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Method for increasing solid content of titanium dioxide filter cake

A titanium dioxide and filter cake technology, applied in chemical instruments and methods, titanium dioxide, titanium compounds, etc., can solve the problems of increasing energy consumption, increasing the water content of titanium dioxide filter cake, and increasing the difficulty of drying, so as to reduce energy consumption, The effect of saving process and labor costs and easy operation

Inactive Publication Date: 2020-02-28
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although coating can improve the application performance of titanium dioxide, it also improves the water saturation of titanium dioxide, which greatly increases the water content of the titanium dioxide filter cake obtained after pressing, which in turn increases the difficulty of subsequent drying and increases energy consumption.

Method used

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  • Method for increasing solid content of titanium dioxide filter cake
  • Method for increasing solid content of titanium dioxide filter cake
  • Method for increasing solid content of titanium dioxide filter cake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take the pressed titanium dioxide crude product filter cake, test the Zeta potential after beating, the pH of its good dispersion is 6.5; adjust the pH of the slurry to 6.5 with dilute sulfuric acid, add 3% of the dry titanium dioxide weight in the slurry N,N'-bis(tetradecyldimethyl)-1,2-dibromide ethylenediammonium salt, dispersed for 30 minutes, squeezed, backflushed and dried the slurry, and calculated the solid content.

Embodiment 2

[0031] Get the pressed titanium dioxide crude product filter cake, test the Zeta potential after beating, and the good pH of the dispersibility is 7.0; the filter cake is beaten with a high-speed mixer, and the pH of the slurry is adjusted to 7.0 with dilute sulfuric acid, adding 5% ( N,N'-bis(hexadecyldimethyl)-1,2-dibromide ethylenediammonium salt, dispersed for 30 minutes, the slurry was pressed, blown back, dried, and the solid content was calculated.

Embodiment 3

[0033] Take the pressed titanium dioxide crude product filter cake, test the Zeta potential after beating, and the pH of the good dispersion is 7.5; the filter cake is beaten with a high-speed mixer, and the pH of the slurry is adjusted to 7.5 with dilute sulfuric acid, and 6% of N, N'-bis(octadecyldimethyl)-1,2-dibromide ethylene diammonium salt, dispersed for 30 minutes, the slurry was pressed, blown back, dried, and the solid content was calculated.

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Abstract

The invention relates to a preparation method of titanium dioxide. The method comprises the following steps: treating titanium ore by adopting a sulfuric acid method to obtain a crude titanium dioxideproduct; and subjecting the obtained crude titanium dioxide product to film coating, water washing, squeezing, drying and steam powdering to obtain the titanium dioxide, wherein a dimeric surfactantis added in the squeezing process.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide chemical industry, and in particular relates to a method for increasing the solid content of titanium dioxide filter cake. Background technique [0002] Titanium dioxide is an important white functional pigment. Because of its excellent hiding power, scattering power, and its excellent integration with plastics and coating systems after surface treatment, it has been widely used. Especially in the fields of coatings, paper, papermaking, inks, etc., titanium dioxide is known as the "king of white pigments". However, in the presence of moisture and exposure to ultraviolet light, the oxygen ions on the titanium dioxide lattice lose two electrons and become oxygen atoms. This new eco-oxygen has a strong activity, which can easily cause the organic matter in the coating film to be oxidized, causing chain scission and degradation of the organic matter, resulting in pulverization, loss of glos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/08C01G23/053
CPCC01G23/0532C01P2006/62C01P2006/63C01P2006/64C01P2006/90C09C1/3669C09C3/08
Inventor 陈建立曹青喜王永珊王欢欢王莉萍李瑞瑞冯亚阳赵丁张健
Owner LOMON BILLIONS GRP CO LTD