Method for preparing KA oil and derivatives of KA oil by electrocatalytic hydrogenation of lignin-based phenolic compounds

A technology of electrocatalytic hydrogenation and compound electricity, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost of raw materials and catalysts, environmental pollution, Complicated production process and other issues, to achieve the effects of large-scale industrial production, cost reduction, and high conversion rate of raw materials

Active Publication Date: 2018-10-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for lignin-based phenolic compounds in order to overcome the problems of high cost of raw materials and catalysts, complex production process and serious environmental pollution in the existing KA oil and derivative synthesis process. As a raw material, the method and application of electrocatalytic hydrogenation synthesis of KA oil and its derivatives with environmental protection and high reaction efficiency

Method used

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  • Method for preparing KA oil and derivatives of KA oil by electrocatalytic hydrogenation of lignin-based phenolic compounds
  • Method for preparing KA oil and derivatives of KA oil by electrocatalytic hydrogenation of lignin-based phenolic compounds
  • Method for preparing KA oil and derivatives of KA oil by electrocatalytic hydrogenation of lignin-based phenolic compounds

Examples

Experimental program
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Effect test

Embodiment A

[0040] Example A The preparation method of the loading capacity of 0.5% platinum and 1% nickel supported mesoporous carbon catalyst Pt-NiB / MC is as follows:

[0041] 1) Take 100 g of mesoporous carbon (MC) as the carbon carrier, according to the loading amount of platinum element loaded on the mesoporous carbon carrier The amount is based on the mass of the mesoporous carbon carrier as 1wt%, and the theoretical amount of platinum chloride and nickel sulfate hexahydrate corresponding to the required platinum element is calculated, and 0.87 grams of platinum chloride and 4.49 grams of nickel sulfate hexahydrate are dissolved in 400 mL In water, the corresponding solution of platinum salt and nickel salt is prepared, the mesoporous carbon is immersed in the salt solution, and stirred at room temperature for 12 hours, so that the platinum salt and nickel salt solution are evenly dispersed on the surface of the mesoporous carbon carrier, which is called A solution;

[0042] 2) Dis...

Embodiment B

[0046] Embodiment B load is 2% palladium, the preparation method of 4% iron supported activated carbon catalyst Pd-FeB / AC is as follows:

[0047] 1) Take 100 grams of activated carbon (AC) as the carbon carrier, according to the loading amount of palladium element loaded on the activated carbon carbon carrier, the mass of the carbon carrier is 2 wt%, and according to the loading amount of the iron element loaded on the activated carbon carrier The mass of carrier is 4wt%, and the theoretical dosage of 3.33 grams of palladium chloride and 17.28 grams of ferric nitrate corresponding to the required palladium element is calculated, and the palladium chloride and ferric nitrate of theoretical dosage are dissolved in 500 mL of water to form corresponding palladium salts and iron salt solution, activated carbon is soaked in the salt solution, stirred at room temperature for 10 hours, so that the palladium salt and iron salt solution are evenly dispersed on the surface of the activate...

Embodiment C

[0052] Example C The loading capacity is 5% ruthenium, the preparation method of 10% cobalt supported carbon nanotube catalyst Ru-CoB / CNTs is as follows:

[0053] 1) Take 50 grams of carbon nanotubes (CNTs) as the carbon carrier. According to the loading amount of ruthenium element loaded on the carbon nanotube carrier, the mass of the carbon nanotube carrier is 5 wt%. According to the cobalt element loaded on the carbon nanotube carrier The loading capacity is 10 wt% with the mass of carbon nanotube carrier, calculate the theoretical dosage of 5.14 grams of ruthenium trichloride and 24.70 grams of cobalt nitrate corresponding to the required ruthenium element, dissolve the gram of ruthenium chloride of theoretical dosage and the gram of cobalt nitrate Prepare the corresponding ruthenium salt and cobalt salt solution in 300 mL water, impregnate the carbon nanotubes in the salt solution, and stir at room temperature for 8 hours, so that the ruthenium salt and cobalt salt solutio...

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Abstract

The invention relates to a method for preparing KA oil and derivatives by electrocatalytic hydrogenation of lignin-based phenolic compounds. According to the method, an H-shaped electrolytic cell is used as a container, in a negative pole chamber of the electrolytic cell, carbon fiber cloth is coated with a supported composite catalyst as a working electrode, and the lignin-based phenolic compounds are used as reaction substrates to be dissolved in an acidic solution as a negative pole solution; and a positive pole chamber uses a platinum sheet as a counter electrode and the acidic solution aspositive pole liquid, an electrocatalytic hydrogenation reaction is carried out at the temperature of 30-90 DEG C for 0.5-2 hours, and the KA oil and the derivatives of the KA oil are obtained afterpost-treatment. By the adoption of the method, by adopting the composite catalyst, the service life of the catalyst is greatly prolonged, and the conversion rate of the lignin-based phenolic compoundsreaches over 90-99%, the selectivity of the KA oil and the derivatives of the KA oil reaches over 90-95%, the Faraday efficiency can reach 80-90%, the cost is low, environmental protection is realized, the technological process is simple, the supported composite catalyst is recyclable, the production cost lowered, and the method has the high industrial value.

Description

technical field [0001] The invention relates to a synthesis method of organic chemical products, in particular to a method for preparing KA oil and its derivatives through electrocatalytic hydrogenation of lignin-based phenolic compounds. Background technique [0002] KA oil (cyclohexanol and cyclohexanone) and its derivatives are important fine chemical intermediates, widely used in the synthesis and production of nylon (polyamide) 66, pharmaceuticals, dyes, fragrances and pesticides. In addition, due to the development of many new uses of KA oil and its derivatives in recent years, the market demand continues to increase. [0003] At present, the homogeneous catalytic oxidation of cyclohexane and its derivatives is widely used in industry to prepare KA oil and its derivatives. This method has problems such as low conversion rate, poor selectivity, and serious environmental pollution. Therefore, it is of great significance to find a catalytic method that can maximize the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/04C25B11/12C25B11/08C25B11/06B01J23/89C25B3/25
CPCB01J23/8906B01J23/8913B01J23/892C25B3/25C25B11/057C25B11/093Y02P20/584
Inventor 钟兴周域霖王建国
Owner ZHEJIANG UNIV OF TECH
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