Title:
PROCESS FOR REFINING CHEMICALS FROM PULP AND PAPER MILL WASTEWATERS
Document Type and Number:
WIPO Patent Application WO/2011/123948
Kind Code:
A8
Abstract:
A process for isolating at least one target compound, such as manool, geranyl linalool, ethyl guaiacol, eugenol, veratraldehyde, squalene, terpin, cholesterol, beta-sitosterol, campesterol, stigmasterol, stigmastenol and dehydroabietic acid, from biomass, the process including steps of: obtaining a condensate from a recovery evaporator, a reverse osmosis retentate of a condensate of a pulp and paper mill, or both, the condensate, retentate or both being substantially free of higher molecular weight (approximately >1000 Da) cellulose and/or lignin and/or lignin-derived material; optionally pH adjusting and filtering the condensate to collect insoluble material; extracting the condensate, the collected insoluble material, or both, with solid phase extraction (SPE), liquid-liquid extraction or solid-liquid extraction to produce an extract containing the at least one target compound; and optionally purifying the extract containing the at least one target compound by thermal fractionation, chromatographic separation, recrystallization ion exchange, chelation, adsorption/desorption, lyophilization and sublimation or combinations thereof. The method is particularly useful for isolating the target compounds from wastewaters produced in a kraft pulp and paper mill, especially from recovery evaporator condensates produced during the treatment of black liquor.
Inventors:
MILESTONE CRAIG BRENNAN (CA)
MACLATCHY DEBORAH L (CA)
HEWITT L MARK (CA)
MACLATCHY DEBORAH L (CA)
HEWITT L MARK (CA)
Application Number:
PCT/CA2011/000388
Publication Date:
January 05, 2012
Filing Date:
April 07, 2011
Export Citation:
Assignee:
CANADA NATURAL RESOURCES (CA)
MILESTONE CRAIG BRENNAN (CA)
MACLATCHY DEBORAH L (CA)
HEWITT L MARK (CA)
MILESTONE CRAIG BRENNAN (CA)
MACLATCHY DEBORAH L (CA)
HEWITT L MARK (CA)
International Classes:
C07B63/00; B01D11/04
Attorney, Agent or Firm:
NEWTON, Trevor et al. (160 Elgin Street Suite 260, Ottawa Ontario K1P 1C3, CA)
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