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Method for directly producing low-carbon olefins from synthesis gas

A low-carbon olefin and synthesis gas technology, applied in chemical instruments and methods, from carbon oxides to hydrocarbons, hydrocarbons, 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: 2021-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem 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 synthesis gas in the prior art, and provides a method for directly preparing low-carbon olefins from synthesis gas. The method uses It has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product when it is used in the reaction of syngas to low-carbon olefins

Method used

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  • Method for directly producing low-carbon olefins from synthesis gas

Examples

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Comparison scheme
Effect test

Embodiment 1

[0067] 1. Preparation of modified SBA-15 molecular sieve

[0068] Weigh equivalent to 8 grams of Nd 2 o 3 Neodymium nitrate hexahydrate was dissolved in 50 grams of deionized water to make solution D; under the condition of vacuum degree of 80kPa, the above solution D was impregnated on 92 grams of SBA-15 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 550°C, and the calcination time is 4h, to obtain the modified SBA-15 molecular sieve.

[0069] 2. Preparation of catalyst

[0070] Weigh equivalent to 25 parts by weight Fe 2 o 3 Iron nitrate nonahydrate, zinc nitrate hexahydrate equivalent to 10 parts by weight of ZnO, equivalent to 10 parts by weight of ZrO 2 Zirconium nitrate pentahydrate was dissolved in 20.0 grams of deionized water to make solution A; under the condition of a vacuum of 80kPa, the above solution A was impregnated on 25.0 grams of silica carrier to obtain mixture B; the impregnated...

Embodiment 2

[0084] 1. Preparation of modified SBA-15 molecular sieve

[0085] Weigh equivalent to 8 grams of Nd 2 o 3 Neodymium nitrate hexahydrate was dissolved in 50 grams of deionized water to make solution D; under the condition of vacuum degree of 80kPa, the above solution D was impregnated on 92 grams of SBA-15 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 550°C, and the calcination time is 4h, to obtain the modified SBA-15 molecular sieve.

[0086] 2. Preparation of catalyst

[0087] Weigh equivalent to 25 parts by weight Fe 2 o 3 Iron nitrate nonahydrate, magnesium nitrate hexahydrate equivalent to 10 parts by weight of MgO, equivalent to 10 parts by weight of ZrO 2 Zirconium nitrate pentahydrate was dissolved in 20.0 grams of deionized water to make solution A; under the condition of a vacuum of 80kPa, the above solution A was impregnated on 25.0 grams of silica carrier to obtain mixture B; the impreg...

Embodiment 3

[0101] 1. Preparation of modified SBA-15 molecular sieve

[0102] Weigh equivalent to 8 grams of Nd 2 o 3 Neodymium nitrate hexahydrate was dissolved in 50 grams of deionized water to make solution D; under the condition of vacuum degree of 80kPa, the above solution D was impregnated on 92 grams of SBA-15 molecular sieves to obtain mixture E; Drying under low temperature, and then calcination, the calcination temperature is 550°C, and the calcination time is 4h, to obtain the modified SBA-15 molecular sieve.

[0103] 2. Preparation of catalyst

[0104] Weigh equivalent to 25 parts by weight Fe 2 o 3 Iron nitrate nonahydrate, zinc nitrate hexahydrate equivalent to 6 parts by weight of ZnO, magnesium nitrate hexahydrate equivalent to 4 parts by weight of MgO, equivalent to 10 parts by weight of ZrO 2 Zirconium nitrate pentahydrate was dissolved in 20.0 grams of deionized water to make solution A; under the condition of a vacuum of 80kPa, the above solution A was impregnated...

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Abstract

The invention relates to a method for directly preparing 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 light olefins in the prior art. The method of the present invention adopts syngas to directly prepare low-carbon olefins, comprising using syngas as a raw material, and the raw material is contacted and reacted with a catalyst to generate carbon-containing olefins 2 ~C 4 olefins, the catalyst includes the following components in parts by weight: a) 5 to 40 parts of iron series elements or their oxides; b) 1 to 20 parts including at least one element in Group IIB or their oxides; c) 1 to 20 parts include at least one element or oxide thereof in group IVB; d) 10 to 40 parts of silicon dioxide; e) 10 to 50 parts of the technical scheme of SBA-15 type molecular sieve, which better solves the problem This problem can be used in the industrial production of low-carbon olefins from syngas.

Description

technical field [0001] The invention relates to a method for directly preparing 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/04B01J29/03C07C11/04C07C11/06C07C11/08
CPCB01J29/0333B01J29/0341B01J2229/20C07C1/044C07C2529/03C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 李剑锋陶跃武宋卫林庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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