PROCESS FOR PREPARING A BASE OIL HAVING A REDUCED CLOUD POINT

The present invention relates to a process for preparing a base oil fraction having a reduced cloud point from a hydrocarbon feed which is derived from a Fischer-Tropsch process, the process comprises the steps of: (a) providing a hydrocarbon feed which is derived from a Fischer-Tropsch process; (b)...

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Bibliographische Detailangaben
Hauptverfasser:	RENKEMA Duurt, DEN BOESTERT Johannes Leendert Willem Cornelis, KIEFFER Eduard Philip
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY MINERAL WAXES 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 SEPARATION TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR RELEVANT APPARATUS TRANSPORTING USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	The present invention relates to a process for preparing a base oil fraction having a reduced cloud point from a hydrocarbon feed which is derived from a Fischer-Tropsch process, the process comprises the steps of: (a) providing a hydrocarbon feed which is derived from a Fischer-Tropsch process; (b) subjecting the hydrocarbon feed of step (a) to a catalytic dewaxing treatment to obtain an at least partially isomerised product; (c) separating at least part of the at least partially isomerised product as obtained in step (b) into one or more light hydrocarbon fractions and one or more heavy base oil fractions; (d) separating at least one of the heavy base oil fractions as obtained in step (c) by means of a first membrane into a first permeate which comprises a base oil having a reduced cloud point and a first retentate which comprises a base oil containing haze compounds, wherein the membrane separation is carried out at a temperature in the range of from the pour point of the base oil and up to 120°C and a pressure in the range of from 5-60 bar; and (e) separating at least part of the first permeate as obtained in step (d) by means of a second membrane into a second permeate which comprises a base oil having a further reduced cloud point and a second retentate which comprises a base oil containing haze compounds, wherein the membrane separation is carried out at a temperature in the range of from the pour point of the base oil and up to 120°C and a pressure in the range of from 5-60 bar; and (f) recovering the second permeate as obtained in step (e).