Amorphous Catalyst for One-step Hydrogenation of Aqueous Phenol to Cyclohexanone

A catalyst, amorphous technology, used in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of uneven dispersion of active particles, cyclohexanone selectivity Low temperature, harsh reaction conditions and other problems, to achieve the effect of fast reaction speed, high activity and mild reaction conditions

Active Publication Date: 2020-08-25
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above results show that the currently studied catalyst system for the hydrogenation of phenol to cyclohexanone has many problems, such as high cost, harsh reaction conditions, unfriendly solvents, uneven dispersion of active particles, and low selectivity of cyclohexanone. Therefore, it is urgent to design and develop A new catalyst system that is cheap and easy to obtain, mild in reaction conditions, friendly to the medium environment, and well balanced in phenol conversion and cyclohexanone selectivity

Method used

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  • Amorphous Catalyst for One-step Hydrogenation of Aqueous Phenol to Cyclohexanone
  • Amorphous Catalyst for One-step Hydrogenation of Aqueous Phenol to Cyclohexanone
  • Amorphous Catalyst for One-step Hydrogenation of Aqueous Phenol to Cyclohexanone

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Using the equal volume impregnation method, according to the catalyst composition 30% Ni-Cu-Ce-B / γ-Al 2 o 3 , where γ-Al 2 o 3 Calculated, the loading of Ni is 15%, the loading of B is 5%, the loading of Cu is 5%, and the loading of Ce is 5%. Dissolve 12.1g nickel nitrate, 3.1g copper nitrate, 2.5g cerium nitrate Add dropwise to 16.3g γ-Al in 27mL distilled water 2 o 3 on, stirred at 70°C until the solution was evaporated to dryness, and then the impregnated γ-Al 2 o 3 Dry at 110°C for 4 hours; 2 o 3 Add 75mL of 1.0mol / L KBH dropwise 4 Aqueous solution, until no bubbles are generated, continue to stir for 30 minutes, remove the liquid, wash the obtained black spherical solid with deionized water until neutral, wash with absolute ethanol 1 or 2 times, and dry at 70°C for 4 hours , to get 30% Ni-Cu-Ce-B / γ-Al 2 o 3 catalyst.

Embodiment 2

[0023] Using the equal volume impregnation method, according to the catalyst composition 30% Ni-Cu-B / γ-Al 2 o 3 , where γ-Al 2 o 3 Calculated, the loading of Ni is 15%, the loading of B is 5%, and the loading of Cu is 10%. Dissolve 12.1g of nickel nitrate and 6.1g of copper nitrate in 27mL of distilled water and add them dropwise to 16.3g of γ-Al 2 o 3 on, stirred at 70°C until the solution was evaporated to dryness, and then the impregnated γ-Al 2 o 3 Dry at 110°C for 4 hours; 2 o 3 Add 75mL of 1.0mol / L KBH dropwise 4 Aqueous solution, until no bubbles are generated, continue to stir for 30 minutes, remove the liquid, wash the obtained black spherical solid with deionized water until neutral, wash with absolute ethanol 1 or 2 times, and dry at 70°C for 4 hours , to get 30% Ni-Cu-B / γ-Al 2 o 3 catalyst.

[0024] The inventor adopts thermogravimetric analyzer to characterize the catalyst prepared by comparative example 1 and embodiment 1, embodiment 2, the results are...

Embodiment 3

[0033] In Example 1, the γ-Al used 2 o 3 Replace with activated carbon of equal quality, other steps are identical with embodiment 1, obtain 30%Ni-Cu-Ce-B / activated carbon catalyst.

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Abstract

The invention discloses an amorphous catalyst for one-step preparation of cyclohexanone through aqueous phase phenol hydrogenation. The catalyst takes gamma-Al2O3 or activated carbon as a carrier, takes Ni and B as active ingredients and takes transition metal and / or Ce as auxiliaries. By carrier mass, the total capacity of the active ingredients and the auxiliaries is 15-35%. When the auxiliaries are the transition metal and Ce, the transition metal is any one of Cu, Fe and Co. When the auxiliaries are the transition metal or Ce, the transition metal is Cu. The amorphous catalyst is cheap and easy to obtain and has high specific surface area and suitable duct structure, the active ingredients and the auxiliaries are small in particle size and are evenly dispersed on the carrier, and the amorphous catalyst has good heat stability and good chemical stability. When the amorphous catalyst is used for phenol hydrogenation, cyclohexanone can be prepared highly selectively while the conversion rate of phenol is high, in a clean water phase at a low pressure and a low temperature.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an amorphous catalyst used for one-step preparation of cyclohexanone by aqueous phase phenol hydrogenation. Background technique [0002] Cyclohexanone is a good solvent and a very important intermediate of industrial raw material synthetic fiber nylon 66 and nylon 6, widely used in medical treatment, aerospace, construction and other aspects. The production process of selective hydrogenation of phenol with high content in bio-oil to prepare cyclohexanone in one step, and then separating it in time can not only reduce the oxygen content of bio-oil, improve the quality of bio-oil, but also make full use of the intermediate product cyclohexanone Ketones have broad application prospects. Compared with the two-step method in which phenol is saturated and hydrogenated to cyclohexanol first, and then dehydrogenated at high temperature to generate cyclohexanone, it is mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/00C07C49/403B01J23/83B01J23/755B01J37/02B01J37/16
CPCB01J23/755B01J23/83B01J37/0201B01J37/16C07C45/006C07C49/403
Inventor 徐海升王博刘雪梅
Owner XI'AN PETROLEUM UNIVERSITY
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