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A kind of preparation method and application of catalyst for preparing methyl heptanone by one-step method

A catalyst and carbonization technology, which is applied in the direction of catalyst activation/preparation, catalyst protection, physical/chemical process catalysts, etc., can solve the problems of lengthening the process route of methyl heptanone, etc., to improve selectivity, increase activity, and change electron arrangement Effect

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The above process needs to adopt different types of catalysts such as condensation catalysts and hydrogenation catalysts, which also leads to lengthening of the process route for preparing methyl heptanone

Method used

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  • A kind of preparation method and application of catalyst for preparing methyl heptanone by one-step method
  • A kind of preparation method and application of catalyst for preparing methyl heptanone by one-step method
  • A kind of preparation method and application of catalyst for preparing methyl heptanone by one-step method

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Embodiment

[0064] Embodiment (abbreviated as S) 1-5 and comparative example (abbreviated as D) 1-3

[0065] Utilize the preparation method of the present invention to prepare the catalyst for the one-step preparation of methyl heptanone, and the preparation process comprises the following steps:

[0066] (1) mixing hydrotalcite, selenium source, nitrogen source, phosphorus source, and sulfur source according to a certain mass ratio, and preparing the active component of condensation reaction by ball milling and carbonization;

[0067] (2) adopt dipping process, load hydrogenation reaction palladium active component, obtain solid mixture;

[0068] (3) the solid mixture obtained in step (2) is coated with the catalyst active component by vapor deposition of multiple carbon sources (including gaseous carbon sources and solid carbon sources) and an etching process to obtain the catalyst; wherein, using The two-stage tubular carbonization furnace is used for carbonization and etching. The so...

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Abstract

The invention provides a preparation method and application of a catalyst for preparing methyl heptanone by a one-step method, comprising: (1) mixing hydrotalcite, selenium source, nitrogen source, phosphorus source and sulfur source according to a certain mass ratio, and ball milling, The carbonization process is used to prepare the active components of the condensation reaction; (2) the dipping process is used to support the active components of palladium in the hydrogenation reaction; (3) the active components of the catalyst are coated by the double carbon source vapor deposition and etching process to obtain the described catalyst. Using isovaleraldehyde and acetone as raw materials, under the atmosphere of hydrogen, under the catalysis of this catalyst, condensation / hydrogenation reaction occurs simultaneously to obtain methyl heptanone, which has high selectivity, high conversion rate, simple and easy operation, and can be recycled and applied. It has the advantages of less corrosion to equipment, etc., and is a green catalyst for the synthesis of methyl heptanone.

Description

technical field [0001] The invention relates to the preparation of methyl heptanone, in particular to a method for preparing a catalyst for preparing methyl heptanone by a one-step condensation / hydrogenation method and its application. Background technique [0002] Methylheptanone, the chemical name is 6-methyl-2-heptanone, is a colorless liquid with the aroma of lemongrass and butyl acetate, and an important intermediate for the synthesis of important medicines, flavors and fragrances. It is an important raw material for the synthesis of vitamin E. [0003] The structural formula of methyl heptanone is shown below: [0004] [0005] Chinese patent CN97120582 and European patent EP0816321 adopt the dropwise addition process, using acetone and isovaleraldehyde as raw materials, and using sodium hydroxide as a catalyst, a condensation reaction is performed to prepare methyl heptenone, and then a hydrogenation reaction is continued to prepare methyl heptenone. . The catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J33/00B01J35/10B01J37/00B01J37/02B01J37/08B01J37/10C07C45/73C07C49/04
CPCB01J37/10B01J33/00B01J35/10B01J37/084B01J37/0201B01J37/0036B01J27/24C07C45/73C07C49/04Y02P20/584
Inventor 宋军伟杨宗龙张涛张福昊王延斌
Owner WANHUA CHEM GRP CO LTD
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