Oxidative Ammonolysis of theEucalyptus GrandisKraft Lignin
نویسندگان
چکیده
منابع مشابه
Oxidative ammonolysis of uranium(IV) fluorides to uranium(VI) nitride
Actinide nitrides, in particular UN, are being considered as fuel types for advanced reactor systems. Here, we demonstrate a low-temperature synthesis route on uranium that could be developed into a commercial fabrication process for UN and mixed actinide nitride fuels. UN was successfully synthesized from UO2 by first reacting with NH4HF2 in a ball mill at 20 C to form tetravalent ammonium ura...
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The oxidative ammonolysis route was used to synthesize three uranium nitrides, UN2, U2N3, and UN, using UF4 as the starting material. Powder XRD analysis showed the UN2 and U2N3 products to contain less than 1.0 wt % uranium oxides. UO2 level was identified to be 5.0 (0) wt % in the UN product as it is made, but this level increases upon exposure to air. The morphology of these nitrides was stu...
متن کاملNovel multienzyme oxidative biocatalyst for lignin bioprocessing.
A novel multienzyme biocatalyst, based on coimmobilization of the laccase and horseradish peroxidase by cross linking and layer-by-layer coating with polyelectrolyte, was designed, synthesized and applied at the development of an oxidative cascade process on lignin. The efficiency and specificity of the new LbL-multienzyme system, the occurrence of a synergy of the co-immobilized enzymes, the l...
متن کاملThe Ammonolysis of Esters in Liquid Ammonia
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متن کاملPolyoxometalates in Oxidative Delignification of Chemical Pulps: Effect on Lignin
Chemical pulps are produced by chemical delignification of lignocelluloses such as wood or annual non-woody plants. After pulping (e.g., kraft pulping), the remaining lignin is removed by bleaching to produce a high quality, bright paper. The goal of bleaching is to remove lignin from the pulp without a negative effect on the cellulose; for this reason, delignification should be performed in a ...
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ژورنال
عنوان ژورنال: Journal Of The Brazilian Chemical Society
سال: 1994
ISSN: 0103-5053
DOI: 10.5935/0103-5053.19940002