Abstract: An adsorbent comprising a porous copolymer produced by copolymerizing a cross-linkable monomer and a mono-ethylenically unsaturated monomer, said copolymer having pores of an average pore diameter (d) of 500 A to 6,000 A and having such a broad pore diameter distribution that the pore volume having a pore diameter in the range of from 0.5 d to 2 d is not more than 60% of the total pore volume in the copolymer. By the use of such a porous copolymer having a specific composition and pore characteristics, organic compounds (e.g. toxic compounds) adsorbed on the proteins (e.g. plasma proteins) present in intercellular and/or extracellular liquids (e.g. blood) can be effectively adsorption-removed. Especially when the present adsorbent is used for purification of blood, it is advantageously subjected to such a pretreatment that plasma proteins are adsorbed on the adsorbent and then crosslinked with a crosslinking agent.

Abstract: An anion exchange resin particle provided with specific structure as well as specific functional groups is found to be suitable for uranium technology, especially for separation of uranium isotopes.

Abstract: A method of producing a polar, porous polymer comprising polymerizing a monomer mixture comprising:(A) about 2 to about 98 percent by weight of at least one cross-linkable monomer having a plurality of CH.sub.2 .dbd.

Abstract: An anion exchange column, containing anion exchange resin particles with uniform degree of sphericity, restricted average diameter and uniform particle size distribution and having devices for flowing a liquid uniformly, is suitably used for uranium technology, especially for separation of uranium isotopes.