Life cycle assessment of solvent extraction as a low-energy alternative to distillation for recovery of N-methyl-2-pyrrolidone from process waste
Tóm tắt
This case study investigates low-energy alternatives to distillation for the recovery of N-methyl-2-pyrrolidone (NMP) from solvent waste in the manufacture of resin precursors. Evaluation includes environmental and economic life cycle assessment of solvent recovery and reuse using batch distillation, solvent extraction, and solvent extraction at a sister plant. Solvent extraction at the sister plant involved shipment of hazardous waste to a facility with existing solvent recovery equipment and lower purity standards for NMP. The amount of processing required to recover useful NMP is reduced, increasing reductions in life cycle emissions and damages to the environment. Extraction at the sister plant recovered 98% of the NMP at a purity of 97.1 wt% from aqueous waste containing 17 wt% NMP. Extraction at the sister plant reduced total and CO2 life cycle emissions by 61% and 59%, respectively. Compared to the distillation recovery alternative, extraction at the sister plant results in reductions of 32% and 33% for total and CO2 life cycle emissions, respectively. Annual operating costs were reduced by 80%, with no capital investment, due to utilization of existing equipment. This resulted in a 10-year net present value (NPV) of $4.20 million, whereas distillation resulted in a 10-year NPV of $3.12 million.
Từ khóa
Tài liệu tham khảo
2011, Chem. Soc. Rev., 41, 1437
1992, Polyimides: materials, processing, and applications
2007, J. Environ. Sci. Health, Part A: Toxic/Hazard. Subst. Environ. Eng., 42, 1595, 10.1080/10934520701517747
2011, The complete guide on industrial pollution control
2013, Sep. Purif. Technol., 12, 415
2009, Innovations Pharm. Technol., 29, 78
2011, Chem. Soc. Rev., 41, 1437
2007, Green Chem., 10, 31
2011, The complete guide on industrial pollution control
2013, Sep. Purif. Technol., 12, 415
2010, Huaxue Yanjiu Yu Yingyong, 22, 1446
2010, Green Chemistry in the Pharmaceutical Industry
2011, Green chemistry and engineering: a practical design approach,
2016, ALTSEP: Initial Steps on the Road to Low Energy-Intensity Chemical Separation
2012, Clean Technol. Environ. Policy, 12, 687
2010, Green Chemistry in the Pharmaceutical Industry
2010, Huaxue Yanjiu Yu Yingyong, 22, 1446
2008, Chem. Eng. News, 86, 32
2008, Chem. Eng. News, 86, 32
2009, ReCiPe 2008: a life cycle impact assessment method which comprises harmonised category indicators at the midpoint and the endpoint level: report I: characterisation
2011, Green chemistry and engineering: a practical design approach,
2010, J. Membr. Sci., 409–410, 82
1996, Polyimides: Fundamentals and Applications
2013, Chemical engineering design
2007, J. Environ. Sci. Health, Part A: Toxic/Hazard. Subst. Environ. Eng., 42, 1595, 10.1080/10934520701517747
2007, Green Chem., 10, 31
1999, Hansen solubility parameters
2010, J. Membr. Sci., 409–410, 82
2013, Chemical engineering design
1992, Polyimides: materials, processing, and applications
1996, Polyimides: Fundamentals and Applications
2016, ALTSEP: Initial Steps on the Road to Low Energy-Intensity Chemical Separation
2012, Clean Technol. Environ. Policy, 12, 687
2009, Innovations Pharm. Technol., 29, 78
2009, ReCiPe 2008: a life cycle impact assessment method which comprises harmonised category indicators at the midpoint and the endpoint level: report I: characterisation
1999, Hansen solubility parameters