| 摘要 |
<p>A method of treating an aqueous dispersion of negatively charged colloidal particles to flocculate at least a portion of said particles which comprises treating said aqueous dispersion simultaneously with a polyalkylenimine polymer having a molecular weight from 5,000 to 100,000 and a polyalkylene polyamine polymer having the formula H2N-(CnH2nNH)a-H wherein n ranges from 2 to 4 and "a" ranges from 250 to 5,000, said two polymers being employed in a weight ratio to each other ranging from 1 to 99 to 99 to 1.</p> |
