Kureha Corporation

Kureha Chemical Industry Company, Limited

Hideyuki Yoshihara

Naohiro Sonobe

Susumu Morimoto

Makoto Arakawa

Hiroyuki Hanatsuka

An adsorbent for oral administration, characterized by comprising a spherical activated carbon, wherein a diameter is 0.01 to 1 mm, a specific surface area determined by Langmuir's adsorption equation is 1000 m/g or more, and a diffraction intensity ratio, an R value, determined by an equation (1):=()/()&#x2003;&#x2003;(1)wherein Iis a diffraction intensity when a diffraction angle (&#x3b8;) of an X-ray diffractometry is 15&#xb0;, Iis a diffraction intensity when a diffraction angle (&#x3b8;) of an X-ray diffractometry is 35&#xb0;, and Iis a diffraction intensity when a diffraction angle (&#x3b8;) of an X-ray diffractometry is 24&#xb0;, is 1.4 or more; and an adsorbent for an oral administration, characterized by comprising a surface-modified spherical activated carbon, wherein a diameter is 0.01 to 1 mm, a specific surface area determined by Langmuir's adsorption equation is 1000 m/g or more, a total amount of acidic groups is 0.40 to 1.00 meq/g, a total amount of basic groups is 0.40 to 1.10 meq/g, and a diffraction intensity ratio, an R value, determined by equation (1) is 1.4 or more. The adsorbents for oral administration exhibit a useful selective adsorbability, that is, a less adsorbability of useful substances in a body, and a greater adsorbability of toxic substances.

Adsorbent for oral administration

An adsorbent for oral administration, characterized by comprising a surface-modified spherical activated carbon, having a diameter of 0.01 to 1 mm, a specific surface area determined by Langmuir's adsorption equation of 1000 m/g or more, a total amount of acidic groups of 0.40 to 1.00 meq/g, a total amount of basic groups of 0.40 to 1.10 meq/g, and a diffraction intensity ratio, an R value, determined by equation (1) of 1.4 or more. The adsorbents for oral administration exhibit a useful selective adsorbability; that is, a lesser adsorbability of useful substances, and a greater adsorbability of toxic substances, in a body.

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Tokyo, Japan

Hideyuki Yoshihara