Phillips Petroleum Company

Thomas T Davis

Simon G Kukes

Karlheinz K Brandes

Howard F Efner

Daniel M Coombs

Robert J Hogan

Donald C Tabler

Lewis E Drehman

Jerald A Howell

Marvin C Burk

At least one decomposable molybdenum compound selected from the group consisting of molybdenum dithiophosphates and molybdenum dithiocarbamates is mixed with a hydrocarbon-containing feed stream. The hydrocarbon-containing feed stream containing such decomposable molybdenum compound is then contacted in a hydrovisbreaking process with hydrogen under suitable hydrovisbreaking conditions.

Hydrovisbreaking process for hydrocarbon containing feed streams

A composition of matter is prepared by a process comprising the steps of impregnating a alumina-containing support material with a thiosulfate (preferably ammonium thiosulfate), drying the thus impregnated material, impregnating the dried material with a transition metal compound, drying and calcining the transition metal impregnated material. This composition of matter is used as catalyst composition for hydrogenating unsaturated hydrocarbon compounds, and as catalyst composition for hydrotreating hydrocarbon-containing feed streams (in particular heavy oils) which contain metal and sulfur compounds as impurities. In another embodiment, a hydrotreating process comprises contacting hydrocarbon-containing feed stream (in particular heavy oils), which contains compounds of sulfur and metals, in the presence of a fixed catalyst bed comprising (X) at least one layer of impregnated substantially spherical alumina-containing particles, which have been prepared by a process comprising the steps of impregnating a specific starting material with (NH.sub.4).sub.2 S.sub.2 O.sub.3 and then heating the thus impregnated material at about 500.degree.-900.degree. C. for improved crush strength retention. In a preferred embodiment, the fixed catalyst bed further comprises at least one layer (Y) of catalyst particles comprising a refractory inorganic carrier and at least one hydrogenation promoter. A composition of matter comprising the impregnated, spherical alumina-containing particles described above, and a process for preparing them are also provided.

Impregnated alumina-containing material

Hydrogenation process of unsaturated hydrocarbons employing impregnated

A composition of matter is prepared by a process comprising the steps of impregnating a alumina-containing support material with a thiocyanate compound (preferably ammonium thiocyanate), drying the thus impregnated material, impregnating the dried material with a transition metal compound, drying and calcining the transition metal impregnated material. This composition of matter is used as catalyst composition for hydrotreating of hydrocarbon-containing feed streams (in particular heavy oils) which contain metal and sulfur compounds as impurities. In another embodiment, a hydrotreating process comprises contacting hydrocarbon-containing feed stream (in particular heavy oils), which contains compounds of sulfur and metals, in the presence of a fixed catalyst bed comprising at least one layer (X) of impregnated substantially spherical alumina-containing particles which have been prepared by a process comprising the steps of impregnating a specific starting material with NH.sub.4 SCN and then heating the thus impregnated material at about 500.degree.-900.degree. C. for improved crush strength retention. In a preferred embodiment, the fixed catalyst bed further comprises at least one layer (Y) of catalyst particles comprising a refractory inorganic carrier and at least one hydrogenation promoter. A composition of matter comprising the impregnated, spherical alumina-containing particles described above, and a process for preparing them are also provided.

Pretreated alumina containing material and process for its preparation

A composition of matter is prepared by a process comprising the steps of impregnating a alumina-containing support material with a thiocyanate (preferably ammonium thiocyanate), drying the thus impregnated material, impregnating the dried material with a transition metal compound, drying and calcining the transition metal impregnated material. This composition of matter is used as catalyst composition for hydrotreating of hydrocarbon-containing feed streams (in particular heavy oils) which contain metal and sulfur compounds as impurities. In another embodiment, a hydrotreating process comprises contacting hydrocarbon-containing feed stream (in particular heavy oils), which contains compounds of sulfur and metals, in the presence of a fixed catalyst bed comprising (X) at least one layer of impregnated substantially spherical alumina-containing particles which have been prepared by a process comprising the steps of impregnating specific starting material with NH.sub.4 SCN and then heating the thus impregnated material at about 500.degree.-900.degree. C. for improved crush strength retention. In a preferred embodiment, the fixed catalyst bed further comprises at least one layer (Y) of catalyst particles comprising a refractory inorganic carrier and at least one hydrogenation promoter. A composition of matter comprising the impregnated, spherical alumina-containing particles described above, and a process for preparing them are also provided.

Hydrotreating process employing a pretreated alumina containing material

A composition of matter is prepared by a process comprising the steps of impregnating a alumina-containing support material with a thiosulfate (preferably ammonium thiosulfate), drying the thus impregnated material, impregnating the dried material with a transition metal compound, drying and calcining the transition metal impregnated material. This composition of matter is used as catalyst composition for hydrogenating unsaturated hydrocarbon compounds, and as catalyst composition for hydrotreating of hydrocarbon-containing feed streams (in particular heavy oils) which contain metal and sulfur compounds as impurities. In another embodiment, a hydrotreating process comprises contacting hydrocarbon-containing feed stream (in particular heavy oils), which contains compounds of sulfur and metals, in the presence of a fixed catalyst bed comprising (X) at least one layer of impregnated substantially spherical alumina-containing particles, which have been prepared by a process comprising the steps of impregnating a specific starting material with (NH.sub.4).sub.2 S.sub.2 O.sub.3 and then heating the thus impregnated material at about 500.degree.-900.degree. C. for improved crush strength retention. In a preferred embodiment, the fixed catalyst bed further comprises at least one layer (Y) of catalyst particles comprising a refractory inorganic carrier and at least one hydrogenation promoter. A composition of matter comprising the impregnated, spherical alumina-containing particles described above, and a process for preparing them are also provided.

Hydrotreating process employing an impregnated alumina containing

At least one decomposable molybdenum dithiocarbamate compound is mixed with a hydrocarbon-containing feed stream. The hydrocarbon-containing feed stream containing such decomposable molybdenum dithiocarbamate compound is then contacted in a hydrofining process with a catalyst composition comprising a support selected from the group consisting of alumina, silica and silica-alumina and a promoter comprising at least one metal selected from Group VIB, Group VIIB and Group VIII of the Periodic Table. The introduction of the decomposable molybdenum dithiocarbamate compound may be commenced when the catalyst is new, partially deactivated or spent with a beneficial result occurring in each case.

Hydrofining process for hydrocarbon containing feed streams

At least one decomposable molybdenum dithiophosphate compound is mixed with a hydrocarbon-containing feed stream. The hydrocarbon-containing feed stream containing such decomposable molybdenum dithiophosphate compound is then contacted in a hydrofining process with a catalyst composition comprising a support selected from the group consisting of alumina, silica and silica-alumina and a promoter comprising at least one metal selected from Group VIB, Group VIIB and Group VIII of the Periodic Table. The introduction of the decomposable molybdenum dithiophosphate compound may be commenced when the catalyst is new, partially deactivated or spent with a beneficial result occuring in each case.

A tri-state buffer having the output thereof electrically connected to the input thereof is utilized to provide an active termination for a transmission line carrying data, addresses, commands or other information. The tri-state buffer is enabled by a strobe signal so as to insure that the transmission line will be stable through the time period of the strobe signal when data, commands, addresses or other information is being transferred. A tri-state buffer having the output thereof electrically tied through a resistive element to the input thereof is utilized to provide an active termination for a transmission line carrying strobe-type signals. The tri-state buffer is always in an enabled state. The resistance element is used to help match the line impedance of the transmission line. This reduces the load on the strobe signal source and also reduces transmission line ringing due to impedance mismatches.

Active termination for a transmission line

An improved process for removing metals from heavy oils and other hydrocarbon feed streams is disclosed. The process includes adding elemental phosphorus to the hydrocarbon feed stream under suitable demetallizing conditions. It is believed that elemental phosphorus reacts with the metals contained in the hydrocarbon containing feed stream to form oil insoluble compounds that can be removed from the hydrocarbon containing feed stream by any conventional method, such as filtration, centrifugation, or decantation.

Demetallization of heavy oils

A control panel which provides an interface to a digital computer, and which comprises at least a data input device such as a keyboard and a data output device such as an alphanumeric display or a light emitting diode display, is tested without the use of the digital computer. The digital computer is disconnected or bypassed and the timing and other functions of the computer are simulated to enable an independent test of the data input device and the data output device which make up at least a part of the control panel.

Control panel self-test

Acetylenic compounds are selectively removed from hydrocarbon mixtures containing same by oxidation in the presence of a copper chromite catalyst. In one embodiment, acetylenic compounds are selectively removed from streams containing C.sub.4 unsaturated hydrocarbons containing same by contacting oxygen and the stream with a catalyst of copper, chromium, and oxygen under oxidizing conditions.

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Bartlesville, OK, United States of America

Thomas T Davis