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Catalyst for producing light olefins by fixed bed and preparation method for catalyst for producing light olefins by fixed bed

A technology of low-carbon olefins and catalysts, applied in the field of catalysts and their preparation, can solve the problems of low selectivity of low-carbon olefins and low conversion rate of CO, and improve the selectivity of low-carbon olefins, reduce surface acidity, improve mechanical strength and The effect of thermal stability

Active Publication Date: 2015-03-25
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 a new fixed-bed catalyst for producing low-carbon olefins is provided. 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 light olefins by fixed bed and preparation method for catalyst for producing light olefins by fixed bed
  • Catalyst for producing light olefins by fixed bed and preparation method for catalyst for producing light olefins by fixed bed

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Effect test

Embodiment 1

[0026] Weigh 9.3 grams of kalephine (KAlSiO 4 ) powder and 16.5 g calcium carbonate (CaCO 3) powder and 74.2 grams of α-alumina powder were mixed evenly, and mixed in a ball mill for 2 hours, and an appropriate amount of water was added for kneading and extrusion molding; after drying, sintering at a temperature of 1200 ° C for 2 hours to make a potassium-calcium sintered type The composite carrier is crushed and sieved into 60-80 meshes after cooling to prepare the composite carrier H; 126.5 grams of ferric nitrate nonahydrate, 36.5 grams of zinc nitrate hexahydrate, and 13.3 grams of lanthanum nitrate hexahydrate are dissolved in 35.0 grams of water to make mixed solution I ; Under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated on 60.0 grams of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C, and then roasted, The calcination temperature is 500° C., and the calc...

Embodiment 2

[0029] Weigh 5.0 grams of kalephine (KAlSiO 4 ) powder and 15.0 g calcium carbonate (CaCO 3 ) powder and 80.0 grams of α-alumina powder were mixed evenly, and mixed in a ball mill for 2 hours, and an appropriate amount of water was added for kneading and extrusion molding; after drying, sintering at a temperature of 1100°C for 4 hours to make a potassium-calcium sintered type The composite carrier is crushed and sieved into 60-80 meshes after cooling to prepare the composite carrier H; 126.5 grams of ferric nitrate nonahydrate, 36.5 grams of zinc nitrate hexahydrate, and 13.3 grams of lanthanum nitrate hexahydrate are dissolved in 35.0 grams of water to make mixed solution I ; Under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated on 60.0 grams of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C, and then roasted, The calcination temperature is 500° C., and the calci...

Embodiment 3

[0032] Weigh 40.0 grams of Kalpheline (KAlSiO 4 ) powder and 30.0 g calcium carbonate (CaCO 3 ) powder and 30.0 grams of α-alumina powder were mixed evenly, and mixed in a ball mill for 2 hours, and an appropriate amount of water was added for kneading and extrusion molding; after drying, sintering at a temperature of 1400 ° C for 1 hour to make a potassium-calcium sintered type The composite carrier is crushed and sieved into 60-80 meshes after cooling to prepare the composite carrier H; 126.5 grams of ferric nitrate nonahydrate, 36.5 grams of zinc nitrate hexahydrate, and 13.3 grams of lanthanum nitrate hexahydrate are dissolved in 35.0 grams of water to make mixed solution I ; Under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated on 60.0 grams of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C, and then roasted, The calcination temperature is 500° C., and the ca...

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Abstract

The invention relates to a catalyst for producing light olefins by a fixed bed and a preparation method for the catalyst for producing light olefins by the fixed bed, mainly solving the problems of low CO conversion rate and low selectivity of light olefins during reaction of preparation of light olefins with synthetic gases in the prior art. The catalyst comprises the following components in part by weight: (a) 10-40 parts of iron elements or oxides thereof, (b) 1-10 parts of zinc elements or oxides thereof, (c) 0.5-10 parts of at least one element selected from lanthanum or cerium or oxides thereof, and (d) 30-80 parts composite carriers formed by high-temperature sintering of kaliophilite, calcium carbonate and alpha-aluminum oxide. According to the technical scheme, the catalyst for producing light olefins by the fixed bed and the preparation method can be used for well solving the problems, and can be used for industrial production of light olefins with synthetic gases based on a fixed bed.

Description

technical field [0001] The invention relates to a fixed-bed catalyst for producing light olefins 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 of low-carbon olef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C1/04C07C11/02
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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