초록 ▼

A naphtha hydrorefining process is initiated by contacting an olefinic naphtha feed at hydrorefining conditions including a pressure below about 200 psig, with hydrogen and a catalyst that has been partially deactivated by treating a fresh or a regenerated catalyst with a substantially non-metals co

A naphtha hydrorefining process is initiated by contacting an olefinic naphtha feed at hydrorefining conditions including a pressure below about 200 psig, with hydrogen and a catalyst that has been partially deactivated by treating a fresh or a regenerated catalyst with a substantially non-metals containing hydrocarbonaceous oil in the presence of hydrogen under conditions sufficient to decrease the hydrogenation activity of the catalyst.

대표청구항 ▼

A method for starting up a naphtha hydrorefining process for removing sulfur contaminants from said naphtha, which comprises: contacting naphtha containing said sulfur contaminants and at least 10 volume percent olefins with a hydrogen-containing gas and with a partially deactivated catalyst under h

A method for starting up a naphtha hydrorefining process for removing sulfur contaminants from said naphtha, which comprises: contacting naphtha containing said sulfur contaminants and at least 10 volume percent olefins with a hydrogen-containing gas and with a partially deactivated catalyst under hydrorefining conditions including a pressure ranging from about 60 psig to less than 200 psig, and at a temperature ranging from about 400°to about 800°F., said catalyst having been deactivated by contacting a fresh or a regenerated hydrorefining catalyst having hydrogenation and desulfurization activity with a substantially non-metals containing hydrocarbonaceous oil in the presence of a hydrogen-containing gas under conditions and for a time sufficient to decrease the hydrogenation activity of said fresh or regenerated catalyst.