Method for separating straight chain hydrocarbons using zeolites having large crystals

A method for separating straight chain hydrocarbons from a hydrocarbon fraction having straight chain hydrocarbons, nonstraight chain hydrocarbons, and a sulfur compound, includes the steps of contacting the hydrocarbon fraction with a 5A zeolite having crystals of an average size larger than about...

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Bibliographische Detailangaben
Hauptverfasser:	LEWIS, PAUL H, NELSON, GERALD V
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CRACKING HYDROCARBON OILS FUELS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LUBRICANTS METALLURGY MINERAL WAXES ORGANIC CHEMISTRY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA TECHNICAL GASES CONTAINING CARBON MONOXIDE TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for separating straight chain hydrocarbons from a hydrocarbon fraction having straight chain hydrocarbons, nonstraight chain hydrocarbons, and a sulfur compound, includes the steps of contacting the hydrocarbon fraction with a 5A zeolite having crystals of an average size larger than about 700 angstroms which selectively absorbs the straight chain hydrocarbons to the substantial exclusion of the nonstraight chain hydrocarbons and sulfur compound. Large zeolite crystals are found to have a much longer useful life in this separation method than zeolite crystals having an average size of less than about 700 angstroms as measured along one edge of the zeolite crystal. The hydrocarbon fraction has more than about 800 wppm total sulfur including more than about 15 wppm mercaptan.