Effect of organosolv and soda pulping processes on the metals content of non-woody pulps.
In this work the effect of different pulping processes (ethyleneglycol, diethyleneglycol, ethanolamine and soda) of tow abounded raw materials (empty fruit bunches - EFB and rice straw) on the ash, silicates and metals (Fe, Zn, Cu, Pb, Mn, Ni and Cd) content of the obtained pulps have been studied. Results showed that pulps obtained by diethyleneglycol pulping process presented lower metals content (756 microg/g and 501 microg/g for EFB and rice straw pulp, respectively) than soda pulps (984 microg/g and 889 microg/g). Ethanolamine pulps presented values of holocellulose (74% and 77% for EFB and rice straw pulp, respectively), alpha-cellulose (74% and 69%), kappa number (18.7 and 18.5) and viscosity (612 and 90 6ml/g) similar to those of soda pulp, and lower lignin contents (11% and 12%).
González
M
M
Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa, 1, 20018 Donostia-San Sebastián, Spain.
Cantón
L
L
Rodríguez
A
A
Labidi
J
J
D002482:Cellulose / Q000032:analysis; D019856:Ethanolamine / Q000737:chemistry; D019855:Ethylene Glycol / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry; D007220:Industrial Waste; D008670:Metals / Q000032:analysis*; D017640:Silicates / Q000032:analysis
D005026:Ethylene Glycols; D007220:Industrial Waste; D008670:Metals; D017640:Silicates; D019856:Ethanolamine; C013484:diethylene glycol; D002482:Cellulose; D019855:Ethylene Glycol