Loaded platinum catalyst for hydrogenating alkyl anthraquinone

A hydrogenation catalyst, catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, inorganic chemistry, etc.

Inactive Publication Date: 2002-05-08
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US4800075 discloses a kind of Pd/α-Al 2 o 3 Catalyst, adding a small amount of Pt to it can make the catalyst maintain good activity and selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: Adopt 15g gamma-Al 2 o 3 The carrier has a shape and size of 20-50 mesh particles. 15ml of H containing Pt0.045g 2 PtCl 6 The solution was poured into 15 g of the above γ-Al 2 o 3 In the carrier, dry at 100-120°C for 3 hours, roast at 400-600°C for 3 hours, pour 15ml of KCl solution containing 0.015g K after cooling, dry at 100-120°C for 3 hours, and finally use N 2 -H 2 , airspeed 300h -1 , Reduction at 450°C for 3h, the desired catalyst can be prepared.

[0010] Put 7ml of the above catalyst into a Φ8 stainless steel reactor, react at 45°C and 0.2MPa, and the liquid space velocity is 11.4h -1 (volume space velocity), the hydrogenation efficiency of reaction is 11.75g ​​(H 2 o 2 ) / l, the selectivity is 98.6%.

Embodiment 2

[0011] Embodiment 2: The preparation method of the catalyst is the same as in Example 1, except that the second impregnation adopts 15 ml of CsNO with 0.009 g of Cs dissolved therein 3 solution, dried and reduced to obtain the desired catalyst.

[0012] Adopt this catalyzer 7ml, use the condition identical with embodiment 1, the hydrogenation efficiency of reaction is 8.08g (H 2 o 2 ) / l, the selectivity is 99.7%.

Embodiment 3

[0013] Embodiment 3: the preparation method of catalyst is the same as example 1, and the difference is that what impregnated for the second time adopts is that 15ml is dissolved with the Mg(NO of 0.009gMg 3 ) 2 solution, dried and reduced to obtain the desired catalyst.

[0014] Adopt this catalyzer 7ml, use the condition identical with embodiment 1, the hydrogenation efficiency of reaction is 7.98g (H 2 o 2 ) / l, the selectivity is 100%.

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Abstract

The loaded noble metal catalyst for hydrogenating alkyl anthraquinone has gamma-Al2O3 carrier, and contains Pt 0.2-0.4 wt%, and one of K2O, Cs2O, MgO, BaO, La2O3 and CeO2 0.3-1.2 wt%. The catalyst isprepared through soaking process and has high activity and high selectivity. The catalyst has a hydrogenating efficiency of 7.5-12g (H2O2)/L and a selectivity over 97 % at the conditions of 0.2 MPa pressure, 45 deg.c temperature and working liquid space velocity of 11.4 to the minus first /hr.

Description

[0001] Field [0002] The invention relates to a supported noble metal catalyst for producing hydrogen peroxide by an anthraquinone method and a preparation method thereof. Background technique [0003] The anthraquinone method is currently the most dominant method in the production of hydrogen peroxide at home and abroad, and the technology is relatively mature. Previously, nickel catalysts were used as catalysts for the hydrogenation of anthraquinones, but they were gradually eliminated due to their poor stability, easy spontaneous combustion in air, easy poisoning by oxygen and hydrogen peroxide, and difficulty in regeneration after failure. Since the 1960s, American Du Pont Company, FMC Company and Engelhard Company have successively developed and improved a series of Al 2 o 3 and SiO 2 These catalysts have good activity and selectivity, but the loading of noble metals is generally higher than 1%. In recent years, the price of Pd has continued to rise, while the price ...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/02C01B15/023
Inventor 朱向学刘淑文徐贤伦
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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