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正庚烷-芳烃在加水N-甲酰吗啉溶剂中的液-液平衡 总被引:5,自引:1,他引:4
用平衡釜测定了常压、333.15K下正庚烷-苯-(N-甲酰吗啉(NFM) 水)、正庚烷-甲苯-(NFM 水)和正庚烷-对二甲苯-(NFM 水)3个拟三元(四元)体系的液-液平衡数据,得到了拟三元液-液平衡体系的共轭相组成和分配曲线。实验数据用UNIQUAC和NRTL模型进行关联,分别获得了拟三元和四元体系的模型参数。用共轭相作图法和模型参数推算了各体系的褶点数据,一致性良好。通过比较和讨论表明,对相同的正庚烷-芳烃体系,333.15K加水NFM溶剂较无水NFM溶剂萃取更有利于芳烃的回收。 相似文献
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我们曾提出气液色谱中同系物的保留指数与热力学性质间存在热容规律(1),标准燃烧热规律(2),本文进一步用标准生成热关联同系物的保留指数。 相似文献
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滚柱烘箱是钻井注和完井液进行热滚分散试验,评价泥浆抑制笥的主要设备,文中针对第二代(GH-3型)滚柱烘箱存在的问题,作出4点改造:(1)用数显数控温度系统代替晶体控制系统,(2)用数显数控时间继电器代替LED石英电子钟,(3)用金属镶嵌自润滑轴承或填充氟塑料轴承代替石墨轴承,(4)为每个高温罐加装一个搅拌器,改进后的滚柱烘箱整机性能达到国外同机水平,成本仅为进口机的1/4。 相似文献
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采用作者设计的液液平衡釜,于常压下测定了甲基环己烷(1)-DMF(2)二元系(20.0~47.9℃)的互溶度数据,以及常压、20.O℃和35.O℃下甲基环己烷(1)-苯(2)-DMF(3)三元系和甲基环己烷(1)-苯(2)-DMF(3)-水(4)(DMF/H2O=4∶1,mass比)四元系的LLE数据。 相似文献
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测定了恒压(2.6666×105Pa)下异丁醇(1)-2-乙基己醇(2)二元体系汽液相平衡数据,采用最大似然法对二元数据进行了热力学一致性检验,并分别用Wilson、NRTL及UNIQUAC模型对活度系数进行了关联,结果都令人满意。 相似文献
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烷烃—芳烃—N—甲酰吗啉体系液—液平衡研究 总被引:6,自引:2,他引:4
用液-液平衡釜测定了常压和58.8℃下正庚烷-苯-N-甲酰吧啉(NFM),甲基环已烷-苯-NFM,正庚烷-甲苯-NFM和甲基环已烷-甲苯-NFM4组三元体系的液-液平衡数据,用NRTL和UNIQUAC模型进行了关联,求得了它们的褶点,并对NFM溶剂存在下烷烃相对于芳烃的选择性进行了比较。 相似文献
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介绍了赤天化脱硫分厂蒸汽系统节能改造方案:(1)倒置桶式疏水阀;(2)在熔硫后增设一闪蒸罐,将熔硫系统出来的汽水混合物(蒸汽和凝结水)全部送入闪蒸罐进行回收,用闪蒸罐出来的二次蒸汽进行循环槽溶液加温和供新锦公司蒸煮竹地板原料。同时将闪蒸罐内冷凝下来的凝结水和冬季循环槽加温后产生的凝结水一并回收利用。改造后取得了良的好效果。 相似文献
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用水热法制备了纳米TiO_2载体材料,通过浸渍法制备成Mo/TiO_2催化剂。用含10%H_2S的H_2进行干法硫化,得到硫化态催化剂。应用高分辨电子显微镜(HREM)表征了催化剂的微观结构。结果表明,MoS_2片晶与锐钛矿型TiO_2载体之间存在基面键合方式和一种侧面键合方式,该侧面键合方式为TiO_2(101)表面与(001)MoS_2基面之间呈66°角,应用晶体学共格倒易点阵(CRLP)模型理论解释了MoS_2/TiO_2之间界面的形成机理。 相似文献
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Tungsten film (W film) is deposited by using the ion beam assisted deposition (IBAD) on the 316L substrate surfacein this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTCis evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectronspectroscopy (XPS) to find out the tribological mechanisms between the W film and the two additional additives. The resultshows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reductionproperty, while the anti-wear property is mainly caused by the hard surface of W film. 相似文献
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MMA-EA-DM三元共聚胶乳的制备及共聚物表征 总被引:2,自引:1,他引:1
以 (NH4 ) 2 S2 O8 Na2 SO3为氧化还原引发体系 ,于 45~ 60℃ ,进行MMA -EA -DM三元乳液共聚合 ,比较两种聚合方法 ,得出采用无种子半连续乳液聚合法所得乳液稳定性好 ,其转化率为 99% ,共聚物的特性粘数为 412ml/g ,并对共聚物进行了IR、1 HNMR的研究 ,结果表明 :三元乳液共聚合时 ,基本上合成的是三元共聚物 ,其组成为n(DM ) /n(MMA) /n(EA) =0 75 /1/1,由于单体DM溶于水 ,有极少量的DM均聚物或富集DM的共聚物生成 ,其摩尔分数为 3 6%。 相似文献
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Oxalylhydrazinium nitrate (OHN) and dinitrate (OHDN) were synthesized by protonation of oxalyldihydrazide with nitric acid. The synthesis is extremely cost effective (~$40/kg at the lab scale) and can be carried out in large scales and very good yields. OHN and OHDN were intensively characterized by low-temperature X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and vibrational spectroscopy. These new organic nitrate salts could be used as powerful ingredients in energetic formulations due to their low sensitivities (measured by Bundesanstalt für Materialforschung und Pröfung methods). Their thermal stability was investigated by differential scanning calorimetry (DSC) measurements. Further thermal studies of OHN showed compatibility with TNT (2,4,6-trinitrotoluene), DNAN (2,4-dinitroanisole), and RDX (1,3,5-trinitro-1,3,5-triazinane). The theoretical detonation and propulsion parameters of OHN and OHDN were calculated with the EXPLO5.5 code and compared to well-known insensitive explosives. The aquatic toxicity of OHN was determined by the luminescent bacteria inhibition test, yielding a much lower toxicity than RDX. 相似文献
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《Egyptian Journal of Petroleum》2014,23(3):331-338
Different types of nano-organo bentonite (NOB) were prepared from the Egyptian Bentonite (EB). EB was characterized by energy dispersive X-ray EDX. It was purified from different impurities using a conventional method via the treatment with HCl and distilled water. The modification of the clay was carried out using different types of organo-modifiers namely; hexadecyl trimethyl ammonium bromide (HTAB), 3-aminopropyltriethoxysilane (Silane), octadecylamine (ODA), and dodecylamine (DDA). The cation exchange capacity (CEC) was measured for pristine bentonite after and before modification. The NB was characterized by FTIR, XRD, TEM, and TGA techniques. The obtained results indicated that variation of the interlayer space gallery was effected by the type of the penetrator used. 相似文献
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采用双螺杆熔融共混工艺制备得到了聚苯硫醚(PPS)/聚对苯二甲酸乙二醇-1,4-环己二甲醇酯(PETG)二元合金PPS/PETG,采用不同降温速率的DSC实验对PPS/PETG合金的非等温结晶动力学进行了研究。结果表明,加入PETG后可使PPS的结晶温度向高温方向移动。采用Avrami及莫志深方法对PPS/PETG合金的非等温结晶动力学参数进行了计算。结果表明PPS/PETG合金可以产生较为明显的二次结晶现象,Avrami指数偏低,其中莫志深方法比较适用PPS/PETG合金的非等温结晶动力学过程。 相似文献