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Bifunctional catalyst containing SAPO-17 molecular sieve and application of bifunctional catalyst in reaction for preparing low-carbon olefin from synthesis gas

A SAPO-17, catalyst technology, applied in the application field of dual-function catalyst and synthesis gas direct low-carbon olefin reaction, can solve the problem of low selectivity of ethylene and propylene, achieve high selectivity, improved activation conversion, unique The effect of the selection effect

Active Publication Date: 2021-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Bifunctional catalyst containing SAPO-17 molecular sieve and application of bifunctional catalyst in reaction for preparing low-carbon olefin from synthesis gas
  • Bifunctional catalyst containing SAPO-17 molecular sieve and application of bifunctional catalyst in reaction for preparing low-carbon olefin from synthesis gas
  • Bifunctional catalyst containing SAPO-17 molecular sieve and application of bifunctional catalyst in reaction for preparing low-carbon olefin from synthesis gas

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preparation example Construction

[0033] 1. Preparation of Catalyst Component I

[0034] (1) Synthesis of ZnO materials with high specific surface area by precipitation method:

[0035] (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;

[0036] (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 bifunctional catalyst containing an SAPO-17 molecular sieve and application of the bifunctional catalyst in a reaction for preparing low-carbon olefin from synthesis gas. According to the invention, the synthesis gas is used as a reaction raw material; a conversion reaction is carried out on a fixed bed or a moving bed; and the catalyst is a composite catalyst and is formed by compounding a component I and a component II together in a mechanical mixing mode, the active ingredient of the component I is a metal oxide with a high specific surface area, the component II is an SAPO-17 molecular sieve, and a weight ratio of the active ingredient in the component I to the component II is 0.1-20. According to the invention, a reaction process has very high product yield and selectivity, the selectivity of low-carbon olefin can reach 65-85%, the selectivity of ethylene and propylene can reach 60-80%, a ratio of ethylene to propylene is 0.8-1.3, and the selectivity of the byproduct methane is low (smaller than 12%), and the method has good application prospects.

Description

technical field [0001] The invention belongs to the preparation of low-carbon olefins from synthesis gas, and in particular relates to a dual-function catalyst containing SAPO-17 molecular sieve and its application in the direct production of low-carbon olefins from synthesis gas 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 l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J23/08B01J23/10B01J23/26B01J23/34B01J29/85C07C1/04C07C11/04C07C11/06
CPCB01J29/85B01J23/06B01J23/34B01J23/10B01J23/08B01J23/26C07C1/043C07C1/0445C07C11/04C07C11/06Y02P20/52
Inventor 包信和丁一焦峰潘秀莲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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