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Sulfur tail gas hydrogenation catalyst and preparation method

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of incomplete catalyst vulcanization, unstable catalyst activity, and easy overheating, etc., and achieve significant Economic and social benefits, avoiding excessive discharge of SO2, and high initial activity

Active Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The vulcanization method is divided into internal pre-vulcanization and external pre-vulcanization. In the industry, internal pre-vulcanization is mainly used. This vulcanization method mainly has the following problems: (1) The heat released during the vulcanization process of the catalyst is large, and it is easy to overheat, resulting in catalyst deactivation; (2) It is easy to cause the catalyst to be incompletely vulcanized, which affects the catalytic activity; (3) During the vulcanization period, there is no H 2 S or H 2 Under certain conditions, it is easy to cause permanent deactivation of the catalyst; (4) The catalyst activity is unstable at the initial stage of the reaction, and the vulcanization time is long
[0004] The external pre-sulfurization catalyst also exists in the conventional oxidation state, and the vulcanization process is incomplete. At the same time, special pre-sulfurization equipment and raw materials need to be added, which greatly increases the production cost of the catalyst.
The development of presulfurized sulfur tail gas hydrogenation catalysts is less researched at home and abroad, and there is an urgent need to develop presulfurized sulfur tail gas hydrogenation catalysts to shorten the start-up time and avoid incomplete sulfurization of catalysts.

Method used

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  • Sulfur tail gas hydrogenation catalyst and preparation method
  • Sulfur tail gas hydrogenation catalyst and preparation method
  • Sulfur tail gas hydrogenation catalyst and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] With 200 grams of pseudo-boehmite (specific surface area is 300m 2 / g), 25 grams of basic activated carbon, 3 grams of calcium oxide, 4 grams of scallop powder, 28 grams of nitric acid, and 270 grams of deionized water are mixed uniformly, extruded on the extruder, dried at 120°C for 4 hours, and dried at 500 ℃ for 4 hours to prepare the catalyst carrier.

[0042] Get 80ml of deionized water, add 20ml of diethylenetriamine and stir to form a diethylenetriamine solution, add 26g of ammonium tetrathiomolybdate in the diethylenetriamine solution, and make it form a stable solution under heating and stirring; Add 5ml of phosphoric acid to 80ml of deionized water, mix 5.52g of basic nickel carbonate and 2.66g of cobalt nitrate hexahydrate evenly, add to the aqueous solution containing phosphoric acid, and stir until completely dissolved. The above two solutions are mixed, stirred evenly, and constant volume to obtain the active component impregnation solution. The carrier ...

Embodiment 2

[0046] With 180 grams of pseudo-boehmite (specific surface area is 300m2 / g), 10 grams of basic activated carbon, 2 grams of calcium oxide, 4 grams of scallop powder, 35 grams of nitric acid, and 250 grams of deionized water are mixed uniformly, extruded on the extruder, dried at 120°C for 4 hours, and dried at 500 ℃ for 4 hours to prepare the catalyst carrier.

[0047] Take 80ml of deionized water, add 15ml of methanol and stir to form a methanol solution, add 32.5g of ammonium tetrathiomolybdate into the methanol solution, heat and stir to form a stable solution; take 6g of citric acid and add 70ml of deionized water , mix 8.28g basic nickel carbonate and 0.73g basic cobalt carbonate, add to the aqueous solution containing citric acid, and stir until completely dissolved. The above two solutions are mixed, stirred evenly, and constant volume to obtain the active component impregnation solution. The carrier impregnated with the co-impregnation solution was dried at 110°C for...

Embodiment 3

[0051] With 190 grams of pseudo-boehmite (specific surface area is 300m 2 / g), 30 gram alkaline activated carbon, 4 gram sodium carbonate, 4 gram safflower powder, 30 gram nitric acid, 280 gram deionized water mix uniformly, extrude molding on extruder, dry 4 hours at 120 ℃, at 450 ℃ for 4 hours to prepare the catalyst carrier.

[0052] Take 100ml of deionized water, add 20ml of ethanolamine and stir to form an ethanolamine solution, add 48.75g of ammonium tetrathiomolybdate into the ethanolamine solution, and heat and stir to form a stable solution; add 5g of acetic acid to 60ml of deionized water, Mix 38.4g of nickel nitrate hexahydrate and 2.0g of cobalt nitrate hexahydrate evenly, add it into the aqueous solution containing phosphoric acid, and stir until completely dissolved. The above two solutions are mixed, stirred evenly, and constant volume to obtain the active component impregnation solution. The carrier was impregnated with the co-impregnation solution for 1 hour...

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Abstract

The invention relates to a novel sulfur tail gas hydrogenation catalyst and a preparation method thereof. Active components in a form of sulfides of the catalyst are supported on a catalyst carrier. The active components are sulfides of cobalt, molybdenum and nickel. The catalyst has the characteristics of no pre-vulcanization, high initial activity and good stability. The catalyst is in a vulcanized state and does not need to be vulcanized in use. Through use of the catalyst, sulfur device problems of environmental protection and safety during pre-vulcanization are avoided, excessive emission of SO2 during sulfur device operation is avoided, green operation is realized and significant economic and social benefits are obtained.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and relates to a sulfur tail gas hydrogenation catalyst and a preparation method thereof. Background technique [0002] Sulfur recovery tail gas hydrogenation catalyst is mainly based on C O , M O , Ni, W, etc. are active metal components. The metal components mainly exist on the catalyst in the form of oxidation, and have low hydrogenation activity. Presulfidation treatment is required to convert the oxidation state into a sulfurized state with high hydrogenation activity. In order to maximize the role of tail gas hydrogenation catalyst. [0003] The vulcanization method is divided into internal pre-vulcanization and external pre-vulcanization. In the industry, internal pre-vulcanization is mainly used. This vulcanization method mainly has the following problems: (1) The heat released during the vulcanization process of the catalyst is large, and it is easy to overheat, resulting in ca...

Claims

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Application Information

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IPC IPC(8): B01J27/051
CPCB01J27/0515
Inventor 刘增让吴基荣崔基宏刘爱华刘剑利陶卫东徐翠翠
Owner CHINA PETROLEUM & CHEM CORP
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