Patent ID: 8012308
Filing Date: 2011-09-06
Classification: D21C

Abstract:
1. A method of manufacturing mechanical pulp from cornstalk cellulose, the method comprising: a first digesting process performed by adding 0.5-5 parts by weight of the digesting agent being sodium oxide only; and sodium oxide-as a digesting agent to 100 parts by weight of crushed cornstalks, impregnating the crushed cornstalks with the digesting agent, and separating and digesting the impregnated cornstalks to obtain a solid substance; sodium oxide as a second digesting process performed by adding 5-10 parts by weight of the digesting agent to the solid substance obtained from the first digesting process, impregnating the solid substance with the digesting agent, and separating and digesting the impregnated solid substance; and a refining process of separating the solid substance to be digested and refining it mechanically, which is performed before, during or after the second digesting process, wherein the refining process is performed under a temperature of 130 to 160° C. for 10 to 60 minutes without additional chemicals.