含氢硅油改性聚醚破乳剂的表界面性能研究

doi:10.3969/j.issn.1001-1803.2021.03.001

Abstract

Abstract:

The polyether demulsifiers SP169, AP201 and AE1910, were modified with hydrosilicone oil to obtain modified demulsifiers SISP, SIAP and SIAE, which were characterized by FT-IR spectroscopy. The surface parameters such as cmc, γ_cmc, Γ_max, A_min of the demulsifiers were measured. The results showed that the modification improved the ability of the demulsifiers to reduce the surface tension of the solvent. However, the results of dynamic oil-water interfacial tension showed that the multi-branched SIAP and SIAE had higher ability to reduce the oil-water interfacial tension. Meanwhile, the curves of dilatational elasticity （ε_d） and dilatational viscosity （ωη_d） of demulsifiers at oil-water interface with the variation of dilatational frequency （ω） were obtained by studying the viscoelasticity of the oil-water interface for different demulsifiers. It showed that the modification of polyethers mainly caused the change of the viscous modulus at oil-water interface for the demulsifiers. The demulsification performance of demulsifiers for crude oil emulsions was studied, and the performance of SISP and SIAP which were demulsifiers modified from SP169 and AP201 had been improved maximally.

Key words: modified polyether demulsifier, surface and interface performance, interfacial viscoelasticity, demulsification

CLC Number:

TQ423

YANG Di,MEI Qi-xiang,WU Juan,LAI Lu,MEI Ping. Research on surface and interface performance of hydrosilicone oil modified polyether demulsifiers[J].China Surfactant Detergent & Cosmetics, 2021, 51(3): 171-177.

Figures/Tables 7

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References 15

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破乳剂	cmc/（g·L^-1）	γ_cmc/（mN·m^-1）	Γ_max/（μmol·m^-2）	A_min/nm²
SP169	0.15	33.45	0.85	1.90
SISP	0.46	31.12	1.27	1.26
AP201	0.47	32.24	0.38	4.25
SIAP	0.011	32.47	0.61	2.63
AE1910	0.12	34.26	0.71	2.28
SIAE	0.016	32.29	1.19	1.35

原油破乳剂	不同时间脱水率/%					界面状况	水相清洁度	挂壁程度
原油破乳剂	5 min	10 min	15 min	20 min	30 min	界面状况	水相清洁度	挂壁程度
SP169	4	4	12	20	60	较齐	清	挂壁
AP201	4	8	20	32	72	较齐	清	挂壁
AE1910	12	24	40	80	86	较齐	清	微挂
SISP	4	20	60	92	96	齐	清	微挂
SIAP	8	36	68	92	100	齐	清	微挂
SIAE	8	16	24	48	96	较齐	清	不挂
空白	0	0	0	0	0	/	/	/

Research on surface and interface performance of hydrosilicone oil modified polyether demulsifiers

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