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Alumina composite material, preparation method and application thereof, and synthesis method of n-valeronitrile

The technology of a composite material and a synthesis method is applied in the fields of the synthesis of n-valeronitrile, alumina composite material and preparation thereof, and can solve the problems of large catalyst loss, increased production cost, low semi-melting temperature, etc., and achieves easy separation and safe production. , Environmentally friendly effect

Active Publication Date: 2020-04-21
昌德新材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Cu in the Cu / SiO2 type supported catalyst has a low half-melting temperature and is easy to coalesce during the reaction process; and there are ammonia and water in the reaction process, Cu will form complexes with ammonia and water to The loss is serious, resulting in a large loss of catalyst, which increases the production cost

Method used

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Examples

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preparation example Construction

[0037] One embodiment of the present invention also provides a method for preparing any of the above-mentioned alumina composite materials, including the following steps S1-S3:

[0038] Step S1, dissolving transition metal salts and nitrogen-containing organic carbon sources in water and mixing them, removing the solvent, and roasting in a protective gas atmosphere to obtain supported carbon materials; supported carbon materials include nitrogen-doped carbon materials and nitrogen-doped carbon materials transition metal oxides on materials.

[0039] In some embodiments, the transition metal salt is a soluble salt of at least one transition metal selected from Zn, Cr, Ni, Fe, Co, Cu and Mn, such as the corresponding nitrate.

[0040] In some of these embodiments, the nitrogen-containing organic carbon source is chitosan. In this way, the nitrogen-containing organic carbon originates from a protective gas atmosphere and is calcined to form a nitrogen-doped carbon material.

[...

Embodiment 1

[0063] The preparation method of alumina composite material 1 is as follows:

[0064] 29.75g Zn(NO 3 ) 2 ·6H 2 Dissolve O in 200mL of deionized water, add 50g of chitosan, then heat to 80°C, stir and react for 5h, evaporate the water under reduced pressure at 80°C after the reaction, and finally roast at 800°C for 2h in an argon atmosphere to obtain nitrogen Doped with carbon-supported zinc oxide. Then add 100g γ-Al 2 o 3 , add an appropriate amount of deionized water and grind until completely mixed evenly, use an extruder to prepare a strip-shaped catalyst precursor with a diameter of 2mm-3mm, dry it in a drying oven at 110°C for 10h, and finally roast it at 550°C for 5h under a nitrogen atmosphere. Obtain alumina composite material 1; Be catalyst ZnNC-Al 2 o 3 , where the catalyst ZnNC-Al 2 o 3 The mass percent content of the dehydrogenation active component ZnO is 6.1%.

Embodiment 2～7

[0066] The preparation method of alumina composite materials 2-7 is basically the same as that of Example 1, except that the Zn(NO 3 ) 2 ·6H 2 O is replaced by the corresponding transition metal nitrate (nickel nitrate, iron nitrate, chromium nitrate, cobalt nitrate, copper nitrate, manganese nitrate). The prepared alumina composite materials 2-7 are shown in Table 1 below.

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Abstract

The invention relates to an alumina composite material, a preparation method and an application thereof, and a synthesis method of n-valeronitrile. The alumina composite material is mainly formed by compounding alumina and a supported carbon material, and the supported carbon material comprises a nitrogen-doped carbon material and a transition metal oxide supported on the nitrogen-doped carbon material. In the alumina composite material, the transition metal oxide is used as a dehydrogenation active component, and the alumina is used as an ammoniation active component. The transition metal oxide is loaded on the nitrogen-doped carbon material and forms the compound together with the alumina, so that the transition metal and the alumina which are used as catalytic active components have good catalytic performance and stability, thereby when used for catalyzing a reaction of synthesizing nitrile by ammoniation and dehydrogenation of alcohol, and the composite material has high conversionrate, selectivity and stability.

Description

technical field [0001] The invention relates to the technical field of synthesis, in particular to an alumina composite material, its preparation method, application and a synthesis method of n-valeronitrile. Background technique [0002] N-valeronitrile, also known as valeronitrile, n-butyl cyanide, n-valeronitrile, butyl cyanide or butane cyanide, is a colorless liquid at room temperature, miscible with ethanol and ether, but insoluble in water. N-valeronitrile is mainly used to synthesize the intermediate of losartan, a sartan drug for the treatment of hypertension, 2-butyl-5-chloro-1H-imidazole-4-carbaldehyde. [0003] The traditional industrial synthesis of n-valeronitrile includes sodium cyanide method and pentenenitrile hydrogenation method. [0004] Wherein, the reaction equation of sodium cyanide process technology is as follows: [0005] CH 3 -CH 2 -CH 2 -CH 2 Cl+NaCN→CH 3 -CH 2 -CH 2 -CH 2 -CN+NaCl. [0006] This method needs to use highly toxic sodium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C253/00C07C255/03
CPCB01J27/24C07C253/00C07C255/03
Inventor 罗小沅张月成周成强张智蒋卫和
Owner 昌德新材科技股份有限公司
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