Abstract:
Dehydrogenatable hydrocarbons are dehydrogenated by contacting them at dehydrogenation conditions with a nonacidic catalytic composite comprising a combination of catalytically effective amounts of a platinum or palladium component, an iridium component, a Group IVA metallic component and an alkali or alkaline earth component with a porous carrier material. A specific example of the nonacidic, multimetallic catalytic composite disclosed herein is a combination of a platinum component, an iridium component, a germanium component and an alkali or alkaline earth component with an alumina carrier material. The amounts of the catalytically active components contained in this last composite are, on an elemental basis, 0.01 to 2 wt. % platinum, 0.01 to 2 wt. % iridium, 0.01 to 5 wt. % germanium and 0.1 to 5 wt. % of the alkali or alkaline earth metal.
Abstract:
1. A PROCESS FOR REFORMING A GASOLINE FRACTION WHICH COMPRISES CONTACTING THE GASOLINE FRACTION, AT A TEMPERATURE OF ABOUT 800 TO ABOUT 1100* F., A PRESSURE OF ABOUT 0 TO ABOUT 1000 P.S.I.G., A LIQUID HOURLY SPACE VELOCITY OF ABOUT 0.1 TO ABOUT 10 HR.-1, AND A MOLE RATIO OF HYDROGEN TO HYDROCARBON OF ABOUT 1:1 TO 20:1, WITH A CATALYTIC COMPOSITE OF A HALOGEN COMPONENT, A PLATINUM OR PALLADIUM COMPONENT, AN IRIDIUM COMPONENT AND A NICKEL COMPONENT ON A POROUS CARRIER MATERIAL, SAID COMPOSITE CONTAINING, ON AN ELEMENTAL BASIS, ABOUT 0.1 TO ABOUT 3.5 WT. PERCENT HALOGEN, ABOUT 0.01 TO ABOUT 2 WT. PERCENT PLATINUM OR PALLADIUM, ABOUT 0.01 TO ABOUT 2 WT. PERCENT IRIDIUM AND ABOUT 0.01 TO ABOUT 5 WT. PERCENT NICKEL.
Abstract:
AN IMPROVED METHOD OF OPERATION IS PROVIDED FOR A CATALYTIC, LOW PRESSURE PROCESS FOR CONTINUOUSLY REFORMING A HYDROCARBON CHARGE STOCK BOILING IN THE GASOLINE RANGE IN ORDER TO PRODUCE A HIGH OCTANE EFFLUENT STREAM IN WHICH PROCESS THE HYDROCARBON CHARGE STOCK AND HYDROGEN ARE CONTINUOUSLY CONTACTED IN A REFORMING ZONE WITH A REFORMING CAALYST CONTAINING A CATALYTICALLY EFFECTIVE AMOUNT OF A PLATINUM GROUP METAL AT REFORMING CONDITIONS INCLUDING A PRESSURE OF 25 OT 350 P.S.I.G. THE IMPROVED METHOD OF OPERATION INVOLVES CONTINUOUSLY ADDING METHANE TO THE REFORMING ZONE IN AN AMOUNT SUFFICIENT TO RESULT IN A MOLE RATIO OF METHANE TO HYDROGEN ENTERING THE REFORMING ZONE OF ABOUT 0.4:1 TO ABOUT 10:1. MOREOVER, THE METHANE ADDITION IS COMMENCED AT START-UP OF THE PROCESS AND CONTINUED THROUGHOUT THE DURATION OF THE REFORMING RUN. THE PRINCIPAL ADVANTAGE ASSOCIATED WITH THIS IMPROVED METHOD OF OPERATION IS INCREASED STABILITY OF THE REFORMING CATALYST AND PARTICULARLY, INCREASED TEMPERATURE STABILITY AT OCTANE.
Abstract:
A deactivated hydrocarbon conversion catalyst, which is a combination of a platinum group component, a group IVA metallic component, and a halogen component with a porous carrier material and which has been deactivated by a deposition of carbonaceous materials thereon during a previous contacting with a hydrocarbon charge stock at an elevated temperature, is regenerated by the sequential steps of: (1) burning carbon therefrom at a relatively low temperature with a gas stream containing H2O and a small amount of O2, (2) treating with a gas stream containing H2O and a small amount of O2 at a relatively high temperature, (3) treating with a gas stream containing H2O and a large amount of O2 at the relatively high temperature, (4) treating with a gas stream containing halogen or a halogen-containing compound and water, (5) purging O2 and H2O from the resulting catalyst and (6) reducing with a dry hydrogen stream. Key features of the resulting method are: (1) presence of water in the gas streams used in all steps except the purging and reduction steps, (2) careful control of the inlet temperature used during each step, (3) adjustment of halogen content of the catalyst after the carbon-burning step and prior to the reduction step, (4) careful control over the composition of the gas streams used in the various steps thereof and (5) exclusion of sulfur compounds from all gas streams utilized.
Abstract:
A deactivated hydrocarbon conversion catalyst, which is a combination of catalytically effective amounts of a platinum group component, a tin component and a halogen component with a porous carrier material, which is free of labile sulfur and which has been deactivated by a deposition of carbonaceous material thereon during a previous contacting with a hydrocarbon charge stock at hydrocarbon conversion conditions, is regenerated by the sequential steps of: (1) burning carbon from the deactivated catalyst at a relatively low temperature with a substantially sulfur-free first gaseous mixture containing relatively small amounts of oxygen, H2O and HCl; (2) treating the resulting catalyst at a relatively high temperature with a second gaseous mixture containing O2, H2O and HCl; (3) purging oxygen from contact with the resulting catalyst; and (4) reducing the resulting catalyst by contacting with a substantially sulfur-free third gaseous mixture containing hydrogen and small amounts of H2O and HCl. Key features of the regeneration method involve: the presence of both H2O and HCl in the gaseous mixtures used in the carbon-burning, oxygen-treating and reduction steps; the use of sulfur-free gaseous mixtures in all of these steps; and the careful control of the mole ratio of H2O to HCl employed in each of these gaseous mixtures.
Abstract:
A process for hydrotreating hydrocarbons and mixtures of hydrocarbons utilizing a catalytic composite of a porous carrier material, a Group VIII noble metal component and a germanium component. Applicable to charge stocks containing sulfurous compounds and aromatic hydrocarbons, the hdrotreating conditions can be controlled to effect a particular end result including the ring-opening of cyclic hydrocarbons, desulfurization, denitrification, selective olefin saturation, etc.
Abstract:
HYDROCARBONS ARE CONVERTED BY CONTACTING THEM AT HYDROCARBON CONVERSION CONDITIONS WITH A CATALYTIC COMPOSITE COMPRISING A COMBINATION OF CATALYTICALLY EFFECTIVE AMOUNTS OF A PLATINUM COMPONENT, A REHENIUM COMPONENT AND A GERMANIUM COMPONENT WITH A POROUS CARRIER MATERIAL. A SPECIFIC EXAMPLE OF THE DISCLOSED HYDROCARBON CONVERSION PROCESSES IS A PROCESS FOR THE CATALYTIC REFORMING OF A GASOLINE FRACTION WHICH COMPRISES CONTACTING THE GASOLINE FRACTION AND HYDROGEN WITH A CATALYTIC COMPOSITE, COMPRISING A COMBINATION OF CATALYTICALLY EFFECTIVE AMOUNTS OF A PLATINUM COMPONENT, A RHENIUM COMPONENT, A GERMANIUM COMPONENT AND A HALOGEN COMPONENT WITH AN ALUMINA CARRIER MATERIAL, AT REFORMING CONDITIONS.
Abstract:
DEHYDROGENATABLE HYDROCARBONS ARE DEHYDROGENATED BY CONTACTING THEM AT DEHYDROGENATION CONDITIONS WITH A CATALYTIC COMPOSITE COMPRISING A COMBINATION OF CATALYTICALLY EFFECTIVE AMOUNTS OF A PLATINUM COMPONENT, AN IRIDIUM COMPONENT AND AN ALKALI OR ALKALINE EARTH METAL COMPONENT WITH A POROUS CARRIER MATERIAL IN A MANNER SUCH THAT THE PLATINUM AND IRIDIUM COMPONENTS ARE UNIFORMLY DISPERSED IN THE CARRIER MATERIAL AND ARE PRESENT THEREIN IN AMOUNTS SELECTED TO RESULT IN AN ATOMIC RATIO OF IRIDIUM TO PLATINUM OF ABOUT 0.5;1 TO ABOUT 185;1. MOREOVER, THE CATALYTIC COMPOSITE IS PREPARED BY: (A) FORMING A SULFUR-FREE COMPOSITE OF PLATINUM, IRIDIUM AND AN ALKALI OR ALKALINE EARTH METAL WITH A POROUS CARRIER MATERIAL; (B) SUBJECTING THE RESULTING COMPOSITE TO A SUBSTANTIALLY SULFUR-FREE OXIDATION STEP; AND (C) CONTACTING THE RESULTING OXIDIZED COMPOSITE WITH A SULFUR-FREE HYDROGEN STREAM AT CONDITIONS SELECTED TO RESULT IN THE REDUCTION OF SUBSTANTIALLY ALL OF THE PLATINUM AND IRIDIUM COMPONENTS TO THE CORRESPONDING ELEMENTAL METALLIC STATE.
Abstract:
A PROCESS FOR HYDROCARBONS AND MIXTURES OF HYDROCARBONS UTILIZING A CATALYSTIC COMPOSITE OF A POROUS CARRIER MATERIAL , A GROUP VIII NOBLE METAL COMPONENT AND A GERMANIUM COMPONENT. APPLICABLE TO CHARGE STOCKS CONTAINING SULFUROUS COMPOUNDS AND AROMATIC HYDROCARBONS, HE HYDROTREATING CONDITIONS CAN BE CONTROLLED TO EFFECT A PARTICULAR END RESULT INCLUDING THE RING-OPENING OF CYCLIC HYDROCARBONS, DESULFURIZATION, DENITRIFICATION, SELECTIVE OLEFIN SATURATION, ETC.
Abstract:
1. A CATALYTIC COMPOSITE COMPRISING A COMBINATION OF CATALYTICALLY EFFECTIVE AMOUNTS OF PLATINUM METAL, IRIDIUM METAL, AN ALKALI OR ALKALINE EARTH METAL OXIDE AND FROM ABOUT 0.05 TO ABOUT 0.5 WT. PERCENT SULFUR WITH A POROUS CARRIER MATERIAL, WHEREIN THE PLATINUM AND IRIDIUM ARE UNIFORMLY DISPERSED IN THE CARRIER MATERIAL, WHEREIN THE PLATINUM AND IRIDIUM ARE PRESENT IN AMOUNTS SELECTED TO RESULT IN AN ATOMIC RATIO OF IRIDIUM TO PLATINUM OF ABOUT 0.5:1 TO ABOUT 1.5:1 AND WHEREIN THE COMPOSITE IS PREPARED BY THE STEPS OF: (A) FORMING A SULFUR-FREE COMPOSITE OF OXIDAZABLE PLATINUM, IRIDIUM AND ALKALI OR ALKALINE EARTH METAL COMPOUNDS WITH A POROUS CARRIER MATERIAL AND UNIFORMLY DISPERSING THE IRIDIUM AND PLATINUM COMPOUNDS IN THE CARRIER MATERIAL; (B) SUBJECTING THE RESULTING COMPOSITE TO CONTACT WITH A SULFUR-FREE, OXYGEN-CONTAINING GAS STREAM AT OXIDATION CONDITIONS SELECTED TO OXIDIZE THE PLATINUM, IRIDIUM AND ALKALI OR ALKALINE EARTH METAL COMPOUNDS TO OXIDES; (C) CONTACTING THE RESULTING OXIDIZED COMPOSITE WITH A SULFUR-FREE HYDROGEN STREAM AT REDUCTION CONDITIONS SELECTED TO REDUCE BOTH THE PLATINUM AND IRIDIUM OXIDES TO THE ELEMENTAL METALLIC STATE; AND THEREAFTER (D) PRESULFIDING THE COMPOSITE TO INCORPORATE WHEREIN FROM ABOUT 0.05 TO ABOUT 0.5 WT. PERCENT SULFUR.