Preparation method of nanometer WOxZrO2 superacid
A super-acid and nanotechnology, applied in the direction of tungsten oxide/tungsten hydroxide, zirconia, etc., can solve the problems of large product particle size, complex process, low tungsten loading of products, etc., to increase interaction, reduce complexity and cost, effect of avoiding nano-agglomeration
Active Publication Date: 2010-08-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The technical problem to be solved by the present invention is the complex process, low tungsten content of the product and large particle size of the product existing in the existing synthesis technology. It provides a new nano-scale WO x / ZrO 2 The preparation method of superacid
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Abstract
The invention relates to a preparation method of nanometer WOxZrO2 superacid, mainly solving the problems that the existing preparation method has low tungsten carrying amount of WOxZrO2 superacid to cause low catalysis efficiency. The invention better solves the problem of low carrying capacity by adopting the technical scheme of hydrolyzing organic tungsten and zirconium solution by water vapor at certain temperature, and can be used for the industrial production of the nanometer WOxZrO2 superacid with high tungsten carrying amount.
Description
technical field The present invention relates to a kind of nano WO x / ZrO 2 Preparation method of superacid. Background technique In 1988, Hino et al first reported WO x / ZrO 2 Compared with liquid acid catalysts, it has the advantages of no pollution, no corrosion, and easy separation from products; moreover, it has good thermal stability and will not lose components under high temperature and redox atmosphere. WO x / ZrO 2 As an acidic catalyst, it exhibits high catalytic activity and good selectivity in reactions such as alkane isomerization, hydrocarbon alkylation, esterification, and dehydration. Existing WO x / ZrO 2 There are usually three methods for preparing superacids: impregnation method, co-precipitation method, and sol-gel method. (1) The synthesis process of the impregnation method is to first use zirconium salt to adjust the pH value by adding ammonia water dropwise, and then precipitate to prepare Zr(OH) 4 Precursor, impregnated with ammonium tungst...
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IPC IPC(8): C01G41/02C01G25/02
Inventor 唐康健杨为民高焕新贾银娟
Owner CHINA PETROLEUM & CHEM CORP