Chain, continuous and no-waste method for degumming and fiber-separating the ramie

摘要

The present invention relates to a chain, continuous and no-waste method for degumming and fiber-separating the ramie, including anaerobic circle step, in which the raw fibers after the waste alkali bath step are immersed in the anaerobic water pool; aerobic circle step, in which the raw fibers after the anaerobic circle step are immersed in the aerobic water pool; alkali-hydrogen peroxide one bath scouring-bleaching step, in which the raw fibers after the aerobic circle step are immersed in a combined solution of NaOH and H2O2; and the treatment by a fiber-separating and washing device followed by the immersion in the cellulase solution. In the present invention, the ramie degumming process and the degumming wastewater treatment are performed integratively, and the degumming wastewater is completely recycled after treatment.

主权项

1. A method for degumming and fiber-separating ramie, characterized in that the method includes:
(1) waste alkali bath step, in which raw fibers are immersed in alkaline wastewater discharged from alkali-hydrogen peroxide bath scouring-bleaching at ambient temperature for 8 h; (2) anaerobic circle step, in which the raw fibers treated in the waste alkali bath are immersed in an anaerobic water pool in a bath ratio of 1:15 to 25, and washed at an ambient temperature for 8 h; (3) aerobic circle step, in which the raw fibers washed in the anaerobic water pool are immersed in an aerobic water pool in a bath ratio of 1:15 to 25, and washed at the ambient temperature for 8 h; (4) alkali-hydrogen peroxide bath scouring-bleaching step, in which the raw fibers treated in the aerobic circle step are immersed in a solution comprising 1 to 10 g/L NaOH and 0 to 2 g/L H2O2 in a bath ratio of 1:15 to 25, and reacted at a temperature of 70 to 100° C. for 2 h; (5) fiber-separating and washing step, in which the raw fibers washed in the alkali-hydrogen peroxide bath scouring-bleaching step are treated by a fiber-separating and washing device with a washing time of 4 h, which is performed either by rolling and rubbing manually or in a mechanical way; and (6) bio-enzyme washing step, in which the raw fibers treated in the fiber-separating and washing step are immersed in a solution having a cellulase concentration of 5 to 30 U in a bath ratio of 1:15 to 25 and reacted at a temperature of 55° C. for 2 h to reach the degumming and fiber-separating of the raw ramie fibers.