Patent ID: 6436233
Filing Date: 2002-08-20
Classification: D21C

Abstract:
A method of feeding a slurry of comminuted cellulosic fibrous material to a treatment vessel comprising:a) slurrying a comminuted cellulosic fibrous material with a slurrying liquid to produce a slurry of the comminuted cellulosic fibrous material and liquid having a first liquid-to-material volume ratio; b) pressurizing the slurry to a first pressure and transferring the slurry pressurized at said first pressure to a high-pressure transfer device; c) introducing the slurry pressurized at said first pressure into the high-pressure transfer device; d) in the high-pressure transfer device, pressurizing the slurry to a second pressure, higher than the first pressure; e) transferring the slurry pressurized at said second pressure from the high-pressure transfer device to a treatment vessel; f) introducing the slurry pressurized at said second pressure and transferred from the high-pressure transfer device into the treatment vessel; and g) removing at least some of the liquid from the slurry between a) and c) so that the slurry introduced to the high-pressure transfer device in c) has a second liquid-to-material volume ratio lower than the first liquid-to-material volume ratio.