Synthesis, performance and mechanism of a hyperbranched polymer with diethyl diphenyl-p-phenylenediamine as centronucleus

Feng, Xuening; Liu, Hanjun; Jiang, Xuebin; Ai, Guosheng; Yang, Ying; Sheng, Liwei; Zhang, Zejun; Ye, Fan; Yuan, Huaikui; Mi, Yuanzhu

doi:10.1016/j.colsurfa.2022.128888

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…It has the advantages of low dosage and fast flocculation, but it will produce sticky flocs and oil sludge. , Nonionic polyether can destroy the collision stability of oil droplets in water by reducing the strength of the water–oil interface and realizes oil–water separation through demulsification. There is no oil sludge produced when nonionic polyether is used. , Because the oil sludge produced by a nonionic polyether water clarifier is much less than that of a cationic polymer, , it has been increasingly widely used. Usually, a nonionic polyether water clarifier is prepared by anionic polymerization using ethylene oxide (EO) and propylene oxide (PO) as monomers and a compound containing active hydrogen as an acceptor.…”

Section: Introductionmentioning

confidence: 99%

“…There is no oil sludge produced when nonionic polyether is used. 13 , 14 Because the oil sludge produced by a nonionic polyether water clarifier is much less than that of a cationic polymer, 15 , 16 it has been increasingly widely used. Usually, a nonionic polyether water clarifier is prepared by anionic polymerization using ethylene oxide (EO) and propylene oxide (PO) as monomers and a compound containing active hydrogen as an acceptor.…”

Section: Introductionmentioning

confidence: 99%

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Empirical Relationship among the Parameters in HLD Equation of Block Polyether Water Clarifier

Wang,

Zhang,

et al. 2024

ACS Omega

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In this work, the empirical relationship among three apparent parameters in the hydrophilic−lipophilic deviation (HLD) equation was studied to provide help in using the HLD equation to design a block polyether water clarifier for treating produced water in an oilfield. Ten block polyethers (including six linear polyethers and four branched polyethers) were prepared, and their HLD equations were measured. By curve fitting, the empirical relationship among apparent hydrophobicity characteristic (K), apparent characteristic curvature (Cc n ), and apparent temperature coefficient (c t ) of block polyether were obtained: K = 9.32c t , Cc n = 18e −24.5K (for linear polyether), and Cc n = 3.7e −20.8K (for branched polyether). By introducing these relationships into the HLD equation and combining an empirical relationship between propylene oxide/ethylene oxide (mole ratio) in a block polyether and K/Ccn, a new block polyether was designed to treat the produced water. The treatment result confirmed the reliability of these empirical relationships. The results expand the practical application of HLD theory and are useful for the development of a block polyether water clarifier.

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