Method for preparing catalyst carrier Al2O3 powder by activating and hydrolyzing metallic aluminium under ultrasound-electric field coupling

A catalyst carrier, electric field coupling technology, applied in catalyst carrier, catalyst activation/preparation, alumina/hydroxide preparation, etc., to achieve the effects of great economic development prospects, high activity, and high product purity

Inactive Publication Date: 2010-09-15
昆明珀玺金属材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Chinese patent CN1079718 reports that metal aluminum is activated by mercuric chloride

Method used

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  • Method for preparing catalyst carrier Al2O3 powder by activating and hydrolyzing metallic aluminium under ultrasound-electric field coupling
  • Method for preparing catalyst carrier Al2O3 powder by activating and hydrolyzing metallic aluminium under ultrasound-electric field coupling

Examples

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Example Embodiment

[0046] Example 1: Using high-purity aluminum sheet with purity of 99.999%, size: 5×3×0.1, as raw material, electrolytic degreasing, and soaking in 5% NaOH aqueous solution for 10 minutes, taking out pure water and rinsing three times. The pH value is measured to be neutral. The aluminum sheet is placed in a 1000ml beaker to form a galvanic cell with the metal platinum sheet. The size of the metal platinum sheet is: 6×6×0.08, and the pure water is 750ml (resistivity: 10MΩ.cm). The water temperature is 90℃, the stirring rate is 80 rpm, and the ultrasonic generator with the ultrasonic frequency of 20KHZ and the power of 100W is started at the same time. The probe is placed in the beaker. During the stirring and ultrasonic process, the metal aluminum sheet reacts with the water, and there is hydrogen at the same time. Discharge, no bubbles are generated after reaction for about 6 hours, the reaction basically stops, stop stirring and ultrasonic, cut off the connection of the primary...

Example Embodiment

[0047] Example 2: Take 15kg of high-purity aluminum ingots with a purity of 99.99% and roll a sheet with a thickness of 0.5mm, and cut it into aluminum foil. The electrode size is 6×4×0.5, electrolytic oil, and then subjected to 5% NaOH aqueous solution Soak for 10 minutes, take out pure water and rinse three times. The cleaning is also neutral as measured by the pH value. Place it directly in a 5000ml beaker, with 3000ml pure water (resistivity: 10MΩ.cm), and platinum-plated titanium anode The mesh constitutes the primary battery. The size of the platinized titanium anode mesh is 6×6×0.08, (the effective area ratio of the aluminum foil electrode and the platinized titanium anode mesh is 1:4), the water temperature is 90℃, the stirring rate is 80 revolutions / min, and it starts at the same time An ultrasonic generator with an ultrasonic frequency of 40KHZ and a power of 30W. The probe is placed in a beaker. During the stirring and ultrasonic process, the metal aluminum powder and...

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Abstract

The invention discloses a new process for preparing high purity aluminum oxide powder. The processed is carried out based on the fundamental principle of ultrasound electrochemistry, wherein electrode reactions in primary cells between metallic aluminium and air is formed under ultrasound action in a pure water system, and in-situ activation is carried out on the surface of the high purity metallic aluminium by the cavitation of an ultrasonic field, which can promote the activation of the surface of the metallic aluminium and the primary cell reaction between the metallic aluminium and the air as well as the hydrolysis reaction of the metallic aluminium. The method has simple principle, concise process, short technological procedures, low specific volume and energy consumption, environmental protection and no pollution. As under the entire ultrasound-electric field coupling condition, the reaction is moderate and controllable, and the obtained high purity Al (OH) 3 gel has small primary particle size, uniform particle size distribution, high activity, good flowability, particle appearance approximate to sphere and easy purity control. The obtained Al (OH) 3 gel is processed then by thermal treatment, and the high purity aluminum oxide powder with different forms can be obtained at different thermal treatment temperatures. The product has high purity, excellent particle characteristics and incomparable advantages over the products prepared by other production methods in the aspects of purity and particle shape.

Description

technical field [0001] The invention relates to a preparation method of high-purity alumina powder, in particular to the preparation of catalyst carrier Al by using ultrasonic-electric field coupling activation technology to promote the hydrolysis reaction of metal aluminum 2 o 3 powder. Background technique [0002] Alumina carrier is the most widely used catalyst carrier, accounting for about 70% of industrial supported catalysts. It is widely used in the field of petrochemical industry, involving reforming, hydrogenation, dehydrogenation, dehydration, dehalogenation, disproportionation, Isomerization and other reactions. The porous alumina used as a catalyst and its carrier has a large specific surface area, and its microporous surface has the properties required for catalysis. Because of its large surface area and many surface active centers, the γ-phase nano-alumina provides the necessary conditions for the catalyst, enhances the reaction speed, and improves the sele...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/02C01F7/42C01B3/08B01J37/34
CPCY02E60/36
Inventor 胡劲王玉天文劲松
Owner 昆明珀玺金属材料有限公司
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