Hydrogenation catalyst presulfurizing method

A hydrogenation catalyst and vulcanization medium technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex process and long processing time, and achieve simple operation, fast vulcanization process, Effect of reducing vulcanization cost

Inactive Publication Date: 2007-08-29
DAQING GASOLINEEUM INST
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  • Abstract
  • Description
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Problems solved by technology

This method reduces the amount of additives, but the process is complicated including catalyst drying, impregnation and vulcanization, so the processing time is long

Method used

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  • Hydrogenation catalyst presulfurizing method

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Effect test

Embodiment 1

[0022] Embodiment 1, composition MoO of oxidation state catalyst 316.0%, NiO 1.95%, CoO 2.85%, the carrier is alumina, and the particle size of the catalyst is 20-32 mesh. Add 5g of the above-mentioned catalyst into the middle of a fixed-bed vulcanization reactor with an inner diameter of 16mm and a height of 300mm, and fill it with small ceramic balls up and down. Adjust the flow of sulfide gas to 100mL / min, pass it into the fixed bed, and carry out the sulfidation reaction under the conditions of 350 ° C and 0.1 MPa. The reaction time is 0.5 h. 2 Cool to room temperature in atmosphere. The volume percentage of acid gas in sulfide gas is 8%, H 2 10% by volume, N 2 The percentage content is 82%. The acid gas comes from the refinery of Daqing Petrochemical Company, where H 2 S is 38%, CO 2 60%, other impurity gases 2%. The obtained product is measured by combustion-neutralization titration method, the degree of sulfidation of the product is 83.7%, and the bromine value m...

Embodiment 2

[0023] Embodiment 2. Add 5 g of the catalyst in Embodiment 1 into the middle of a fixed-bed reactor with an inner diameter of 16 mm and a height of 300 mm, and fill it up and down with small ceramic balls. Adjust the flow rate of sulfide gas to 100mL / min, pass it into the fixed bed, and carry out the sulfidation reaction under the conditions of 400 ° C and 0.1 MPa. The reaction time is 5 hours. 2 Cool to room temperature in atmosphere. The volume percentage of acid gas in sulfide gas is 22%, H 2 10% by volume, N 2 The percentage content is 68%. The acid gas comes from the refinery of Daqing Petrochemical Company, where H 2 S is 38%, CO 2 60%, other impurity gases 2%. The obtained product is measured by combustion-neutralization titration method, and the degree of sulfidation of the product is 87.4%, and the bromine value measured by SH / T0236-92 petroleum product bromine value determination method is 0.14gBr 2 / 100g.

Embodiment 3

[0024] Embodiment 3. Add 5 g of the catalyst in Embodiment 1 into the middle of a fixed-bed reactor with an inner diameter of 16 mm and a height of 300 mm, and fill it up and down with small ceramic balls. Adjust the flow of sulfide gas to 100mL / min, pass it into the fixed bed, and carry out the sulfidation reaction under the conditions of 500 ° C and 0.1 MPa. The reaction time is 4 hours. 2 Cool to room temperature in atmosphere. The volume percentage of acid gas in sulfide gas is 13%, H 2 10% by volume, N 2 The percentage content is 77%. The acid gas comes from the refinery of Daqing Petrochemical Company, where H 2 S is 38%, CO 2 61%, other impurity gases 1%. The product obtained is measured by combustion-neutralization titration method, and the degree of sulfidation of the product is 79.4%, and the bromine value measured by SH / T0236-92 petroleum product bromine value determination method is 0.73gBr 2 / 100g.

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Abstract

This invention discloses a hydrogenation catalyst pre-curing method. The method used the by-products of the oil and gas industry processing acidic gas as medium sulfide, pretreatment the hydrogenation catalyst, the main component of acid gas is hydrogen sulfide and carbon dioxide, the invention can be used inside or outside of pre-vulcanization mode, put the oxidation states catalyst into vulcanization reactor, heated to200-500degree centigrade in an inert atmosphere, and then conducted hydrogen and acid gas to sulphate under 0.1-10MPa pressure, the reaction time is 0.5 to 30 hours, of which an acid gas occupy 1-40%. The invention method not only overcome the presence of sulfide wet curing agent losses, metal tube surface corrosion defects, also have fast curing process, even curing, can greatly improve the activity and stability of catalysts, extended catalyst life and other advantages, and wide sulfide-media sources, easy to get, significantly lower sulfide cost.

Description

Technical field: [0001] The invention relates to a method for pretreatment of a hydrogenation catalyst in the field of chemical industry, in particular to a method for presulfurization of a hydrogenation catalyst. Background technique: [0002] At present, most of the hydrogenation catalysts used in industry use Mo, W of Group VIB, Ni, Co and other metal elements of Group VIII as the active components of hydrogenation catalysts, and are dispersed on the porous carrier in an oxidized state. Research experiments have shown that this form of catalyst has low hydrogenation activity and poor stability. In the process of hydrogenation operation, although the raw oil contains sulfide, it can be converted into a sulfurized state through reaction, but under the reaction conditions, the sulfur content of the raw oil is too low and the sulfuration is not complete, which leads to the reduction of part of the metal. Catalyst activity can not reach the normal level. Experiments have pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/20B01J27/051
Inventor 董群王鉴杨春亮邹丹祁兴国陈慧娟张建伟段吉国高善彬
Owner DAQING GASOLINEEUM INST
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