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Solid super acidic catalyst and its preparing method

A solid superacid and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced activity of solid superacids, decreased catalyst activity, and reduced specific surface area, etc., to achieve increased Content, increase the calcination temperature, improve the effect of catalytic efficiency

Active Publication Date: 2008-08-20
江西省德兴市百勤异VC钠有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high catalyst calcination temperature will cause catalyst crystallization and reduce SO 4 2- The specific surface area bound to the catalyst
High calcination temperature can also cause SO 4 2- The decomposition of the catalyst reduces the activity of the
In addition, solid superacids are easy to absorb water, and the activity of solid superacids will also decrease after absorbing water.

Method used

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  • Solid super acidic catalyst and its preparing method
  • Solid super acidic catalyst and its preparing method
  • Solid super acidic catalyst and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Add water to dissolve the zirconium oxychloride, adjust the pH value of the solution to a range of 9 with ammonia water, and generate zirconium hydroxide precipitates. The precipitate was filtered and washed until the filtrate had a pH of 7 and no Cl - , and then the precipitate was dried. Combine the precipitate with AlF 3 The powder mixture is ground to 3 The content of powder is 1wt%), impregnated with 0.5mol / L sulfuric acid solution, filtered and dried. After drying, the mixture was calcined at 600°C for 5 hours. The properties and product yields of the resulting catalysts are shown in Table 2. Table 2

[0020]

Embodiment 2

[0022] Catalyst is prepared by the method of embodiment 1, difference is that in the mixture AlF 3 The content is 3wt%, and the properties and product yield of the obtained catalyst are shown in Table 3. table 3

[0023]

Embodiment 3

[0025] Catalyst is prepared by the method of embodiment 1, difference is that in the mixture AlF 3 The content is 5wt%, and the properties and product yield of the obtained catalyst are shown in Table 4. Table 4

[0026]

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Abstract

The present invention discloses a solid super acidic catalyst and its preparation method. It is characterized by that the concentration of sulfuric acid radical ion in the solid super acid is 10-15 wt%, halide content of aluminium is 1-5 wt%, water content in the catalyst is less than 1 wt% and the rest is ZrO2 carrier, the mean pore size of said catalyst is 5-15nm. Its preparation method includes the following steps: adding water to dissolve zirconium oxychloride, using ammonia water to regulate pH value of solution to 9-10 and forming zirconium hydroxide precipitate; filtering and cleaning said precipitate until the pH value of filtrate is 6.9-7.1, having no Cl-, drying; mixing the precipitate with halide powder of aluminium, grinding to make grain size be less than 100 meshes, then using sulfuric acid solution whose concentration is 0.1-1.0 mol / L to soak the above-mentioned material, filtering, drying, roasting for 2-5 hr at 600-700deg.C so as to obtain the invented product solid super acidic catalyst.

Description

technical field [0001] The present invention relates to a kind of solid superacid catalyst and preparation method thereof, more specifically relate to a kind of modified ZrO containing sulfate ion 2 Supported solid superacid catalyst and its preparation method. Background technique [0002] A solid superacid is a solid acid with a stronger acidity than 100% sulfuric acid, expressed by the Hammett acidity function, the H of 100% sulfuric acid 0 =-11.93, while the H of the solid superacid 0 <-11.93. Compared with traditional catalysts, solid superacids have the following characteristics: (1) high catalytic efficiency, less dosage, less side reactions, and less by-products; (2) can be used at high temperatures, reusable, and the separation of catalysts and products is simple ; (3) non-corrosive, not polluting the environment; (4) the preparation method is simple and can be prepared by general metal salts. Due to the above advantages, the research and application of solid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/125B01J27/053B01J21/06
Inventor 房永征金鸣林杨俊和张琢
Owner 江西省德兴市百勤异VC钠有限公司
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