The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2006
Filed:
Dec. 16, 2004
Luis P. F. Dancuart Kohler, Vaalpark, ZA;
Gert H. Du Plessis, Secunda, ZA;
Francois J. Du Toit, Sasolburg, ZA;
Edward L. Koper, Secunda, ZA;
Trevor D. Phillips, Vanderbijlpark, ZA;
Janette Van Der Walt, Vaalpark, ZA;
Luis P. F. Dancuart Kohler, Vaalpark, ZA;
Gert H. du Plessis, Secunda, ZA;
Francois J. du Toit, Sasolburg, ZA;
Edward L. Koper, Secunda, ZA;
Trevor D. Phillips, Vanderbijlpark, ZA;
Janette van der Walt, Vaalpark, ZA;
Sasol Technology (Pty) Ltd, Johannesburg, ZA;
Abstract
A process for the production of purified water from Fischer-Tropsch reaction water wherein the purified water is an aqueous stream having a COD of between 20 and 500 mg/l, a pH of between 6.0 and 9.0, a suspended solids content of less than 250 mg/l and a total dissolved solids content of less than 600 mg/l, and wherein the process includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process having at least one stage for removing at least a fraction of non-acid oxygenated hydrocarbons from the Fischer-Tropsch reaction water to produce a primary water enriched stream, a secondary treatment stage comprising liquid-liquid extraction for removing at least a fraction of organic acids from at least a portion of the primary water enriched stream to produce a secondary water enriched stream, a tertiary treatment stage comprising biological treatment for removing at least a fraction of acidic oxygenated hydrocarbons from at least a portion of the secondary water enriched stream to produce a tertiary water enriched stream and a quartic treatment stage comprising solid-liquid separation for removing at least some solids from at least a portion of the tertiary water enriched stream.