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Phase Equilibria for the Glycine-Methanol-NH4Cl-H2O System
Alternative TitleInd. Eng. Chem. Res.
Zeng, Yan1; Li, Zhibao1; Demopoulos, George P.2
2014-10-29
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:43Pages:16864-16872
AbstractAn investigation of the phase equilibria of the glycinemethanolNH(4)ClH(2)O system was carried out with the objective of optimizing the monochloroacetic acid (MCA) process for the production of glycine. Phase equilibrium of the glycineNH(4)ClH(2)O system at temperatures over the range of 283.2353.2 K was determined for concentrations ranging up to the multiple saturation points. The solubilities of both glycine and NH4Cl were found to increase with increasing temperature, as well as with increasing concentration of other solutes. The BromleyZemaitis model for ions and the Pitzer formulation for glycine neutral species implemented in the OLI platform were used in the regression of the experimental solubilities. The average absolute deviations between the regressed solubility values and the experimental data were found to be 1.4% for glycine and 0.93% for NH4Cl. Three binary interaction parameters of the Pitzer formulation were newly obtained and coupled with the BromleyZemaitis parameters documented in OLIs databank to predict the multiple saturation points of the system. Additionally, the solubility of glycine in methanolH(2)O mixtures was also measured from 283.2 to 323.2 K, and a sharp decline was observed as a function of the content of methanol. Such thermodynamic information is definitely useful for improving the existing industrial process, as well as providing fundamentals for the development of new glycine production processes.; An investigation of the phase equilibria of the glycinemethanolNH(4)ClH(2)O system was carried out with the objective of optimizing the monochloroacetic acid (MCA) process for the production of glycine. Phase equilibrium of the glycineNH(4)ClH(2)O system at temperatures over the range of 283.2353.2 K was determined for concentrations ranging up to the multiple saturation points. The solubilities of both glycine and NH4Cl were found to increase with increasing temperature, as well as with increasing concentration of other solutes. The BromleyZemaitis model for ions and the Pitzer formulation for glycine neutral species implemented in the OLI platform were used in the regression of the experimental solubilities. The average absolute deviations between the regressed solubility values and the experimental data were found to be 1.4% for glycine and 0.93% for NH4Cl. Three binary interaction parameters of the Pitzer formulation were newly obtained and coupled with the BromleyZemaitis parameters documented in OLIs databank to predict the multiple saturation points of the system. Additionally, the solubility of glycine in methanolH(2)O mixtures was also measured from 283.2 to 323.2 K, and a sharp decline was observed as a function of the content of methanol. Such thermodynamic information is definitely useful for improving the existing industrial process, as well as providing fundamentals for the development of new glycine production processes.
KeywordPartial Molal Properties Amino-acids High-pressures Activity-coefficients Transport-properties Aqueous-solutions Solubility Glycine Water Temperatures
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie502846m
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPARTIAL MOLAL PROPERTIES ; AMINO-ACIDS ; HIGH-PRESSURES ; ACTIVITY-COEFFICIENTS ; TRANSPORT-PROPERTIES ; AQUEOUS-SOLUTIONS ; SOLUBILITY ; GLYCINE ; WATER ; TEMPERATURES
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000344042700030
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11884
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 2B2, Canada
Recommended Citation
GB/T 7714
Zeng, Yan,Li, Zhibao,Demopoulos, George P.. Phase Equilibria for the Glycine-Methanol-NH4Cl-H2O System[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(43):16864-16872.
APA Zeng, Yan,Li, Zhibao,&Demopoulos, George P..(2014).Phase Equilibria for the Glycine-Methanol-NH4Cl-H2O System.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(43),16864-16872.
MLA Zeng, Yan,et al."Phase Equilibria for the Glycine-Methanol-NH4Cl-H2O System".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.43(2014):16864-16872.
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