Rohm and Haas Company

Tokyo Organic Chemical Industries, Ltd.

Wataru Agui

Hiroshi Kuyama

Keizo Ogino

Yukihiro Kaneko

Shuji Tamura

Yoshiya Kurachi

Masahiko Abe

Toshio Furukawa

Nobuyuki Higosaki

Koichiro Yamanari

Hirotake Ikari

Teruyoshi Takahashi

Motomi Ohta

A carbonaceous adsorbent to be used for the removal of a pyrogen dissolved in water is disclosed. The adsorbent is obtained by carbonizing porous beads of a cross-linked polymer. This adsorbent is favorably used for the removal of endotoxin in the production of pure water from deionized water resulting from the treatment with ion-exchange resins.

Carbonaceous adsorbent for removal of pyrogen from water

Compounds of formula I ##STR1## (wherein R represented (C.sub.1 -C.sub.4)alkyl, cyclohexyl, trichloromethyl, ethoxycarbonyl, or isopropoxycarbonyl) optionally together with dithiocarbamate-type compounds, are effective aquatic antifouling agents.

Aquatic antifouling compositions

Carbonaceous adsorbent for removal of pyrogen and method of producing

A carbonaceous absorbent to be used for the removal of a pyrogen dissolved in water is disclosed. The absorbent is obtained by carbonizing porous beads of a cross-linked polymer. This absorbent is favorably used for the removal of endotoxin in the production of pure water from deionized water resulting from the treatment with iron-exchange resins.

Polyvinylimidazoline flocculants are converted to an easily handled granular form by pelletizing with siliceous material and a lower alcohol, or mixture of lower alcohols with esters or ketones, and subsequently drying the pellets.

Granular flocculants and their manufacture

Growing community of inventors

Tokyo, Japan

Wataru Agui