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Supported CoxMy intermetallic compound catalyst as well as preparation and use methods thereof

A technology of intermetallic compounds and catalysts, which is applied in the field of catalysis, can solve the problems of catalyst active metal loss and metal loss, and achieve the effect of avoiding the loss of active metals, cobalt loss, separation of catalysts and products and recycling problems

Active Publication Date: 2021-10-08
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] So far, in the heterogeneous hydroformylation reaction, there is no relatively complete solution available for the loss of catalyst active metals, but only in Dissolution of CoCu Catalyst Step Defects by Co Subcarbonyl Formation.J.Catal. In 2018, 368, 31-37, it is mentioned that high coverage of CO will cause metals to form carbonyl compounds, resulting in the loss of metals

Method used

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  • Supported CoxMy intermetallic compound catalyst as well as preparation and use methods thereof
  • Supported CoxMy intermetallic compound catalyst as well as preparation and use methods thereof
  • Supported CoxMy intermetallic compound catalyst as well as preparation and use methods thereof

Examples

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Embodiment

[0087] Exemplary embodiments of the present invention are described below, in which various details of the embodiments of the present invention are included to facilitate understanding, and should be considered as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0088] The reagents, materials and devices used in the following examples can be purchased commercially unless otherwise specified.

preparation example 1

[0089] Preparation Example 1 Co content 3wt% Co 1 Ga 1 / SiO 2 Catalyst preparation

[0090] Weigh 0.75g Co(NO 3 ) 2 ·6H 2 O and 0.66g Ga(NO 3 ) 2 ·xH 2 O (purchased from Aladdin, analytically pure) and dissolved in 200 g deionized water to obtain 2+ and Ga 3+ of salt solution. Weigh 5.0g SiO2 2 Carrier (specific surface area 150m 2 / g, pore volume 0.9m 3 / g, average pore diameter 23.4nm) and immersed in the above solution, stirred at room temperature for 12h, and then rotary evaporated at 50°C to remove the deionized water from the resulting mixed solution to obtain a powdery solid mixture. The solid mixture was heated in a tube furnace under H 2 Under the atmosphere, the temperature was raised to 900°C at a rate of 2°C / min, and reduced at this temperature for 2 hours, wherein the hydrogen flow rate was 50ml / min, and the reduced catalyst was Co with a Co content of 3wt%. 1 Ga 1 / SiO 2 catalyst. Among them, the XRD pattern and transmission electron microscope im...

preparation example 2

[0091] Preparation Example 2 Co with a Co content of 1wt% 1 Ga 1 / C 3 N 4 Catalyst preparation

[0092] Weigh 0.25g Co(NO 3 ) 2 ·6H 2 O and 0.22g Ga(NO 3 ) 2 ·xH 2 O and dissolved in 200 g deionized water to obtain Co 2+ and Ga 3+ of salt solution. Weigh 5.0g C 3 N 4 Carrier (specific surface area 10m 2 / g, pore volume 0.05m 3 / g, average pore diameter 12nm) and immersed in the above solution, stirred at room temperature for 12h, and then rotary evaporated at 50°C to remove the deionized water from the resulting mixed solution to obtain a powdery solid mixture. The solid mixture was heated in a tube furnace under H 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 3°C / min, and reduced at this temperature for 3h, wherein the hydrogen flow rate was 50ml / min, and the reduced catalyst was Co with a Co content of 1wt%. 1 Ga 1 / C 3 N 4 catalyst.

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Abstract

The invention discloses a supported CoxMy intermetallic compound catalyst and a preparation method thereof, and a method for catalyzing hydroformylation reaction of olefin to generate aldehyde by using the supported CoxMy intermetallic compound catalyst. The catalyst comprises 1-10 parts of Co, 1-30 parts of M and 40-98 parts of a carrier, wherein M is Ga, Sn, In or Ge. When the supported CoxMy intermetallic compound catalyst provided by the invention is applied to catalysis of hydroformylation reaction of olefin to generate aldehyde, loss of active metal can be remarkably avoided, and the supported CoxMy intermetallic compound catalyst also has straight-chain aldehyde selectivity comparable to the straight-chain aldehyde selectivity of a homogeneous cobalt carbonyl catalyst; and the supported CoxMy intermetallic compound catalyst is easily separated from a product after reaction, so problems in separation and recycling of the homogeneous catalyst and the product are avoided, the problem of cobalt loss caused by formation of cobalt carbonyl by a conventional heterogeneous catalyst is also avoided, and the catalyst has good industrial application prospects.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a supported Co x m y Intermetallic catalysts, methods for their preparation, and methods of using them to catalyze hydroformylation reactions. Background technique [0002] Intermetallic compounds (IMCs) have a definite crystal structure, and their unique structural characteristics make them an important functional material. In recent years, they have shown broad application prospects in the research of catalytic materials, hydrogen storage materials, superconductor materials, and magnet materials. . Patent No. CN103223345B discloses a supported Ni-In intermetallic compound catalyst and its preparation method, which is used for selective hydrogenation reaction and has high reactant conversion rate and high product selectivity. [0003] Hydroformylation refers to the reaction of olefins with synthesis gas (CO, H 2 Mixed gas) reaction, the process of forming an aldehyde with one more C...

Claims

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Application Information

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IPC IPC(8): B01J23/825B01J27/224B01J27/24B01J29/04C07C45/50C07C47/02
CPCB01J23/825B01J27/24B01J29/044B01J27/224C07C45/50C07C47/02Y02P20/584
Inventor 温晓东赵娇娇杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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