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Catalyst for Syngas to Light Olefins

A technology of low-carbon olefins and synthesis gas, applied in molecular sieve catalysts, physical/chemical process catalysts, and hydrocarbon production from carbon oxides, etc., can solve the problems of low CO conversion rate and low selectivity of low-carbon olefins, and achieve good technology effect of effect

Active Publication Date: 2021-06-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem of low conversion rate of CO and low selectivity of low-carbon olefins in the product in the technology of producing low-carbon olefins from syngas in the prior art, and provides a new method of producing low-carbon olefins from syngas Catalyst, which has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins

Method used

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  • Catalyst for Syngas to Light Olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1. Preparation of modified ZSM-5 molecular sieve

[0078] Weigh magnesium nitrate hexahydrate equivalent to 10 grams of MgO, dissolve it in 60 grams of deionized water to make solution E; under the condition of vacuum degree of 80kPa, impregnate the above solution E in 90 grams of ZSM-5 with a silicon-aluminum ratio of 300 The mixture F was obtained on the hydrogen molecular sieve; the mixture F was dried at 110°C, and then calcined at 500°C for 4 hours to obtain the modified ZSM-5 molecular sieve G.

[0079] 2. Preparation of catalyst

[0080] Weigh 35.0 parts by weight of ferric oxide (Fe 2 o 3 ), 15.0 parts by weight of manganese oxide (MnO), 15.0 parts by weight of zirconia (ZrO 2 ), equivalent to 10 parts by weight Na 2 Sodium carbonate of O (Na 2 CO 3 ) four kinds of raw materials and the hydroxypropyl methylcellulose powder that is 4% by weight according to the total amount of the above four kinds of raw materials are ground and mixed in a ball mill for 4 h...

Embodiment 2

[0094] 1. Preparation of modified ZSM-5 molecular sieve

[0095] Weigh magnesium nitrate hexahydrate equivalent to 10 grams of MgO, dissolve it in 60 grams of deionized water to make solution E; under the condition of vacuum degree of 80kPa, impregnate the above solution E in 90 grams of ZSM-5 with a silicon-aluminum ratio of 300 The mixture F was obtained on the hydrogen molecular sieve; the mixture F was dried at 110°C, and then calcined at 500°C for 4 hours to obtain the modified ZSM-5 molecular sieve G.

[0096] 2. Preparation of catalyst

[0097] Weigh 35.0 parts by weight of ferric oxide (Fe 2 o 3 ), 15.0 parts by weight zinc oxide (ZnO), 15.0 parts by weight zirconia (ZrO 2 ), equivalent to 10 parts by weight Na 2 Sodium carbonate of O (Na 2 CO 3 ) four kinds of raw materials and the hydroxypropyl methylcellulose powder that is 4% by weight according to the total amount of the above four kinds of raw materials are ground and mixed in a ball mill for 4 hours to obt...

Embodiment 3

[0111] 1. Preparation of modified ZSM-5 molecular sieve

[0112] Weigh magnesium nitrate hexahydrate equivalent to 10 grams of MgO, dissolve it in 60 grams of deionized water to make solution E; under the condition of vacuum degree of 80kPa, impregnate the above solution E in 90 grams of ZSM-5 with a silicon-aluminum ratio of 300 The mixture F was obtained on the hydrogen molecular sieve; the mixture F was dried at 110°C, and then calcined at 500°C for 4 hours to obtain the modified ZSM-5 molecular sieve G.

[0113] 2. Preparation of catalyst

[0114] Weigh 35.0 parts by weight of ferric oxide (Fe 2 o 3 ), 10.0 parts by weight of manganese oxide (MnO), 5.0 parts by weight of zinc oxide (ZnO), 15.0 parts by weight of zirconia (ZrO 2 ), equivalent to 10 parts by weight Na 2 Sodium carbonate of O (Na 2 CO 3 ) five kinds of raw materials and the hydroxypropyl methylcellulose powder that is 4% by weight according to the total amount of the above five kinds of raw materials ar...

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Abstract

The invention relates to a catalyst for producing low-carbon olefins from synthesis gas, and mainly solves the problems of low CO conversion rate and low selectivity of low-carbon olefins in the reaction of synthesis gas to low-carbon olefins in the prior art. The catalyst for preparing low-carbon olefins from synthesis gas in the present invention comprises the following components in parts by weight: a) 20-50 parts of iron element or its oxide; one element or its oxide; c) 5-30 parts include at least one element selected from group IVB or its oxide; d) 5-15 parts include at least one element selected from group IA or its oxide matter; e) 10-65 parts include a technical solution selected from ZSM-5 type molecular sieves, which solves this problem well and can be used in the industrial production of direct synthesis of low-carbon olefins from synthesis gas.

Description

technical field [0001] The invention relates to a catalyst for producing 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 light hydrocarbons as raw materials will encounter more and more raw material problems, and the production process and raw materials of low-carbon olefins must be diversi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48B01J29/46C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J29/46B01J29/48B01J2229/186C07C1/044C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP