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Insight into the role of ethylene glycol on thermodynamics and nucleation kinetics of dimethyl terephthalate in mixed solvent system

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Particuology 2024年第2期85卷 1-12页

作者： Yujin Zhang Chunyan Shi Jing Tang Li Liu Dongxia Yan Qing Zhou xingmei lu Songyan Jia College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang110142China Bejing Key Laboratoryoflonic Liquids Clean Process CAS Key LaboratoryofGreen Process and EngineeringState Key Laboratoryof Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering Qingdao UniversityQingdao266071China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou450001China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Dissolution and nucleation are two essential processes for industrial crystallization.This paper in-vestigates the effect of ethylene glycol addition on the crystallization behavior of dimethyl terephthalate(DMT)in solution.The DMT solubility in mixed solvent system(methanol-ethylene glycol)was deter-mined by isothermal satiation approach,and the solubility was associated using seven models.The model fitting results were consistent with the experimental values.Based on the results,the metastable zone width(MSZW)of DMT was detected by the polythermal approach;the modified Sangwal's theory was used to investigate the nucleation behavior,which can provide a new way of thought for better analysis of the crystallization behavior.The results demonstrated that MSZW was associated with various elements,such as cooling rate,saturation temperature and mass fraction of ethylene glycol.The addition of ethylene glycol slowed down the nucleation rate as shown by the broadening of MSZW.We derive the solid-liquid interface energy,the nucleation driving force,the critical nucleation size and the critical Gibbs free energy according to the classical nucleation theory.It is demonstrated that the nucleation driving force and the solid-liquid interface energy are dependent and jointly influence the MSZW.

关键词： Dissolution Nucleation Solubility Apparent thermodynamic parameters Metastable zone width Solid-liquid interface energy

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Solubility determination and thermodynamic modeling of bis-2-hydroxyethyl terephthalate(BHET)in different solvents

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Chinese Journal of Chemical Engineering 2022年第5期35卷 294-300页

作者： Haoyu Yao Dongxia Yan xingmei lu Qing Zhou Yinan Bao Junli Xu Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical and Engineering University of Chinese Academy of SciencesBeijing 100049China Sino Danish College University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China College of Chemical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China

Studies on the degradation process of waste polyethylene terephthalate(PET)have become increasingly mature,but there are relatively few studies on the separation of degradation products.The products contain many components and the separation of which is difficult.Therefore,the study on phase equilibrium thermodynamics of bis-2-hydroxyethyl terephthalate(BHET)is of great theoretical significance and practical value to provide basic data for the BHET crystallization separation.In this work,the degraded products were purified and characterized.The solubility of BHET in methanol,ethanol,ethylene glycol,water and the mixture of ethylene glycol+water were determined by static method.The experimental results were correlated with different models,such as ideal solution(IS)model,λh equation,Apelblat equation and NRTL model.Based on the van’t Hoff equation,the mixing Gibbs energy,enthalpy and entropy were calculated.From this work,the basic data which can be used to guide the crystallization process of BHET were obtained,including solubility data,correlation model and thermodynamic properties.

关键词： Bis-2-hydroxyethyl terephthalate Purified Characterized Solubility Correlation model Thermodynamics properties

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Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

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Chinese Journal of Chemical Engineering 2023年第1期53卷 133-141页

作者： Mi Feng Bin He Xinyan Chen Junli Xu xingmei lu Cai Jia Jian Sun Key Laboratory of Molecular Medicine and Biotherapy Ministry of Industry and Information TechnologySchool of Life SciencesBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering Ministry of Industry and Information TechnologyAdvanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsState Key Laboratory of Biochemical EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical and Engineering University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

Chitin is a widely used important industrial polymer mainly from shrimp shells, but its commercial preparation is under the great challenge of serious pollution due to the requirement of HCl and Na OH.Herein, we demonstrated that high purity chitin can be obtained from waste shrimp shells(WSSs) by cascade separation with transition metal salt aqueous solution and ionic liquid(IL). Firstly, calcium carbonate of WSSs was effectively removed in the metal salt aqueous solution driven by the ion exchange interaction. Subsequently, 1-butyl-3-methylimidazolium chloride([Bmim]Cl) had bifunctional abilities to remove residual protein and introduced metal salts simultaneously by hydrogen bonding and coordination interactions. The key experimental factors affecting the separation process were systematically studied, including the type of metal salts, temperature, and [Bmim]Cl loading. After sequential treatment with a 20%(mass) Ni SO4aqueous solution at 130 ℃ and [Bmim]Cl at 150 ℃, the purity of a-chitin can be up to 96.5%(mass) that meets commercial requirements. The use of metal salts with higher coordination ability makes the preparation of chitin no longer depend on the commonly acid-base reaction, which is conducive to the preservation of chitin structure.

关键词： Chitin Ionic liquids Transition metal salts Separation Sustainability

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Principles and strategies for green process engineering

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Green Chemical Engineering 2022年第1期3卷 1-4页

作者： Suojiang Zhang Hongyan He Qing Zhou Xiangping Zhang xingmei lu Yuan Tian Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China

The evolution of human civilization is becoming increasingly synchronized with the development of science and technology. Every step toward advancement achieved by humans showcases our creativity and ability to realize ideas in practice. However, due to human activities aimed at goal fulfillment, Mother Earth has undeniably undergone many irreversible changes, which in turn have negatively impacted the environment [1].

关键词： becoming irreversible advancement

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Highly efficient enzymolysis and fermentation of corn stalk into L-lactic acid by enzyme-bacteria friendly ionic liquid pretreatment

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Green Chemical Engineering 2022年第4期3卷 321-327页

作者： Yongqing Yang Yuehai Wang xingmei lu Xu Zheng Dongxia Yan Jiayu Xin Ibrahim El-Tantawy El-Sayed Ying Kang Jiming Yang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Department of Chemistry Faculty of ScienceMenoufia UniversityShebin El-KomMenoufia32511Egypt Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China

Ionic liquids(ILs)have been widely used in the pretreatment of biomass.However,the effects of residual ILs on the enzymolysis and fermentation of biomass are still unknown.Therefore,a large quantity of water-washing is usually followed after biomass pretreatment to eliminate the inhibition of residual ILs on subsequent hydrolysis and fermentation steps.In this work,the effect of choline glycine([Ch][Gly])concentration on the activity of cellulase and Bacillus sp.strain P38 was systematically investigated to explore the impacts of residual ILs on enzymolysis and fermentation.The results confirmed that the activities of them were almost not inhibited in low concentrations(less than 0.5 wt%)of[Ch][Gly].Under optimal pretreatment conditions,the maximum cellulose digestibility was 99.23%.Enzymatic hydrolysate was suitable for L-lactic acid fermentation without appreciable inhibition,and the highest sugar-acid conversion rate of 96.33%was obtained by simplified detoxification.This work provides an economic route to produce fermentable sugar and L-lactic acid,which shows an industrial application prospect in lignocellulosic biorefinery.

关键词： Corn stalk Biocompatibility Choline glycine Enzymatic hydrolysis L-lactic acid fermentation

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Study on ionic liquids based novel method for separation and purification of silkworm pupa protein

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Chinese Chemical Letters 2023年第1期34卷 382-387页

作者： Wen Zhang Shaoqi Yang Baozeng Ren xingmei lu Cai Jia Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou 450000China Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs College of Mechanical&Electrical EngineeringHenan Agricultural UniversityZhengzhou 450002China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China

Silkworm pupa protein(SPP)that obtained by traditional method usually had a high fat content,which would impose restrictions on the further use of SPP.Herein,various functionalized ionic liquids(ILs)were used to extract SPP from silkworm pupae,the structure-performance relationship of ILs with their SPP separation performance were explored at the same time.The research showed that the maximum extraction yield of SPP was up to 62.6%with less than 0.5%low fat content by using 1-ethyl-3-methylimidazolium chloride([Emim]Cl),when the dissolution experiment was conducted at 90°C for 24 h with ethanol bath as the regeneration solvent.Comparing with the structure of raw material,the regenerated SPP maintained the native protein backbone.Meanwhile,all regenerated SPP showed a decreased crystallinity,which also exhibited decreased fraction of theα-helix comparing to thatβ-sheet united with coil random structures.

关键词： Silkworm pupa protein Ionic liquids Protein backbone Silkworm pupa Separation

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A facile ionic liquid approach to prepare cellulose fiber with good mechanical properties directly from corn stalks

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Green Energy & Environment 2020年第2期5卷 223-231页

作者： Jiming Yang xingmei lu Yanqiang Zhang Junli Xu Yongqing Yang Qing Zhou Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

It is very difficult to directly spin the lignocellulose without pretreatment.Ionic liquids(ILs)are promising solvent to dissolve lignocellulose to prepare cellulose fiber.However,the degree of cellulose polymerization(DP)is reduced when lignocellulose is dissolved in ILs,and the lignin removal rate is low.The elongation at break and tensile strength of the fibers obtained by spinning the lignocellulose dissolved in ILs are poor.In this paper,preparing cellulose fiber directly from lignocellulose based on dissolving corn stalk via[C4mim]Cl-L-arginine binary system is achieved.It shows that the removal rate of lignin can reach 92.35%and the purity of cellulose can reach 85.32%after corn stalk was dissolved at 150℃C for 11.5 h when the mass fraction of arginine is 2.5%.The elongation at break of fiber reached 10.12%and the tensile strength reached 420 MPa.It is mainly due to the fact that L-arginine not only inhibits the degradation of cellulose but also promotes the delignination.Without any pulping or pretreatment,preparing cellulose fibers via direct dissolution and extrusion may provide a simple and effective way to prepare many novel cellulose materials.

关键词： Cellulose fibers Ionic liquids Corn stalks Dissolving Directly spinning

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Sub/supercritical carbon dioxide induced phase switching for the reaction and separation in ILs/methanol

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Green Energy & Environment 2016年第2期1卷 144-148页

作者： Jiayu Xin Dongxia Yan Ruimei Cao xingmei lu Huixian Dong Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences

Separation of products from ionic liquid(IL) solvents is one of the main challenges that hinder their utilizations. In this study, the production of γ-valerolactone(GVL) by selective hydrogenation of α-angelica lactone(AL) and separation of the products from the IL solvent were carried out by using subcritical CO_2 as a "switch" at room temperature. After the mixture was separated into two phases by subcritical CO_2, AL and nano Pd/C catalyst were only found in the lower IL-rich phase, GVL was produced with quantitative yield and enriched in the upper methanolrich phase. Pure GVL can be obtained by depressurizing to release CO_2 and evaporation to remove methanol of the upper phase, the lower phase containing IL, catalyst and methanol can be recycled for the next reaction. The strategy may provide a new approach to produce and separate products from IL solvents at mild conditions.

关键词： Separation Ionic liquids Selective hydrogenation Mild condition Subcritical CO2

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Frontiers of Ionic Liquids

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Green Chemical Engineering 2021年第4期2卷 337-338页

作者： Gabriela Gurau Małgorzata Swadzba-Kwasny xingmei lu Sheng Dai 525 Solutions Inc.TuscaloosaAL35403USA QUILL School of Chemistry and Chemical EngineeringQueen's University BelfastBelfastBT95AGUK Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN37831USA

Researchers around the globe are no strangers to the term“Ionic Liquids(ILs)”.With diverse applicability in chemistry,materials,chemical engineering,medicines,biochemistry to name a few,ILs are doing exactly what the researchers in the field predicted they will do,during the first international meeting devoted entirely to ILs research held on Greek grounds in Crete,back in April 2000:ILs are sustainable and decrease the environmental burden(e.***.reduce reliance on fossil fuel feedstock and replace them with renewable,increase energy efficiency,improved and/or new chemical and separation processes,etc.),while still being economically feasible in an industrial scale.

关键词： entirely replace devoted

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基于转录组学和网络药理学探讨肉豆蔻挥发油干预低氧性肺动脉高压的作用机制

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中草药 2024年第10期55卷 3375-3387页

作者：芦殿香张虹波梁焯森王玉蓉于洋李永芳南星梅青海大学医学部青海西宁810001 成都大学附属医院四川成都610081

目的基于转录组学和网络药理学探讨肉豆蔻挥发油(volatile oil from Myristica fragrans,VOMF)干预低氧性肺动脉高压(hypoxic pulmonary artery hypertension,HPAH)的作用机制。方法通过SwissTargetPrediction数据库获取VOMF活性成分和药物潜在靶点,应用GEO数据库获取HPAH疾病相关靶点,Cytoscape软件构建“成分-靶点-疾病”网络;运用Pymol和MOE软件对VOMF关键活性成分与作用靶点进行分子对接。采用雄性SD大鼠制备肺动脉平滑肌细胞(pulmonary artery smooth muscle cells,PASMCs),低氧处理并给予VOMF干预后,进行转录组学分析获取差异表达基因,采用Western blotting验证VOMF对细胞周期信号通路相关蛋白表达的影响。结果网络药理学分析共得到VOMF潜在作用靶点512个,HPAH疾病相关差异靶点2912个,交集基因80个;转录组学分析共得到40个共同差异表达基因。以P<0.05为筛选条件将转录组学和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)通路富集分析结果进行交集,得到交集通路8条,其中与HPAH密切相关的包括细胞周期信号通路、丝裂原活化蛋白激酶信号通路、缺氧诱导因子-1信号通路。结合文献报道和课题组前期研究,选取细胞周期信号通路进行验证。Western blotting结果显示,与对照组比较,模型组细胞周期蛋白依赖性激酶2(cyclin dependent kinase 2,CDK2)、CDK4、细胞周期蛋白D1(cell cycle protein D1,Cyclin D1)、Cyclin A2蛋白表达水平升高(P<0.01、0.001),p27Kip1蛋白表达水平降低(P<0.01);与模型组比较,VOMF组CDK2、CDK4、Cyclin D1、Cyclin A2蛋白表达水平降低(P<0.05、0.01、0.001),p27Kip1蛋白表达水平升高(P<0.05、0.01)。结论从网络药理学和转录组学角度初步阐明了VOMF能够通过干预细胞周期信号通路,进而干预HPAH的发生,可为后续的药理学研究和临床应用提供依据与参考。

关键词：肉豆蔻挥发油低氧肺动脉高压网络药理学转录组学 7,9-二叔丁基-1-氧杂螺[4.5]癸-6,9-二烯-2,8-二酮异榄香脂素乙酸香叶酯细胞周期信号通路

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