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Palladium-based hydrogenation catalyst and application of palladium-based hydrogenation catalyst to anthraquinone hydrogenation

A catalyst and a palladium-based technology are applied to a palladium-based hydrogenation catalyst and its application field in the hydrogenation of anthraquinone, can solve problems such as increased consumption of anthraquinone, desorption of unfavorable reaction products, etc., and achieve improved hydration resistance and active and improved wear resistance

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acidity of the catalyst carrier is too high, which is not conducive to the desorption of the reaction product, and is prone to produce transitional hydrogenation by-products, increasing the consumption of anthraquinone

Method used

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  • Palladium-based hydrogenation catalyst and application of palladium-based hydrogenation catalyst to anthraquinone hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Carrier preparation

[0035] Add 3kg of deionized water in the stirred kettle, add 300g of pseudo-boehmite (Germany Condea company, PURAL SB, the same below), after stirring and mixing evenly, add zirconium oxychloride (Sia reagent, 99%, the same below) solid, so that the mass ratio of zirconium to aluminum is ZrO 2 :Al 2 o 3 =1:4, continue stirring to mix evenly. Take 2 L of the pre-prepared 1 mol / L lithium nitrate solution, add it to the above slurry, stir and mix evenly to obtain a mixed slurry. The mixed slurry is dried and formed by spray drying equipment. The operating conditions of spray drying are hot air inlet temperature 250°C and exhaust air outlet temperature 150°C. The solid particle powder obtained after spray drying was calcined at 650° C. for 8 hours to obtain the desired carrier.

[0036] (2) Catalyst preparation

[0037] Dissolve 0.168g of palladium chloride in 10mL of deionized water, take 10g of the carrier obtained in step (1), disperse t...

Embodiment 2

[0039] (1) Carrier preparation

[0040] Add 3kg of deionized water to the stirred tank, start stirring and add 300g of pseudoboehmite, after stirring and mixing evenly, add zirconium oxychloride solid, so that the mass ratio of zirconium to aluminum is ZrO 2 :Al 2 o 3=1:15, continue to stir and mix evenly. Take 1.75 L of a pre-prepared 1 mol / L lithium nitrate solution, add it to the above slurry, stir and mix evenly to obtain a mixed slurry. The mixed slurry is dried and formed by spray drying equipment. The operating conditions of spray drying are hot air inlet temperature 300°C and exhaust air outlet temperature 200°C. The solid particle powder obtained after spray drying was calcined at 650° C. for 8 hours to obtain the desired carrier.

[0041] (2) Catalyst preparation

[0042] Dissolve 0.168g of palladium chloride in 10mL of deionized water, take 10g of the carrier obtained in step (1), disperse the carrier into the palladium chloride solution, soak at 40°C for 10h, ...

Embodiment 3

[0044] (1) Carrier preparation

[0045] Add 3kg of deionized water into the stirred tank, start stirring and add 300g of pseudoboehmite, after stirring and mixing evenly, add zirconium oxychloride solid, so that the mass ratio of zirconium to aluminum is ZrO 2 :Al 2 o 3 =1:30, continue to stir and mix evenly. Take 1.7 L of a pre-prepared 1 mol / L lithium nitrate solution, add it to the above slurry, stir and mix evenly to obtain a mixed slurry. The mixed slurry is dried and formed by spray drying equipment. The operating conditions of spray drying are hot air inlet temperature 300°C and exhaust air outlet temperature 200°C. The solid particle powder obtained after spray drying was calcined at 650° C. for 6 hours to obtain the desired carrier.

[0046] (2) Catalyst preparation

[0047] Dissolve 0.168g of palladium chloride in 10mL of deionized water, take 10g of the carrier obtained in step (1), disperse the carrier into the palladium chloride solution, soak at 60°C for 6h,...

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Abstract

The invention discloses a palladium-based catalyst. The palladium-based catalyst is characterized in that composite oxide prepared by zirconium dioxide and activated aluminum oxide and modified by lithium is used as a supporter, palladium is used as a main active component, one or more of magnesium, calcium, lanthanum, cerium, ferrum, cobalt, nickel and zinc is selected as an assistant active component, the mass ratio of zirconium dioxide ZrO2 and activated aluminum oxide AlO2O3 is 1: (1-40), the mass content of lithium in the supporter is 0.1-20%, the mass content of palladium in the catalyst is 0.02-10%, and the mass content of the assistant active component in the catalyst is 0-8%. Compared with the prior art, the catalyst is obviously improved in the aspects of activity, wearing resistance and anti-hydration performance.

Description

technical field [0001] The invention relates to a palladium-based hydrogenation catalyst and its application, and further the invention relates to a modified palladium-based hydrogenation catalyst and its application in anthraquinone hydrogenation. Background technique [0002] As an ideal green chemical, hydrogen peroxide is widely used in the fields of chemical synthesis, industrial bleaching and environmental protection. The anthraquinone method is currently the most widely used method for producing hydrogen peroxide at home and abroad. The principle of the method is that alkyl anthraquinone is hydrogenated under the action of hydrogen and a catalyst to generate alkyl anthrahydroquinone, and then the generated alkyl anthrahydroquinone is restored to alkyl anthraquinone under the action of oxygen oxidation, and hydrogen peroxide is generated at the same time. Among them, the alkylanthraquinone hydrogenation process is the core of the anthraquinone process. [0003] In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01J23/60B01J23/89B01J23/63C01B15/023
Inventor 郑帅潘智勇孟祥堃慕旭宏宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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