초록 ▼

Self-heating characteristics of a spontaneously combustible catalyst are reduced by treating spontaneously combustible catalysts with oxygen-containing hydrocarbons having at least 12 carbon atoms. The treatment is particularly suitable for reducing the self-heating characteristics of sulfidable met

Self-heating characteristics of a spontaneously combustible catalyst are reduced by treating spontaneously combustible catalysts with oxygen-containing hydrocarbons having at least 12 carbon atoms. The treatment is particularly suitable for reducing the self-heating characteristics of sulfidable metal oxide(s)-containing catalysts, presulfurized catalysts, presulfided catalysts or reduced catalysts. When applied to sulfur-containing catalysts, the treatment gives a catalyst that has suppressed self-heating properties without substantially compromising sulfur retention or activity. Further hydrocracking catalysts treated by the oxygen-containing hydrocarbons give improved product yield. Further, a method of safely unloading a catalyst from a reactor is provided where the catalyst in the reactor is treated with a liquid mixture containing oxygen-containing hydrocarbon having at least 12 carbon atoms to wet the catalyst.

대표청구항 ▼

[ What is claimed is:] [1.] A process for hydrocracking hydrocarbon streams comprising contacting the streams in the presence of hydrogen with a hydrocracking catalyst containing sulfides of metals of Group VIB and/or Group VIII of the Periodic Table on a porous support at a temperature within the r

[ What is claimed is:] [1.] A process for hydrocracking hydrocarbon streams comprising contacting the streams in the presence of hydrogen with a hydrocracking catalyst containing sulfides of metals of Group VIB and/or Group VIII of the Periodic Table on a porous support at a temperature within the range of 100.degree. C. to about 500.degree. C., said hydrocracking catalyst is prepared by the process comprising treating a presulfurized catalyst with a substance comprising at least one oxygen-containing hydrocarbon having at least 20 carbon atoms and have an iodine value of above 60 then liquid activating the thus-treated presulfurized catalyst by heating the treated presulfurized catalyst in the presence of hydrogen and at least one hydrocarbon, said hydrocarbon having a boiling point of above about 35.degree. C. at atmospheric pressure, said activiation is carreid out at a temperature within the range of about 25.degree. C. to about 430.degree. C., hydrogen partial pressure within the range of about 50 psig to about 3000 psig and Liquid Hourly Space Velocity of from about 0.1 to about 20 hr.sup.-1 to provide a hydrocracking catalyst.