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AssigneeStandard Oil Company (Indiana)
InventorsRichard D. Petersen, Rodney L. Mieville
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There are disclosed a method for sulfiding a multi-metallic catalyst or a bi-metallic catalyst and a method for initiating the reforming of a petroleum hydrocarbon feedstock in a reforming reaction zone containing a multi-metallic catalyst or a bi-metallic catalyst. The method for sulfiding is employed when a hydrogen-rich gas containing light hydrocarbons is used in the sulfiding of the catalyst. The method comprises passing a stream of said gas over said catalyst at a temperature of about 350.degree. F. to about 470.degree. F., injecting a sulfur-containing compound into the stream of gas up-stream from said catalyst in order to provide a sulfur-carrying gas, and contacting said catalyst with said sulfur-carrying gas at said temperature for a time that is sufficient to provide a sulfur concentration on said catalyst of about 0.1 to about 2.5 moles of sulfur per mole of total active metal. A typical sulfur-containing compound is dimethyl sulfide.
A method for sulfiding a multi-metallic reforming catalyst when employing a hydrogen-rich gas containing light hydrocarbons during said sulfiding, the various metals of said catalyst comprising the total active metal of said catalyst, which method comprises passing a stream of said gas over said catalyst at a temperature of about 350.degree. F. to about 470.degree. F., injecting a sulfur-containing compound into said stream up-stream from said catalyst in order to provide a sulfur-carrying gas, and contacting said catalyst with said sulfur-carrying gas at said temperature for a time that is sufficient to provide a sulfur concentration on said catalyst of about 0.1 to about 2.5 moles of sulfur per mole of total active metal.
A method for sulfiding a multi-metallic reforming catalyst when employing a hydrogen-rich gas containing light hydrocarbons during said sulfiding, the various metal of said catalyst comprising the total active metal of said catalyst, which method comprises passing a stream of said gas over said catalyst at ambient temperature, increasing the temperature of said catalyst to a value of about 350.degree. F. to about 470.degree. F. while said gas is flowing over said catalyst, injecting a sulfur-containing compound into said stream up-stream from said catalyst in order to provide a sulfur-carrying gas, and contacting said catalyst with said sulfur-carrying gas at said temperature of about 350.degree. F. to about 470.degree. F. for a time that is sufficient to provide a sulfur concentration on said catalyst of about 0.1 to about 2.5 moles of sulfur per mole of total active metal.
A method for initiating the reforming of a petroleum hydrocarbon feedstock in a reforming reaction zone containing a bi-metallic catalyst or a multi-metallic catalyst, the various metals of said catalyst comprising the total active metal of said catalyst, which method comprises introducing a stream of hydrogen-rich gas containing light hydrocarbons into said reaction zone at a pressure of about 0 to about 1,000 psig, passing said stream through said reaction zone, adjusting the temperature in said reaction zone to a value of about 350.degree. F. to about 470.degree. F., injecting a sulfur-containing compound into said stream up-stream from said catalyst in order to provide a sulfur-carrying gas, contacting said catalyst with said said sulfur-carrying gas at said temperature and at a gas flow rate of about 0.25 to about 100 SCF of gas per pound of catalyst for a time that is sufficient to provide a sulfur concentration on said catalyst of about 0.1 to about 2.5 moles of sulfur per mole of total active metal, when sufficient sulfiding has occurred, discontinuing the injection of said sulfur-containing compound into said stream, adjusting the temperature, pressure, and hydrogen-rich-gas flow rate in said reaction zone to values that are to be used during the reforming operation, and introducing said feedstock into said reaction zone.
A method for initiating the reforming of a petroleum hydrocarbon feedstock in a reforming reaction zone containing a bi-metallic or a multi-metallic catalyst, the various metals of said catalyst comprising the total active metal of said catalyst, which method comprises introducing a stream of hydrogen-rich gas containing light hydrocarbons into said reaction zone at ambient temperature and a pressure of about 0 to about 1,000 psig, passing said stream through said reaction zone, raising the temperature of said reaction zone to a value of about 350.degree. F. to about 470.degree. F., injecting a sulfur-containing compound into said stream up-stream from said catalyst in order to provide a sulfur-carrying gas, contacting said catalyst with said sulfur-carrying gas at said temperature of about 350.degree. F. to about 470.degree. F. and at a gas flow rate of about 0.25 to about 100 SCF of gas per pound of catalyst for a time that is sufficient to provide a sulfur concentration on said catalyst of about 0.1 to about 2.5 moles of sulfur per mole of total active metal, when sufficient sulfiding has occurred, discontinuing the injection of said sulfur-containing compound into said stream, adjusting the temperature, pressure and hydrogen-rich-gas flow rate in said reaction zone to values that are to be used during the reforming operation, and introducing said feedstock into said reaction zone.
Dependencies are inferred from the claim text.