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Rutile metatitanic acid and titanium dioxide, and preparation methods thereof

A technology of rutile type and metatitanic acid, which is applied in the preparation of titanium compounds, the preparation of chlorides, chemical instruments and methods, etc., to achieve the effects of avoiding product sintering, low hydrolysis temperature, and simple maintenance

Pending Publication Date: 2020-07-28
福建富仕新材料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a rutile metatitanic acid, titanium dioxide and a preparation method thereof, aiming at improving at least one problem existing in the preparation of titanium dioxide

Method used

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  • Rutile metatitanic acid and titanium dioxide, and preparation methods thereof
  • Rutile metatitanic acid and titanium dioxide, and preparation methods thereof
  • Rutile metatitanic acid and titanium dioxide, and preparation methods thereof

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preparation example Construction

[0058] A kind of preparation method of rutile type metatitanic acid provided by the embodiment of the present invention comprises:

[0059] The mixed solution of the seed crystal solution and the ferrotitanium solution is hydrolyzed and kept at 90-100° C. to obtain a mixed solution containing metatitanic acid, ferrous chloride and hydrochloric acid; the seed crystal solution is obtained from the ferrotitanium solution Part of it is obtained by aging at 90-100°C, the iron ions in the ferrotitanium solution are all ferrous ions, and the Ti in the ferrotitanium solution 4+ The content of TiO 2 Calculated as 100-200g / L, the iron-titanium ratio in the ferrotitanium solution is 0.1-0.3.

[0060] Iron-to-titanium ratio in the application refers to the mass of ferrous ions and titanium (in the form of TiO 2 count) mass ratio.

[0061] The above method belongs to the liquid phase hydrolysis method, which has lower energy consumption compared with the hydrochloric acid method. Under ...

Embodiment 1

[0109] (1) Add 32% hydrochloric acid and ilmenite into the reaction kettle according to the acid / mineral mass ratio of 5:1, feed hydrogen chloride gas to make the pressure in the system 1MPa higher than the atmospheric pressure, react at 80°C for 5 hours, and the reaction ends Afterwards, the insoluble matter was removed by filtration to obtain solution A0;

[0110] (2) Add iron powder to A0, react at 60°C for 1 hour to obtain solution A1, control Ti 3+ The concentration of TiO 2 Calculated as 1g / L;

[0111] (3) Pass hydrogen chloride gas into the solution A1, so that the concentration of hydrochloric acid in the solution is raised to 12mol / L, adopt vacuum crystallization to control the iron-titanium ratio in the solution to be 0.2, and separate to obtain solution A2;

[0112] (4) Add solution A2 to the iron-titanium co-extractor according to O / W=1:1, use 60% trioctylphosphine oxide diluted with kerosene (that is, the ratio of trioctylphosphine oxide to kerosene mass is 1.5:...

Embodiment 2

[0119] (1) Add 45% hydrochloric acid and ilmenite into the reaction kettle according to the acid / mineral mass ratio of 2:1, feed hydrogen chloride gas to make the pressure in the system 0.1MPa higher than the atmospheric pressure, and react at 70°C for 10 hours. After the end, remove the insoluble matter by filtration to obtain solution A0;

[0120] (2) Add iron sheets to A0, react at 70°C for 30 minutes to obtain solution A1, and control Ti 3+ The concentration of TiO 2 Calculated as 2g / L;

[0121] (3) Pass hydrogen chloride gas into solution A1, so that the concentration of hydrochloric acid in the solution is raised to 14mol / L, adopt vacuum crystallization to control the iron-titanium ratio in the solution to be 0.3, and separate to obtain solution A2;

[0122] (4) According to O / W=2:1, the solution A2 is added to the iron-titanium co-extractor, and 50% trioctylphosphine oxide diluted with kerosene is used for extraction to obtain the iron-titanium extract solution A3 and...

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Abstract

The invention provides rutile metatitanic acid and titanium dioxide, and preparation methods thereof, belonging to the technical field of pigment preparation. The preparation method of rutile metatitanic acid comprises the following steps: hydrolyzing a mixed solution of a seed crystal solution and a ferrotitanium solution at 90-100 DEG C, and keeping the temperature to obtain a mixed solution containing metatitanic acid, ferrous chloride and hydrochloric acid, wherein the seed crystal solution is obtained by curing a part of the ferrotitanium solution at 90-100 DEG C, iron ions in the ferrotitanium solution are divalent iron ions, the content of Ti<4+> in the ferrotitanium solution is 100-200 g / L in terms of TiO2, and a iron-titanium ratio is 0.1-0.3. The rutile metatitanic acid is prepared by adopting the method. The preparation method of the titanium dioxide comprises the preparation method of the rutile type metatitanic acid, and comprises a step of calcining the metatitanic acid.The titanium dioxide is prepared by using the method. The rutile metatitanic acid is prepared by the method, and the method is simple in process and low in reaction energy consumption and can preparehigh-quality titanium dioxide .

Description

technical field [0001] The invention relates to the technical field of pigment preparation, in particular to rutile metatitanic acid, titanium dioxide and a preparation method thereof. Background technique [0002] Titanium dioxide (TiO 2 ) is an important inorganic chemical product, which has important uses in industries such as coatings, inks, papermaking, plastics, rubber, chemical fibers, and ceramics. [0003] The common industrial production methods of titanium dioxide are sulfuric acid method and chlorination method. The sulfuric acid method is to use sulfuric acid to hydrolyze titanium-containing minerals to obtain a titanyl sulfate solution, which is purified and hydrolyzed to obtain hydrated titanium dioxide precipitates, and then fired in a brick kiln to produce titanium dioxide pigment products. steps, and there is a lot of waste, especially the hydrolysis filtrate contains a lot of iron sulfate and waste sulfuric acid, which needs to be neutralized with slaked...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C01G23/08C01G49/06C01B7/03
CPCC01G23/001C01G23/08C01G49/06C01B7/035C01P2002/72C01P2004/03C01P2006/60C01P2006/80
Inventor 鲍领翔武超陈刘费明谢秉昆
Owner 福建富仕新材料有限责任公司
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