摘要:
Process for preparing 1,5,9-cyclododecatriene by contacting butadiene with a catalyst system resulting from the mixing of an aluminum composition of the structure Z(2.5 3.5)Al2Cl(3.5 2.5) wherein Z is selected from the group consisting of alkyl radicals containing from 2 to 4 carbon atoms and the phenyl radical; a titanium compound of the formula TiA4 wherein A is selected from the class consisting of Cl, Br, I and OR wherein R is an organic radical of from 1 to 20 carbon atoms; and a promoter for the catalyst system wherein the promoter is selected from the group consisting of water, oxygen and oxygen-containing organic compounds, at a temperature in the range of 20* to 120*C. and at a pressure of 0.5 to 50 atmospheres and recovering cyclododecatriene-1,5,9 along with by-products 1,5-cyclooctadiene and 4-vinylcyclohexene, the improvement which comprises adding an iodide-containing composition or compound selected from the group consisting of Z(2.5 3.5)Al2I(3.5 2.5), Z2AlI, ZAlI2, and I2 wherein Z is selected from the group consisting of alkyl radicals containing from 2 to 4 carbon atoms and the phenyl radical, the molar ratio of iodine or iodide-containing composition or compound to aluminum composition being in the range of 0.05:10 to 5:10.
摘要:
A trimetallic acidic catalytic composite, comprising a combination of catalytically effective amounts of a platinum or palladium component, an iridium component, a germanium component and a halogen component with a porous carrier material, is disclosed. The principal utility of this composite is in the conversion of hydrocarbons, particularly in the reforming of a gasoline fraction. A specific example of the disclosed catalytic composite is a combination of catalytically effective amounts of a platinum component, an iridium component, a germanium component, and a chloride component with an alumina carrier material.
摘要:
Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a platinum-free catalytic composite containing catalytically effective amounts of palladium, iridium and halogen combined with a porous carrier material. A specific example of the type of hydrocarbon conversion process disclosed is a process for the catalytic reforming of a gasoline fraction in the presence of hydrogen, which comprises contacting the gasoline fraction and hydrogen, at reforming conditions, with a platinum-free combination of catalytically effective amounts of a palladium component, an iridium component and a chlorine component with a gamma-alumina carrier material.
摘要:
A CONVENTIONAL NAPHTHENE DEHYDROGENATION CATALYST, SUCH AS A PLATINUM-HALOGEN-ALUMINA CATALYST, IS USED IN THE INITIAL ZONE OR REACTORS IN A CATALYTIC REFORMING PROCESS; THE TAIL ZONE OR REACTORS CONTAINS A SUPPORTED GROUP VIII POLYMETALLIC CATALYST WITH PLATINUM AS ONE OF THE METALLIC COMPONENTS. IN A PREFERRED EMBODIMENT, THE TAIL ZONE CONTAINS A PLATINUM-IRIDIUM CATALYST ONE A POROUS SUPPORT SUCH AS ALUMINA. IN THE TAIL REACTORS, CONVERSION OF PARAFFINS IS OF PRIMARY IMPORTANCE, ALONG WITH DEALKYLATION OF ALKYLBENEZENES; IN THE INITIAL REACTORS, THE PREDOMINANT REACTION IS THE CONVERSION OF NAPHTTHENES TO AROMATICS. THE COMBINATION PROCESS RESULTS IN THE FORMATION OF A SIGNIFICANTLY GREATER OCTANE NUMBER PRODUCT THAN IS OBTAINED IN A CONVENTIONAL REOFMING PROCESS IN WHICH PLATINUM-ALUMINA CATALYST IS USED THROUGHOUT.
摘要:
A DEACTIVATED HYDROCARBON CONVERSION CATALYST, WHICH IS A COMBINATION OF A PLATINUM GROUP COMPONENT, A GROUP IV-A METALLIC COMPONENT, AND A HALOGEN COMPONENT WITH A POROUS CARRIER MATERIAL AND WHICH HAS BEEN DEACTIVATED BY DEPOSITION OF CARBONACEOUS MATERIALS THEREON DURING A PREVIOUSLY 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 HALOGEN OR A HALOGEN-CONTAINING COMPOUND, H2O, AND A RELATIVELY SMALL AMOUNT OF O2, (2) TREATING THE RESULTING PARTIALLY REGENERATED CATALYST AT A RELATIVELY HIGHER TEMPERATURE WITH A GAS STREAM CONTAINING A HALOGEN OR A HALOGEN-CONTAINING COMPOUND, H2O, AND A RELATIVELY HIGHER AMOUNT OF O2, (3) PURGING O2 AND H2O FROM CONTACT WITH THE RESULTING CATALYST, AND (4) SUBJECTING THE RESULTING CATALYST TO CONTACT WITH A SUBSTANTIALLY SULFUR-FREE HYDROGEN STREAM AT REDUCTION CONDITIONS. KEY FEATURES OF THE DISCLOSED METHOD ARE: (1) PRESENCE OF WATER AND HALOGEN IN THE GAS STREAM USED IN THE CARBON-BURNING STEP AND IN THE OXYGEN-TREATING STEP, (2) CAREFUL CONTROL OF THE TEMPERATURE DURING EACH STEP, (3) MAINTENANCE OF THE HALOGEN CONTENT OF THE CATALYST AT A RELATIVELY HIGH LEVEL DURING THE ENTIRE REGENERATION PROCEDURE, AND (4) CAREFUL CONTROL OVER THE COMPOSITION OF THE GAS STREAMS USED IN THE VARIOUS STEPS THEREOF.
摘要:
ISOMERIZABLE HYDROCARBONS ARE ISOMERIZED USING A CATALYTIC COMPOSITE COMPRISING A COMBINATION OF A PLATINUM GROUP COMPONENT, A GROUP IV-A METALLIC COMPONENT, AND A NICKEL COMPONENT WITH A POROUS CARRIER MATERIAL. A CATALYTIC COMPOSITE COMPRISING A PLATINUM GROUP COMPONENT, A GROUP IV-A METALLIC COMPONENT, A NICKEL COMPONENT AND A FRIEDEL-CRAFTS METAL HALIDE COMPONENT COMBINED WITH A REFRACTORY INORGANIC OXIDE IS ALSO DISCLOSED.
摘要:
The present invention is directed to a method of preparing a synthetic crystalline material, designated as JMZ-12, with a framework built up by the disorder AEI and CHA structures, substantially free of framework phosphorous and prepared preferably in the absence of halides such as fluoride ions. Such method comprises the step of heating a reaction mixture under crystallization conditions for a sufficient period to form a disordered zeolite having both CHA and AEI topologies, wherein the reaction mixture comprises at least one source of aluminum, at least one source of silicon, a source of alkaline or alkaline-earth cations, and a structure directing agent containing at least one source of quaternary ammonium cations and at least one source of alkyl-substituted piperidinium cations in a molar ratio of 0.20 to about 1.4. The resulting zeolites are useful as catalysts, particularly when used in combination with exchanged transition metal(s) and, optionally, rare earth metal(s).