JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Jingli Sun,Yujie Zhen,Siyu Zheng,Lei Chen,Kebin Huang,Yingmin Yu
Abstract To investigate salt-type and salt-concentration effects on pyridine extraction performance, liquid–liquid equilibrium data for the aqueous pyridine +2-ethyl-1-hexanol system with KCl or CaCl2 were measured at 298.15 K and 101.3 kPa. Aqueous phases containing 5 and 10 wt % KCl and CaCl2 were systematically studied. Experimental results show that both inorganic salts expand the two-phase region, promote pyridine partitioning into the rich-organic phase, and enhance separation efficiency. The pyridine distribution coefficient and separation factor generally increase with the salt concentration. Relative to the salt-free system, the average separation factor rises by approximately 42.01% and 111.10% for 5 and 10 wt % KCl, respectively, and by 19.17% and 74.27% for the corresponding CaCl2 concentrations, respectively. Experimental LLE data were correlated using NRTL and UNIQUAC activity coefficient models, with RMSD below 1.02%. Thermodynamic consistency tests and Gibbs stability criteria further validate the reliability of the regressed model parameters. This work provides credible LLE data sets and thermodynamic model parameters for the design and optimization of pyridine extraction and separation processes in saline aqueous systems.
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高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Xinxin Lv,Yan Hong,Zhengbiao Gu,Li Cheng,Zhaofeng Li,Caiming Li,Xiaofeng Ban
Starch-lipid complexes have potential applications in functional foods, food additives, and food packaging materials. High-amylose corn starch (HACS) is a promising raw material for starch-lipid complexation. To overcome the poor gelatinization of HACS under atmospheric pressure, we leveraged the capacity of a CaCl 2 aqueous solution to dissolve HACS, thereby streamlining the preparation of HACS-lipid complexes. Taking myristic acid (MA) as example, the HACS-MA (H-MA) complex prepared in deionized water exhibited a complexing index (CI) of 36.15 %, whereas that prepared in CaCl 2 aqueous solution achieved a significantly higher CI of 89.03 %. Chemical group analysis and thermal characterization indicated that Ca 2+ ions not only enhanced HACS dissolution through metal-dipole interactions but also bound to the hydroxyl oxygen atoms of starch, forming a coordination structure that promoted a single helical arrangement. This study clarifies the mechanism of starch-lipid complexation in CaCl 2 aqueous solution and defines the role of Ca 2+ ions in the complexes.
研究领域:
食品化学
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高分子科学
·
材料科学
·
物理化学
·
食品科学
·
生物大分子络合
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Mengxue Sun,Qing Sun,Jiawei Sheng
The development of efficient and stable catalysts for peroxymonosulfate (PMS) activation is essential for the removal of persistent pharmaceutical pollutants such as 5-fluorouracil (5-FU). In this work, a novel, economical, and facile one-step molten salt synthesis strategy is developed to simultaneously etch the MAX phase (Mo 2 TiAlC 2 ) and in-situ anchor multiple cobalt-active species, leading to the direct formation of multi-interfacial Co/Mo-carbide/oxide hybrids. By employing a CaCl 2 /CoCl 2 molten salt system at 800 °C—which acts as both etchant and reaction medium—selective delamination of Al layers is achieved to produce Mo 2 TiC 2 MXene nanosheets, while catalytically active phases (Mo 3 Co 3 C, Co, and Mo 2 C) are generated in situ. Comprehensive characterization confirms the successful construction of abundant heterogeneous interfaces among these phases. The unique multi-interfacial architecture synergistically enhances electron transfer and exposes numerous active sites, thereby enabling highly efficient PMS activation. As a result, the hybrid catalyst exhibits exceptional performance in degrading 5-FU, with high degradation efficiency and rapid reaction kinetics. Radical quenching tests and electron paramagnetic resonance (EPR) analyses reveal that both radical (SO 4 • − , •OH, O 2 • − ) and non-radical ( 1 O 2 ) pathways act synergistically in the degradation process. This study offers a green and efficient “forging” strategy for designing MXene-derived composites with tunable compositions and interfaces. It not only avoids the use of fluorides but also introduces CaCl 2 as a novel molten salt etchant, demonstrating great potential for advanced oxidation processes and other applications.
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高影响因子
JOM
·
2018
·Vol. 70
·期 4
·575-580
·
IF 2.145
Zhou Zhongren,Zhang Yingjie,Hua Yixin,Xu Cunying,Dong Peng,Zhang Qibo,Wang Ding
The effect of CaO content on the preparation of ferrotitanium alloys from ilmenite with the method of the electrolysis-assisted calciothermic reduction has been investigated by use of ilmenite powders as raw materials that positions them next to the cathodic molybdenum plate,
equimolar CaCl 2 -NaCl molten salt with 2–7 mol.% CaO as electrolyte and graphite as anode at 700°C with cell voltage of 2.8 V under argon atmosphere.
It is demonstrated that increasing the reactant CaO content is beneficial to the calciothermic reduction of ilmenite and the intermediate CaTiO 3 . Experimental results also show that after 14 h of calciothermic reduction process, the products are ferrotitanium alloys and the specific energy consumption is only about 10.21 kWh kg −1 when adding 5 mol.% CaO into equimolar CaCl 2 -NaCl molten salt and approximately 14.40 kWh kg −1 when CaO content is increased to 7 mol.%.
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高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2019
·Vol. 55
·期 2
·601-609
·
IF 2.281
Yu Wang,Ying Zhou,Xi-xi Wang,Pei-jun Li,Bao-cai Xu,Cong-gui Chen
Summary The water holding capacity (WHC) of sodium-reduced (0.3 m sodium chloride, corresponding to the salt percentage (w/v) of 1.755%) myofibrillar protein (MP) gel in response to combined calcium chloride (CaCl 2 , 20, 60, 100 m m ) and high-pressure processing (HPP, 200 MPa, 10 min) was investigated. The results showed that 200 MPa + 20 m m CaCl 2 synergistically increased the WHC of MP gel via reducing particle size of MP solutions, strengthening hydrogen-bonding and disulphide-bonding, promoting formation of β-sheet and uncoiling of α-helix, exposing tryptophan residues, enhancing hydrophobic interactions of aliphatic residues and forming a compact and continuous networked gel structure. However, high concentrations (≥60 m m ) of CaCl 2 could attenuate the enhancing effects of HPP on the WHC by inducing decreased hydrogen bonds, fewer tryptophan residues exposed and coarser and aggregated gel structures with large cavities. Therefore, a combined moderate HPP and low concentration of CaCl 2 is a potential alternative for developing sodium-reduced meat products.
研究领域:
食品科学
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蛋白质化学
·
肉类加工技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Liwei Zhuang,Qinqin Hu,Shujing Wang,Ruyi Lin,Dan Li,Yong Ma,Lingzong Meng,Jiaoyu Peng
The solid–liquid phase equilibria of brine systems containing boric acid are the theoretical basis for the development of boric acid from brine resources. The phase equilibria of the systems NaCl–CaCl2–H3BO3–H2O and CaCl2–H3BO3–H2O at 323.15 K were investigated by the isothermal solution method. The phase diagram for the ternary system is composed of one co-saturation point, two univariant solubility curves, and two singe-salt crystallization fields of CaCl2·2H2O and H3BO3. The dry-salt phase diagram for the quaternary system consists of one invariant point, three univariant solubility curves, and three single-salt crystallization fields for NaCl, CaCl2·2H2O, and H3BO3. In the phase diagrams of the quaternary system at 298.15 and 323.15 K, the areas of sodium chloride and calcium chloride salt regions are enlarged, whereas the area of the H3BO3 region is diminished significantly with the increase of temperature. Using the Pitzer model, the lacking Pitzer parameters for H3BO3 were obtained by fitting the solubilities in the CaCl2–H3BO3–H2O system. The calculated solubilities with the Pitzer model were in accord with the experimental data.
研究领域:
化学热力学
·
无机化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Shuaifeng Liu,Edouard Asselin,Zhibao Li
The disposal of titanogypsum, also known as red gypsum, which is generated during the titanium dioxide sulfate process, has become a significant environmental challenge. We propose a new process to recover iron impurities such as FeCl2·4H2O and to convert titanogypsum to saleable hemihydrate gypsum. For this purpose, we use HCl–FeCl2 solution generated via the reaction of H2SO4–FeSO4 with CaCl2 to leach iron hydroxide from titanogypsum. The hemihydrate precipitation and phase-transition kinetics of the reaction of HCl–H2SO4–FeSO4 with CaCl2 are experimentally investigated at 353 K. The common ion effect of CaCl2 in the FeCl2 solution for FeCl2·4H2O crystallization is predicted by NRTL modeling of the solid–liquid equilibria of the FeCl2–CaCl2–H2O system. High-quality, saleable α-gypsum and FeCl2·4H2O solids obtained by treating titanogypsum samples provided by a commercial processing plant further shows that the new process is feasible.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhijin Wang,Qiongfen Yu,Ming Li,Fen Jiang,Lei Shu,Shengnan Sun,Danya Zhan,Zhongfan Mo,Zhihao Song,Runfang Ma,Meidi Ding,Hui Yao
Sorption-based atmospheric water harvesting (SAWH) offers a solution to global freshwater shortages that is not restricted by geographical conditions. However, in the current research, there are still problems such as the excessively high cost of adsorbents and the fact that photothermal materials only increase the desorption temperature during the desorption stage, without playing a role in the adsorption stage or even having a negative impact on it. This paper choses to use low-cost materials: renewable polysaccharides, potato starch (PS), bulk polymers, polyethylene glycol (PEG) as the framework, low-cost hygroscopic agent (CaCl 2 ) was employed as the moisture sorbing component, and MXene as the photothermal component to prepare high-performance sorbents materials (PPMC) through freeze-drying. MXene integration enabled dual functionality. During adsorption, it simultaneously enhanced kinetics and saturated capacity PPMC. Compared to PPC without MXene, PPMC's initial adsorption rate increased from 6.2 mg/g·min to 13.93 mg/g·min, representing an increase of 125 %, its saturated adsorption capacity increased substantially from 0.93 g/g to 1.47 g/g (59 % enhancement). During desorption, MXene's surface plasmon resonance confers exceptional photothermal conversion capability. Under 0.5 sun illumination (500 W/m 2 ), the material reaches 47 °C within 10 min and stabilizes at 71.1 °C after 2.5 h, enabling rapid vapor liberation. Water production validation using a compact system in arid environments (avg. 34.78 % RH, 19.7 °C) demonstrates successful freshwater harvesting. Post-collection analysis confirms compliance with WHO drinking water standards, which establish a cost-effective strategy for atmospheric water harvesting in resource-constrained scenarios.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Jian-nan Yin,Xin-ying Shi,Huan Zhou,Jing-jing Tang,Ya-ping Dai,Xiao-qin Bai
Fine calcium hypophosphite can be synthesized by sodium hypophosphite and calcium chloride via the replacement reaction, and sodium hypophosphite can be synthesized from phosphorus via the intermediate of Ca(H2PO2)2. Both processes involve the interactive quaternary system of (Ca2+ + Na+)//(Cl– + (H2PO2)− + H2O) and its subsystems. In this study, the (solid + liquid) phase diagrams of the (Ca(H2PO2)2 + H2O) binary system from freezing to boiling point at normal pressure, and (Ca(H2PO2)2 + CaCl2 + H2O), (Ca(H2PO2)2 + NaH2PO2 + H2O) ternary systems at 273.15 K were experimentally determined via the classical isothermal solubility equilibrium method. It was found that (1) one anhydrous salt of Ca(H2PO2)2 occurs in (Ca(H2PO2)2 + H2O) binary systems with temperatures ranging from freezing to boiling points, (2) two solid salts of Ca(H2PO2)2 and CaCl2·6H2O exist in the (Ca(H2PO2)2 + CaCl2 + H2O) system, and (3) Ca(H2PO2)2, NaH2PO2·H2O and one incompatible double salt of NaCa(H2PO2)3 exist in the (Ca(H2PO2)2 + NaH2PO2 + H2O) system, and NaCa(H2PO2)3 has very low solubility and occupies a large solid field in the ternary system.
研究领域:
无机化学
·
化学热力学
·
相平衡
·
材料合成
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xiaoxiao Wei,Yuzhi Wang,Jing Chen,Ziwei Liu,Fangting Xu,Xiyan He,Heqiong Li,Yigang Zhou
Seeking effective synthesis strategy of adsorbents with di-selective adsorption ability to remove dyes in wastewater is of great significance for solving the increasing environmental problems. Hence, three deep eutectic solvents (DESs) were synthesized and polymerized on the surface of magnetic (Fe 3 O 4 ) polydopamine (MPDA), in which DES acted as both stabilizer and surface modifier for PDA coating. The fabricated nanoparticles (named as MPDA-PDES) were used as adsorbents for selective adsorption of binary dyes solution. Langmuir and Dubinin-Radushkevich isotherm models were suitable to describe adsorption process of malachite green (MG) and sunset yellow FCF (SY) on MPDA-PDES 1 , respectively, indicated that the adsorption of MG was monolayer uptake, and that of SY was physical adsorption. The effect of solution pH and ionic strength suggested that electrostatic interaction was mainly adsorption driving force. Interestingly, the addition of CaCl 2 in adsorption system realized dynamic transformation from selective adsorption of MG by MPDA-PDES 1 to selective adsorption of SY. And selectivity factor reduced from 37.57 to 0.30. MPDA-PDES 1 adsorbent possessed excellent anti-interference ability, regeneration and reusability, can be continuously reused six times and adsorption capacity remained basically unchanged. The adsorption of MG-SY from synthetic wastewater manifested that MPDA-PDES 1 had unlimited potential for selective removal of target dyes in actual wastewater. Mechanism exploration revealed that MPDA stabilized by DES containing long-chain alkyl groups exhibited better selective adsorption capacity for cationic dyes in binary dyes solutions. This was due to the synergistic effect of electrostatic interaction, hydrophobic interaction, hydrogen bonding and π-π stacking between MPDA-PDES 1 and dyes. Therefore, proposed DES-based PDA modification strategy improved the stability and reusability of PDA materials, and achieved outstanding selective adsorption ability because of tailorability of DES structure, which provided new ideas for design and synthesis of high-efficiency adsorbents.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Enmin Zong,Xiaohuan Liu,Lina Liu,Jifu Wang,Pingan Song,Zhongqing Ma,Jie Ding,Shenyuan Fu
Effective utilization of abundant industrial lignin has growingly attracted much attention besides potential environmental issues. Although chemical graft polymerization modification is one facile strategy for extending its applications, it remains an intractable challenge to select a highly efficient initiation system. We herein have attempt to understand the CaCl2–H2O2 system in initiating the graft polymerization of acrylic monomers onto acetic acid lignin (AAL) and biobutanol lignin (BBL). The initiation system is found to be highly efficient and selective, as proved by the successful graft of polyacrylates onto them, and a possible mechanism is also proposed. Thermal analysis shows that the graft modification results in a higher glass transition temperature and higher thermal stability of lignin. The graft modification make both AAL and BBL become more hydrophobic than before modification. Moreover, adding a small amount of lignin-graft-polyacrylate can considerably improve the UV blocking capability in addition to the reinforcing effect on polylactic acid. This work offers a novel, highly effective, and selective free radical initiation system for functionalizing lignin.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 6
·063503
·
IF 3.1
Beihu Lu,Muya Cai,Xiang Chen,Huayi Yin
Titanium alloys have been widely used in bone implants, but the mechanical properties, elastic modulus mismatch between bone and metal, and stress shielding effects can occur. However, porous materials can effectively overcome this problem. In recent years, porous structures have attracted enough attention from researchers. Adjustment of the porous structure may make the titanium alloys better able to meet the requirements of the implant. In this study, we have successfully prepared Ti-6Al-4V alloys by combining powder metallurgy with electrolysis in molten salt. At the same time, CaCl2 was used as a sacrificial space holder to adjust the porosity and porous structure. The Ti-6Al-4V alloys prepared by this method contain 29%–60% porosity and elastic modulus has been controlled between 1.8 GPa to 7.8 GPa, which is suitable for cancellous bone, trabecular, and other parts with low elastic modulus. In addition, the higher porosity also showed better corrosion resistance in the Hank's solution. The potentiodynamic polarization curves show that the corrosion resistance increases significantly with an increase in porosity.
研究领域:
材料科学
·
生物医学工程
·
腐蚀科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）