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Cobalt nitride-nickel gallium liquid alloy composite catalyst and preparation method and application thereof

A technology of composite catalyst and liquid alloy, which is applied in the direction of carbon compound catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., and can solve the problem of high catalyst cost

Pending Publication Date: 2021-11-30
TAIZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of catalytic selective hydrogenation to remove trace acetylene, the main core lies in the selection of hydrogenation catalyst, while the catalyst commonly used in industry is the noble metal Pd as the main catalyst, in addition, additives such as Ag and Au need to be added, and the cost of the catalyst is relatively high

Method used

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  • Cobalt nitride-nickel gallium liquid alloy composite catalyst and preparation method and application thereof
  • Cobalt nitride-nickel gallium liquid alloy composite catalyst and preparation method and application thereof
  • Cobalt nitride-nickel gallium liquid alloy composite catalyst and preparation method and application thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing the cobalt nitride-nickel gallium liquid alloy composite catalyst described in the above scheme, comprising the following steps:

[0034] (1) mixing nickel salt, gallium salt and water to obtain a mixed solution;

[0035] (2) Soak the cobalt nitride in the mixed solution obtained in the step (1) and then dry it to obtain cobalt nitride loaded with nickel salt and gallium salt;

[0036] (3) Calcining and reducing the cobalt nitride loaded with nickel salt and gallium salt obtained in the step (2) to obtain a cobalt nitride-nickel gallium liquid alloy composite catalyst.

[0037] In the present invention, unless otherwise specified, the raw materials used are conventional commercially available products in this field.

[0038] In the present invention, unless otherwise specified, the operations performed are at room temperature.

[0039] The invention mixes nickel salt, gallium salt and water to obtain a mixed s...

Embodiment 1

[0065] Preparation of nickel salt and gallium salt solution

[0066] Nickel salt solution: weigh 1g of NiCl 2 ·6H 2 O, put into a beaker, add deionized water to dissolve, the addition of said deionized water will make NiCl 2 ·6H 2 O is dissolved, and the above solution is transferred to a 100ml volumetric flask, and deionized water is added to the corresponding scale to prepare a nickel chloride solution with a mass concentration of nickel chloride of 10 mg / mL.

[0067] Gallium salt solution: weigh 1g of GaCl 3 , put into a beaker, add concentrated hydrochloric acid (12mol / Ll) to dissolve, the addition of described concentrated hydrochloric acid will GaCl 3 Just dissolve it, transfer the above solution to a 100ml volumetric flask, add deionized water to the corresponding scale, and prepare a gallium chloride solution with a mass concentration of gallium chloride of 10mg / mL.

[0068] Preparation of Cobalt Nitride-NiGa Liquid Alloy Composite Catalyst

[0069] 1) Pipette 20...

Embodiment 2

[0073] The preparation of the nickel salt and gallium salt solutions and the preparation method of the cobalt nitride-nickel gallium liquid alloy composite catalyst were the same as those in Example 1, except that 12.09 mL of the nickel salt solution and 25.2 mL of the gallium salt solution were pipetted.

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Abstract

The invention provides a cobalt nitride-nickel gallium liquid alloy composite catalyst. The catalyst comprises a carrier cobalt nitride and an active component nickel gallium liquid alloy loaded on the carrier. The selected cobalt nitride has the properties of three substances, namely a covalent compound, an ionic crystal and a transition metal, and can be used as a carrier and an auxiliary catalyst at the same time; the active component nickel gallium exists in the form of liquid alloy and can be well combined with the carrier, so that a uniform active center can be obtained, and the catalytic activity and stability of the catalyst are further improved. When the cobalt nitride-nickel gallium liquid alloy composite catalyst is used for acetylene hydrogenation reaction, the conversion rate of acetylene can reach more than 80% and the selectivity of ethylene can reach more than 70% under the condition of omitting the use of noble metal.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a cobalt nitride-nickel-gallium liquid alloy composite catalyst and a preparation method and application thereof. Background technique [0002] Ethylene is an important product of the petroleum industry, mainly used to produce polyethylene, but the ethylene gas obtained from petroleum cracking contains acetylene with a volume fraction of 0.5-2.3%. In the production of polyethylene, the presence of acetylene not only reduces the activity of the catalyst, but also affects the properties of the polymer. Therefore, industrially, deacetylation is required before preparing polyethylene products. [0003] In the de-alkyne operation, the commonly used methods include selective hydrogenation and partial oxidation steam reforming. Compared with the partial oxidation steam reforming method, the catalytic selective hydrogenation method has less pollution, lower energy consumption and bet...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J37/18C07C5/09C07C11/04
CPCB01J27/24B01J37/088B01J37/18C07C5/09C07C2527/24C07C11/04Y02P20/52
Inventor 陈先朗韩得满李嵘嵘武承林
Owner TAIZHOU UNIV
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