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High-temperature sintered sulfur-containing iron-based catalyst and preparation method thereof

An iron-based catalyst, high-temperature sintering technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve low-carbon olefin selectivity and CO conversion rate Low, poor thermal stability and other problems, to achieve the effect of improving selectivity, improving activity, and good thermal stability

Active Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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 low-carbon olefins in the prior art, and the problem of poor strength and poor thermal stability of the catalyst under the conditions of use. , to provide a high-temperature sintered sulfur-containing iron-based catalyst, which has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product when the catalyst is used in the reaction of fixed-bed synthesis of low-carbon olefins

Method used

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  • High-temperature sintered sulfur-containing iron-based catalyst and preparation method thereof
  • High-temperature sintered sulfur-containing iron-based catalyst and preparation method thereof
  • High-temperature sintered sulfur-containing iron-based catalyst and preparation method thereof

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Effect test

Embodiment 1

[0028] Weigh 30.0 grams of ferric oxide (Fe 3 o 4 ), 8.0 grams of ruthenium dioxide (RuO 2 ), 20.0 grams of calcium oxide (CaO), 16.0 grams of vanadium pentoxide (V 2 o 5 ), 26.0 grams of α-alumina (α-Al 2 o 3 ) and trace CaSO 4 And according to the total amount of raw materials, 4 grams of methyl cellulose with a percentage by weight of 4%, were ground and mixed for 4 hours in a ball mill; kneading 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. Dry at ℃ for 12 hours for later use; put the dried precursor into a high-temperature furnace, calcinate at 1300℃ for 6.0 hours, and after cooling, crush and sieve into 20-40 meshes to obtain the required high-temperature sintered sulfur-containing iron-based catalyst. The obtained iron-based catalyst comprises the following components in weight percent: 30% Fe 3 o 4 , 8% ...

Embodiment 2

[0030] Weigh 52.0 grams of ferric oxide (Fe 3 o 4 ), 0.5 g ruthenium dioxide (RuO 2 ), 9.0 grams of calcium oxide (CaO), 9.0 grams of vanadium pentoxide (V 2 o 5 ), 29.5 grams of α-alumina (α-Al 2 o 3 ) and trace CaSO 4 And according to the total amount of raw materials, 4 grams of methyl cellulose with a percentage by weight of 4% were ground and mixed for 6 hours in a ball mill; kneading 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. Dry at ℃ for 12 hours for later use; send the dried precursor into a high-temperature furnace, calcinate at 1000℃ for 6.0 hours, and after cooling, crush and sieve into 20-40 meshes to obtain the required high-temperature sintered sulfur-containing iron-based catalyst. The obtained iron-based catalyst comprises the following components in weight percent: 52% Fe 3 o 4 , 0.5% RuO 2 ...

Embodiment 3

[0032] Weigh 10.0 grams of ferric oxide (Fe 3 o 4 ), 16.0 grams of ruthenium dioxide (RuO 2 ), 25.0 grams of calcium oxide (CaO), 32.0 grams of vanadium pentoxide (V 2 o 5 ), 17.0 grams of α-alumina (α-Al 2 o 3 ) and trace CaSO 4 And according to the total amount of raw materials, 4 grams of methyl cellulose with a percentage by weight of 4%, were ground and mixed for 2 hours in a ball mill; kneading 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. Dry at ℃ for 12 hours for later use; put the dried precursor into a high-temperature furnace, calcinate at 1300℃ for 6.0 hours, and after cooling, crush and sieve into 20-40 meshes to obtain the required high-temperature sintered sulfur-containing iron-based catalyst. The obtained iron-based catalyst comprises the following components in weight percent: 10% Fe 3 o 4 , 16...

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Abstract

The present invention relates to a high-temperature sintering type sulfur-containing iron-based catalyst and a preparation method thereof. A purpose of the present invention is to mainly solve the problems of low CO conversion rate and low low-carbon olefin selectivity in the low-carbon olefin preparation reaction with synthesis gas, and poor strength and poor thermal stability of the catalyst under the use condition in the prior art. The catalyst comprises, by weight, a) 5-50 parts of iron or an oxide thereof; b) 1-15 parts of ruthenium or an oxide thereof; c) 10-30 parts of calcium or an oxide thereof; d) 10-30 parts of at least one element selected from vanadium and chromium, or an oxide thereof; e) 10-75 parts of aluminum or an oxide thereof; and f) added trace amount calcium sulfate, wherein the catalyst contains 20-200 ppm sulfur based on the total weight of the iron-based catalyst. With the technical scheme, the problems in the prior art are well solved. The catalyst of the present invention can be used for the low-carbon olefin preparation with synthesis gas in industrial production.

Description

technical field [0001] The invention relates to a high-temperature sintered sulfur-containing iron-based catalyst 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 and raw materials o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C07C1/04C07C11/04C07C11/06C07C11/08C07C11/02C07C9/04C10G2/00
CPCY02P20/52
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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