| abstract |
Method of removing impurities from water Amine-aldehyde resins are disclosed to remove a wide variety of solids and / or ionic species from the liquids where they are suspended and / or dissolved. These resins are especially useful as foam flotation depressants, for example in the processing of valuable materials (e.g. bitumen, coal or kaolin clay) to remove impurities such as sand. The resins are also useful for treating aqueous liquid suspensions, for removing solid particles, as well as for removing metal ions in water purification. |