Claus tail gas hydrogenation catalyst

A technology of hydrogenation catalyst and Claus tail gas, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problems of prolonging the loading and unloading time of the catalyst, and the specific surface area needs to be improved, so as to achieve easy ball formation, Strong anti-powdering ability and high lateral compressive strength

Active Publication Date: 2008-12-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since sulfur tail gas hydrogenation devices generally use horizontal reactors, the bar-shaped (or clover) catalyst prepared by this patent is not as convenient as the ball-shaped catalyst, especially when unloading the catalyst, it is not easy to separate from the ceramic balls on the upper and lower parts of the reaction bed. , prolong catalyst loading and unloading time
The specific surface area of ​​the catalyst needs to be improved

Method used

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  • Claus tail gas hydrogenation catalyst
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 10Kg of silicon-modified aluminum hydroxide dry rubber powder with a pore volume of 1.2 ml / g, a specific surface area of ​​438 m2 / g, and a silicon dioxide content of 2.5%, and place it in a roasting furnace at 600°C for rapid dehydration for 1 hour , get material 1. Take by weighing 0.43 milliliters / gram of pore volume, the specific surface area is 40Kg of aluminum hydroxide quick de-powder of 321 square meter / gram, mixes with material 1 evenly.

[0030] Prepare nitric acid with a concentration of 8% (m / m), add 4 kg of silica sol with a concentration of 25%, and make a uniform solution. Put the above-mentioned mixed materials in the rolling ball machine, slowly spray the prepared solution into the above-mentioned mixed materials, turn the rolling balls to form, sieve, sieve out 3 ~ 5mm small balls, put them in 100% water In a steam atmosphere, hydrated for 10 hours, dried at 120°C for 6 hours, and calcined at 450°C for 4 hours to obtain spherical Al with a pore v...

Embodiment 2

[0055] The preparation method is the same as in Example 1, the silicon dioxide content in the silicon-modified aluminum hydroxide dry rubber powder is 2%, the pore volume is 1.1 ml / g, and the specific surface area is 418 square meters / g. Catalyst G was prepared, and its physicochemical properties are shown in Table 4.

Embodiment 3

[0057] The preparation method is the same as in Example 1, the silicon dioxide content in the silicon-modified aluminum hydroxide dry rubber powder is 1%, the pore volume is 0.94 ml / g, and the specific surface area is 387 m2 / g. Catalyst H was obtained, and its physicochemical properties are shown in Table 4.

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Abstract

The Claus tail gas hydrogenating catalyst is prepared with aluminum hydroxide powder and aluminum hydroxide gum modified with great pore volume and great specific surface area silicon as main materials and through rolling to from ball, curing, stoving and roasting to prepare carrier, and soaking in solution containing VIB and VIII metal salt. The prepared catalyst is spherical, and has specific surface area greater than 260 sq m / g, pore volume greater than 0.35 ml / g, high side pressure strength, homogeneously dispersed active component, high organic sulfide hydrogenolyzing activity, high CS2 and COS hydrolysis activity and high activity stability. It is used in Claus tail gas hydrogenating process.

Description

technical field [0001] The invention relates to a Claus tail gas hydrogenation conversion catalyst. Background technique [0002] In the sulfur recovery Claus tail gas reduction and absorption process, the acid gas enters the hydrogenation reactor after the secondary Claus transformation, 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 hydrogen sulfide, which is then selectively absorbed by amine liquid, and the purified tail gas is discharged into the atmosphere. One of the key technologies of this process is the matching highly active sulfur compound (or elemental sulfur) hydroconversion catalyst. [0003] At present, most of the hydrogenation patents of sulfur tail gas applied abroad adopt a two-stage process, that is, the upper part of the hydrogenation reactor is filled with a hydrolysis catalyst, and the lower part is filled with a hydrogenation catalyst. Su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01J32/00B01J21/04C01B17/04
Inventor 张孔远刘爱华燕京
Owner CHINA PETROLEUM & CHEM CORP
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