] (5) Curing at 60°C for 60 minutes.

[0042] ⑹Under the condition of maintaining pH=5.0-5.5, add 500ml100g / L (2.5%) NaAlO 2 solution and sulfuric acid solution (20% H 2 SO 4 ), feed time 120 minutes.

[0043] (7) Adjust the pH value to 7.61 with sodium hydroxide solution, and ripen at 60°C for 120 minutes.

[0044] ⑻ Filtration, washing, drying, and airflow crus...

Embodiment 3

[0046] ⑴Weigh 2000gTiO 2 Add the first product to 3000g desalted water, stir to make a slurry of about 600g / L, then add 12g SiO 2 Sodium silicate solution, adjust the pH value to 9.95 with 20% sulfuric acid, and sand mill to reach D99<1.0μm.

[0047] (2) Put the ground slurry into the coating tank, heat it in a water bath to raise the temperature to 58.6°C, and add desalted water to dilute to 300g / L.

[0048] (3) Quickly (10 minutes) add 240ml of 100g / L (1.2%) aluminum sulfate solution, and stir for 60 minutes.

[0049] (4) Add 600ml of 50g / L (1.5%) sodium phosphate solution for 60 minutes. pH 5.03.

[0050] (5) Curing at 55°C for 60 minutes.

[0051] ⑹Under the condition of maintaining pH=5.0-5.5, add 500ml100g / L (2.5%) NaAlO 2 solution and sulfuric acid solution (20% H 2 SO 4 ), feed time 120 minutes.

[0052] (7) Adjust the pH value to 7.75 with sodium hydroxide solution, and ripen for 240 minutes at 55°C.

[0053] ⑻ Filtration, washing, drying, and airflow crushin...

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Abstract

The invention provides a production method of special titanium dioxide for decorative base paper, belonging to the technical field of titanium dioxide. The production method comprises the following steps of A, preparing titanium dioxide into 500-600g/L TiO2 sizing agent by using desalted water, adding silicate, grinding, regulating pH of the sizing agent to be 9.5-10, heating up to 40-80 DEG C, then diluting to obtain 300+/-10g/L TiO2 sizing agent, and keeping temperature at 40-80 DEG C; B, quickly adding an acid aluminum salt solution into the TiO2 sizing agent diluted in step A, and stirring to obtain mixed sizing agent; C, slowly adding a phosphorus-containing compound solution into the mixed sizing agent of step B, then regulating pH to be 5.0-5.5, and curing; D, after curing, slowly adding an alkali aluminum salt solution under the condition of pH being 5.0-5.5, adding a pH regulator while adding the alkali aluminum salt solution, keeping pH at 5.0-5.5, stirring for 20-40 min, and then regulating pH to be 7.0-8.0; E, curing again, filtering and washing, drying, and crushing to obtain the special titanium dioxide for decorative base paper. The production method is simple and highly practical, and can produce titanium dioxide of stable quality.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide, and relates to titanium dioxide for decorative base paper, in particular to a production method of titanium dioxide for decorative base paper. The production method of the invention is simple, the quality of the produced titanium dioxide is stable, and the practicability is strong. Background technique [0002] Titanium dioxide is mainly used in coatings, plastics, papermaking, ink, chemical fiber and other fields. The main component of titanium dioxide is TiO 2 Belonging to N-type semiconductor oxides, it has photochemical activity. After receiving light and heat, peripheral electrons are excited to generate photo-generated electrons and photo-generated holes. Under oxygen-deficient conditions, photo-generated electrons reduce TiO 2 Generate Ti 2 o 3 , to gray the melamine laminated paper. The photogenerated holes have strong oxidizing properties, which can easily degrade the organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06D21H21/28
CPCC09C1/3623C09C1/3661C09C1/3692C09C3/006C09C3/041C09C3/063D21H21/28
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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