Polyoxyalkylenated amines for breaking water-in-oil emulsions: effect of structural variations on the demulsification efficiency
✍ Scribed by Abdel-Azim A. Abdel-Azim; Nael N. Zaki; Nermine E.-S. Maysour
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 285 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1042-7147
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✦ Synopsis
In the present work, different aliphatic and aromatic amines were ethoxylated after a previous propoxylation (PPPEA) with different degrees of propoxylation and ethoxylation in order to obtain polymeric surfactants having different hydrophilic±lipophilic balance (HLB) values. The influence of the structural variations in the prepared PPPEA on their efficiency as demulsifiers for water-in-oil emulsions was investigated. Synthetic water-in-benzene emulsions stabilized by petroleum asphaltenes was utilized for the completion of this study. The actual propylene oxide (PO)±ethylene oxide (EO) ratios of the PPPEA under investigation was elucidated via 1 H NMR spectroscopy. It was found that each demulsifier practices a maximum demulsification efficiency at an optimum concentration. At this concentration, the demulsifiers' molecules were believed to form a monolayer by adsorbance at the benzene±water interface. The influences of the number of aromatic rings in the molecule, the degree of substitution in the aromatic rings, the number of amine groups, the number of PO±EO chains and HLB on the demulsification efficiency were accomplished.