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Catalyst for producing low-carbon olefin as well as preparation method and using method of catalyst

A low-carbon olefin and catalyst technology, which is applied in the field of production of low-carbon olefin catalysts, can solve the problems of low activity and selectivity at low temperatures, achieve high activity and low-carbon olefin selectivity, promote dispersion, and promote the effect of reduction

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 catalysts for producing low-carbon olefins (C2-C4 olefins) from synthesis gas in the prior art at low temperatures. It provides a catalyst for producing low-carbon olefins, which is used for synthesis Gas to low carbon olefins, with good low temperature activity and low carbon olefin selectivity

Method used

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  • Catalyst for producing low-carbon olefin as well as preparation method and using method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 160.7 grams of ferric nitrate, 0.23 grams of potassium nitrate and 6.24 grams of silver nitrate and dissolve them in 100 milliliters of water to form solution I with a certain concentration, and dissolve 131.5 grams of manganese nitrate solution with a concentration of 50% by mass in 100 milliliters of water to obtain solution II Add solution II to solution I to obtain mixture I, add 120 grams of aluminum sol with a mass content of 25% alumina 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 The solid content is 55% by weight to obtain a slurry, and the slurry is 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 is roasted at 750° C. for 3 hours to obtain a catalyst, which consists of: 70% Fe 100 mn 80 Ag 8 K 0.5 Ox+30%Al 2 o 3 . The catalyst is pulverized and screened with 20-40 mesh p...

Embodiment 2

[0036] Take 106.2 grams of ferric nitrate, 21.2 grams of chloroauric acid solution, 8.82 grams of nickel nitrate and 0.92 grams of potassium nitrate and dissolve them in 100 milliliters of water to form a solution of a certain concentration. Dissolve 15.97 grams of ammonium metavanadate and 0.14 grams of ammonium tellurate 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 V 45 Au 17 K 3 Te 0.2 Ox+50%S...

Embodiment 3

[0039] Get 68.35 grams of ferric nitrate, 0.2 grams of potassium nitrate and 4.98 grams of silver nitrate dissolved in 100 milliliters of water to make a certain concentration of solution I, 0.21 grams of ammonium selenate and 48.9 grams of manganese nitrate solution with a concentration of 50% by mass are dissolved in In 100 milliliters of water, solution II was obtained, and solution II was added to solution I to obtain mixture I, and 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% were added to mixture I and adjusted with ammonia water When the pH value reaches 10, the mixture II is obtained, and the mixture II is heated and concentrated in a boiling water bath to a solid content of 55% by weight to obtain a slurry, and the slurry is 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 calcined at 750°C for ...

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Abstract

The invention relates to a catalyst for producing low-carbon olefin and a preparation method of the catalyst, and mainly aims to solve the problems of low activity and low selectivity of the catalyst at low temperature in synthesis gas prepared olefin. The problems can be well solved by adopting the technical scheme that the catalyst is prepared from the following components in percentage by weight: 20-80 percent of an active ingredient (1) and 20-80 percent of carrier (2) which is at least one of SiO2 and Al2O3, wherein the active ingredient is as shown in the general formula Fe100AaBbKcOx in an atomic ratio, A is at least one of Ag and Au, and B is at least one of Mn and V; 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 applied to industrial production of low-carbon olefin from synthesis gas.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins, a preparation method of the catalyst 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 oils, 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): B01J23/89C07C1/04C07C11/02
Inventor 宋卫林陶跃武李剑锋庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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