In situ outer prevulcanization method for hydrogenation catalyst

Abstract

The in-situ hydrogenation catalyst pre-sulfurizing method is to use ammonium sulfide solution containing sulfur to treat petroleum fraction hydrogenating catalyst with oxide of IVB metal Mo or W and VIII metal Co or Ni or their precursor loaded and to convert the oxide of the active component or their precursor into metal sulfide with hydrogenation activity. The outside pre-sulfuizing of the hydrogenation catalyst is utilized to replace available inside pre-sulfuizing, which has complicated operation and expensive cost. The method is suitable for all kinds of petroleum fraction hydrogenating catalyst and the processed catalyst has hydrogenation activity reaching or even exceeding that of internal pre-sulfurized one.

Description

technical field [0001] The invention relates to a new method for off-site presulfurization of hydrogenation catalysts, which belongs to the presulfurization technology of hydrogenation catalysts in petrochemical industry. It mainly uses a new type of sulfiding agent to carry out "outside" presulfurization of hydrogenation catalyst to achieve the purpose of "inside" presulfurization which was complex in operation and expensive in the past. The technology is characterized by the use of sulfur-containing ammonium sulfide [(NH 4 ) 2 S] solution treatment of any petroleum fraction hydrogenation catalyst loaded with Mo, W of Group IVB and Co, Ni oxides of Group VIII or their precursors, and make the active components (Mo, W, Co, A method for converting Ni) oxides or their precursors into metal sulfides with hydrogenation activity. Background technique [0002] The hydrogenation process of petroleum fractions is the key technology for producing clean oil products, among which, t...

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Problems solved by technology

[0004] (2) The vulcanizing agent added in the vulcanization process and the water and hydrogen sulfide generated by the reaction can easily cause corrosion of the high-pressure reactor and related equipment, resulting in equipment damage and potential safety hazards. This phenomenon has occurred many times at home and abroad

[0005] (3) The vulcanization process is longer, delaying the start time

[0006] (4) The vulcanizing agent used is flammable and toxic, and pollutes the environment during the vulcanization process

[0007] (5) The cost of pre-vulcanization in the device is higher

[0012] To sum up, some of the technologies reported in the current professional literature are limited to written reports and theoretical analysis and have not been implemented. Although the other part has been used and implemented in industry, it is also due to the complexity of the process and high processing costs. Moreover, the service life of the catalyst has been seriously affected and has not been widely used.