# US 5,348,928 A · Selective hydrotreating catalyst > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,348,928 A - Document ID: US5348928A - Status: Granted - Kind: A - Application number: 08/059,234 - Filed: 1993-05-06 - Granted: 1994-09-20 - Earliest claimed: 1991-04-22 - Assignees: Amoco Corporation - Inventors: Simon G. Kukes; P. Donald Hopkins; Riitta L. A. Olleandorff; Pablo D. Hendler; Cynthia D. Ontiveros; Don M. Washecheck - Web page: https://patentgrep.com/patent/US5348928A ## CPC - B01J 23/85: Chromium, molybdenum or tungsten - C10G 45/08: in combination with chromium, molybdenum, or tungsten metals, or compounds thereof - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## Abstract A catalyst and method of making a catalyst are provided for the selective hydrotreating of a selective hydrotreating feedstock comprising reacting the feedstock with hydrogen at hydrotreating conditions in the presence of a catalyst comprising a hydrogenation component and a support component. The hydrogenation component comprises a Group VIB metal component and a Group VIII metal component wherein the Group VIB metal component is present in an amount ranging from about 4 wt % to about 20 wt % and the Group VIII metal component is present in an amount ranging from about 0.5 wt % to about 10 wt %, both calculated as oxides and based on the total catalyst weight. The support component comprises from about 0.5 wt % to about 50 wt % of a magnesium component and from about 0.02 wt % to about 10 wt % of an alkali metal component, both calculated as oxides and based on the total catalyst weight. The present invention provides a process, catalyst, and method of making a catalyst resulting in higher selective hydrotreating feedstock octane at high levels of desulfurization, among numerous other benefits. ## Claims ### Claim 1 A selective hydrotreating catalyst suitable for hydrotreating cracked naphtha comprising a hydrogenation component and a support component, said hydrogenation component comprising a molybdenum component and a cobalt component wherein the molybdenum component is present in an amount ranging from about 4 wt % to about 10 wt % and the cobalt component is present in an amount ranging from about 0.5 wt % to about 3 wt %, both calculated as oxides and based on the total catalyst weight, and said support component comprising from about 0.5 wt % to about 50 wt % of a magnesium component and from about 0.3 wt % to about 10 wt % of a sodium component, both calculated as oxides and based on the total catalyst weight, said catalyst having a surface area of not less than 268 m.sup.2 /gm. ### Claim 2 (depends on 1) The catalyst of claim 1 wherein said catalyst support comprises gamma alumina. ### Claim 3 (depends on 2) The catalyst of claim 2 wherein said gamma alumina is present as substantially spherical gamma alumina comprising from about 0.2 wt % to about 0.5 wt % sodium. ### Claim 4 (depends on 1) The catalyst of claim 1 wherein said catalyst has an average pore diameter of not more than 300 Angstroms. ### Claim 5 (depends on 1) The catalyst of claim 1 wherein said catalyst has a crush strength of at least 8 pounds for cylindrical extrudate particle diameters of 1/16 inches. ### Claim 6 (depends on 1) The catalyst of claim 1 wherein said catalyst has an abrasion loss of less than 2 percent. ### Claim 7 A method for preparing a selective hydrotreating catalyst suitable for hydrotreating cracked naphtha, comprising: preparing a first aqueous composition comprising dissolved Group VIB and Group VIII metal compounds; mixing said first aqueous composition with a refractory inorganic oxide and forming a paste comprising Group VIB and Group VIII metals; converting said paste into particulate comprising at least one form selected from the group consisting of pills, powder, pellets, and extrudates; preparing a second aqueous composition comprising dissolved magnesium and alkali metal components; combining said second aqueous composition with said particulate and producing aqueous particulate; and calcining said aqueous particulate to produce said selective hydrotreating catalyst. ### Claim 8 (depends on 7) The method of claim 7 wherein said first and second aqueous compositions comprise a predetermined amount of water determined using incipient wetness techniques. ### Claim 9 (depends on 7) The method of claim 7 wherein said forming step comprises extruding said paste into extrudates, said extrudates having a particle diameter ranging from about 1/32 inches to about 1/4 inches. ### Claim 10 (depends on 7) The method of claim 7 wherein said Group VIB compound comprises molybdenum and said Group VIII compound comprises cobalt. ### Claim 11 (depends on 7) The method of claim 7 wherein said alkali metal component comprises sodium. ### Claim 12 (depends on 7) The method of claim 7 wherein said refractory inorganic oxide comprises alumina. ### Claim 13 (depends on 7) The method of claim 7 wherein said refractory inorganic oxide is substantially spherical gamma alumina comprising from about 0.2 wt % to about 0.5 wt % sodium. ### Claim 14 (depends on 7) The method of claim 7 wherein said calcination step is performed at a temperature in the range of from about 482.degree. F. to about 1202.degree. F. ### Claim 15 (depends on 7) The method of claim 7 wherein said Group VIB compound comprises a molybdenum component present in an amount ranging from about 4 percent by weight to about 10 percent by weight, said Group VIII compound comprises a cobalt component present in an amount ranging from about 0.5 percent to about 5.0 wt %, said magnesium component is present in an amount ranging from about 0.5 wt % to about 50.0 wt %, and said alkali metal component comprises a sodium component present in an amount ranging from about 0.1 wt % to about 5.0 wt %, each calculated as a percentage of said selective hydrotreating catalyst.