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Iron-based catalyst for directly preparing low-carbon olefin from synthesis gas as well as preparation method and application of iron-based catalyst

A technology of iron-based catalysts and low-carbon olefins, which is applied in the direction of catalyst activation/preparation, carbon compound catalysts, catalysts, etc., and can solve the problems of low selectivity of low-carbon olefins and poor catalyst stability

Active Publication Date: 2022-06-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of low selectivity of low-carbon olefins and poor catalyst stability in the prior art, the present invention provides an iron-based catalyst for direct production of low-carbon olefins from synthesis gas and its preparation method and application. The catalyst has low-carbon olefins High selectivity and good catalyst stability

Method used

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  • Iron-based catalyst for directly preparing low-carbon olefin from synthesis gas as well as preparation method and application of iron-based catalyst
  • Iron-based catalyst for directly preparing low-carbon olefin from synthesis gas as well as preparation method and application of iron-based catalyst
  • Iron-based catalyst for directly preparing low-carbon olefin from synthesis gas as well as preparation method and application of iron-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1. Preparation of catalyst

[0063] Get 397.1 grams of ferric nitrate, add (1000g) water to dissolve, and obtain material I; Stir and dissolve to obtain material II.

[0064] The materials I and II were stirred and mixed, and 312.5 grams of 40% (weight) aluminum sol material was added under stirring, and then a solution (50 g) containing 0.33 grams of KOH was added, and the pH value of the above slurry was adjusted with ammonia water to make the mixed slurry. pH=6.0, then add a solution (10 g) containing 0.50 g of cerium nitrate, and after thorough stirring, the prepared slurry is formed into microspheres in a spray dryer according to the usual method, and finally the inner diameter is 89 mm and the length is 1700mm In the rotary calcining furnace, calcined at 500 ° C for 2.0 hours, and the prepared catalyst is composed of:

[0065] 50 wt% Fe 100 Mn 60.0 Cu 5.0 Co 1.0 Ga 2.0 K 0.5 Ce 0.5 O x +50 wt% Al 2 O 3

[0066] 2. Reduction, carbonization and evalua...

Embodiment 2

[0080] Take 247.3 grams of ferric nitrate, add (600g) water to dissolve to obtain material I, take 236.1 grams of 50% manganese nitrate, 29.27 grams of copper nitrate, 8.99 grams of gallium nitrate and 35.30 grams of cobalt nitrate in the same container, add (200g) of water, Stir and dissolve to obtain material II.

[0081] The materials I and II were stirred and mixed, and 312.5 grams of 40% (weight) aluminum sol material was added under stirring, and then a KOH solution (50 g) containing 3.28 grams was added, and the acidity of the above-mentioned slurry was adjusted with ammonia water to make the pH of the mixed slurry = 6.0, then add the solution (100g) containing 5.02 grams of cerium nitrate, get the slurry after fully stirring, carry out the microsphere forming of the slurry in the spray dryer, and finally the catalyst made by roasting consists of:

[0082] 50 wt% Fe 100 Mn 110.0 Cu 20.0 Co 20.0 Ga 8.0 K 8.0 Ce 8.0 O x +50 wt% Al 2 O 3

[0083] Reduction of th...

Embodiment 3

[0090] Get 42401 grams of ferric nitrate, add (1000g) water to dissolve, get material I, get 294.5 grams of 50% manganese nitrate, 25.11 grams of copper nitrate, 15.43 grams of gallium nitrate and 30.20 grams of cobalt nitrate in the same container, add (200g) of water, Stir and dissolve to obtain material II.

[0091] The materials I and II were stirred and mixed, and 187.5 grams of 40% (weight) aluminum sol material was added under stirring, and then a solution (100 g) containing 3.52 grams of KOH was added, and the acidity of the above-mentioned slurry was adjusted with ammonia water to make the pH of the mixed slurry. = 6.0, then add a solution (100g) containing 22.60 grams of cerium nitrate, obtain a slurry after thorough stirring, carry out microsphere molding in a spray dryer, and finally the catalyst made by roasting consists of:

[0092] 70wt% Fe 100 Mn 80.0 Cu 10.0 Co 10.0 Ga 8.0 K 5.0 Ce 5.0 O x +30% wt Al 2 O 3

[0093] Reduction of the resulting catalys...

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Abstract

The invention discloses an iron-based catalyst for directly preparing low-carbon olefin from synthesis gas as well as a preparation method and application of the iron-based catalyst. The iron-based catalyst for directly preparing the low-carbon olefin from the synthesis gas comprises a carrier and an active component, the active component comprises the following metal elements: Fe, Mn, Ga, A, B and C. A comprises at least one selected from alkali metals; b comprises at least one of lanthanide elements; c comprises at least one selected from Cu and Co; the Fe element exists in the catalyst in the forms of carbide and oxide. The catalyst has the characteristics of high low-carbon olefin selectivity and good catalyst stability.

Description

technical field [0001] The invention relates to an iron-based catalyst for directly producing low-carbon olefins from synthesis gas, and a preparation method and application thereof. Background technique [0002] The method of converting synthesis gas into hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes heterogeneous catalytic hydrogenation on metal catalysts to generate linear alkanes and alkenes. The process of the main mixture. Germany carried out research and development in the 1920s, industrialized in 1936, and closed after World War II because it could not economically compete with the oil industry. [0003] Syngas direct-to-light olefin catalysts, which have grown considerably over the decades, typically include the following components: active metals (Group VIII transition metals), oxide supports or structural aids (SiO 2 , Al 2 O 3 etc.), chemical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J23/889B01J37/03B01J37/00B01J37/08B01J37/18C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J27/22B01J23/8892B01J23/002B01J37/031B01J37/0045B01J37/082B01J37/18B01J37/08C07C1/044C07C2527/22C07C2523/889B01J2523/00C07C11/04C07C11/06C07C11/08B01J2523/13B01J2523/17B01J2523/31B01J2523/32B01J2523/3712B01J2523/72B01J2523/842B01J2523/845Y02P20/52
Inventor 陶跃武庞颖聪李剑锋戴毅敏赵相武
Owner CHINA PETROLEUM & CHEM CORP
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