| 摘要 |
510,243. Purifying water. 1. G. FARBENINDUSTRIE AKT.-GES. Jan. 28, 1938, No. 2776. Convention date, Feb. 6, 1937. [Class 46] [Also in Group IV] Ion. exchange bodies are prepared by adding an organic ion exchange material to the starting materials of a synthetic resin or to the intermediate condensation product and effecting or completing the condensation to yield a resin having a gel structure. |
