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Oxygen content of high ferrotitanium prepared by thermite method with different melt separation temperatures
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作者 Chu Cheng Zhi-He Dou +4 位作者 Ting-An Zhang Jian-Ming Su Hui-Jie Zhang Yan Liu Li-Ping Niu 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第9期892-898,共7页
High ferrotitanium prepared directly by the thermite method has a disadvantageously high O content(≥10 wt%)because of the short slag-metal separation time.In this study,CaO and CaF2 are added to the melt to improve t... High ferrotitanium prepared directly by the thermite method has a disadvantageously high O content(≥10 wt%)because of the short slag-metal separation time.In this study,CaO and CaF2 are added to the melt to improve the basicity of the slag and melt separation under heat preservation is performed to strengthen slag-metal separation.The thermodynamics of the step-by-step reduction process of TiO2 in the Ti-Al-Fe-Si-O system whose composition is close to the alloy after melt separation were calculated.Samples of alloys and slags before and after melt separation were systematically analyzed.The result indicates that the reaction that TiO is reduced by Al to Ti is the limited step in the reduction process of TiO2.The O content of the alloys slightly decreases with temperature from 1873 to 2023 K,which agrees with the changes in the law of deoxidation limit.It is mainly attributed to the movement of chemical reactions in the alloy melt at different temperatures and slag-metal interfacial reaction.The addition of Al2 O3-CaO-CaF2 slag and high temperature promote the removal of Al2 O3 and titanium suboxides.The minimum contents of O and Al in the alloy reach 1.84 wt% and 3.26 wt%,respectively. 展开更多
关键词 HIGH FERROTITANIUM OXYGEN content MELT SEPARATION Slag-metal SEPARATION THERMITE method
Effect of ethylene vinyl acetate content on the performance of VMD using Check foi HDPE co-blending membrane
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作者 Na Tang Xinxin Hua +5 位作者 Zhao Li Lei Zhang Jiating Wang Jun Xiang Penggao Cheng Xuekui Wang 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第5期1058-1066,共9页
Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membrane... Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membranes were supported by non woven polyester fabric with a special cellular structure. Different membrane samples were obtained by adjusting the polymer concentration, HDPE/EVA weight ratio, and coagulation bath temperature. The membranes were characterized by scanning electron microscopy (SEM) analysis, contact angle test, and evaluation of porosity and pore size distribution. A series of VMD tests were conducted using aqueous NaCI solution (0.5 mol·L^-1) at a feed temperature of 65 ℃ and permeate side absolute pressure of 3 kPa. The membranes showed excellent performance in water permeation flux, salt rejection, and long-term sta-bility. The HDPE/EVA co-blending membranes exhibited the largest permeation flux of 23.87 kg·m^-2·h^-1, and benign salt rejection of ≥99.9%. 展开更多
关键词 Thermally induced phase SEPARATION HIGH-DENSITY polyethylene ETHYLENE VINYL ACETATE MEMBRANE SEPARATION Microstructure
Separation of mixed salts(Cl^-/SO4^2-) by ED based on monovalent anion selective membranes
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作者 Jiefeng Pan Wei Zhang +2 位作者 Huimin Ruan Jiangnan Shen Congjie Gao 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第4期857-862,共6页
The industrial products or wastewater rich in the mixed salts(Cl-/SO4^2-) not only causes the environmental damage, but also induces waste of resource. In this study, an ED stack with monovalent selective AEMs and con... The industrial products or wastewater rich in the mixed salts(Cl-/SO4^2-) not only causes the environmental damage, but also induces waste of resource. In this study, an ED stack with monovalent selective AEMs and conventional CEMs was employed to separate the Cl-and SO42-from simulated wastewater. The effect of current density and mass fraction percentage was investigated in order to optimize the experimental conditions during ED process. It was found that at a concentration ratio between NaCl and Na2SO4 of 95/5(wt%/wt%) and a current density of40 m A·cm^-2, a current efficiency of 72%, an energy consumption of 1.6 k W·h·kg^-1 Na Cl and a Cl-/SO4^2-concentration(67.5/3.5 g·L^-1) were obtained. Hence, it is appropriate and effective to separate Cl-and SO42-by ED using the monovalent selective AEMs. 展开更多
关键词 ELECTRODIALYSIS SEPARATION of the mixed SALTS Monovalent SELECTIVE AEMs Ion SEPARATION
Determination of optimal grid opening width for herringbone water-sediment separation structures based on sediment separation efficiency
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作者 XIE Xiang-ping WEI Fang-qiang +1 位作者 WANG Xiao-jun YANG Hong-juan 《山地科学学报:英文版》 SCIE CSCD 2019年第3期619-629,共11页
The herringbone water-sediment separation structure(HWSSS) was developed to prevent debris flows. This paper mainly focuses on evaluating the sediment separation efficiency of HWSSS in debris flow prevention and deter... The herringbone water-sediment separation structure(HWSSS) was developed to prevent debris flows. This paper mainly focuses on evaluating the sediment separation efficiency of HWSSS in debris flow prevention and determining the grid opening width D, a crucial structure parameter for HWSSS design. Theoretical analysis on the total sediment separation rate Pt reveals that the efficiency of sediment separation is much related with sediment grain size distribution(GSD) and grid opening width. The lower limit of Pt is deduced from the perspective of safety consideration by transforming debris flow into sediment-laden flow. Hydraulic model tests were carried out. Based on the regression analysis of the experimental data, the quantitative relationships between Pt and D and GSD characteristic values were finally established. A procedure for determining optimal grid opening width is proposed based on these analyses. These results are of significance in evaluating sediment separation effect by HWSSS in debris flow prevention and contribute to a more explicit methodology for design of HWSSS. 展开更多
关键词 Debris flow Water-sediment SEPARATION Structure design SEDIMENT SEPARATION efficiency GRID OPENING WIDTH
Magnetically Driven Superhydrophobic Polyurethane Sponge for High Efficiency Oil/Water Mixtures Separation
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作者 Xuemei Zhang Feng Fu +1 位作者 Xiaoming Gao Xiufang Hou 《仿生工程学报:英文版》 SCIE EI CSCD 2019年第1期38-46,共9页
Magnetically driven super-hydrophobic materials were prepared by Fe3O4 nanoparticles and stearic acid,which were deposited on the surface of polyurethane sponges.The presence of the Fe3O4 nanoparticles makes the spong... Magnetically driven super-hydrophobic materials were prepared by Fe3O4 nanoparticles and stearic acid,which were deposited on the surface of polyurethane sponges.The presence of the Fe3O4 nanoparticles makes the sponge have the magnetic,and the micro-nano hierarchical structure and hydrophobic functional groups lead to the sponge have excellent superhydrophobicity.The as-prepared sponge exhibited excellent absorption capacities for various oils and organic solvents ranging from 23.8 times to 86.7 times of its own weight.Moreover,the oil separation capacities still keep a high value after 50 cycles of squeezing the saturated absorbed as-prepared sponge.All of these satisfactory properties make the as-prepared sponge as a candidate of ideal absorbents for oily industrial wastewater and oil spills in oceans. 展开更多
关键词 superhydrophobic/superoleophilic materials POLYURETHANE SPONGE magnetic DRIVEN oil-water SEPARATION continuous SEPARATION
锥体开缝对水力旋流器固液分离性能的影响 预览
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作者 段继海 黄帅彪 +2 位作者 高昶 陈阿强 黄青山 《化工学报》 EI CAS CSCD 北大核心 2019年第5期1823-1831,共9页
设计了一种新型锥体切向开缝结构的水力旋流器,并针对锥体开缝长度、位置、数量以及开缝型式对水力旋流器分离性能的影响开展了实验研究。研究结果表明:锥体开缝会使水力旋流器的压降大幅降低;开缝长度由10mm增大到50mm的过程中,分离效... 设计了一种新型锥体切向开缝结构的水力旋流器,并针对锥体开缝长度、位置、数量以及开缝型式对水力旋流器分离性能的影响开展了实验研究。研究结果表明:锥体开缝会使水力旋流器的压降大幅降低;开缝长度由10mm增大到50mm的过程中,分离效率呈现先增大后减小的趋势,开缝长度为20mm时最佳;第二条缝隙的开缝位置由锥体底部向上移动的过程中,分离效率也呈现出先增大后减小的趋势,距底部缝隙80mm时分离效率最高;保持出口截面积不变,在底部开6mm长的缝隙,另外在最佳开缝位置处开一条长缝隙时的分离效率最高,且与底部缝隙呈反方向分布是最优的开缝型式,与常规水力旋流器对比,在高流量下其分离效率仅降低了1.48%,但压降降低可达36.84%,节能效果显著,具有重要的应用价值。 展开更多
关键词 分离 实验验证 流动 水力旋流器 开缝结构 压降 分离效率
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分子筛用于丙炔/丙烯的高效分离 预览
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作者 贺朝辉 杨玲 +1 位作者 李晋平 李立博 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2019年第5期855-859,共5页
为解决传统的丙炔/丙烯分离能耗高,制约丙烯生产效率的问题,探讨了几种孔径尺寸接近的5A分子筛、4A分子筛和Silicalite-1分子筛对丙炔/丙烯的分离性能,通过吸附分离的方式,实现了高效的丙炔/丙烯分离。详细考察了5A分子筛、4A分子筛和Si... 为解决传统的丙炔/丙烯分离能耗高,制约丙烯生产效率的问题,探讨了几种孔径尺寸接近的5A分子筛、4A分子筛和Silicalite-1分子筛对丙炔/丙烯的分离性能,通过吸附分离的方式,实现了高效的丙炔/丙烯分离。详细考察了5A分子筛、4A分子筛和Silicalite-1分子筛在273 K和298 K下对丙炔/丙烯的单组分吸附性能,并进行了选择性计算。对5A分子筛、4A分子筛和Silicalite-1分子筛进行了模拟固定床的丙炔/丙烯(V(C 3H 4)∶V(C 3H 6)=1∶99)混合气穿透实验。结果表明,5A分子筛具有最优的分离效果。实现了基于分子筛对丙炔/丙烯的高效分离,为分子筛在低碳烃的分离应用提供了新的方向。 展开更多
关键词 分子筛 丙烯 丙炔 吸附 分离
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重整装置二甲苯塔增开侧线的方案比较 预览
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作者 孙学锋 《当代化工》 CAS 2019年第6期1286-1289,共4页
利用Aspen软件对天津分公司重整装置二甲苯塔增开侧线采出进行了模拟,对塔顶产品纯度、侧线采出油及塔底油性质及装置能耗进行了比较,结果表明,重整装置二甲苯塔增加侧线气相采出,塔顶产品纯度符合要求,侧线汽油馏分符合汽油标准,可作... 利用Aspen软件对天津分公司重整装置二甲苯塔增开侧线采出进行了模拟,对塔顶产品纯度、侧线采出油及塔底油性质及装置能耗进行了比较,结果表明,重整装置二甲苯塔增加侧线气相采出,塔顶产品纯度符合要求,侧线汽油馏分符合汽油标准,可作为汽油调合组分使用,与增加重芳烃分离塔的工艺流程相比流程简单,每小时可以节省3.5 MPa蒸气6.5 t,年可节省费用1 400万元。 展开更多
关键词 重整 二甲苯塔 侧线 模拟 重芳烃 分离
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DEHPA在Petrofin中萃取分离La(Ⅲ)和Ni(Ⅱ)的动力学与机理 预览
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作者 Swagatika SATPATHY Sujata MISHRA 《中国有色金属学报:英文版》 SCIE EI CAS CSCD 2019年第7期1538-1548,共11页
采用界面积恒定的连续搅拌萃取池,研究在乳酸存在条件下,以用Petrofin 稀释的二-2-乙基己基磷酸(DEHPA)作萃取剂从硝酸盐介质中萃取分离La(Ⅲ)与Ni(Ⅱ)的动力学。考察搅拌速度、界面积、pH 值、乳酸浓度、萃取剂浓度、金属离子浓度和温... 采用界面积恒定的连续搅拌萃取池,研究在乳酸存在条件下,以用Petrofin 稀释的二-2-乙基己基磷酸(DEHPA)作萃取剂从硝酸盐介质中萃取分离La(Ⅲ)与Ni(Ⅱ)的动力学。考察搅拌速度、界面积、pH 值、乳酸浓度、萃取剂浓度、金属离子浓度和温度对萃取速率的影响。结果表明,该萃取体系是受扩散控制的,界面反应为速率控制步骤。两种金属离子的萃取速率均与pH 值无关。La(Ⅲ)和Ni(Ⅱ)的萃取速率与乳酸浓度和金属离子(La(Ⅲ)或Ni(Ⅱ))浓度呈线性关系。La(Ⅲ)的萃取速率与DEHPA 浓度呈线性关系,而Ni(Ⅱ)的萃取速率则与DEHPA 浓度的1.5 次方呈线性关系。在低界面积和低搅拌速度的条件下,从硝酸盐溶液中分离La(Ⅲ)和Ni(Ⅱ)是可行的。 展开更多
关键词 萃取 分离 动力学 机理 La(Ⅲ) Ni(Ⅱ)
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海洋生物海绵中溴吡咯生物碱的研究进展 预览
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作者 高荔 《药学研究》 CAS 2019年第10期600-607,共8页
海洋生物海绵是海洋中最简单的动物,从海绵中分离纯化出的溴吡咯生物碱,是众多海洋学家和天然药物学家的研究对象,在系统地归纳和整理了大量文献资料和实验数据的基础上,本文将对近年来海洋生物海绵中的溴吡咯生物碱在提取分离和合成方... 海洋生物海绵是海洋中最简单的动物,从海绵中分离纯化出的溴吡咯生物碱,是众多海洋学家和天然药物学家的研究对象,在系统地归纳和整理了大量文献资料和实验数据的基础上,本文将对近年来海洋生物海绵中的溴吡咯生物碱在提取分离和合成方面的研究进展进行综述。 展开更多
关键词 海绵 溴吡咯生物碱 分离 合成
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Superhydrophobic Micro/Nanostructured Copper Mesh with Self-Cleaning Property for E ective Oil/Water Separation 预览
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作者 Tai-heng Zhang Tao Yan +2 位作者 Guo-qing Zhao Wenjihao Hu Fei-peng Jiao 《化学物理学报》 SCIE CAS CSCD 2019年第5期635-642,共8页
In this work, a simple method was carried out to successfully fabricate superoleophilic and superhydrophobic N-dodecyltrimethoxysilane@tungsten trioxide coated copper mesh. The as-fabricated copper mesh displayed prom... In this work, a simple method was carried out to successfully fabricate superoleophilic and superhydrophobic N-dodecyltrimethoxysilane@tungsten trioxide coated copper mesh. The as-fabricated copper mesh displayed prominent superoleophilicity and superhydrophobicity with a huge water contact angle about 154.39° and oil contact angle near 0° Moreover, the coated copper mesh showed high separation efficiency approximately 99.3%, and huge water flux about 9962.3 L·h^-1·m-2, which could be used to separate various organic solvents/ water mixtures. Furthermore, the coated copper mesh showed favorable stability that the separation efficiency remained above 90% after 10 separation cycles. Benefiting from the excellent photocatalytic degradation ability of tungsten trioxide, the coated copper mesh possessed the self-cleaning capacity. Therefore, the mesh contaminated with lubricating oil could regain superhydrophobic property, and this property of self-cleaning permitted that the fabricated copper mesh could be repeatedly used for oil and water separation. 展开更多
关键词 SUPERHYDROPHOBICITY MICRO/NANOSTRUCTURE TUNGSTEN TRIOXIDE SELF-CLEANING Oil/water separation
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钽铪在硫酸体系下的浸出分离研究 预览
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作者 高凯 张卜升 +4 位作者 王靖坤 许万祥 李波 李进 周严 《有色金属:冶炼部分》 CAS 北大核心 2019年第6期49-51,共3页
针对钽、铪分离多采用HF体系,易造成环境污染这一现状,以某牌号含钽、铪合金渣为原料,采用焙烧+浓硫酸浸出工艺对钽、铪的分离进行研究。试验表明,当合金渣与碳酸钠质量比为1∶1、焙烧温度1000℃、浓硫酸与合金渣体积质量为1∶1、浸出时... 针对钽、铪分离多采用HF体系,易造成环境污染这一现状,以某牌号含钽、铪合金渣为原料,采用焙烧+浓硫酸浸出工艺对钽、铪的分离进行研究。试验表明,当合金渣与碳酸钠质量比为1∶1、焙烧温度1000℃、浓硫酸与合金渣体积质量为1∶1、浸出时间1h时,钽、铪的分离效率最高,可实现钽与铪的有效分离。 展开更多
关键词 分离 硫酸
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AgBF4/[emim][BF4] supported ionic liquid membrane for carbon monoxide/nitrogen separation 预览
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作者 Shichao Feng Yuanyuan Wu +1 位作者 Jianquan Luo Yinhua Wan 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第2期31-39,共9页
In this paper,AgBF4/[emim][BF4] supported ionic liquid membranes(SILMs) were prepared successfully for CO/N2 separation using nitrogen pressure immobilization procedures.The incorporation of AgBF4 could decrease membr... In this paper,AgBF4/[emim][BF4] supported ionic liquid membranes(SILMs) were prepared successfully for CO/N2 separation using nitrogen pressure immobilization procedures.The incorporation of AgBF4 could decrease membrane weight loss,improve the pressure-resistant ability,and keep the critical pressure(0.45 MPa) of the SILMs.The high viscosity and undissolved Ag BF4 solids in membrane liquid would disturb gas molecular transport through membrane and give rise to the gas transport resistance.Therefore,the gas permeability decreased remarkably with increasing AgBF4 carrier content in the membrane.When the molar ratio of AgBF4 to [emim][BF4] increased from 0:1 to 0.3:1,the CO/N2 selectivity of the SILMs showed a great increase from ~1 to ~9 at 20 °C and 0.4 MPa,suggesting that AgBF4 was an effective carrier for CO facilitated transport.The permeabilities of N2 and CO increased at higher transmembrane pressure,indicating that molecular transport would dominate the transport process at high pressure.The temperature-dependent gas permeability followed the Arrhenius equation.Moreover,the differences between the activation energies of CO and N2 became larger after introducing AgBF4,resulting in more obvious decrease in the CO/N2 selectivity at higher operating temperature. 展开更多
关键词 SUPPORTED IONIC liquid membranes [emim][BF4] AgBF4 Carbon MONOXIDE SEPARATION
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地龙抗血栓肽分离研究 预览
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作者 王佳茜 王少平 刘万卉 《天津药学》 2019年第3期1-4,共4页
目的:采用多种方法对地龙酶解液进行分离,得到抗血栓肽。方法:以尿激酶作为对照药物,建立体外活性测定方法;同时采用folin法进行多肽含量测定,采用电渗析法、超滤法、DA201-C树脂法、sephadexG15凝胶分离法、HPLC分离法对地龙酶解液进... 目的:采用多种方法对地龙酶解液进行分离,得到抗血栓肽。方法:以尿激酶作为对照药物,建立体外活性测定方法;同时采用folin法进行多肽含量测定,采用电渗析法、超滤法、DA201-C树脂法、sephadexG15凝胶分离法、HPLC分离法对地龙酶解液进行分离。结果:采用尿激酶为对照药物进行体外纤溶活性测定,得出以溶圈面积为纵坐标,以尿激酶活力(U)的对数为横坐标的回归方程为 Y=1.560 2 X-1.833 1(R^2=0.996 4),尿激酶活性在100~50 000 U范围内线性良好;同时建立多肽测定方法,回归方程为Y=2.028 3 X+0.008 6(R^2=0.999 1),肽在0~0.2 mg/ml范围内线性良好。并通过多种方法地龙酶解液进行分离,最后HPLC分离得到5个组分,活性大小为F 3>F 2>F 1>F 5>F 4。结论:采用多种分离方法对地龙酶解液进行分离,方法可靠。 展开更多
关键词 分离 半制备 地龙 活性测定
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基于巯基-炔基点击化学的苯硼酸功能化材料的制备及其在糖蛋白/糖肽选择性富集中的应用研究 预览 被引量:1
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作者 张丽媛 王立恒 +3 位作者 王丽莉 董佩佩 刘和真 赵艳艳 《分析化学》 SCIE EI CAS CSCD 北大核心 2019年第1期155-162,共8页
硼亲和色谱法在糖肽/糖蛋白选择性富集中的应用趋于成熟。硼酸亲和材料的选择性、生物相容性、制备过程是否简便均是开发新型苯硼酸功能化材料需要考虑的问题。本研究针对硼酸亲和材料开发的关键问题,设计并制备了一种新型苯硼酸功能化... 硼亲和色谱法在糖肽/糖蛋白选择性富集中的应用趋于成熟。硼酸亲和材料的选择性、生物相容性、制备过程是否简便均是开发新型苯硼酸功能化材料需要考虑的问题。本研究针对硼酸亲和材料开发的关键问题,设计并制备了一种新型苯硼酸功能化材料(TYBA材料)。此材料采用基于巯基-炔基的无铜催化点击化学方法进行合成,生物相容性好,制备方法简便。红外光谱表征结果证明材料合成成功。采用基质辅助激光解吸离子化-飞行时间质谱(MALDI-TOF-MS)测试TYBA材料的糖肽富集选择性,结果表明,TYBA材料能够分别从辣根过氧化物酶(HRP)和免疫球蛋白G(IgG)酶解液中鉴定出11个和8个糖肽;以HRP-牛血清白蛋白(BSA)酶解液(1∶10,n/n)混合物作为研究对象,富集后能够鉴定出8个糖肽信号。采用SDS-PAGE凝胶电泳考察TYBA材料的糖蛋白富集选择性,以HRP、IgG、核糖核酸酶B(RNaseB)作为考察对象,结果表明,TYBA材料对不同类型糖蛋白具有较好的富集选择性。以实际人血清样品为测试对象验证TYBA材料在实际生物样品中的应用价值。结果表明,富集后非糖蛋白得到较大程度去除,糖蛋白得以富集。所制备的材料和方法具有大规模分离处理实际蛋白质样品的应用前景。 展开更多
关键词 硼亲和色谱 糖肽 糖蛋白 分离 富集
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渗透与分离:北朝女性群体造像记探微 预览
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作者 李林昊 《中原文化研究》 2019年第3期120-128,共9页
北朝时期佛教的风靡打破了阶层的界限,深深地渗透到民众的生活之中。从出土的造像记来看,女性作为重要群体积极参与到造像活动之中,贵族女性、平民女性和比丘尼的身影皆有显现。但由于政治地位、经济基础、文化素养等的差异,佛教信仰又... 北朝时期佛教的风靡打破了阶层的界限,深深地渗透到民众的生活之中。从出土的造像记来看,女性作为重要群体积极参与到造像活动之中,贵族女性、平民女性和比丘尼的身影皆有显现。但由于政治地位、经济基础、文化素养等的差异,佛教信仰又在不同的阶层和群体中出现分离,具有了一定的阶层性特征。造像记作为僧尼、信众表达其信仰、心愿的重要载体形式,因所处阶层的差异,使得不同女性群体的造像记呈现出各自的独特性。比丘尼因僧侣的特殊身份,其造像的基本建构模式与俗家信众迥异,产生了特有的文本形态。平民女性和贵族女性在造像活动中的组织结构、造像题材、发愿套语等极为相似,却因所在阶层的影响,形成了各自不同的造像类型、文体特征和祈愿内容,具有"同构异质性"特征。 展开更多
关键词 女性群体 合作造像 渗透分离 同构异质
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动物源活性蛋白多肽的分离纯化方法研究进展 预览
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作者 付文鹏 杨永寿 肖培云 《天然产物研究与开发》 CAS CSCD 北大核心 2019年第5期916-921,共6页
动物类中药的有效成分以蛋白多肽为主,因此活性蛋白多肽具有重要的医疗保健价值。文章分析了沉淀法、色谱法、膜分离法以及电泳法的基本原理和主要适用范围,综述了这些方法在动物源活性蛋白多肽的分离纯化中的应用,为动物源蛋白多肽的... 动物类中药的有效成分以蛋白多肽为主,因此活性蛋白多肽具有重要的医疗保健价值。文章分析了沉淀法、色谱法、膜分离法以及电泳法的基本原理和主要适用范围,综述了这些方法在动物源活性蛋白多肽的分离纯化中的应用,为动物源蛋白多肽的分离纯化与进一步研究提供参考,以期开发出高效、经济和环保的蛋白多肽分离纯化新技术。 展开更多
关键词 蛋白质 多肽 分离 纯化 研究进展
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Progress in the Application of X Zeolite in Adsorption 预览
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作者 Wang Yubing Wang Huiguo 《中国炼油与石油化工:英文版》 SCIE CAS 2019年第1期1-6,共6页
The application of X zeolite in the areas for producing para-xylene by adsorptive separation, N2/O2 separation,etc., was reviewed, and the framework SiO2/Al2 O3 molar ratio, the cations and the water content of X zeol... The application of X zeolite in the areas for producing para-xylene by adsorptive separation, N2/O2 separation,etc., was reviewed, and the framework SiO2/Al2 O3 molar ratio, the cations and the water content of X zeolite significantly affected its selectivity and capacity. As the active component of para-xylene adsorbent, the X zeolite with a framework SiO2/Al2 O3 molar ratio of 2.2-2.4 coupled with cations of Ba^2+ and K^+, as well as a water content of 4.0%-5.0% exhibited higher para-xylene selectivity. For N2/O2 separation, higher N2 capacity and N2/O2 separation factor were achieved when the X zeolite had a framework SiO2/Al2 O3 molar ratio of 2.0 coupled with Li^+ cations. The introduction of another cation in X zeolite could further increase the N2/O2 separation factor, while the adsorption of water, however, could lead to a remarkable decrease of N2 capacity. Besides, the X zeolite could be used in adsorptive separation of highly pure He and selective adsorption of CO2, CO, CH4, N2, Ar,and H2. 展开更多
关键词 FAU PARA-XYLENE air SEPARATION SELECTIVITY
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CO2分离方法的研究进展 预览
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作者 王芃 胡云峰 《化工科技》 CAS 2019年第2期62-65,共4页
CO2作为温室效应的主要气体,近些年来一直备受关注。综述了CO2脱除的方法,主要有吸收法(主要包括物理吸收法、化学吸收法和混合溶剂吸收法)、膜分离法、低温蒸馏法和变压吸附分离法;详细介绍了变压吸附分离法,因其能耗低、易操作、污染... CO2作为温室效应的主要气体,近些年来一直备受关注。综述了CO2脱除的方法,主要有吸收法(主要包括物理吸收法、化学吸收法和混合溶剂吸收法)、膜分离法、低温蒸馏法和变压吸附分离法;详细介绍了变压吸附分离法,因其能耗低、易操作、污染小等优点,在CO2分离过程中发挥着越来越重要的作用,并对未来CO2的吸附分离进行了展望。 展开更多
关键词 CO2 分离 变压吸附
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高滑石型难选钼矿选矿进展 预览
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作者 孙大勇 祁忠旭 +2 位作者 肖舜元 冯程 王龙 《现代矿业》 CAS 2019年第3期114-117,共4页
高滑石型钼矿原矿钼品位高,开发价值大,但选矿难度也大。针对高滑石型难选钼矿高效选矿的难题,介绍了高滑石型钼矿的特点,从工艺、药剂和设备等角度阐述了高滑石型钼矿的选矿进展并进行了分析。对于钼与滑石分离的难题,建议从高效抑制... 高滑石型钼矿原矿钼品位高,开发价值大,但选矿难度也大。针对高滑石型难选钼矿高效选矿的难题,介绍了高滑石型钼矿的特点,从工艺、药剂和设备等角度阐述了高滑石型钼矿的选矿进展并进行了分析。对于钼与滑石分离的难题,建议从高效抑制剂角度和选矿流程两个方面进行攻关,实现该类资源的高效开发利用。 展开更多
关键词 滑石 钼矿 分离 抑制剂 流程
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