De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation

Ling Lü; Kejing Wu; You Tang; Siyang Tang; Bin Liang

doi:10.1016/j.cjche.2018.04.027

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De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation

Separation Science and Engineering | Updated：2026-01-06

- De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation
- Chinese Journal of Chemical Engineering Vol. 26, Issue 10, Pages: 2048-2054(2018)
- Affiliations：
  
  2 College of Chemical Engineering and Chemistry Technology, Southwest Petroleum University,Chengdu,China,610500
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.04.027
  CLC：
- Published：2018
- Accepted：
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Ling Lü, Kejing Wu, You Tang, Siyang Tang, Bin Liang. De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation[J]. Chin.J.Chem.Eng., 2018, 26(10): 2048-2054.
DOI：

Ling Lü, Kejing Wu, You Tang, Siyang Tang, Bin Liang. De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation[J]. Chin.J.Chem.Eng., 2018, 26(10): 2048-2054. DOI： 10.1016/j.cjche.2018.04.027.

摘要

Abstract

Low-speed rotation of disc in an internal circulation of a novel de-emulsification with rotation-dise horizental contactor (RHC-D) realized de-emulsification for O/W emulsions due to repeated coalescence in oil-wet narrow channels at a low rotation speed. For three emulsions included ethanol/water/2-ethyl-1-hexanol

ethanol/water/2-ethyl-1-hexanol/SDS (Sodium Dodecyl Sulfonate) and 2-ethyl-1-hexanol/water/SDS emulsion

deemulsification ratios of oil phase could reach 1

1 and 0.67 respectively at 170 r·min

-1

and de-emulsification ratios increased obviously after agitating 10 min. De-emulsification experiment in the seam indicated that oil droplet sizes in O/W emulsion became larger after de-emulsification. The main de-emulsification mechanism in RHCD was the coalescence of oil droplets in oil-wet narrow channels. With increase of the rotation speed

oil droplets dispersed better in the aqueous phase. However

de-emulsification effect enhanced due to the increase of the coalescence rate at a bit higher rotation speed. In addition

internal circulation made those O/W emulsions to be broken repeatedly

consequently de-emulsification ratio increased. Repeated de-emu

lsification through internal circulation might make continuous extraction of ethanol come true at a low rotation speed.

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