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Catalyst for continuously producing pentanone by ketene hydrogenation as well as preparation method and application thereof

A catalyst and enone technology, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the high cost of enone hydrogenation catalysts and the cumbersome operation of the kettle process , power consumption and other problems, to achieve the effect of preventing thixotropy, improving catalyst activity and selectivity, and high production efficiency

Active Publication Date: 2019-11-22
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of high cost, low selectivity, cumbersome operation of the kettle-type process, many wastes, small output, large power consumption and difficult separation in the prior art.

Method used

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  • Catalyst for continuously producing pentanone by ketene hydrogenation as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. A catalyst for the continuous production of pentanone by hydrogenation of ketene, consisting of a carrier, an active component and an auxiliary agent attached to the carrier, the active component includes A component and B component, and the auxiliary agent includes C component, D component and E component;

[0045] The carrier is pseudo-boehmite containing amorphous silica-alumina, and the SiO in the carrier 2 The content is 0.3-5%, and the specific surface area of ​​the carrier is 160-350m 2 / g, pore volume 0.5 -1.0 cm 3 / g;

[0046] According to the mass percentage of the carrier on a dry basis, the A component is Ni with a content of 60%, the B component is Mo with a content of 8%, and the C component is Zn with a content of 6%. The D component is Ce with a content of 1%, and the E component is B with a content of 1.3%;

[0047] 2. the preparation method of described catalyst, comprises the following steps:

[0048] (1) The carrier was dried at 80°C to const...

Embodiment 2

[0055] 1. A catalyst for the continuous production of pentanone by hydrogenation of ketene, consisting of a carrier, an active component and an auxiliary agent attached to the carrier, the active component includes A component and B component, and the auxiliary agent includes C component, D component and E component;

[0056] Described carrier is with embodiment 1;

[0057] According to the mass percentage of the carrier on a dry basis, the A component is Ni with a content of 60%, the B component is Mo with a content of 10%, and the C component is Zn with a content of 5%. The D component is Ce, and the content is 1.1%, and the E component is B, and the content is 1.5%;

[0058] The preparation method is the same as in Example 1, and the obtained catalyst is denoted as S2.

Embodiment 3

[0060] 1. A catalyst for the continuous production of pentanone by hydrogenation of ketene, consisting of a carrier, an active component and an auxiliary agent attached to the carrier, the active component includes A component and B component, and the auxiliary agent includes C component, D component and E component;

[0061] Described carrier is with embodiment 1;

[0062] According to the mass percentage of the carrier on a dry basis, the A component is Ni with a content of 65%, the B component is Mo with a content of 9%, and the C component is Zn with a content of 7%. The D component is Ce, and the content is 0.8%, and the E component is B, and the content is 1.2%;

[0063] The preparation method is the same as in Example 1, and the obtained catalyst is denoted as S3.

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Abstract

The invention discloses a catalyst for continuous production of pentanone by ketene hydrogenation. The catalyst is composed of a carrier, active components attached to the carrier and an auxiliary agent, wherein the active components comprise a component A and a component B, and the auxiliary agent comprises a component C, a component D and a component E; the component A is Ni; the component B isat least one of Mo, Wu and Cr; the component C is at least one of V, Zn and Cu; the component D is at least one of lanthanide series elements; the component E is at least one of P, B and N; and the carrier is pseudo-boehmite containing amorphous silica-alumina. Meanwhile, the invention also discloses a preparation method and application of the catalyst. The catalyst is stable in activity and longin service lifetime, and when the catalyst is used for preparing pentanone through ketene hydrogenation, the molar conversion rate of raw materials is larger than 99%, and the product selectivity is larger than 98%.

Description

technical field [0001] The invention belongs to the technical field of producing pentanone, and in particular relates to a catalyst for continuously producing pentanone by hydrogenation of enone, a preparation method and application thereof. Background technique [0002] 4 ,4-Dimethyl-1-(4-chlorophenyl)-3-pentanone is not only a key raw material for the synthesis of tebuconazole, but also an intermediate for the synthesis of many other compounds. At present, 4,4-dimethyl-1-(4-chlorophenyl)-3-pentanone is synthesized by two steps of condensation and hydrogenation using p-chlorobenzaldehyde and pinacolone as raw materials. In the process of preparing enone, sodium hydroxide is used as a catalyst and methanol as a solvent; in the process of preparing pentanone, precious metals, Raney nickel, sodium hydroxide, etc. are used as catalysts. [0003] At present, the hydrogenation of enone to pentanone mainly adopts the kettle process. For example, in the process of preparing penta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J23/887B01J27/24B01J27/199B01J27/19C07C45/62C07C49/233
CPCB01J23/866B01J23/8871B01J23/8873B01J23/8877B01J27/24B01J27/199B01J27/19C07C45/62C07C49/233Y02P20/584
Inventor 高明明程杰万克柔张力赵卓然张炳亮林涛曾永康
Owner XIAN CATALYST NEW MATERIALS CO LTD
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