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Precipitated iron catalyst for catalyzing Fischer-Tropsch synthetic reaction and preparation method thereof

A technology of catalyst and troposynthetic synthesis, which is applied in the field of precipitated iron catalyst and its preparation, can solve the problems of poor stability of precipitated iron catalyst, achieve the effects of increasing long-term operation stability, improving stable support, increasing physical stability and mechanical strength

Active Publication Date: 2014-03-19
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to provide a precipitated iron catalyst for catalyzing the Fischer-Tropsch synthesis reaction and a preparation method thereof, so as to solve the technical problem of poor stability of the precipitated iron catalyst existing in the prior art

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  • Precipitated iron catalyst for catalyzing Fischer-Tropsch synthetic reaction and preparation method thereof
  • Precipitated iron catalyst for catalyzing Fischer-Tropsch synthetic reaction and preparation method thereof

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preparation example Construction

[0027] According to another aspect of the present invention, a method for preparing any one of the above-mentioned precipitated iron catalysts is provided. The method comprises the following steps: preparing ferric nitrate solution, copper nitrate solution and ferrous sulfate solution, mixing them to obtain a mixed salt solution; adjusting the pH of the mixed salt solution and stirring to obtain a precipitation slurry, separating the precipitation slurry to obtain a filter cake; Adding potassium ion-containing solution and / or potassium-containing silica sol, silica sol and magnesium-aluminum sol to the cake or adding potassium-containing silica sol and magnesium-aluminum sol to the filter cake, stirring to obtain a catalyst slurry; and drying the catalyst slurry , roasted to obtain a precipitated iron catalyst.

[0028] The present invention from the stable target phase magnetite Fe 3 o 4 Starting with the addition of magnesium-aluminum sol, silica sol and potassium-containi...

Embodiment 1

[0045] 3000g of Fe(NO 3 ) 3 ·7H 2 O, 1200g of FeSO 4 ·7H 2 O and 150 g Cu(NO 3 ) 2 ·3H 2 O was respectively dissolved (diluted) in distilled water, prepared into ferric iron and ferrous iron solutions with a concentration of 5% by mass percentage, mixed the above three metal salt solutions, stirred evenly and introduced nitrogen, heated under nitrogen atmosphere to 70°C to obtain a mixed salt solution.

[0046] Heat the ammonium carbonate solution with a concentration of 10% by mass to 60°C, use a pump to simultaneously add the ammonium carbonate solution and the mixed salt solution into a 20L stirred tank, heat the stirred tank with a jacket, maintain the temperature at 70°C, and pump The speed is carried out according to the metering ratio of the acidic solution and the alkaline solution. Under the protection of nitrogen, the precipitation is carried out under the conditions of a stirring rate of 200 rpm and a pH value of 7 to obtain a precipitation slurry. The preci...

Embodiment 2

[0052] 3500g of Fe(NO 3 ) 3 ·7H 2 O, 800g of FeSO 4 ·7H 2 O and 120 g Cu(NO 3 ) 2 ·3H 2 O was respectively dissolved (diluted) in distilled water, prepared into ferric iron and ferrous iron solutions with a concentration of 5% by mass percentage, mixed the above three metal salt solutions, stirred evenly and introduced nitrogen, heated under nitrogen atmosphere to 70°C to obtain a mixed salt solution.

[0053] Heat the ammonium carbonate solution with a concentration of 10% by mass to 70°C, and simultaneously add the ammonium carbonate solution and the mixed salt solution into a 20L stirred tank with a pump, heat the stirred tank with a jacket, maintain the temperature at 70°C, and pump the The speed is carried out according to the metering ratio of the acidic solution and the alkaline solution. Under the protection of nitrogen, the precipitation is carried out under the conditions of a stirring rate of 200 rpm and a pH value of 6 to obtain a precipitation slurry. The ...

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Abstract

The invention discloses a precipitated iron catalyst for catalyzing Fischer-Tropsch synthetic reaction and a preparation method thereof. The catalyst comprises the following components in part by weight: 100 parts of Fe, 0.1 to 10 parts of Cu, 0.1 to 10 parts of K, 0.1 to 10 parts of Mg, 0.1 to 10 parts of Al, and 1 to 20 parts of SiO2, wherein the elements Cu, K and Si exist in a form of oxides, Fe exists in a mixed form of Fe2O3 and Fe3O4, and Mg and Al exist in a form of composite oxide MgAl2O4. Reorganization and cracking of the catalyst in the Fischer-Tropsch synthetic reduction reaction are weakened, long-term running stability of the catalyst is improved, and the main body structure of the catalyst plays a role of a carrier and plays a role in activity balance; and in the presence of the MgAl2O4, the stability of the stable core of the catalyst is improved, and the physical stability and the mechanical strength of the precipitated iron catalyst are improved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a precipitated iron catalyst for catalyzing a Fischer-Tropsch synthesis reaction and a preparation method thereof. Background technique [0002] Fischer-Tropsch catalyzed synthesis process will contain CO, H 2 It is an effective way to convert syngas mainly into chemical feedstocks and liquid hydrocarbon products. Since it was first discovered by German scientists Fischer and Tropsch, it is referred to as Fischer-Tropsch synthesis (or F-T synthesis). The catalysts used in Fischer-Tropsch synthesis include various catalyst types based on multiple active metals, involving iron, cobalt, nickel, ruthenium, rhodium and many metal promoters. Among them, iron and cobalt series catalysts are the most concerned and have reached industrial applications. Iron-based catalysts are the most widely used because of their low cost, easy preparation and controllability, and good catalytic acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78C10G2/00
Inventor 吕毅军武鹏林泉王鹏石玉林门卓武
Owner CHNA ENERGY INVESTMENT CORP LTD
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