IPST Technical Paper Series Number 867 Flotation Deinking of Old Newsprint Using Poly(Diallylmethylammonium Chloride) as a Single Deinking Agent
نویسندگان
چکیده
Flotation deinking of old newsprint (ONP) using polydiallyldimethylammonium chloride (polyDADMAC) as the only deinking agent was studied. The results demonstrate that polyDADMAC can neutralize dissolved anionics to form small particles. These small particles, together with ink, filler, and fines, strongly adsorbed onto air bubble surfaces and functioned as particle foaming agents. Therefore, no conventional surfactant was needed during flotation. An unexpected benefit using polyDADMAC as a single flotation agent was much higher ink, ash, and anionic trash removal during flotation than that achieved with traditional fatty acid/calcium systems. This single flotation agent can be used in acidic, neutral, and alkaline deinking processes.
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