Method of purifying fischer-tropsch derived water

Details Method of purifying fischer-tropsch derived water Method of purifying fischer-tropsch derived water

2006-12-19

2006-12-19

Barry, Chester T (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C210S615000, C210S616000, C210S617000, C210S638000, C210S641000, C210S650000, C210S652000, C210S660000

Reexamination Certificate

active

07150831

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.

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