Method for producing low-carbon olefins by using fixed bed

A low-carbon olefin and fixed-bed technology, which is applied in ethylene production, bulk chemical production, chemical instruments and methods, etc., can solve the problems of low selectivity of low-carbon olefins and low conversion rate of CO, and improve the selection of low-carbon olefins performance, increase the conversion rate of CO, and the effect of improving the conversion rate

Active Publication Date: 2017-05-03
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 fixed-bed production of low-carbon olefins technology in the prior art, and a new method for fixed-bed production of low-carbon olefins is provided. The method uses a new type of fixed-bed low-carbon olefin iron-based catalyst, which 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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  • Method for producing low-carbon olefins by using fixed bed
  • Method for producing low-carbon olefins by using fixed bed
  • Method for producing low-carbon olefins by using fixed bed

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 60.0 grams of nano-titanium dioxide (TiO 2 ) powder and 40.0 grams of nano silicon dioxide (SiO 2 ) powders were mixed evenly, and mixed in a ball mill for 3 hours to make a mixture G for use; adding deionized water to the above-mentioned mixed material G for kneading and extrusion molding; after drying, the temperature of 800 ° C Lower roasting 3 hours, after cooling, crush and sieve into 20~40 orders to prepare composite carrier H; With 101.2 grams of ferric nitrate nonahydrate, 6.8 grams of rhodium nitrate, 45.6 grams of copper nitrate trihydrate, 32.2 grams of potassium nitrate, 4.0 grams of nitric acid hexahydrate Praseodymium is dissolved in 40.0 grams of deionized water to make a mixed solution I; under the condition of a vacuum of 80kPa, the above mixed solution I is impregnated in 45.0 grams of the prepared composite carrier H to obtain a catalyst precursor J; the impregnated catalyst Precursor J was dried at 110° C., and then calcined at 600° C. for 4 h...

Embodiment 2

[0030] Weigh 70.0 grams of nano-titanium dioxide (TiO 2 ) powder and 30.0 grams of nano silicon dioxide (SiO 2 ) powders were mixed evenly, and mixed in a ball mill for 3 hours to make mixture G for use; adding deionized water to the above-mentioned mixed mixture G, kneading and extruding; Down roasting 6 hours, after cooling, broken and sieved into 20~40 orders and prepared composite carrier H; 253.0 grams of iron nitrate nonahydrate, 2.3 grams of rhodium nitrate, 27.3 grams of copper nitrate trihydrate, 19.3 grams of potassium nitrate, 2.0 grams of nitric acid hexahydrate Praseodymium is dissolved in 40.0 grams of deionized water to make mixed solution I; under the condition of a vacuum of 80kPa, the above mixed solution I is impregnated in 30.0 grams of prepared composite carrier H to obtain catalyst precursor J; the impregnated catalyst Precursor J is dried at 110° C., and then calcined at 600° C. for 4 hours to obtain the desired fixed-bed iron-based catalyst for produci...

Embodiment 3

[0032] Weigh 20.0 grams of nano-titanium dioxide (TiO 2 ) powder and 80.0 grams of nano silicon dioxide (SiO 2 ) powders were mixed evenly, and mixed in a ball mill for 3 hours to make a mixture G for use; adding deionized water to the above-mentioned mixed material G for kneading and extrusion molding; Lower roasting 1 hour, after cooling, crush and sieve into 20~40 orders to prepare composite carrier H; 50.6 grams of iron nitrate nonahydrate, 2.3 grams of rhodium nitrate, 27.3 grams of copper nitrate trihydrate, 19.3 grams of potassium nitrate, 2.0 grams of nitric acid hexahydrate Praseodymium is dissolved in 50.0 grams of deionized water to make a mixed solution I; under the condition of a vacuum of 80kPa, the above mixed solution I is impregnated in 70.0 grams of the prepared composite carrier H to obtain a catalyst precursor J; the impregnated catalyst Precursor J is dried at 110° C., and then calcined at 600° C. for 4 hours to obtain the desired fixed-bed iron-based cat...

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Abstract

The invention relates to a method for producing low-carbon olefins by using a fixed bed. The method mainly solves the problems of a low conversion rate of CO and low selectivity of the low-carbon olefins in the reaction process of producing the low-carbon olefins from synthesis gas by using the fixed bed in the prior art. According to the technical scheme, a catalyst adopted by the method comprises the following components, by weight percentage, a) 10-50% of Fe or an oxide thereof, b) 1-5% of Rh or an oxide thereof, c) 9-30% of at least one element selected from Cu and Zn or at least one oxide thereof, d) 9-30% of at least one element selected from K and Cs or at least one oxide thereof, e) 1-5% of Pr or an oxide thereof, and f) 30-70% of a carrier which comprises the following components, based on the weight of the carrier, (1) 20-70 parts of titanium oxide, and (2) 30-80 parts of silicon dioxide. The problems can be well solved through the above technical scheme, and the method can be applied to industrial production of preparing the low-carbon olefins from the synthesis gas by using the fixed bed.

Description

technical field [0001] The invention relates to a method for producing light olefins in a fixed bed. 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 diversified. One-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C1/20C07C11/04C07C11/06C07C11/08C07C11/02
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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