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Cobalt-molybdenum type carbon-monoxide sulfur-resistance transformation catalyst and its preparation method

A carbon monoxide and sulfur-resistant conversion technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the difficulty of breaking bars, affecting the normal progress of industrial production, bed problems such as increased layer resistance, to solve the effects of poor anti-powdering performance, increased macroscopic activity under pressure, and reduced wear rate

Active Publication Date: 2009-09-02
青岛联信催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Spherical catalysts have the advantages of good fluidity, uniform particle distribution and catalyst bed packing density, and uniform airflow distribution, but the catalyst strength and strength stability are poor, and it is prone to surface peeling, powder falling and agglomeration, which leads to bed resistance during use. increase, affecting the normal progress of industrial production
[0005] Strip catalysts have the advantages of high strength and high strength stability, and are mostly used in high-temperature and high-pressure sulfur-resistant shift processes. However, the fluidity of the catalyst is poor. When making a small-sized particle catalyst with a specified length, it is difficult to break the strip and cause a lot of waste of raw materials. And the broken strips are uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 150 grams of pseudo-boehmite, 30 grams of magnesium oxide, 10 grams of metatitanic acid, and 6 grams of scallop powder are mixed evenly, kneaded with 3% citric acid solution, extruded, and cut into polygonal spheres with a particle diameter of 6 mm, the number of ribs is 5, and the carrier is obtained by sintering at 500° C. for 4 hours.

[0036] Take 50 grams of carrier, mix 6 grams of ammonium molybdate, 3.0 grams of cobalt nitrate and 16 grams of potassium carbonate, and use 18% ammonia water to make a co-impregnation solution, impregnate the carrier with an equal volume of co-immersion solution, and roast at 400 ° C to obtain catalyst.

[0037] The number of the prepared catalyst is C-1, and the evaluation data of its strength, abrasion and activity are shown in Table 1.

Embodiment 2

[0039] Weigh 400 grams of aluminum nitrate to prepare an aqueous solution, knead with 100 grams of MgO, roast at 400 ° C for 4 hours, crush the roasted material through a 200-mesh sieve; take 100 grams of powder, 200 grams of Al(OH) 3 , 10 grams of titanium-zirconium mixture (Ti / Zr=1 / 1, molecular ratio), mix, then add 5% nitric acid 80ml and knead, extrude, press into polygonal prisms, and roast 3 hours in 500 ℃, A multi-prism catalyst carrier was prepared, the length of the carrier particles was 5 mm, the maximum diameter was 3 mm, and the number of edges was 9.

[0040] Prepare 30ml of impregnation solution with 5 grams of ammonium molybdate, 3 grams of cobalt nitrate and 1.5 grams of sodium carbonate. Weigh 50 grams of carrier and soak in the solution for 3 hours, then roast at 400°C for 3 hours to obtain the catalyst.

[0041] The catalyst number is C-2, and the evaluation data of its strength, abrasion and activity are shown in Table 1.

Embodiment 3

[0043] Preparation of MgO / Al 2 o 3 Mg = 1.0 (molecular ratio) 2+ -Al 3+ Co-precipitate powder, weigh 100 grams of the above powder, add 10 grams of titanium-zirconium mixture (Ti / Zr=1 / 1, molecular ratio), after mixing evenly, add (NH) with a mass concentration of 25%. 6 Mo 7 o 24 4H 2 O aqueous solution 110 grams, the mass concentration is 30% Co (NO 3 ) 2 ·6H 2 110 grams of O aqueous solution was fully kneaded and dried, pulverized and passed through a 180-mesh sieve to obtain an intermediate.

[0044]Add the above-mentioned intermediate to the safflower powder, the amount of the safflower powder is 3%, after kneading, extruding, pressing and cutting into polygonal prisms, the particle length is 8 mm, the maximum diameter is 4 mm, and the number of ribs is 15, then after 500 ℃ calcined for 3 hours to prepare a multi-prismatic catalyst.

[0045] The catalyst number is C-3, and the evaluation data of its strength, abrasion and activity are shown in Table 1.

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Abstract

A catalyst in the form of prismatic (5-9) column or sphere is composed of the active component which is the compound containing Co and Mn and / or W and / or Ni and the carrier chosen from aluminium oxide, magnesium oxide, titanium oxide and zirconium oxide. Its advantages is high mechanical strength.

Description

technical field [0001] The invention relates to a cobalt-molybdenum-based carbon monoxide sulfur-resistant shift catalyst and a preparation method thereof, belonging to the technical field of industrial catalysis. Background technique [0002] The cobalt-molybdenum-based carbon monoxide sulfur-tolerant shift catalyst includes active components and supports, and has the characteristics of high shift activity and no sulfur poisoning. The process of extracting ammonia synthesis gas, hydrogen and oxo synthesis gas. [0003] At present, the sulfur-resistant shift catalysts that have been widely used in process equipment include rolled spherical catalysts and extruded strip catalysts, such as the catalysts described in Chinese special trains CN87107892 and CN89108457. [0004] Spherical catalysts have the advantages of good fluidity, uniform particle distribution and catalyst bed packing density, and uniform airflow distribution, but the catalyst strength and strength stability a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/882B01J23/887C01B3/40
CPCY02P20/52
Inventor 刘捷丁章云郭建民
Owner 青岛联信催化材料有限公司
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