Process of presulfurizing catalysts for hydrocarbons treatment

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Sulfur or compound containing same

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502168, 502216, 502219, 502221, 502 31, 502 22, 502222, 502223, B01J 2702, B01J 3102, B01J 3700

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active

045309175

ABSTRACT:
Catalysts for the treatment of hydrocarbons are presulfurized or presulfided ex-situ, in the absence of hydrogen, by means of a polysulfide of the general formula R--S.sub.(n) --R' wherein n is an interger from 3 to 20 and R and R' are each an organic radical having from 1 to 150 carbon atoms, R' being optionally a hydrogen atom, the so-presulfurized or presulfided catalysts being subsequently activated with hydrogen during their use in the hydrotreatment process of a hydrocarbon charge, i.e. in-situ. An aldehyde or an alcohol or a ketone, an ether or an organic acid, may be added, as promoter, to the polysulfide.

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