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Process for hydrogenation of alkyl anthraquinone by using magnetically stabilized bed

A technology of alkyl anthraquinone and magnetically stabilized bed, applied in chemical instruments and methods, quinone preparation, inorganic chemistry, etc., to achieve the effects of less side reactions, less catalyst take-out, and high mass transfer efficiency

Active Publication Date: 2005-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] So far, there is no report on the hydrogenation of alkyl anthraquinones with ferromagnetic catalysts in a magnetically stabilized bed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example illustrates the preparation of the nickel-based amorphous alloy catalyst used in the method of the present invention.

[0024] Add 48 grams of nickel, 48 grams of aluminum, 1.5 grams of iron, and 2.5 grams of chromium into the quartz tube, heat it in a high-frequency furnace to above 1300°C and melt it to alloy it. Then spray the alloy liquid with inert gas from the nozzle under the quartz tube to a copper roller whose rotation speed is 800 rpm. There is cooling water in the copper roller, and the alloy liquid is thrown out along the tangent line of the copper roller after rapid cooling to form scale-like strips. The scale-like strips are ground to a particle diameter of 70 microns or less to obtain the master alloy. The master alloy is heat-treated in a hydrogen environment, the temperature of the heat treatment is 600° C., and the constant temperature time is 3 hours. The heat-treated master alloy was slowly added into a three-neck flask filled with 500...

Embodiment 2

[0027] This example illustrates the preparation of the nickel-based amorphous alloy catalyst used in the method of the present invention.

[0028] Add 48 grams of nickel, 48 grams of aluminum, and 13.5 grams of iron into the quartz tube, and heat it in a high-frequency furnace to above 1300°C to melt and alloy it. Then spray the alloy liquid with inert gas from the nozzle under the quartz tube to a copper roller whose rotation speed is 800 rpm. There is cooling water in the copper roller, and the alloy liquid is thrown out along the tangent line of the copper roller after rapid cooling to form scale-like strips. The scale-like strips are ground to a particle diameter of 70 microns or less to obtain the master alloy. The master alloy is heat-treated in a hydrogen environment, the temperature of the heat treatment is 600° C., and the constant temperature time is 3 hours. The heat-treated master alloy was slowly added into a three-neck flask filled with 500 g of 20% sodium hydr...

Embodiment 3

[0031] This example illustrates the pretreatment of Raney nickel catalysts used in the process of the present invention.

[0032] The Raney nickel catalyst used in the method of the present invention is conventionally used in the prior art. What used in this example was a commercially available product produced by Jiangsu Yangzhou Catalyst Factory.

[0033] Wash the Raney nickel stored in alkaline water with pH 13 with distilled water at 80°C until the pH value is 7, decant the water, and add an appropriate amount of C 9 Aromatics, remove water by azeotropic distillation under reduced pressure, store it at C 9 Reserved in aromatics.

[0034] The catalyst number is Catalyst-3, and its composition is Ni 87.5 al 12.5 .

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Abstract

The alkyl anthraquinone hydrogenating reduction process is that inside magnetically stabilized bed reactor, alkyl anthraquinone solution, hydrogen and ferromagnetic hydrogenating catalyst are contacted at the conditions including reaction temperature of 25-150 deg.c, reaction pressure of 0.1-2.0 MPa, liquid spatial velocity of 3-40 / hr, hydrogen / liquid phase material feeding volume ratio of 5-300 and magnetic field strength of 1000 Oe. The ferromagnetic hydrogenating catalyst is selected from non-crystalline nickel alloy, Raney nickel or magnetic carrier loaded noble metal catalyst. Compared with fixed bed process, the process of the present invention has the advantages of lower bed pressure drop, higher mass transfer efficiency, less side reactions and less anthraquinone degrading amount. Compared with fluidized bed process, the process of the present invention has higher mass transfer efficiency and less catalyst carrying out.

Description

technical field [0001] The invention relates to a method for hydrogenation of alkyl anthraquinone. More specifically, it relates to a method for hydrogenating alkylanthraquinones with a ferromagnetic catalyst in a magnetically stable bed, and the hydrogenated products are used in the production process of hydrogen peroxide. Background technique [0002] Hydrogen peroxide is an important chemical product, widely used as oxidizing agent, bleaching agent, disinfectant, polymer initiator and crosslinking agent in papermaking, textile, chemical synthesis, military industry, electronics, food processing, medicine, cosmetics, Environmental protection, metallurgy and other fields. [0003] The anthraquinone method is the main method for producing hydrogen peroxide. The production of hydrogen peroxide by the anthraquinone method is to dissolve the alkyl anthraquinone (referred to as anthraquinone) in an appropriate solvent to make an anthraquinone working solution, make it catalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C50/18
Inventor 孟祥堃陈西波慕旭宏张晓昕宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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