Cellulose II phosphate ester and metal-adsorbing material using the same
AssigneeKowa Company, Ltd.
InventorKatsumi Yabusaki
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Abstract
This invention relates to cellulose II phosphate which may be partly carbamidated, and also to a metal-adsorbing material making use of the same. This cellulose II phosphate efficiently adsorbs metal ions in a solution, and can be used as a metal-adsorbing material and in a metal-adsorbing system.
Claims17
A carbamidated cellulose II phosphate, wherein said cellulose II phosphate has a degree of phosphorylation of from 3 to 20 wt % in terms of phosphorus content, and which is produced by reacting a phosphorus oxide, a phosphoric acid halide, or a phosphoric acid or a salt thereof with a dried cellulose II in the presence of urea.
A process for producing a carbamidated cellulose II phosphate in which said cellulose II phosphate has a degree of phosphorylation of from 3 to 20 wt % in terms of phosphorus content, which comprises reacting a phosphorus oxide, a phosphoric acid halide, or a phosphoric acid or a salt thereof with a dried cellulose II in the presence of urea.
Dependencies are inferred from the claim text.