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Preparation method and application of carbonyl hydrogenation catalyst

A technology of hydrogenation catalyst and carbonyl group, which is applied in the field of preparation of carbonyl hydrogenation catalyst, can solve the problems that the catalyst cannot achieve the expected catalytic effect, reduce the use efficiency of the catalyst, and the performance cannot be fully exerted, so as to improve the activity of the catalyst and enrich the acid-base sites and surface groups to improve the effect of hydrophilic properties

Active Publication Date: 2019-09-13
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For low-temperature carbonyl hydrogenation reaction systems, carbonyl chemisorption is affected by catalyst activity, and some catalysts cannot achieve the expected catalytic effect in certain types of reactions
In the hydrogenation process, due to the influence of the reaction type, physical and chemical parameters and reaction conditions, the performance of the palladium carbon catalyst cannot be fully exerted, which greatly reduces the use efficiency of the catalyst.

Method used

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  • Preparation method and application of carbonyl hydrogenation catalyst
  • Preparation method and application of carbonyl hydrogenation catalyst

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Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of the carbonyl hydrogenation catalyst of the present embodiment may further comprise the steps:

[0032] Step 1, adding 100 g of activated carbon to 600 g of hydrochloric acid solution with a mass concentration of 2%, cooking at 80°C for 1 hour, filtering, washing the filtered activated carbon with pure water until the pH is 6, and obtaining acid-treated activated carbon;

[0033] Step 2, adding the acid-treated activated carbon obtained in step 1 into 500 g of a sodium hydroxide solution with a mass concentration of 15%, cooking at 70° C. for 2 h, filtering, and washing the filtered activated carbon with pure water until the pH is 8 , to obtain alkali-treated activated carbon;

[0034] Step 3, the alkali-treated gac obtained in step 2 is added to 1000 g of a mass concentration of 5% nitric acid solution, boiled for 2 h at 110° C., filtered, and the filtered gac is washed with pure water until the pH is 6 to obtain Oxygenated activated carbon;

...

Embodiment 2

[0040] The preparation method of the carbonyl hydrogenation catalyst of the present embodiment may further comprise the steps:

[0041] Step 1, adding 100 g of activated carbon to 1000 g of hydrochloric acid solution with a mass concentration of 5%, cooking at 110° C. for 0.25 h, filtering, washing the filtered activated carbon with pure water until the pH is 7, and obtaining acid-treated activated carbon;

[0042] Step 2, the acid-treated activated carbon obtained in step 1 is added to 800 g of a mass concentration of 25% sodium hydroxide solution, boiled for 0.5 h at 90° C., filtered, and the filtered activated carbon is washed with pure water until the pH is 7, obtain the activated carbon of alkali treatment;

[0043] Step 3, the alkali-treated activated carbon obtained in step 2 is added to 2000g of a mass concentration of 15% nitric acid solution, boiled for 5h at 80°C, filtered, and the filtered activated carbon is washed with pure water to a pH of 7 to obtain Oxygenate...

Embodiment 3

[0049] The preparation method of the carbonyl hydrogenation catalyst of the present embodiment may further comprise the steps:

[0050] Step 1, adding 100 g of activated carbon to 800 g of hydrochloric acid solution with a mass concentration of 3%, cooking at 100° C. for 0.5 h, filtering, washing the filtered activated carbon with pure water until the pH is 8, and obtaining acid-treated activated carbon;

[0051] Step 2. Add the acid-treated activated carbon obtained in step 1 into 600 g of 20% sodium hydroxide solution, cook for 1 h at 80° C., filter, and wash the filtered activated carbon with pure water until the pH is 6. , to obtain alkali-treated activated carbon;

[0052] Step 3, the alkali-treated gac obtained in step 2 is added to 1500 g of a mass concentration of 10% nitric acid solution, boiled for 3 h at 100° C., filtered, and the filtered gac is washed with pure water to a pH of 8 to obtain Oxygenated activated carbon;

[0053] Step 4, adding the oxidized activat...

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Abstract

The invention discloses a preparation method of a carbonyl hydrogenation catalyst. The method comprises the steps of: cooking activated carbon with hydrochloric acid, and performing filtering and washing; cooking the acid treated activated carbon with an alkaline solution, and performing filtering and washing; cooking the alkali treated activated carbon with an oxidizing agent solution, and performing filtering and washing; adding the activated carbon subjected to oxidation treatment into a modifier solution, and performing stirring to obtain a modified activated carbon slurry; mixing a palladium chloride solution with a copper salt solution, adding the mixed solution of palladium chloride and copper salt into the activated carbon slurry, and performing stirring to obtain a loaded palladium-copper suspension precursor; and reducing the loaded palladium-copper suspension precursor, and conducting filtering, washing and centrifugal drying to obtain the carbonyl hydrogenation catalyst. Inaddition, the invention also provides application of the carbonyl hydrogenation catalyst prepared by the above method in the hydrogenation reaction of p-methylacetophenone. The preparation method provided by the invention is simple, and the carbonyl hydrogenation catalyst prepared by the method has high catalytic activity in the hydrogenation reaction of p-methylacetophenone.

Description

technical field [0001] The invention belongs to the technical field of noble metal catalysts, and in particular relates to a preparation method and application of a carbonyl hydrogenation catalyst. Background technique [0002] Palladium carbon catalyst is a new type of material prepared by loading precious metal palladium on the carrier activated carbon. It has the characteristics of small feeding amount, high activity, stable performance, green environmental protection and easy recycling. It is used in the pharmaceutical industry, petrochemical industry, dye and fragrance industry. , electronics industry and other fine chemical hydrogenation reduction process is widely used. In the synthesis of fine chemicals, palladium carbon catalysts are mainly used for hydrogenation and oxidation reactions, such as alkyne (triple bond) hydrogenation, alkenes (double bond) hydrogenation, carbonyl hydrogenation, nitro hydrogenation and hydroxyl oxidation and Phenolic oxidation, etc. Th...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C29/145C07C33/22
CPCB01J23/8926C07C29/145C07C33/22Y02P20/584
Inventor 翟康张涵张力张磊王昭文李岳锋万克柔曾永康
Owner XIAN CATALYST NEW MATERIALS CO LTD
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