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

A technology of low-carbon olefins and catalysts, which is applied in the field of synthesis gas-based low-carbon olefins catalysts, preparation and use, which can solve the problems of low activity and selectivity at low temperatures, achieve high activity and low-carbon olefins selectivity, and strengthen adsorption Activation and reduction promotion effect

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolve 87.4 grams of ferric nitrate, 0.13 grams of potassium nitrate and 4.83 grams of copper nitrate in 100 milliliters of water to form solution I with a certain concentration, dissolve 53.6 grams of ammonium perrhenate 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 Re 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.

[0035]

Embodiment 2

[0037] Take 82.6 grams of ferric nitrate, 11.94 grams of zinc nitrate, 6.87 grams of nickel nitrate and 0.72 grams of potassium nitrate and dissolve them in 100 milliliters of water to form a solution of a certain concentration. Dissolve 0.08 grams of ammonium selenate and 28.5 grams of ammonium perrhenate in 100 milliliters of Solution II was obtained in water, solution II was added to solution I to obtain mixture I, 125 grams of silica sol with a silicon oxide mass content of 40% was added to mixture I and the pH value was adjusted to 9 with ammonia water to obtain mixture II, and mixture II was placed 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. Its composition is: 50% Fe 100 Ni 10 Re 45 Zn 17 K 3 Te 0.2 Ox+50%SiO2 2 . The ...

Embodiment 3

[0040] Get 40 grams of ferric nitrate, 4.14 grams of zinc nitrate and 0.12 grams of potassium nitrate and dissolve in 100 milliliters of water to form a solution I with a certain concentration; 0.12 grams of ammonium selenate and 21.5 grams of ammonium perrhenate are 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 preparation of low-carbon olefin from synthesis gas as well as a preparation method and an application method of the catalyst and mainly aims at solving the problem that activity and selectivity of a catalyst are low at low temperature in a process of preparing the olefin from the synthesis gas. The catalyst for the preparation of the low-carbon olefin from the synthesis gas comprises the following components in percentage by weight: 20-80% of an active component and 20-80% of a carrier, wherein the carrier is at least one of SiO2 and Al2O3, the active component can be shown in the following general formula in an atomic ratio: Fe100AaBbKcOx, wherein A is at least one of Cu and Zn; B is Re; the value range of a is 5-50; the value range of b is 5-150; the value range of c is 0.1-5; and x is the total number of oxygen atoms required by valences of other elements. By adopting the technical scheme, the problem is relatively well solved, and the catalyst provided by the invention can be applied to the preparation of 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 a use method 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 produci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/84B01J27/057C07C11/02C07C1/04
Inventor 宋卫林陶跃武李剑锋庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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