Method for preparing gas-phase nano titanium dioxide by high-temperature plasma combustion method

A nano-titanium dioxide and plasma technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of undisclosed details, improve the morphology and dispersibility, reduce the reaction temperature and production energy consumption , the effect of high product purity

Pending Publication Date: 2022-07-15
安徽中航纳米技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, whether the above-mentioned device for preparing titanium dioxide and the method for preparing titanium dioxide can produce titanium dioxide powder with a nanometer size is not disclosed in this document.

Method used

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  • Method for preparing gas-phase nano titanium dioxide by high-temperature plasma combustion method
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  • Method for preparing gas-phase nano titanium dioxide by high-temperature plasma combustion method

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Embodiment 1

[0026] A method for preparing gas-phase nano-titania by a high-temperature plasma combustion method, the steps are as follows:

[0027] 1) The raw material nano-metatitanate powder is subjected to jet pulverization and depolymerization by jet mill. Air is used as the carrier gas in the jet mill. The powder after jet pulverization and depolymerization directly enters the reaction chamber of the high temperature plasma reactor with the air. The carrier gas flow of air was 800 seem.

[0028] 2) Using air as the carrier gas, the nano-metatitanate powder is transported to the reaction chamber of the high-temperature plasma reactor. The plasma excitation gas of the high-temperature plasma reactor is nitrogen, and the nano-metatitanate powder is in the high-temperature plasma. The reaction chamber of the reactor reacts rapidly and falls to the powder collection system of the high temperature plasma reactor. The plasma flame temperature of the high temperature plasma reactor is 1800 ...

Embodiment 2

[0034] A method for preparing gas-phase nano-titania by a high-temperature plasma combustion method, the steps are as follows:

[0035] 1) The raw material nano-metatitanate powder is subjected to jet pulverization and depolymerization by jet mill. Air is used as the carrier gas in the jet mill. The powder after jet pulverization and depolymerization directly enters the reaction chamber of the high temperature plasma reactor with the air. The carrier gas flow of air was 700 seem.

[0036] 2) Using air as the carrier gas, the nano-metatitanate powder is transported to the reaction chamber of the high-temperature plasma reactor. The plasma excitation gas of the high-temperature plasma reactor is nitrogen, and the nano-metatitanate powder is in the high-temperature plasma. The reaction chamber of the reactor reacts rapidly and falls to the powder collection system of the high temperature plasma reactor. The plasma flame temperature of the high temperature plasma reactor is 2000 ...

Embodiment 3

[0039] A method for preparing gas-phase nano-titania by a high-temperature plasma combustion method, the steps are as follows:

[0040] 1) The raw material nano-metatitanate powder is subjected to jet pulverization and depolymerization by jet mill. Air is used as the carrier gas in the jet mill. The powder after jet pulverization and depolymerization directly enters the reaction chamber of the high temperature plasma reactor with the air. The carrier gas flow of air was 650 seem.

[0041]2) Using air as the carrier gas, the nano-metatitanic acid powder is transported to the reaction chamber of the high-temperature plasma reactor. The plasma excitation gas of the high-temperature plasma reactor is argon, and the nano-metatitanic acid powder is in the high temperature plasma. It reacts rapidly in the reaction chamber of the plasma reactor and falls to the powder collection system of the high temperature plasma reactor. The plasma flame temperature of the high temperature plasma...

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Abstract

The invention discloses a method for preparing gas-phase nano titanium dioxide by a high-temperature plasma combustion method, and relates to the technical field of nano material preparation. A raw material nano metatitanic acid powder is subjected to airflow crushing and depolymerization by utilizing an airflow mill, carrier gas in the airflow mill adopts air, and the powder subjected to airflow crushing and depolymerization directly enters a reaction cavity of a high-temperature plasma reactor along with the air; the nano metatitanic acid powder rapidly reacts in a reaction cavity of the high-temperature plasma reactor and falls into a powder collecting system of the high-temperature plasma reactor; and cooling, settling and collecting to obtain the gas-phase nano titanium dioxide powder. The raw material nano metatitanic acid powder is subjected to airflow crushing and depolymerization through the airflow mill, the airflow mill process is added, the depolymerization effect is mainly achieved, the powder easy to disperse is formed, and the preparation of the dispersed form of the gas-phase titanium dioxide nano powder is facilitated. Meanwhile, the jet mill is additionally arranged at the front section of the plasma reaction process, and the used carrier gas can be directly utilized and introduced into the reaction, so that the carrier gas is saved.

Description

technical field [0001] The invention relates to the technical field of nano-powder material preparation, in particular to a method for preparing gas-phase nano-titanium dioxide by a high-temperature plasma combustion method. Background technique [0002] Titanium dioxide is an inorganic white solid or powdered amphoteric oxide, which is widely used in coatings, plastics, papermaking, printing inks, chemical fibers, rubber, cosmetics and other industries. Titanium dioxide has a good UV shielding effect, and is often incorporated into textile fibers as a sunscreen agent. Ultrafine titanium dioxide powder is also added to sunscreen creams to make sunscreen cosmetics. Titanium dioxide has stable properties and is widely used as a white pigment in paints. It has good hiding power, similar to lead white, but does not turn black like lead white; it has the same persistence as zinc white. [0003] At present, there are two main industrial production methods of titanium dioxide: sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08B82Y40/00
CPCC01G23/08B82Y40/00C01P2004/32C01P2004/64C01P2004/03C01P2002/72
Inventor 王开新赵世维周正周志中
Owner 安徽中航纳米技术发展有限公司
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