Patent ID: 6106668
Filing Date: 2000-08-22
Classification: D21C

Abstract:
A method of feeding wood chips to the top of a treatment vessel comprising the steps of:(a) steaming the wood chips to remove air therefrom and to heat the wood chips;(b) slurrying the wood chips with a cooking liquor to produce a slurry of liquid and wood chips;(c) pressurizing the slurry at a location at least thirty feet below the top of the treatment vessel and transferring pressurized slurry to the top of the treatment vessel, said pressurizing step consisting of acting on the slurry with one or more high pressure slurry pumps; and(d) during the practice of the transferring step (c), treating the wood chips with polysuflide, anthraquinone or their equivalents or derivatives, surfactants, enzymes, chelants, or combinations thereof.