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Catalyst for preparing epsilon-caprolactone by oxidizing cyclohexanone/oxygen under aldehyde-assisted oxidizing action

A catalyst and pro-oxidation technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc., can solve the problem of high cost, poor selectivity and low yield of hydrogen peroxide And other issues

Active Publication Date: 2013-03-27
中科榆林能源技术运营有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of hydrogen peroxide is very high, and it may cause the hydrolysis of ε-caprolactone, while the yield is low and the selectivity is poor, the technology is not yet mature
The biological oxidation method uses biological enzymes or microorganisms to ferment and oxidize cyclohexanone to generate ε-caprolactone, which is currently only in the stage of laboratory development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The catalyst of embodiment 1 is 0.1%Co / SiO 2 . Weigh 10.0 g of SiO 2 (BET specific surface area 315m 2 / g, the average pore size is 12.2nm, 20-40 mesh), the configuration 11ml contains 0.0494 grams of Co(NO 3 ) 2 .6H 2 O aqueous solution, impregnating the above SiO with this aqueous solution 2 The carrier was air-dried, oven-dried at 120°C for 4 hours, and baked at 400°C for 4 hours.

Embodiment 2

[0022] Catalyst 0.25% Co / SiO of Example 2 2 . In addition to configuring 11ml containing 0.1236 grams of Co(NO 3 ) 2 .6H 2 O aqueous solution, all the other preparation steps are identical with embodiment 1.

Embodiment 3

[0024] Catalyst 0.5% Co / SiO of Example 3 2 . In addition to configuring 11ml containing 0.2472 grams of Co (NO 3 ) 2 .6H 2 O aqueous solution, all the other preparation steps are identical with embodiment 1.

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PUM

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Abstract

The invention relates to a supported Co-based catalyst for catalytically oxidizing cyclohexanone / oxygen into epsilon-caprolactone under aldehyde-assisted oxidizing action. By using the catalyst provided by the invention, cyclohexanone and oxygen can be converted into epsilon-cyclohexanone under aldehyde-assisted oxidizing action under mild reaction conditions. The catalyst is composed of a main active component, an assistant and a supporter, wherein the main active component is transition metal Co and / or Fe; the assistant is one or more of Ni, Cu, Mn, Zn and other metals and oxides thereof; and the supporter adopts SiO2, ZrO2, Al2O3 or the like. In a kettle reactor, by using acetonitrile as a solvent, the cyclohexanone and oxygen can be converted into the epsilon-caprolactone product at high activity and high selectivity at certain temperature by using the catalyst under the aldehyde-assisted oxidizing action.

Description

technical field [0001] The invention relates to a catalyst for preparing ε-caprolactone by oxidation of cyclohexanone / oxygen, and in detail relates to a catalyst for efficiently preparing ε-caprolactone with cyclohexanone and oxygen as raw materials under the oxidative action of aldehydes. technical background [0002] ε-caprolactone is an important intermediate in organic synthesis, mainly used in the synthesis of polycaprolactone, and can be improved by copolymerization and blending with other esters. Polycaprolactone has unique biocompatibility, degradability and good permeability, and has a wide range of applications in the fields of environmental protection and medical materials. In addition, ε-caprolactone can be used as a raw material for producing bulk organic chemicals such as 1,6-hexanedioic acid, 1,6-hexanediol, 1,6-hexanediamine and caprolactam. Therefore, the research on the synthesis of ε-caprolactone is of great significance. Since the synthesis of ε-caprola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/889B01J23/745C07D313/04
Inventor 丁云杰臧娟马立新程显波
Owner 中科榆林能源技术运营有限责任公司