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Catalyst for producing low-carbon olefins from high-temperature sintered syngas and preparation method thereof

A technology of high-temperature sintering and low-carbon olefins, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low selectivity of low-carbon olefins and low conversion rate of CO, and achieve the goal of improving CO High conversion rate, improved reactivity, and good thermal stability

Active Publication Date: 2017-06-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem 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 process of producing low-carbon olefins in the prior art. Olefin catalyst, when the catalyst is used in Fischer-Tropsch synthesis of low-carbon olefins, it has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product

Method used

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  • Catalyst for producing low-carbon olefins from high-temperature sintered syngas and preparation method thereof
  • Catalyst for producing low-carbon olefins from high-temperature sintered syngas and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Weigh 19.0 grams of magnetite (Fe 3 o 4 ), 8.0 grams of titanium oxide (TiO 2 ), 2.5 grams of magnesium oxide (MgO), 0.9 grams of potassium carbonate (K 2 CO 3 ) and 70.0 g of α-alumina (α-Al 2 o 3 ) Five kinds of raw materials and 3 grams of carbon black powder with a weight percentage of 3% by weight of the total amount of raw materials were milled and mixed for 2 hours in a ball mill; The kneaded material is kneaded until soft; the kneaded material is sent into the extruder, made into a strip with a diameter of 5mm, and cut into a column with a length of 20mm. After natural drying, it is sent to the drying equipment , dried at 120°C for 8 hours for later use; the dried precursor was sent into a high-temperature furnace, calcined at 1400°C for 6.0 hours, and after cooling, it was crushed and sieved into 60-80 meshes to obtain the desired high-temperature sintered catalyst. The prepared catalyst comprises the following components in weight percent: 19% Fe 3 o 4...

Embodiment 2

[0028] Weigh 19.0 grams of magnetite (Fe 3 o 4 ), 8.0 grams of titanium oxide (TiO 2 ), 2.5 grams of magnesium oxide (MgO), 0.9 grams of potassium carbonate (K 2 CO 3 ), 0.1 g rhenium dioxide (ReO 2 ) and 69.9 g of α-alumina (α-Al 2 o 3 ) Six kinds of raw materials and 3 grams of carbon black powder with a weight percentage of 3% by weight of the total amount of raw materials were mixed in a ball mill for 2 hours; The kneaded material is kneaded until soft; the kneaded material is sent into the extruder, made into a strip with a diameter of 5mm, and cut into a column with a length of 20mm. After natural drying, it is sent to the drying equipment , dried at 120°C for 8 hours for later use; the dried precursor was sent into a high-temperature furnace, calcined at 1400°C for 6.0 hours, and after cooling, it was crushed and sieved into 60-80 meshes to obtain the desired high-temperature sintered catalyst. The prepared catalyst comprises the following components in weight pe...

Embodiment 3

[0030] Weigh 19.0 grams of magnetite (Fe 3 o 4 ), 8.0 grams of titanium oxide (TiO 2 ), 2.5 grams of magnesium oxide (MgO), 0.9 grams of potassium carbonate (K 2 CO 3 ), 1.0 g rhenium dioxide (ReO 2 ) and 70.0 g of α-alumina (α-Al 2 o 3 ) Six kinds of raw materials and 3 grams of carbon black powder with a weight percentage of 3% by weight of the total amount of raw materials were mixed in a ball mill for 2 hours; The kneaded material is kneaded until soft; the kneaded material is sent into the extruder, made into a strip with a diameter of 5mm, and cut into a column with a length of 20mm. After natural drying, it is sent to the drying equipment , dried at 120°C for 8 hours for later use; the dried precursor was sent into a high-temperature furnace, calcined at 1400°C for 6.0 hours, and after cooling, it was crushed and sieved into 60-80 meshes to obtain the desired high-temperature sintered catalyst. The prepared catalyst comprises the following components in weight pe...

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Abstract

The invention relates to a high-temperature sintering type catalyst for preparing light olefins from synthetic gas and a preparation method thereof. According to the invention, the problem that CO conversion rate is low and selectivity of light olefins is low during a reaction of preparing light olefins from synthetic gas in the prior art is mainly solved. The catalyst provided by the invention contains the following components, by weight, a) 10-40 parts of iron or its oxide, b) 0.5-10 parts of at least one element selected from titanium and chromium or an oxide thereof; c) 1-10 parts of at least one element selected from magnesium and calcium or an oxide thereof; d) 0.5-10 parts of potassium or its oxide; and e) 30-88 parts of a carrier alpha-aluminium oxide. By the technical scheme, the above problem is solved well. The catalyst can be used in industrial production of Fischer-Tropsch synthesis for preparation of light olefins.

Description

technical field [0001] The invention relates to a high-temperature sintering catalyst for producing low-carbon olefins from syngas and a preparation method thereof. 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 an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/86B01J23/889B01J23/78B01J35/10B01J37/08C07C1/04C07C11/04C07C11/06C07C11/08
CPCY02P20/52
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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