| 摘要 |
<p>24,729 The clarification of specified types of aqueous suspensions of finely divided solids by the use of polymeric flocculating agents is markedly enhanced if, in conjunction with specified types of polymeric flocculating agents, the suspensions are treated with an aqueous acid colloidal solution of a melamine/formaldehyde resin containing from 2 to about 12 moles of formaldehyde per mole of melamine.</p> |
