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Method for preparing sulphur tail gas hydrogenation catalyst

A hydrogenation catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of catalyst pore volume, large specific surface area, complex preparation process, etc. problems, to achieve the effect of reducing catalyst loading, high hydrolysis activity, and good hydrothermal stability

Inactive Publication Date: 2006-08-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is complicated. After two dryings and two roastings, the pore volume and specific surface area of ​​the catalyst are relatively reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 7Kg of ammonium molybdate and 4.2Kg of cobalt nitrate in 60 liters of deionized water, stir to dissolve, add 5Kg of citric acid, stir to dissolve, and prepare a stable metal salt solution 1.

[0017] Weigh 70Kg SiO 2 Content is 2.5% (wt), the pore volume is 1.12 milliliters / gram, specific surface area is 445 square meter / gram aluminum hydroxide dry glue, add 3Kg Tianqing powder, mix. Add the metal salt solution 1 above. Knead, extrude into Ф3mm clover strips, dry at 110°C for 4 hours, and bake at 450-550°C for 4 hours to make Co-Mo-SiO 2 -γ-AL 2 o 3 Catalyst (A), wherein molybdenum oxide (MoO 3 ) content is 9.3% (m / m), cobalt oxide (CoO) content is 1.80% (m / m). Its properties are shown in Table 1.

Embodiment 2

[0018] Embodiment 2 (comparative example)

[0019] Weigh 70Kg of aluminum hydroxide dry glue prepared by the method of Example 1, add 3Kg of Tianqing powder, and mix well. Dissolve 4.3Kg (65%) nitric acid in 60 liters of deionized water, stir evenly, add to the above mixed aluminum hydroxide dry glue, knead, extrude into Ф3mm clover strips, dry at 110°C for 4 hours, 550 ℃ calcination for 4 hours to make SiO 2 -γ-AL 2 o 3 carrier.

[0020] Take 80ml of ammonia water with a concentration of 22-28%, heat it to 50°C, add 15g of cobalt nitrate, and slowly add 1ml of ethylenediamine after it is completely dissolved to form a stable cobalt ethylenediamine complex, and then add Stir 24g of ammonium molybdate until completely dissolved, and set the volume to 100ml to obtain a stable cobalt-molybdenum impregnation solution.

[0021] Take 70ml of the above impregnation solution and add it to the 100g of SiO prepared above 2 -γ-AL 2 o 3 In the carrier, immerse for 1 hour, dry at 1...

Embodiment 3

[0023] The preparation method is the same as in Example 1, but the ammonium molybdate is 10Kg, and the cobalt nitrate is 6.3Kg to make Co-Mo-SiO 2 -γ-AL 2 o 3 Carrier (C), in which molybdenum oxide (MoO 3 ) content is 14.7% (m / m), cobalt oxide (CoO) content is 2.75% (m / m). Its properties are shown in Table 1.

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PUM

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Abstract

The present invention is the preparation process of sulfur tail gas hydrogenating catalyst. The catalyst is prepared with silica modified aluminum hydroxide dry glue as main material and VIB and VIII metals as active component, and through compounding stable solution with stabilizer and mixing and kneading process to make extruded stripe. The catalyst has specific surface area greater than 300 sq m / g, porosity higher than 0.50 ml / g and cloveleaf form. It has the features of simple preparation process, low cost, high organic sulfide hydrogenolyzing activity, high CS2 and COS hydrolyzing activity and high activity stability, and may be used in the Claus tail gas hydrogenating process.

Description

technical field [0001] The present invention relates to a kind of preparation method of Claus (Klaus) tail gas hydrogenation catalyst, more specifically, relate to a kind of γ-AL modified by silicon oxide 2 o 3 The invention relates to a preparation method of a catalyst in which cobalt and molybdenum are used as a carrier and active components. Background technique [0002] In the Claus+scot sulfur recovery process, the sulfuric acid gas enters the hydrogenation reactor after two-stage Claus conversion, and under the action of the hydrogenation catalyst, the elemental sulfur and sulfur-containing compounds in the tail gas are hydrogenated or hydrolyzed It is converted into hydrogen sulfide, then selectively absorbed by amine liquid, and the purified tail gas is discharged into the atmosphere. One of the key technologies affecting the total sulfur recovery rate of the process is the use of highly active sulfur-containing compounds (or elemental su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08B01J37/04B01J23/85B01D53/48B01D53/86
Inventor 张孔远刘爱华燕京张红宇
Owner CHINA PETROLEUM & CHEM CORP
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