Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application of catalyst

A low-carbon olefin and catalyst technology, applied in the field of synthesis gas to low-carbon olefin catalyst, can solve the problems of low activity and selectivity at low temperature, and achieve the effects of promoting dispersion, strengthening adsorption activation, and avoiding carbon deposition

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems solved by the present invention is the problem of low activity and selectivity of synthesis gas to low-carbon olefins (C2-C4 olefins) catalysts in the prior art at low temperatures. A catalyst for synthesis gas to low-carbon olefins is provided. It is used in the production of low-carbon olefins from syngas, and has good low-temperature activity and low-carbon olefin selectivity

Method used

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  • Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 118.27 grams of ferric nitrate, 0.17 grams of potassium nitrate and 12.25 grams of copper nitrate in 100 milliliters of water to form solution Ⅰ of a certain concentration, dissolve 47.7 grams of ammonium heptamolybdate in 100 milliliters of water to obtain solution Ⅱ, and add solution Ⅱ to solution Ⅰ To obtain mixture I, add 120 grams of aluminum sol with an alumina content of 25% by weight to mixture I and adjust the pH value to 8 with ammonia water to obtain mixture II, heat and concentrate mixture II in a boiling water bath to a solid content of 55% by weight to obtain a slurry material, the slurry was dried at 80°C with hot air with a relative humidity of 90% for 12 hours to obtain a catalyst precursor, and the catalyst precursor was roasted at 750°C for 3 hours to obtain a catalyst, the composition of which was: 70% Fe 100 Mo 80 Cu 8 K 0.5 Ox+30%Al 2 o 3 . The catalyst is pulverized and screened with 20-40 mesh particles for use.

[0036]

Embodiment 2

[0038] Take 118.3 grams of ferric nitrate, 17.1 grams of zinc nitrate solution, 9.83 grams of nickel nitrate and 1.03 grams of potassium nitrate dissolved in 100 ml of water to make a certain concentration of solution I, 52.6 grams of chromium nitrate and 0.15 grams of ammonium tellurate dissolved in 100 ml of water To obtain solution II, add solution II to solution I to obtain mixture I, add 125 grams of silica sol with a mass content of silicon oxide of 40% to mixture I and adjust the pH value to 9 with ammonia water to obtain mixture II, and place mixture II in a boiling water bath Heat and concentrate to a solid content of 55% by weight to obtain a slurry, dry the slurry at 90° C. with hot air with a relative humidity of 90% for 5 hours to obtain a catalyst precursor, and roast the catalyst precursor at 650° C. for 5 hours to obtain a catalyst. Composition: 50%Fe 100 Ni 10 Cr 45 Zn 17 K 3 Te 0.2 Ox+50%SiO2 2 . The catalyst is pulverized and screened with 20-40 mesh ...

Embodiment 3

[0041] Get 54.2 grams of ferric nitrate, 0.17 grams of potassium nitrate and 5.61 grams of copper nitrate dissolved in 100 milliliters of water to make a certain concentration of solution I, 0.17 grams of ammonium selenate and 19 grams of ammonium heptamolybdate were dissolved in 100 milliliters of water to obtain solution II, Add solution II to solution I to obtain mixture I, add 49.3 grams of silica sol with a mass content of silicon oxide of 40% and 201.1 grams of aluminum sol with a mass content of alumina of 25% to mixture I and adjust the pH value to 8 with ammonia water to obtain mixture II , the mixture II was placed in a boiling water bath, heated and concentrated to a solid content of 55% by weight to obtain a slurry, and the slurry was dried at 80° C. with hot air with a relative humidity of 90% for 24 hours to obtain a catalyst precursor. The catalyst precursor was heated at 750 The catalyst was prepared by roasting at ℃ for 8 hours, and its composition was: 30% Fe ...

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Abstract

The invention relates to a catalyst for preparing low-carbon olefin from synthesis gas as well as a preparation method and application of the catalyst, and aims at mainly solving the problems in a process of preparing the low-carbon olefin from the synthesis gas that the activity and the selectivity of the catalyst are low at a low temperature. The problems are solved very well by adopting the technical scheme that a Fischer-Tropsch synthesis catalyst is adopted and is prepared from the following components in percentage by weight: (1) 20%-80% of an active component; (2) 20%-80% of a carrier, wherein the carrier is selected from at least one of SiO2 and Al2O3; the active component is represented by the following formula according to an atomic ratio: Fe100AaBbKcOx, wherein A is at least one of Cu and Zn; B is at least one of Cr and Mo; the value range of a is 5-50; the value range of b is 5-150; and the value range of c is 0.1-5. The catalyst can be used for industrial production of preparing the low-carbon olefin from the synthesis gas.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins from synthesis gas, a preparation method and application thereof. Background technique [0002] Low-carbon olefins (olefins with carbon atoms ≤ 4) represented by ethylene and propylene are the basic raw materials of the chemical industry. At present, the main raw materials of low-carbon olefins in the world are petroleum hydrocarbons, of which naphtha accounts for the majority, and there are Alkanes, hydrogenated diesel oil, some heavy oil, etc. At home and abroad, natural gas or light petroleum fractions are mostly used as raw materials, and low-carbon olefins are produced by steam cracking in ethylene complexes. Steam cracking is a large energy-consuming device in petrochemical industry, and it completely depends on non-renewable petroleum resources. With the increasing shortage of oil resources, it is urgent to find alternative resources. Therefore, the research work of producin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J27/057C07C11/04C07C11/06C07C1/04
CPCY02P20/52
Inventor 宋卫林陶跃武李剑锋庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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