Details

Autor(en) / Beteiligte

• Qu, Qian
• Tong, Mingsen
• Hu, Jinhu
• Xie, Fangqin
• Yan, Xuemin
• Lai, Lu
• Yu, Weichu
• Mi, Yuanzhu

Titel

Preparation of a low-temperature demulsifier derived from natural cottonseed oil

Ist Teil von

• Fuel (Guildford), 2024-10, Vol.373, p.132305, Article 132305

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Demulsifier was synthesized using inexpensive raw material.•Synthesis process of demulsifer is simple, safe and environmentally friendly.•Demulsification efficiency of up to 100 % was attainable at low temperature. In this study, a low-temperature demulsifier (TEP-L) was synthesized by a simple method using polyethylene glycol 1000, and low-cost and readily accessible cottonseed oil as raw materials. The cottonseed oil was first hydrolyzed and then directly reacted with polyethylene glycol 1000 to obtain TEP-L. The chemical composition of TEP-L was determined by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance hydrogen spectroscopy (1H NMR). A comprehensive investigation was conducted to explore the demulsification performance of TEP-L in water-in-oil (W/O) emulsion. The investigation notably considered the effect of demulsifier dosage, temperature, settling time, pH value, and salinity on the demulsification process. The results demonstrated that the dehydration rate (DR) could reach 100 % with 1000 mg/L of TEP-L at 40 ℃ for 21 h, or a dosage of 500 mg/L at 60 ℃ for 240 min. Moreover, TEP-L exhibited a DR exceeding 90 % over a broad pH range of 8–12 and displayed remarkable resistance to salt. Characterization methods such as surface tension (SFT), dynamic interface tension (IFT), zeta potential, and optical microscopy observation were utilized to investigate the demulsification mechanisms.