The effect of cationic unit structure on reverse demulsification and air flotation performance of cationic polyacrylate

Study on the structure–activity relationship of cationic polyacrylates for the treatment of oilfield produced water

“…According to our previous study, 15 the surface tension and interfacial tension of an aqueous solution of a cationic polyacrylate decreased to an equilibrium value with an increase in concentration to 1500 mg L −1 and 50 mg L −1 , respectively. In this study, the surface tension of solutions of cationic polyacrylates with a concentration of 1500 mg L −1 was measured at room temperature (flotation was conducted at room temperature) using a DSA30 drop shape analysis system (KRÜSS, Germany).…”

“…The results of evaluation of the reverse demulsification performance of different products have been presented in the literature, 15 and the molecular structure–property–reverse demulsification performance relationship is summarized in Fig. 7.…”

“…Cationic polyacrylates were synthesized according to a literature method. 15 Four variables were changed during the synthesis process, namely, acrylate type, tertiary amine type, mass ratio of the acrylate to the tertiary amine, and degree of cationicity of the tertiary amine. The structures of the cationic polyacrylates are shown in Fig.…”

“…3.1.5 Summary of structure-property-reverse demulsication performance relationship. The results of evaluation of the reverse demulsication performance of different products have been presented in the literature, 15 and the molecular structureproperty-reverse demulsication performance relationship is summarized in Fig. 7.…”