| http://www.w3.org/ns/prov#value | - The resins comprise the reaction product of a primary or secondary amine and an aldehyde (e.g., a urea-formaldehyde resin).BACKGROUND OF THE INVENTION Froth Flotation Industrially, processes for the purification of liquid suspensions or dispersions (and especially aqueous suspensions or dispersions) to remove suspended solid particles are quite prevalent.
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