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Den Boestert

Johannes Leendert Den Boestert, Amsterdam NL

Patent application number	Description	Published
20090012342	Process to prepare a haze free base oil - Process for reducing the cloud point of a base oil having a kinematic viscosity at 100° C. of greater than 10 cSt by separating the molecules inferring the high cloud point from the base oil by means of a membrane separation wherein the feed is separated into a a permeate as the base oil having the reduced cloud point and a retentate.	01-08-2009

Johannes Leendert Willem Den Boestert, Amsterdam NL

Patent application number	Description	Published
20090014359	Process for separating colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture - Process for separating colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture using a membrane having a feed side and a permeate side, by contacting the hydrocarbon mixture with the feed side of the membrane, and by removing at the permeate side a hydrocarbon permeate having a reduced content of colour bodies and/or asphalthenic contaminants, wherein the membrane is arranged in a spirally wound membrane module.	01-15-2009

Johannes Leendert Willem Cornelis Den Boestert, Amsterdam NL

Patent application number	Description	Published
20090065432	METHOD AND APPARATUS FOR REMOVING METAL SULPHIDE PARTICLES FROM A LIQUID STREAM - The invention provides a method for removal of metal sulphide particles from a liquid stream comprising a solvent and metal sulphide particles, using a filter system comprising at least one membrane, the method comprising contacting the liquid stream with the membrane, thereby transferring metal sulphide particles from the liquid stream onto the membrane surface to obtain a liquid stream depleted of metal sulphide particles and a filter system comprising a membrane enriched in metal sulphide particles. The invention further provides an apparatus for removal of metal sulphide particles from a liquid stream comprising a solvent and metal sulphide particles, wherein the apparatus comprises a solvent regenerator column (	03-12-2009
20100105959	PROCESS FOR THE REMOVING POLY(PROPYLENE OXIDE) FROM PROPYLENE OXIDE BY MEMBRANE SEPARATION - The invention relates to a process for removing poly(propylene oxide) from propylene oxide by membrane separation, wherein a membrane having an average pore size of from 0 to 5 nm is used. In said process, a liquid feed comprising propylene oxide and poly(propylene oxide) may be separated by the membrane into a permeate comprising propylene oxide and either no poly(propylene oxide) or poly(propylene oxide) at a concentration which is lower than the poly(propylene oxide) concentration in the feed, and a retentate comprising propylene oxide and poly(propylene oxide) at a concentration which is higher than the poly(propylene oxide) concentration in the feed.	04-29-2010
20100147745	METHOD FOR REDUCING THE MERCURY CONTENT OF NATURAL GAS CONDENSATE AND NATURAL GAS PROCESSING PLANT - A method for reducing the mercury content of natural gas condensate, comprising the steps of providing a nanofiltration membrane having a feed side and a permeate side; contacting the natural gas condensate with the feed side of the membrane; and obtaining a mercury-depleted natural gas condensate at the permeate side of the membrane; and a natural gas processing plant comprising a condensate workup section including a nanofiltration membrane separation unit for reducing the mercury content of natural gas condensate.	06-17-2010