Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane

›› 2011, Vol. 19 ›› Issue (4): 575-580.

Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane

蔡卫滨, 孙艳芝, 朴香兰, 李继定, 朱慎林

State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2010-11-17 修回日期:2011-03-31 出版日期:2011-08-28 发布日期:2011-08-28
通讯作者: LI Jiding,E-mail:lijiding@mail.tsinghua.edu.cn
基金资助:
Supported by the State Key Development Program for Basic Research of China(2009CB623404),the National Natural Science Foundation of China(20736003,20906056),the National High Technology Research and Development Program of China(2007AA06Z317,2008EG111021).

Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane

CAI Weibin, SUN Yanzhi, PIAO Xianglan, LI Jiding, ZHU Shenlin

State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2010-11-17 Revised:2011-03-31 Online:2011-08-28 Published:2011-08-28
Supported by:
Supported by the State Key Development Program for Basic Research of China(2009CB623404),the National Natural Science Foundation of China(20736003,20906056),the National High Technology Research and Development Program of China(2007AA06Z317,2008EG111021).

摘要/Abstract

摘要： Traditional solvent recovery in the extraction step of edible oil processing is distillation, which consumes large amounts of energy.If the distillation is replaced by membrane process, the energy consumption can be reduced greatly.In this work, two kinds of membrane, PDMS(polydimethylsiloxane) composite membrane and Zeolite filled PDMS membrane were prepared, in which asymmetric microporous PVDF(polyvinylidenefluoride) membrane prepared with phase inversion method was functioned as the microporous supporting layer in the flat-plate composite membrane.The different function compositions of the PDMS/PVDF composite membranes were characterized by reflection Fourier transform infrared(FTIR) spectroscopy.The surface and section of PDMS/PVDF composite membranes were investigated by scanning electron microscope(SEM).The PDMS NF(nanofiltration) membranes were then applied in the recovery of hexane from soybean oil/hexane miscellas(1:3, mass ratio).The effects of pressure(0.5-1.5 MPa), cross-linking temperature and PDMS layer thickness on membrane performances were investigated.The results indicated that both two kinds of NF membranes were promising for solvent recovery, and zeolite filled in PDMS NF membrane could enhance the separation performance.

关键词: PDMS, composite membrane, miscella, zeolite, solvent recovery

Abstract: Traditional solvent recovery in the extraction step of edible oil processing is distillation, which consumes large amounts of energy.If the distillation is replaced by membrane process, the energy consumption can be reduced greatly.In this work, two kinds of membrane, PDMS(polydimethylsiloxane) composite membrane and Zeolite filled PDMS membrane were prepared, in which asymmetric microporous PVDF(polyvinylidenefluoride) membrane prepared with phase inversion method was functioned as the microporous supporting layer in the flat-plate composite membrane.The different function compositions of the PDMS/PVDF composite membranes were characterized by reflection Fourier transform infrared(FTIR) spectroscopy.The surface and section of PDMS/PVDF composite membranes were investigated by scanning electron microscope(SEM).The PDMS NF(nanofiltration) membranes were then applied in the recovery of hexane from soybean oil/hexane miscellas(1:3, mass ratio).The effects of pressure(0.5-1.5 MPa), cross-linking temperature and PDMS layer thickness on membrane performances were investigated.The results indicated that both two kinds of NF membranes were promising for solvent recovery, and zeolite filled in PDMS NF membrane could enhance the separation performance.

Key words: PDMS, composite membrane, miscella, zeolite, solvent recovery

蔡卫滨, 孙艳芝, 朴香兰, 李继定, 朱慎林. Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane [J]. , 2011, 19(4): 575-580.

CAI Weibin, SUN Yanzhi, PIAO Xianglan, LI Jiding, ZHU Shenlin. Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane [J]. , 2011, 19(4): 575-580.

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Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane

Solvent Recovery from Soybean Oil/Hexane Miscella by PDMS Composite Membrane

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