| 摘要 |
Color material is removed from aqueous solutions of water-soluble polysaccharide ether, e.g. cellulose ethers, by contact with an anion exchange resin. Preferred anion exchange resins are derived from epoxy-amine polymers, acrylic-divinylbenzene copolymer or especially styrene-divinylbenzene copolymer. |
