JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Huanxin Li,Junwei Zhang,Yonghui Dou,Li Xu,Guoji Liu
Data of liquid–liquid equilibria (LLE) for water + 1,6-hexanediamine + 1-butanol and water + 1,6-hexanediamine + 1-pentanol ternary systems were determined at T = 298.2, 308.2, and 318.2 K under atmospheric pressure. The distribution coefficients and selectivity factors calculated from LLE data were applied to evaluate the feasibility and effectiveness of extracting 1,6-hexanediamine from the aqueous solution. The results showed that the selectivity factors decrease with the amount of 1,6-hexanediamine increasing in the aqueous phase, and the effect of temperature is insignificant in this study. The nonrandom two-liquid and universal quasichemical activity coefficient models were also applied to regress the experimental equilibrium data of the two ternary systems and the root mean square deviation values between the correlated and experimental results were lower than 0.7%. It turned out that these phase equilibrium behaviors can be described by the two models. Meanwhile, the binary model parameters were acquired from the relevant process simulations.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Zilong Cui,Jingling Ye,Liang Yao,Zhi Wang,Ting Wang,Yonghong Hu
In this study, the data on solid–liquid equilibrium of l-prolinamide were studied using the gravimetric method. The solubility of l-prolinamide was measured in ten pure solvents (tetrahydrofuran, n-heptane, n-propanol, acetone, acetonitrile, ethyl acetate, N,N-dimethylformamide, n-hexane, cyclohexane, and isopropanol) and three binary solvent mixtures(ethyl acetate + tetrahydrofuran, n-heptane + ethyl acetate, and n-hexane + acetone) in the temperature range of 278.15–323.15 K at atmospheric pressure. The experimental values showed that the solubility increased with the increase of temperature in all solvents. The solubility data in different pure solvents were fitted using the modified Apelblat model and the Buchowski–Ksiazaczak λh model. For the solubility data of three binary solvent mixtures, the modified Apelblat model, the combined nearly ideal binary solvent/Redlich–Kister (CNIBS/R–K) model, and the Jouyban–Acree model were used to fit. In all four models, the modified Apelblat model had a better correlation with the solubility of l-prolinamide weather in pure solvents or binary solvent mixtures. The experimental results showed that n-heptane and n-hexane could be used as antisolvents, which could be used in the purification process of l-prolinamide and guide the large-scale production of many drugs such as Alpelisib in industries.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Chenyang Wen,Xianyang Meng,Kaixin Wei,Jiangtao Wu
The compressed liquid viscosities of 2-methylpentane, 3-methylpentane, and 2,3-dimethylbutane were measured using a vibrating-wire viscometer over the temperature range of (273 to 343) K and at pressures up to 40 MPa. The combined expanded uncertainty of the reported viscosity is about 2% with a confidence level of 0.95 (k = 2). An empirical Andrade–Tait equation was used to correlate the viscosity as a function of temperature and pressure with average absolute percentage deviations of 0.19%, 0.23%, and 0.25%, respectively.
✓ 已验证
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2024
·
IF 4.8
Haotian Xie,Zhaojiang Yin,Guobin Wei,Binghui Li,Hanfeng Cui,Hao Fan,Jing Zhang
This study developed a dual-mode “on-off-on” sensor based on a bipyridine ruthenium metal–organic framework (Ru-MOF) and dual enzyme cleavage technology for the sensitive detection of the K-ras gene. The sensor combines electrogenerated chemiluminescence (ECL) and fluorescence (FL) detection modes, achieving high sensitivity and specificity in detecting the K-ras gene through catalytic hairpin assembly (CHA) and dual enzyme cleavage reactions. Experimental results showed that the detection limits for the K-ras gene were 0.044 fM (ECL) and 0.16 fM (FL), demonstrating excellent selectivity and stability during detection. Through testing actual samples, the sensor has shown potential for application in complex biological environments. This method offers an efficient and reliable new tool for cancer diagnosis and treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Qian Wu,Tianyu Wang,Jingfang Zhou,Pifu Gong,Haochen Li,Haotian Tian,Mingjun Xia
With the increasing significance of the laser industry, especially in the 3–5 μm range, mid-infrared (mid-IR) nonlinear optical (NLO) crystals have become crucial components to meet stringent requirements. Herein, a large birefringence is essential for a mid-IR NLO crystal, as it ensures the phase-matching condition for high-conversion efficiency in laser output operation. In this study, three vanadium selenites A(VO2)3(SeO3)2 (A = NH4+, K+, and H3O+) with hexagonal tungsten oxide-related structures were prepared, featuring two-dimensional layered structures composed of two second-order Jahn–Teller (SOJT) motifs: distorted VO6 octahedra and SeO3 pyramids. Owing to the highly anisotropic VO6 octahedra and SeO3 pyramids, the family of A(VO2)3(SeO3)2 (A = NH4+, K+, and H3O+) crystals shows significant birefringence, which represents the highest birefringence value among vanadium selenites, even surpassing some SOJT-cation-based oxides. In addition, the title crystals exhibit large second harmonic generation responses of powder of 0.28–0.58 × AgGaS2 (AGS) at 2.09 μm.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Lilei Zhang,Ye Wang,Rongrong Hou,Qichao Sheng,Menghua Zhang,Jingxiao Zhang
This study investigates the density, speed of sound, viscosity, and excess properties of the binary mixture of Methyl tert-Butyl Ether (MTBE) and Isopropanol (IPA) at 0.1 MPa and various temperatures (293.15–313.15) K. These properties were measured across a range of temperatures to examine the thermodynamic behavior and molecular interactions in the MTBE–IPA system. Excess molar volumes, isentropic compressibility deviations, viscosity deviations, and free energy for activation for viscous flow were calculated to analyze the nature and extent of molecular interactions between MTBE and IPA. The results reveal notable deviations in excess properties, indicative of specific intermolecular forces, such as hydrogen bonding and van der Waals interactions, which govern the mixture’s behavior. Quantum mechanical calculations and analysis of weak interactions demonstrate that MTBE molecules primarily engage in van der Waals interactions, while IPA molecules form strong hydrogen bonds. Intermolecular interactions in the MTBE–IPA binary system exhibit characteristics intermediate between these two interaction types. This research provides valuable insights for applications in solvent formulation, chemical processing, and environmental science, where MTBE and IPA mixtures are commonly used.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Dan Fang,Xianyang Meng,Jiangtao Wu
The compressed liquid densities of binary mixtures of 1-butanol and diethylene glycol dimethyl ether (diglyme) have been measured over the temperature range from (283 to 363) K and at pressures up to 100 MPa covering the whole mole fraction of x1-butanol = (0, 0.3116, 0.5469, 0.7308, 0.8787, 1). The measurements were carried out using a high-pressure vibrating-tube densimeter with the combined expanded uncertainty (k = 2) of 0.6 kg·m–3. The experimental data were correlated using the modified Tait equation with an absolute average percentage deviation lower than 0.015% for each composition of the mixtures.
研究领域:
热力学
·
物理化学
·
高压流体性质
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Fan Yang,Qinqin Zhang,Hua Xin,Tianzhao Wu,Zhigang Zhang
Separating the mixture of the target product n-propyl acetate (NPAC) and the unreacted reactant n-propanol (NPA) is necessary during the production of NPAC. NPA and NPAC cannot be separated by simple distillation because the two could form an azeotrope under atmospheric pressure. Liquid–liquid extraction is an energy-saving and environment-friendly method for separating azeotropic mixtures. Ionic liquids (ILs) are promising alternatives to conventional extractants for separating azeotropes due to the advantages of designability and negligible vapor pressure. In this study, the liquid–liquid equilibrium (LLE) data for the ternary systems of NPAC + NPA + 1-butyl-3-methylimidazolium dihydrogen phosphate ([BMIM][H2PO4]) or 1-butyl-3-methylimidazolium thiocyanate ([BMIM][SCN]) or 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) were determined at 303.15 K and 101.3 kPa. The accuracy of the experimental LLE data was checked by the Bachman, Hand, and Othmer–Tobias equations. The selectivity and partition coefficient were calculated to evaluate the extraction capability of the selected extractants. The experimental LLE data were correlated with the nonrandom two-liquid model, and the binary interaction parameters were regressed. Finally, the separation mechanism of the three ILs was explored through σ-profile analysis.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Lingli Zhang,Chunjuan Huang
The solubility of 2-amino-5-bromopyrazine in the co-solvent mixtures of methanol, ethanol, isopropanol, and propylene glycol (PG) plus water and 10 monosolvents (methanol, ethanol, isopropanol, N,N-dimethylformamide (DMF), n-propanol, n-butanol, acetone, ethylene glycol (EG), PG, and water) was experimentally measured by the isothermal method at 278.15–323.15 K under 101.2 kPa. The temperature dominated the trend of solubility of 2-amino-5-bromopyrazine in pure and mixed solvents, especially high temperatures had a positive effect on dissolution. For the pure solvent system, the maximum solubility was obtained in DMF. For the mixed systems, isopropanol + water was superior to the other three combinations. The Apelblat model, van’t Hoff model, and NRTL model were used to correlate the solubility of 2-amino-5-bromopyrazine in 10 monosolvents. Furthermore, three thermodynamic co-solvency models including the Jouyban–Acree (JA) model, the Van’t Hoff–Jouyban–Acree (VJA) model, and the modified Apelblat–Jouyban–Acree (AJA) model were used to calculate the solubility data. This study would be helpful to the synthesis and purification processes of the final product.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Jingwei Cao,Hongyue Guo,Qingsong Li
Ternary liquid–liquid phase equilibrium (LLE) data of water + 3-pentanone + extractants (methyl tert-butyl ether, 2-ethyl-1-hexanol, o-xylene, ethyl acetate) were measured to separate 3-pentanone of high purity from aqueous solutions at 308.2 K under 101.3 kPa. The ability to extract 3-pentanone from aqueous solutions was assessed by distribution coefficient (D) and separation factor (S). Hand and Bachman equations tested the reliability of the experimental data with linear coefficients (R2) not less than 0.99. Meanwhile, UNIQUAC and NRTL thermodynamic models regressed experimentally measured data to get the optimal binary interaction parameters, and the root mean square deviation (RMSD) was not more than 0.4%. The GUI-MATLAB program verified the consistency of binary parameters obtained from the NRTL model well.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Ziyu Zhuang,Dongdong Li,Jinshun Lei,Dandan Gao,Dewen Zeng
Highly concentrated boron is widespread in salt lake brine and nuclear wastewater. Treatment of these aqueous solutions involves the solubility of extensive boron-containing minerals. Recently, we concentrated on the temperature-dependent solubility of the H3BO3 + salt + water system. Here, we systematically determined the ternary solubility isotherms in the H3BO3 + RbCl + H2O and H3BO3 + NH4Cl + H2O systems at T = (273.15, 298.15, 323.15, 348.15 and 363.15) K, using an isothermal equilibrium method. The results showed that both ternary systems belonged to a simple eutectic case. The solubility isotherms consisted of the solubility branches of H3BO3(cr) and RbCl(cr) or NH4Cl(cr). Using a revised Pitzer–Simonson–Clegg (rPSC) model implemented in the ISLEC software, these ternary solubility data were represented by fitting the interaction parameters between H3BO3 and RbCl and H3BO3 and NH4Cl. With the help of these models, polythermal phase diagrams of the two ternary systems are predicted.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Tongtong Wang,Jiyong Zheng,Jinjun Cai,Qiangqiang Liu,Xianxia Zhang
To improve the performance of graphitic carbon nitride (g-C 3 N 4 ), a hotly researched metal-free photocatalyst, for better application in the efficient removal of organic pollutants, adsorption synergistically enhanced photocatalysis mechanism was thoroughly explored. Based on KOH pore-forming activated biochar (ACB) and K + doped g-C 3 N 4 (K-gC 3 N 4 ), the novel activated biochar-based K-gC 3 N 4 composite (ACB-K-gC 3 N 4 ) was synthesized via the innovative ultrasonic-milling method. Rhodamine B (RhB), tetracycline (TC), norfloxacin (NOR), and chloramphenicol (CAP) were selected as target pollutants, and the effects of environmental factors, recycling and actual wastewater tests, disinfection effects, and various enhancement strategies were investigated. The results showed that K-gC 3 N 4 was successfully composited with ACB by various characterizations, where the loading mass ratio of 1:2 exhibited the best performance. ACB-K-gC 3 N 4 possessed a larger specific surface area, richer functional groups, suitable band gap (2.29 eV), and broader visible light absorption (~716 nm) than K-gC 3 N 4 . ACB-K-gC 3 N 4 presented effective removal efficiency over K-gC 3 N 4 for four pollutants, in which the removal efficiency of RhB reached 93.26%, and the degradation rate constant of 0.0119 min −1 was four times higher than K-gC 3 N 4 (0.0029 min −1 ). Moreover, ACB-K-gC 3 N 4 was superior to K-gC 3 N 4 in disinfecting S. aureus and E. coli , with a sterilization rate of exceeding 90% for 12 h. The photodegradation activity was dominated by · O 2 − , h + , and · OH, and the mechanisms involved in the three stages. This was attributed to the unique structure and surface properties (defects and persistent free radicals) of ACB, as evidenced by improved adsorption stage and transfer of degradation intermediates, facilitated the generation of active species, accelerated migration of photogenerated electrons, and inhibited photogenerated carriers recombination by the heterojunction . The good reusability and stability, enhancement strategies (blowing air and heating), and satisfactory feasibility for actual wastewater allow ACB-K-gC 3 N 4 possible to promote high-concentration wastewater treatment and disinfection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）