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Preparation method of titanium dioxide slurry with high water dispersibility

A dispersive, titanium dioxide slurry technology, applied in chemical instruments and methods, dyed high molecular organic compound treatment, dyed low molecular organic compound treatment and other directions, can solve the problem of low water dispersibility of titanium dioxide slurry, and achieve particle size control. Excellent, saving manpower and material costs, and isolating the effect of migration

Pending Publication Date: 2021-12-14
攀钢集团重庆钒钛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low water dispersibility of existing titanium dioxide slurry

Method used

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  • Preparation method of titanium dioxide slurry with high water dispersibility
  • Preparation method of titanium dioxide slurry with high water dispersibility
  • Preparation method of titanium dioxide slurry with high water dispersibility

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preparation example Construction

[0032] The preparation method of high water dispersible titanium dioxide slurry comprises the following steps:

[0033] a. Sieve the sand-milled slurry to control the TiO content in the sieved slurry 2 The concentration is 400-550g / L;

[0034] b. Add the dispersant to the slurry treated in step a, and stir for 30-60min;

[0035] c. The temperature of the slurry treated in step b is raised to 70-100°C, then a silicate solution is added, and an aluminum salt solution is added in parallel to adjust the pH to 9-10, and then mature for 60-120min;

[0036] d. Cool the slurry treated in step c to 30-70°C, add dilute acid solution to adjust pH to 3-6, mature for 30-45min, then add phosphate solution, and add aluminum salt solution to adjust pH to 4- 7, aging for 90-120min;

[0037] e. Add the aluminum salt solution to the slurry treated in step d, adjust the pH to 5-8 with a pH regulator, and age for 90-180min to obtain high water dispersibility titanium dioxide slurry.

[0038] I...

Embodiment 1

[0046] Embodiment 1 concrete experimental procedure is as follows:

[0047] a. After sanding, the slurry passes through a 500-mesh sieve to obtain a ready-to-use slurry, the concentration of the titanium dioxide slurry is 450g / L, the temperature is raised to 55°C, and the initial pH is 10.1;

[0048] b. Add 0.3% potassium nitrate and 0.2% sodium polycarboxylate mixed solution (use TiO 2 total amount), stirring and dispersing for 30 minutes;

[0049] c. Heat up to 80°C, add 2.5% sodium silicate (as TiO 2 total amount), adding aluminum sulfate at the same time, maintaining the pH value between 9-10, and aging for 60 minutes;

[0050] d. Add water to cool down to 55°C, add dilute sulfuric acid, maintain the pH value between 4.5-5.5, ripen for 30 minutes, and add a mixture of 1.5% phosphoric acid and sodium dihydrogen phosphate (using TiO 2 total amount), while adding sodium metaaluminate in parallel to maintain the pH value between 5.0-6.0, and aging for 90 minutes.

[0051] ...

Embodiment 2

[0052] Embodiment 2 Concrete experimental steps are as follows:

[0053] a. After sanding, the slurry passes through a 500-mesh sieve to obtain a ready-to-use slurry, the concentration of the titanium dioxide slurry is 500g / L, the temperature is raised to 50°C, and the initial pH is 10.5;

[0054] b. Add 0.2% potassium nitrate and 0.25% sodium stearate mixed solution within 10min (use TiO 2 total amount), stirring and dispersing for 30 minutes;

[0055] c. Heat up to 85°C, add 3.0% sodium silicate (as TiO 2 total amount), adding aluminum sulfate at the same time, maintaining the pH value between 9-10, and aging for 90min;

[0056] d. Add water to cool down to 50°C, add dilute sulfuric acid, maintain the pH value between 5.0-5.5, ripen for 30 minutes, and add 2.0% sodium phosphate (based on TiO 2 total amount), while adding sodium metaaluminate in parallel to maintain the pH value between 5.0-5.5, and aging for 100 minutes.

[0057] e. keep the temperature constant, add 4.5...

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Abstract

The invention discloses a preparation method of titanium dioxide slurry with high water dispersibility, and belongs to the field of titanium dioxide production. The preparation method of the high-water-dispersibility titanium dioxide slurry comprises the following steps of: a, sieving sanded slurry; b, adding a dispersing agent, stirring and dispersing; c, heating, adding a silicate solution, and adding an aluminum salt solution in a parallel flow manner; d, cooling, and adding a dilute acid solution, a phosphate solution and an aluminum salt solution; and e, adding an aluminum salt solution to adjust the pH value to obtain titanium dioxide slurry with high water dispersibility. The water dispersibility and fluidity of the titanium dioxide slurry can be obviously improved. The preparation method is simple, and the production cost is low. The prepared titanium dioxide slurry can be directly used for a papermaking system in the form of titanium dioxide slurry. The problem that existing titanium dioxide slurry is low in water dispersibility can be effectively solved.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and relates to a preparation method of titanium dioxide slurry, in particular to a preparation method of highly water-dispersible titanium dioxide slurry. Background technique [0002] The field of decorative paper production has very high requirements on the performance of titanium dioxide, so it is necessary to carry out surface treatment on the surface of titanium dioxide, and densely coat one or more types of film layers on the surface of titanium dioxide to prevent direct ultraviolet light on the surface of titanium dioxide , effectively delay the photochemical activity of titanium dioxide, significantly increase its light resistance, and at the same time ensure its hiding power, whiteness and other properties, so as to achieve excellent application performance in decorative paper. [0003] In modern papermaking technology, the pulp suitable for paper quality is diluted with water ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/08C09C3/10D21H19/38D21H19/40
CPCC09C1/3661C09C1/3676C09C1/3653C09C1/3669C09C1/3692C09C3/006C09C3/063C09C3/06C09C3/10C09C3/08D21H19/385D21H19/40
Inventor 刘琦淦文军袁立军罗静徐庭敏
Owner 攀钢集团重庆钒钛科技有限公司
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