A kind of method of alkylanthraquinone hydrogenation

A technology of alkyl anthracene and hydrogenation catalyst, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as shortening service life, affecting catalyst fluidization, affecting catalyst utilization efficiency, etc., and achieves long-term The effect of service life

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the fluidized bed of this process is equipped with wire mesh packing, it greatly affects the fluidization of the catalyst, which makes the catalyst unevenly distributed in the bed and affects the utilization efficiency of the catalyst.
[0009] In addition, in the hydrogenation of anthraquinone, the purity of hydrogen is very high, and the impurity CO is required to reach the ppb level, because H 2 Medium CO can poison the palladium catalyst and shorten its service life

Method used

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  • A kind of method of alkylanthraquinone hydrogenation
  • A kind of method of alkylanthraquinone hydrogenation
  • A kind of method of alkylanthraquinone hydrogenation

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preparation example Construction

[0019] The preparation method of the hydrogenation catalyst described in the method of the present invention preferably comprises the following steps:

[0020] a. Dry the activated alumina powder and measure the saturated water absorption;

[0021] b. According to P 2 O 5 / Al 2 O 3 The mass ratio of 0.001 to 0.3 is used to calculate the P required for 100g of activated alumina 2 O 5 , and then calculate the corresponding required mass of phosphorus-containing compounds;

[0022] c. Weigh the required amount of deionized water and phosphorus-containing compound, prepare a solution of corresponding phosphorus-containing compound, fully mix with activated alumina, dry, and roast to obtain a carrier;

[0023] D, impregnate the carrier that step c obtains with the solution that contains palladium compound, ruthenium compound and the compound containing co-active component of required amount, and drips NaOH solution to obtain catalyst precursor suspension;

[0024] e. Then pa...

Embodiment 1

[0032] (1) Carrier preparation

[0033] Weigh 100g γ-Al 2 O 3 (Jiangyan City Chemical Auxiliary Factory, Jiangsu Province, with a surface area of ​​150m 2 / g, the pore volume is 0.4mL / g, the particle size is 30-150μm), the saturated water absorption is determined to be 70mL, according to P 2 O 5 / Al 2 O 3 Weigh 3.25g of ammonium dihydrogen phosphate with a mass ratio of 0.02 and add it to 70mL of deionized water required for weighing to prepare a corresponding ammonium phosphate solution, mix with activated alumina and stir evenly, and then move it into an oven to dry at 120°C for 4h. The dried samples were calcined at 550 °C for 8 h to obtain the desired carrier.

[0034] (2) Catalyst preparation

[0035] Measure 100mL of aqueous solutions with palladium chloride and ruthenium chloride concentrations of 7.5g / L and 7.5g / L respectively, take 75g of the carrier obtained in step (1), disperse the carrier into the above solution, immerse it at room temperature for 12h, drop...

Embodiment 2

[0037] (1) Carrier preparation

[0038] Weigh 100g γ-Al 2 O 3 (Jiangyan City Chemical Auxiliary Factory, Jiangsu Province, with a surface area of ​​150m 2 / g, the pore volume is 0.4mL / g, the particle size is 30-150μm), the saturated water absorption is determined to be 70mL, according to P 2 O 5 / Al 2 O 3 Weigh 8.2 g of ammonium dihydrogen phosphate with a mass ratio of 0.05 and add it to 70 mL of deionized water required for weighing to prepare a corresponding ammonium phosphate solution, mix with activated alumina and stir evenly, and then move it into an oven to dry at 120 ° C for 4 hours. The dried samples were calcined at 550 °C for 8 h to obtain the desired carrier.

[0039] (2) Catalyst preparation

[0040] Measure 100mL of aqueous solutions with palladium chloride and ruthenium chloride concentrations of 7.5g / L and 7.5g / L respectively, take 75g of the carrier obtained in step (1), disperse the carrier into the above solution, immerse it at room temperature for 1...

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Abstract

A method for the hydrogenation of alkyl anthraquinone, characterized in that the method comprises contacting an alkyl anthraquinone working solution with hydrogen in the presence of a hydrogenation catalyst; it is characterized in that the hydrogenation catalyst is activated alumina modified with phosphorus as The carrier, with palladium and ruthenium as the main active components, and one or more selected from silver, copper, cobalt, lanthanum, cerium, manganese, iron and nickel as auxiliary active components, in the described phosphor modified In the activated alumina carrier, the mass content of the phosphorus in the carrier is 0.1~30%; the mass content of the palladium and ruthenium in the catalyst is 0.01~10% and the mass ratio of palladium and ruthenium is 0.2~30% 6:1; the mass content of the auxiliary active component in the catalyst is 0-8%. The method of the invention does not have strict requirements on the content of hydrogen impurities such as CO, and the catalyst has a longer service life.

Description

technical field [0001] The present invention relates to a method for the hydrogenation of alkyl anthraquinones. Background technique [0002] H 2 O 2 The O atom in is the inequality sp 2 Hybrid, its oxidation number is -1, so one of its characteristic chemical properties is oxidation. Since its final product as an oxidant is water, it will not cause secondary pollution to the environment, so it is an ideal green oxidant and is widely used in almost all industrial fields, especially chemical and environmental protection. Emerging green chemical processes such as cyclohexanone ammoximation to prepare caprolactam and propylene epoxidation to prepare propylene oxide, etc., further expand H 2 O 2 the use of. [0003] Although a variety of methods can produce H 2 O 2 , such as isopropanol auto-oxidation method, oxygen cathode reduction method, hydrogen-oxygen direct synthesis method and anthraquinone method, etc., but more than 98% of hydrogen peroxide products in the worl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C35/40C07C29/145C01B15/023B01J27/185
CPCC07C29/145C01B15/023B01J27/1856C07C35/40Y02P20/584
Inventor 张晓昕邓明杨王宣宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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