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A catalyst and direct conversion of synthesis gas to produce c 2 and c 3 olefin method

A catalyst and synthesis gas technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problem of low selectivity between ethylene and propylene, and achieve high selectivity, high product yield and selectivity, The effect of activation conversion improvement

Active Publication Date: 2022-04-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of the above problems, the present invention solves the problem of low selectivity of ethylene and propylene in the process of direct conversion of synthesis gas to light olefins, and provides a catalyst and direct conversion of synthesis gas to produce C 2 、C 3 olefin method

Method used

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  • A catalyst and direct conversion of synthesis gas to produce c <sub>2</sub> and c <sub>3</sub> olefin method
  • A catalyst and direct conversion of synthesis gas to produce c <sub>2</sub> and c <sub>3</sub> olefin method
  • A catalyst and direct conversion of synthesis gas to produce c <sub>2</sub> and c <sub>3</sub> olefin method

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preparation example Construction

[0032] 1. Preparation of Catalyst Component I

[0033] (1) Synthesis of ZnO materials with high specific surface area by precipitation method:

[0034] (1) Weigh 3 parts, 0.446g (1.5mmol) Zn(NO 3 ) 2 ·6H 2 O in 3 containers, then weigh 0.300g (7.5mmol), 0.480g (12mmol), 0.720g (18mmol) NaOH and add them to the above 3 containers in turn, then add 30ml of deionized water to each of the 3 containers In the container, stir at 70°C for more than 0.5h to make the solution evenly mixed, and cool naturally to room temperature. The reaction solution was centrifuged to collect the precipitate after centrifugation, and washed twice with deionized water to obtain the ZnO metal oxide precursor;

[0035] (2) Roasting: After the above-mentioned obtained product is dried in the air, it is calcined in the atmosphere to obtain a ZnO material with a high specific surface area. The atmosphere is inert gas, reducing gas or oxidizing gas; the inert gas is N 2 One or more of , He and Ar; the ...

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Abstract

The invention provides a catalyst and the direct conversion of synthesis gas to produce C 2 , C 3 The method of olefins, which uses synthesis gas as the reaction raw material, and performs conversion reaction on a fixed bed or a moving bed. The catalyst is a composite catalyst, which is composed of component I and component II in a mechanically mixed manner. The activity of component I The components are metal oxides, and the component II is a molecular sieve with an LEV structure; the weight ratio between the active component in the component I and the component II is 0.1-20. The reaction process has high product yield and selectivity, C 2 , C 3 The selectivity of olefins can reach 60-75%, the ratio of ethylene to propylene is between 0.8-1.3, and the selectivity of by-product methane is low (<15%), which has a good application prospect.

Description

technical field [0001] The invention belongs to the preparation of low-carbon olefins from synthesis gas, in particular to a catalyst and direct conversion of synthesis gas to produce C 2 、C 3 Alkenes method. Background technique [0002] Low-carbon olefins refer to olefins with carbon atoms less than or equal to 4. Low-carbon olefins represented by ethylene and propylene are very important basic organic chemical raw materials. With the rapid growth of my country's economy, the supply of low-carbon olefins has been in short supply for a long time. At present, the production of low-carbon olefins mainly adopts the petrochemical route of cracking light hydrocarbons (ethane, naphtha, light diesel oil). Due to the increasing shortage of global oil resources and the long-term high price of crude oil, the development of low-carbon olefins industry only relies on oil The tubular cracking furnace process with light hydrocarbons as raw materials will encounter more and more raw ma...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/83B01J29/84B01J29/85B01J23/06B01J23/08B01J23/10B01J23/26B01J23/34B01J37/04C07C1/04C07C11/04C07C11/06
CPCB01J37/04B01J35/0006B01J23/06B01J23/34B01J23/10B01J23/08B01J23/26B01J29/83B01J29/85B01J29/84C07C1/043C07C1/0445C07C11/04C07C11/06Y02P20/52
Inventor 焦峰丁一潘秀莲包信和
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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