Title: Filtration of soot/ash water slurries and improved partial oxidation process for hydrocarbon feedstocks
Application Number: 93121333 Application Date: 1993.11.11
Publication Number: 1093338 Publication Date: 1994.10.12
Approval Pub. Date: 1997.07.02 Granted Pub. Date: 1997.07.02
International Classifi-cation: B01D33/052;C10K1/08
Applicant(s) Name: Norsk Hydro A.S. Address:
Inventor(s) Name: Wolfgang Kowallik;Hans Juergen Maaz;Thomas Schmitz
Attorney & Agent: WEI JINXI
Abstract:
    The present invention relates to an improved partial oxidation, gasification process under formation of a soot water slurry containing the unburned carbon and ash. The invention also relates to a filtering method for ash or ash slurry. It is thereby established a direct once-through, partial oxidation process avoiding the recycle of unburned carbon and ash. The slurry is cooled to a temperature below 80 DEG C and filtered while confined between movable closed belts maintaining a constant pressure against the shrinking mass of carbon/ash particles until the moisture content is reduced to below 80 % by weight. Flocculating agents are added to the soot slurry before filtration, one in the form of a cationic and the other in the form of an anionic flocculation agent. A flaky, or granular filtercake suitable for further processing is obtained.
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