Process for treating black digestion liquid generated by paper alkali pulping


Application Number: 00105036
Application Date: 2000.04.05
Publication Number: 1316567
Publication Date: 2001.10.10
Priority Information:
International: D21C11/04
Applicant(s) Name: Li Fengning
Address:
Inventor(s) Name: Li Fengning
Patent Agency Code: 00000
Patent Agent:
Abstract A treating method for steaming and boiling black liquor of soda pulping process in paper making features that CaO2 and polyacrylamide are added to the high-temperature and high-concentrated black liquor and then the residues are separate from the liquid. The clear liquid is then mixed with fresh chemicals and sent back the steaming and boiling process for reutilization.