Modification of lignin with phosphoric-urea mixture and study of its properties
https://doi.org/10.29235/1561-8331-2019-55-1-79-85
Abstract
The process of lignin phosphorylation in a medium of phosphoric acid and urea has been studied. The product prepared contains 1.3– 6.8 % phosphorus, 0.3–2.3 % nitrogen and has an ion exchange capacity of 0.7 to 2.8 mg-ekv•g–1 of Na+, to 1.8–2.3 mg-ekv•g–1 with respect to Ni2+ and 2.6 –2.8 mg-ekv•g–1 to UО22+. The product of thermal decomposition of lignin phosphate at 500 °C actively absorbs benzene vapor (sorption value of 0.42–0.52 sm3•g–1) and has a Na+ ion exchange capacity of 2.8 mg-ekv•g–1.
About the Authors
N. K. Luneva
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Nina K. Luneva – Ph. D. (Chemistry), Associate Professor, Leading Researcher.
9/1, Surganov Str., 220072, Minsk.
T. I. Ezovitova
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Tatiana I. Ezovitоva – Junior Researcher.
9/1, Surganov Str., 220072, Minsk.
V. V. Shevchuk
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Viacheslav V. Shevchuk – Corresponding Member, D. Sc. (Chemistry), Head of the Department of Mineral Fertilizers.
9/1, Surganova Str., 220072, Minsk.
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