PROCESS FOR PREPARING A BASE OIL HAVING A REDUCED CLOUD POINT
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United States of America Patent
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Dec 30, 2015
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Dec 31, 2014
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Abstract
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 is provided. The process comprises:
- subjecting a hydrocarbon feed which is derived from a Fischer-Tropsch process to a catalytic dewaxing treatment to obtain an at least partially isomerised product;separating at least part of the at least partially isomerised product into one or more light hydrocarbon fractions and one or more heavy base oil fractions;separating at least one of the heavy base oil fractions by means of a first membrane into a first permeate and a first retentate;separating at least part of the first permeate by means of a second membrane into a second permeate and a second retentate; andrecovering the second permeate.
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