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A method of controlling the particle size of titanium dioxide for decorative base paper

A technology for decorating base paper and titanium dioxide, applied in chemical instruments and methods, papermaking, titanium compounds, etc., can solve the problems of insufficient attention to titanium dioxide particle size control, serious industry homogeneity, and poor application effect, and achieve good achromatic power. , good consistency, uniform size effect

Active Publication Date: 2019-02-15
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China's titanium dioxide industry rose in the early 1990s and has developed rapidly in this century, but there are few technical researches. It mainly uses the technology of Eastern European countries before the 1970s. Some enterprises have learned some sporadic advances in the world's sulfuric acid process through exchanges. According to experience, the homogeneity of the industry is very serious, and the control of titanium dioxide particle size is not enough, resulting in the later application effect not as good as that of chloride titanium dioxide.

Method used

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  • A method of controlling the particle size of titanium dioxide for decorative base paper

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Experimental program
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Effect test

Embodiment 1

[0025] Titanium sulfate solution preheating: Take 1000ml of titanium sulfate liquid in a 2000ml beaker, heat in a resistance furnace, control the heating rate at 1°C / min, and heat to 98°C. Titanium sulfate solution quality index: total titanium concentration TiO 2 225.21g / L; Ti 3+ Concentration 1.89g / L; acid ratio 1.81; Fe 2+ / TiO 2 0.29; stability 530ml, stability is also known as stability, in the production of titanium dioxide, titanium liquid has a tendency to undergo early hydrolysis and precipitate white metatitanic acid (or orthotitanic acid) colloidal particles under the condition of changing conditions. The strength of this tendency is called the stability of the titanium solution, and the characteristic that indicates the strength of this tendency is called the stability. The stability of the titanium solution is calculated by distilling each ml of titanium solution with distilled water at 25°C until it becomes white and turbid. It is indicated by the number of m...

Embodiment 2

[0035] Preheating of titanium sulfate solution: Take 1000ml of titanium sulfate liquid in a 2000ml beaker, heat in a resistance furnace, control the heating rate at 1°C / min, and heat to 96°C. Titanium sulfate solution quality index: total titanium concentration TiO 2 231.45g / L; Ti 3+ Concentration 2.45g / L; acid ratio 1.76; Fe 2+ / TiO 2 0.27; stability 500ml; solid phase 10.4mg / L.

[0036] Desalinated water is preheated to boiling 99°C.

[0037] Adding bottom water: Add 250ml of boiled desalted water into a 2000ml beaker with stirring, and stir.

[0038] Add titanium sulfate solution: Add the preheated titanium sulfate solution into the beaker in the step, and add it for 17 minutes.

[0039] Heating and boiling: After adding the titanium sulfate solution, stir for 5 minutes, raise the temperature to a slight boiling, the temperature is 114°C, the heating time is 17 minutes, the temperature is controlled at 114-118°C, hydrolyzed for 41 minutes, the slurry turns into a helm...

Embodiment 3

[0045] Titanium sulfate solution preheating: Take 1000ml of titanium sulfate liquid in a 2000ml beaker, heat in a resistance furnace, control the heating rate at 1°C / min, and heat to 98°C. Titanium sulfate liquid quality index: Total titanium concentration TiO 2 233.18g / L; Ti 3+ Concentration 2.57g / L; Acid ratio 1.72; Fe 2+ / TiO 2 0.27; Stability 515ml; The solid phase is 21.3mg / L.

[0046] Desalinated water is preheated to boiling 101°C.

[0047] Adding bottom water: Add 250ml of boiled desalted water into a 2000ml beaker with stirring, and stir.

[0048] Add titanium sulfate solution: add the preheated titanium sulfate solution to the step In the beaker, the addition time was 18 minutes.

[0049] Heating and boiling: After adding the titanium sulfate solution, stir for 5 minutes, raise the temperature to slight boiling, the temperature is 118°C, the heating time is 18 minutes, the temperature is controlled at 112-118°C, hydrolyzed for 43 minutes...

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Abstract

The invention discloses a method for controlling the particle diameter of decorative body paper titanium dioxide, and belongs to the technical field of decorative body paper titanium dioxide. Through the control of a hydrolysis working procedure, the method comprises the following steps: A: selecting titanium sulfate solution, preheating to 96-98 DEG C for standby use, and preheating desalted water to be boiling for standby use; B: firstly, adding the desalted water which is preheated to be boiling into a hydrolysis reactor to be stirred, then, adding the preheated titanium sulfate solution, stirring after the titanium sulfate solution finishes adding, and heating to raise temperature to slight boiling; C: after a hydrolysis rate of step B achieves 50-65%, stopping stirring and heating, and carrying out curing; D: after curing is carried out, stirring again, heating and raising temperature to slight boiling, and carrying out hydrolysis for 160-180min; E: adding the boiling desalted water, controlling total titanium concentration TiO2 in slurry to be 160-180g / L, keeping the slight boiling, and carrying out hydrolysis for 50-60min. According to the method disclosed by the invention, a titanium sulfate solution pyrohydrolysis technology is implemented by meeting body paper requirements, water and titanium dioxide particle diameter are even, and the method conforms to the hydrolysis technology specially designed for the particle diameter requirement of the decorative body paper titanium dioxide.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide for decorative base paper, and relates to the research on the particle size of titanium dioxide for decorative base paper, in particular to a method for controlling the particle size of titanium dioxide for decorative base paper. The method of the invention enables the titanium sulfate liquid thermal hydrolysis technology to meet the requirements of the decorative base paper, and the particle size of water and titanium dioxide is uniform, and the hydrolysis technology is specially designed for the particle size of the decorative base paper titanium dioxide. By starting with the hydrolysis technology, the particle size of titanium dioxide prepared by the sulfuric acid method can reach the advantage of the chloride method, and then the decorative base paper prepared can be compared with the chloride method titanium dioxide in terms of hiding power, whiteness and gloss. Background technique ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00D21H17/67
CPCC01G23/00C01P2004/61C01P2004/62D21H17/675
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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