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US 4,681,764 AGranted
Porous and spherical carbonaceous product
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsHiroshi Endo, Masao Katoh, Kuniaki Hino
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AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsHiroshi Endo, Masao Katoh, Kuniaki Hino
Estimating the term…
Disclosed herein is a novel porous and spherical carbonaceous product having acidic groups, basic groups, phenolic hydroxyl groups and carboxyl groups as functional groups at the following relationships: (1) the equivalent ratio of the acidic groups to the basic groups is in the range of 0.40 to 2.5 and (2) the value obtained by subtracting the amount of the carboxyl groups from the sum of the amounts of the basic groups and the phenolic hydroxylic groups is larger than 0.60, wherein the amount of the above-mentioned functional groups is expressed by milliequivalent/g of the product. The novel porous and spherical carbonaceous product having its groups in the above-mentioned relationships exhibits a specific adsorptive capability in living bodies and particularly useful as a pharmaceutical for treating diseases of the liver and kidney after administered orally.
A process for producing a porous and spherical carbon product having 0.30 to 1.20 meq/g of said product of acidic groups, 0.20 to 0.70 meq/g of said product of basic groups, 0.20 to 0.70 meq/g of said product of phenolic hydroxyl groups, less than 0.15 meq/g of said product of carboxyl groups, and equivalent ration of 0.40 to 2.5 of said acidic groups to said basic groups and larger than 0.60 meq/g of the value obtained by subtracting the amount of said carboxyl groups from the sum of said basic groups and said phenolic hydroxyl groups, comprising
Dependencies are inferred from the claim text.