Catalyst for synthesizing light olefins, preparation method and use method thereof

A technology of low-carbon olefins and catalysts, which is applied in the field of catalysts, preparations and applications for the synthesis of low-carbon olefins. It can solve the problems of low activity and selectivity at low temperatures, achieve high activity and low-carbon olefins selectivity, and strengthen adsorption and activation. , to promote the effect of restoration

Active Publication Date: 2017-03-15
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 synthesizing light olefins, preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 89.2 grams of ferric nitrate, 0.13 grams of potassium nitrate and 3.46 grams of silver nitrate in 100 ml of water to form solution Ⅰ of a certain concentration, dissolve 51.7 grams of ammonium metatungstate in 100 ml of water to obtain solution Ⅱ, add solution Ⅱ to solution Ⅰ Mixture I was obtained in , and 120 grams of aluminum sol with a mass content of 25% of alumina was added to mixture I and the pH value was adjusted to 8 with ammonia water to obtain mixture II. The mixture II was heated and concentrated 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 W 80 Ag 8 K 0.5 Ox+30%Al 2 o 3 . The catalyst is pulverized and screened with 20-40 mesh particles for use.

Embodiment 2

[0035] Take 76.7 grams of ferric nitrate, 15.3 grams of chloroauric acid solution, 6.37 grams of nickel nitrate and 0.66 grams of potassium nitrate dissolved in 100 ml of water to make a certain concentration of solution I, 25 grams of ammonium metatungstate and 0.1 grams of ammonium tellurate dissolved in In 100 milliliters of water, solution II was obtained, 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 8 with ammonia water to obtain mixture II, and mixture II was placed in Heat and concentrate in a boiling water bath 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 Catalyst, its composition is: 50%Fe 100 Ni 10 W 45 Au 17 K 3 Te 0.2 Ox+50%SiO2 2 . The catalys...

Embodiment 3

[0037] Dissolve 40.3 grams of ferric nitrate, 0.12 grams of potassium nitrate and 2.93 grams of silver nitrate in 100 milliliters of water to form solution I with a certain concentration, and dissolve 0.12 grams of ammonium selenate and 20.4 grams of ammonium metatungstate 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 10 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 10...

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Abstract

The invention relates to a catalyst for synthesizing light olefins as well as a preparation method and a using method of the catalyst, aiming at solving the problems that the catalyst has low activity and low selectivity at low temperature when preparing olefins by use of synthesis gas. The catalyst for preparing light olefins by use of synthesis gas is prepared from the following components in percentage by weight: (1) 20-80% of active component; and (2) 20-80% of carrier selected from at least one of SiO2 or Al2O3, wherein the general formula of the active component is as follows according to the atomic ratio: Fe100AaBbKcOx, A is selected from at least one of Ag or Au, B is selected from W, the range of a is 5-50, the range of b is 5-150, the range of c is 0.1-5, and x is the total number of the oxygen atoms required for meeting valences of other elements. The catalyst can solve the problems well and can be used for industrial production for preparing light olefins by use of synthesis gas.

Description

technical field [0001] The invention relates to a catalyst for synthesizing low-carbon olefins, 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 producing olefins from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J27/057C07C11/02C07C1/04
Inventor 宋卫林陶跃武李剑锋庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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