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Non-supported catalyst and preparation method and application thereof

A catalyst and carrier-free technology, which is applied in the preparation of heterocyclic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds, etc., can solve the problems of limiting the effect of additives, achieve the effects of improving catalytic reaction performance, low product cost, and promoting reduction

Active Publication Date: 2016-03-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes a considerable part of the additives covered by active metal components, and the additives cannot contact the reactants to play a role in the surface catalytic contact reaction, which greatly limits the effect of the additives.

Method used

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  • Non-supported catalyst and preparation method and application thereof
  • Non-supported catalyst and preparation method and application thereof
  • Non-supported catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A preparation method for an iron-based inversion catalyst that can be used for Fischer-Tropsch synthesis, comprising the steps of:

[0072] 1. Preparation of active metal oxide nanoparticles:

[0073] Weigh 1.95g of ferric chloride and 0.2g of trisodium citrate, add 40ml of ethylene glycol after mixing, and stir for 0.5h to obtain solution A;

[0074] Weigh 4g of sodium acetate and dissolve it in 40ml of glycerol, stir for 0.5h to obtain solution B;

[0075] Slowly add solution B to solution A, and keep stirring for 3h;

[0076] Move the above solution into a polytetrafluoroethylene container, seal it in a stainless steel autoclave, heat and react at 150°C for 10 hours, and then cool it to room temperature; after centrifuging the above product, wash it with ethanol three times, and then heat it at 60°C Drying for 10 h under the hood to obtain ferric oxide microspheres with a diameter of about 250 nm.

[0077] figure 1 It is the SEM image of the ferric oxide microsph...

Embodiment 2

[0089] Same as Example 1, the difference is:

[0090] 2. In the preparation of the catalyst:

[0091] 1) The drying temperature is 60°C, and the temperature is constant for 12 hours;

[0092] 2) The drying temperature is 60°C, and the temperature is constant for 24 hours.

[0093] The catalyst obtained is identical to the application of Example 1, and the reaction results are shown in Table 1.

Embodiment 3

[0095] Same as Example 1, the difference is:

[0096] 2. In the preparation of the catalyst:

[0097] 1) The drying temperature is 180°C, and the temperature is constant for 24 hours;

[0098] 2) The drying temperature is 180°C, and the temperature is kept constant for 48 hours.

[0099] The application method of the obtained catalyst is the same as in Example 1, and the reaction results are shown in Table 1.

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Abstract

The present invention discloses a non-supported catalyst comprising: an active metal oxide and an additive embedded in the outer surface of the active metal oxide; the active metal oxide is selected from one oxide or more oxides of iron, cobalt, nickel and copper; the additive is selected from one or more elements of iron, cobalt, nickel, copper, rhodium, manganese, potassium, silver, calcium, magnesium, zirconium, aluminum, zinc, ruthenium, platinum, sodium and phosphorus, and is in the form of an element or an oxide; the catalyst achieves the effective coordination of the supported additive and the active metal oxide, the additive can act directly on the surface of active ingredients, the promoting effect of the additive can be significantly enhanced, reducing of the active ingredients can be effectively promoted, reactivity is improved, and the catalytic properties of the catalyst can be improved. The present invention also discloses a preparation method of the non-supported catalyst.

Description

technical field [0001] The present invention relates to the field of catalysts. More specifically, it relates to an unsupported catalyst and its preparation method and application. Background technique [0002] The catalytic conversion of CO hydrogenation to liquid fuels or chemicals is the core process for the indirect conversion and utilization of non-oil-based carbon resources such as coal, coalbed methane, shale gas and biomass. Because the products of CO hydroconversion reaction are complex and diverse, the control of its selectivity is extremely important. Taking the Fischer-Tropsch synthesis reaction of CO hydrogenation to hydrocarbons as an example, its products obey the Anderson-Schulz-Flory (ASF) distribution on traditional catalysts. The distribution is wide and the product selectivity is poor. The development of new Fischer-Tropsch catalysts with adjustable product selectivity is a major challenge in this direction. [0003] Taking coal-based natural gas as an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/89B01J27/185C10G2/00C07C9/04C07C1/04C07C31/04C07C29/154C07C47/19C07C45/58C07C31/20C07C29/141B82Y30/00
CPCB01J23/70Y02P20/52
Inventor 张燚刘意陈建峰
Owner BEIJING UNIV OF CHEM TECH
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