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Catalyst support added with hydrogen, peroxide catalyst produced by anthraquinone method and the producing process

A hydrogenation catalyst, hydrogen peroxide technology, applied in catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problem that the catalyst activity is not greatly improved, and achieve high catalyst activity and good stability. , good diffusion, the effect of reducing precious metal content

Active Publication Date: 2008-12-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And, compared with spherical catalysts, the activity of the invented catalyst disclosed in this patent has not been greatly improved

Method used

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  • Catalyst support added with hydrogen, peroxide catalyst produced by anthraquinone method and the producing process
  • Catalyst support added with hydrogen, peroxide catalyst produced by anthraquinone method and the producing process
  • Catalyst support added with hydrogen, peroxide catalyst produced by anthraquinone method and the producing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dry rubber powder (produced by Sinopec Catalyst Changling Branch Company, BET specific surface area is 335m 2 / g, the pore volume is 1.13cm 3 / g) 50kg, 1kg of safflower powder, 60L of nitric acid solution with a concentration of 2% and kneaded evenly, extrude a butterfly strip with a maximum diameter D of 1.4mm through the extruder, the cross-sectional shape of the butterfly strip is shown in figure 1 , the specific size parameters used are f=1.1mm, t=0.6mm, l=0.55mm, d=0.75mm. After drying in an oven at 120°C for 4 hours and calcining at 950°C for 4 hours, the obtained carrier is δ-Al 2 o 3 Mainly crystal form, BET specific surface area is 138m 2 / g, the pore volume is 0.66cm 3 / g, bulk ratio is 0.54g / mL, most probable pore size is 14.3nm, 89% pore size distribution>10nm, less than 1% pore size distribution<6nm.

[0040] Measure the above-mentioned carrier of 10mL, and the impregnating solution is obtained by dissolving palladium with hydrochloric acid to obtain a...

Embodiment 2

[0043] Control the pH of the chloropalladium acid solution to 1, impregnate the carrier at room temperature for 20 h, and prepare the carrier and catalyst according to the method in Example 1. The prepared catalyst tends to be homogeneous. The hydrogenation efficiency of the catalyst is 4.31gH 2 o 2 / L.

Embodiment 3

[0045] The pH of the chloropalladium acid solution was controlled to be 5, and the carrier and catalyst were prepared according to the method in Example 1. Precipitation occurs during the impregnation of the chloropalladic acid solution. The hydrogenation efficiency of the catalyst is 4.83gH 2 o 2 / L.

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PUM

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Abstract

The present invention discloses one kind of oxide containing porous alumina, and oxide of Si, Ti and / or Zr, and the oxide is used as the carrier for hydrogenation catalyst used in an anthraquinone process to produce hydrogen peroxide. The catalyst has Pd supported in the amount of 0.05-10 wt%. The hydrogenation catalyst carrier has stable performance, property specific surface area, pore size and pore volume, and the hydrogenation catalyst has high catalytic activity, high stability and relatively lower noble metal content.

Description

technical field [0001] The invention relates to a hydrogenation catalyst carrier, a palladium hydrogen peroxide catalyst produced by an anthraquinone method prepared by using the carrier, and a preparation method of the carrier and the catalyst. Background technique [0002] The anthraquinone method is the main process for the production of hydrogen peroxide, which is widely used by domestic and foreign production enterprises. The technical principle of the production of hydrogen peroxide by anthraquinone method is as follows: use anthraquinone compounds as the working carrier, dissolve them in an appropriate solvent to form a working solution, and use hydrogen gas to reduce the anthraquinone in the solvent to anthrahydroquinone under the action of a catalyst. The latter is oxidized by oxygen or air to anthraquinone and hydrogen peroxide. The hydrogen peroxide in the solution is extracted with water, and then purified and concentrated to obtain hydrogen peroxide products of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/04B01J21/06B01J37/08B01J35/10B01J23/44B01J37/02C01B15/023
Inventor 钱东于向真胡学武刘志坚
Owner CHINA PETROLEUM & CHEM CORP