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Catalyst and Application of Fischer-Tropsch Synthesis of Light Olefins

A technology of Fischer-Tropsch synthesis and low-carbon olefins, applied in the direction of carbon compound catalysts, catalysts, molecular sieve catalysts, etc., can solve the problems of low CO conversion rate and low selectivity of low-carbon olefins, and achieve good technical effects

Active Publication Date: 2022-04-05
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 CO conversion rate and low selectivity of low-carbon olefins in the product in the Fischer-Tropsch synthesis technology for preparing low-carbon olefins in the prior art. A new Fischer-Tropsch synthesis is provided to prepare low-carbon A catalyst for olefins, which has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins

Method used

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  • Catalyst and Application of Fischer-Tropsch Synthesis of Light Olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 1. Preparation of modified MCM-41 molecular sieve

[0074] Weigh out the equivalent of 5 grams of Y 2 o 3 Yttrium nitrate hexahydrate was dissolved in 60 grams of deionized water to make solution D; under the condition of a vacuum of 80kPa, the above solution D was impregnated on 95 grams of MCM-41 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 500°C, and the calcination time is 6h, to obtain the modified MCM-41 molecular sieve.

[0075] 2. Preparation of catalyst

[0076] Weigh 25.0 parts by weight of ferric oxide (Fe 2 o 3 ), 15.0 parts by weight of magnesium oxide (MgO), 15.0 parts by weight of molybdenum oxide (MoO 3 ), 25.0 parts by weight of titanium dioxide (TiO 2 ) four kinds of raw materials and the hydroxypropyl methylcellulose powder that is 5% by weight according to the total amount of the above four kinds of raw materials are mixed in a ball mill for 4 hours to obtain material A...

Embodiment 2

[0090]1. Preparation of modified MCM-41 molecular sieve

[0091] Weigh out the equivalent of 5 grams of Y 2 o 3 Yttrium nitrate hexahydrate was dissolved in 60 grams of deionized water to make solution D; under the condition of a vacuum of 80kPa, the above solution D was impregnated on 95 grams of MCM-41 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 500°C, and the calcination time is 6h, to obtain the modified MCM-41 molecular sieve.

[0092] 2. Preparation of catalyst

[0093] Weigh 25.0 parts by weight of ferric oxide (Fe 2 o 3 ), 15.0 parts by weight antimony oxide (Sb 2 o 3 ), 15.0 parts by weight molybdenum oxide (MoO 3 ), 25.0 parts by weight of titanium dioxide (TiO 2 ) four kinds of raw materials and the hydroxypropyl methylcellulose powder that is 5% by weight according to the total amount of the above four kinds of raw materials are mixed in a ball mill for 4 hours to obtain material A...

Embodiment 3

[0107] 1. Preparation of modified MCM-41 molecular sieve

[0108] Weigh out the equivalent of 5 grams of Y 2 o 3 Yttrium nitrate hexahydrate was dissolved in 60 grams of deionized water to make solution D; under the condition of a vacuum of 80kPa, the above solution D was impregnated on 95 grams of MCM-41 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 500°C, and the calcination time is 6h, to obtain the modified MCM-41 molecular sieve.

[0109] 2. Preparation of catalyst

[0110] Weigh 25.0 parts by weight of ferric oxide (Fe 2 o 3 ), 15.0 parts by weight magnesium oxide (MgO), 15.0 parts by weight vanadium oxide (V 2 o 5 ), 25.0 parts by weight of titanium dioxide (TiO 2 ) four kinds of raw materials and the hydroxypropyl methylcellulose powder that is 5% by weight according to the total amount of the above four kinds of raw materials are mixed in a ball mill for 4 hours to obtain material A; Th...

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Abstract

The invention relates to a catalyst for preparing low-carbon olefins by Fischer-Tropsch synthesis and an application thereof, and mainly solves the problems of low CO conversion rate and low selectivity of low-carbon olefins in the reaction for preparing low-carbon olefins by Fischer-Tropsch synthesis in the prior art. The catalyst for preparing low-carbon olefins by Fischer-Tropsch synthesis in the present invention comprises the following components in parts by weight: component a) 5-50 parts; component b) 5-30 parts; component c) 5-30 parts; Component d) 10 to 40 parts; component e) 5 to 50 parts; component a) selected from iron series elements or their oxides; component b) including at least one element selected from the VA group or its oxides Component c) includes at least one element or its oxide selected from VIB group; Component d) is selected from titanium dioxide; Component e) is selected from the technical scheme of MCM-41 type molecular sieve, which preferably solves the problem of This problem can be used in the industrial production of Fischer-Tropsch synthesis of light olefins.

Description

technical field [0001] The invention relates to a catalyst for preparing low-carbon olefins by Fischer-Tropsch synthesis and its application. Background technique [0002] The low-carbon olefin refers to an olefin having 4 or less carbon atoms. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/78C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J29/78C07C1/044B01J2229/18C07C2529/78C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP