Research Institute of Petroleum Industry (ripi)

Nti Company

Research Institute of Petroleum Industry

Research Institute of Petroleum

Reza Hashemi

Khaled Forsat

Mohammad Reza Khattaty

Hossein Manafi Varkiani

Salambek Naibovich Khadzhiev

Khusain Magamedovich Kadiev

Vahid Khumaidovich Mezhidov

Jamshid Zarkesh

Seyed Kamal Masoudian Targhi

Manafi Varkiani Hossein

Salambek Naibovich Khadjiev Khadjiev

Khusain Magamedovich Kadiev Kadiev

Seyed Kamal Masoudian Toroghi Toroghi

Vahid Khumaidovich Mezhidov Mezhidov

A Process for hydroconverting of a heavy hydrocarbonaceous feedstock comprising a catalyst to produce lower boiling hydrocarbon products. The method can be used for the high- boiling point residues of oil refining (asphaltene, the residues of vacuum and under pressure distillation of oil, and the useless and heavy materials of thermo catalytic processes), heavy oil, natural bitumen, and bitumen-containing sands. It can also be used in oil refinery industries for the production of gas, gasoline fractions, distillation gas oil, concentrate of ash containing metals and chemical fertilizers.

Process for hydroconverting of a heavy hydrocarbonaceous feedstock

The invention relates to a process for removing hydrogen sulfide and recovering sulfur from a gas stream, comprising the steps of: contacting said gas stream with an aqueous catalyst solution of a polyvalent metal redox catalyst in a contacting zone to absorb said hydrogen sulfide and form a reduced catalyst solution comprising reduced polyvalent metal redox catalyst and sulfur particles; oxidizing said reduced catalyst solution while removing sulfur particles to form said oxidized aqueous catalyst solution comprising polyvalent metal redox catalyst in an oxidized state with sulfur particles removed; and recovering sulfur by transferring at least one of said sulfur particles and foam to a separation zone; wherein a coagulating reagent is added to a feed of said separation zone prior to entering said separation zone to promote settlement of sulfur particles.

Process for removing sulfur particles from an aqueous catalyst solution and for removing hydrogen sulfide and recovering sulfur from a gas stream

The invention relates to a process for removing sulfur particles from an aqueous catalyst solution used to remove hydrogen sulfide from a gas stream (), comprising the steps of directing a flow of a suspension () comprising reduced catalyst solution and sulfur particles to an oxidizer zone (), where the catalyst solution is regenerated by contacting said suspension with a gas () containing oxygen; and removing sulfur from said suspension at least by gravity sedimentation at a bottom () of said oxidizer zone (). According to the invention a flow deflecting means () is disposed at least at an outlet () for the oxidized catalyst solution leaving said oxidizer zone () such as to prevent any turbulent state caused at least by a stream of oxidized catalyst solution leaving said oxidizer zone ().

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Tehran, Iran

Reza Hashemi