FIELD: petrochemical process catalysts.
SUBSTANCE: little amount of an o-phthalic acid ester is added to sulfurization agent used for catalyst sulfurization and selected from starting material for hydrodesulfurization, carbon bisulfide, organic sulfide, disulfide or polysulfide, thiophene compound, and sulfur-containing olefin.
EFFECT: increased catalytic activity.
10 cl, 2 tbl, 5 ex
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