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BImCl/CuCl离子液体脱除MTBE中硫醇机制及性能研究 《燃料化学学报》2015,43(9):1113-1119
以N-丁基咪唑、HCl和CuCl为原料两步法合成了离子液体[BIm]Cl/CuCl,并用傅里叶变换红外光谱FT-IR和傅里叶变换离子回旋共振质谱FT-ICR MS对其结构进行表征。采用差热扫描量热仪DSC、FT-IR以及紫外可见光谱UV-vis对吸附硫醇的[BIm]Cl/CuCl进行分析,讨论了[BIm]Cl/CuCl吸附硫醇的作用机制。以[BIm]Cl/CuCl为吸附剂,采用吸附蒸馏工艺脱除MTBE中的硫化物,MTBE硫含量可降低至5 μg/g以下,吸附剂进行多次循环使用且脱硫效果无明显降低。 相似文献
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采用UV/H2O2技术对污染水体中的MTBE进行了氧化降解试验,考察了不同MTBE初始浓度,不同H2O2浓度,不同pH值,不同波长的紫外光对降解效果的影响,以及不同Cl^-、HCO3^-浓度的抑制作用.结果表明,在室温条件下,当紫外光波长为254nm,H2O2为15mmol/L,pH为3.0时对起始浓度为1mmol/L的MTBE具有较好的降解效果;反应60min,MTBE去除率可达97.6%.实验证明,UV/H2O2氧化技术是降解MTBE的一种有效方法. 相似文献
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《Fluid Phase Equilibria》1997,130(1-2):207-222
The excess molar volumes, VmE, have been calculated from measured density values over the whole composition range at the temperatures 298.15 K and 308.15 K and under atmospheric pressure for the 12 mixtures {hydrocarbon (heptane, 2,2,4-trimethylpentane, 1-heptene or toluene) + branched chain ether (methyl 1,1-dimethylethyl ether, ethyl 1,1-dimethylethyl ether or methyl 1,1-dimethylpropyl ether)}. The excess volumes of all the mixtures except (toluene + ether) are positive over the whole composition range. The experimental results have been correlated and compared with the results from Prigogine-Flory-Patterson (PFP) theory. 相似文献
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A. G. Okunev E. A. Paukshtis Y. I. Aristov 《Reaction Kinetics and Catalysis Letters》1998,65(1):161-167
The synthesis of MTBE from methanol and isobutene has been carried out over a ZSM-5 based catalyst, in two types of continuous
flow catalytic reactors, fixed-bed and fluidized-bed. We have studied the influence of the molar ratio methanol to isobutene,
the temperature and the weight hourly spatial velocity (WHSV) on the yield of MTBE. 相似文献
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《Journal of Coordination Chemistry》2012,65(10):1069-1087
The mono(pentamethylcyclopentadienyl) lanthanide complexes [(C5Me5)Yb(μ-I)(μ-η 5?: η 5-C5Me5)Yb(C5Me5)]n (1), {[(C5Me5)Sm]3(μ-Cl)4(μ 3-Cl)(μ 3-OH)(THF)}2 (2), {[(C5Me5)Sm]2 (μ-OH)(μ-Cl)4(μ 3-Cl)Mg(THF)2}2 (3), [(C5Me5)2Sm](μ-Cl)6(μ 3-Cl)2(μ 4-Cl)[(C5Me5)Sm]4 (4), {[(C5Me5)Nd]3(μ 3-Cl)4(μ 4-Cl)2(μ 3-O2CPh)2K2(η 6-C7H8)}2 (5), [(C5Me5)Nd(C8H8)]2(μ-dioxane) (6), [(C5Me5)Yb(MeOtBu)]2(μ-η 8?:?η 8-C8H8) (7), [(C5Me5)Dy(μ-I)2]3 (8), and [(C5Me5) Tm(MeCN)6]I2 (9), have been identified by X-ray crystallography. 1 is unusual in that it has a μ-η 5?:?η 5-C5Me5 ring that generates a local bent metallocene environment around ytterbium. Complexes 2–5 demonstrate the versatility of bridging chlorides in generating a variety of structures for mono(pentamethylcyclopentadienyl) lanthanide halides. Complex 6 shows how dioxane can generate a crystallographically-analyzable complex by bridging two mixed-ligand metallocene units that do not readily crystallize with THF. The structure of 7 shows how methyl tert-butyl ether (MTBE) ligates a lanthanide. Complex 8 is a trimeric cyclopentadienyl lanthanide halide unusual in that it has six bridging halides that roughly define a trigonal prism. Complex 9 constitutes an organometallic example of a lanthanide in which acetonitrile completely displaces iodide counterions. 相似文献
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用甲基叔丁基甲醚对苯酚叔丁基化的反应研究 总被引:1,自引:0,他引:1
目前我国生产对叔丁基苯酚的方法通常以酚类为原料,烯烃或醚类为烷基化试 剂,其中异丁烯是主要烷基化试剂,但异丁烯在储存、运输等方面存在着一定的弊 端.采用直接以甲基叔丁基甲醚为烷基化试剂,研究了苯酚与甲基叔丁基甲醚的烷 基化反应.并对各影响因素进行了讨论,其中催化剂用量和原料比对反应影响最大 ,温度次之,反应时间影响最小.实验中得出了制备反应的最佳条件;苯酚转化率 大于85%,对叔丁基苯酚产率为78%,得到较理想产率.并与以异丁烯为烷基化试 剂进行了比较,具有成本低、流程短、操作简便、安全等特点,应用前景非常好. 相似文献
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Comparison of equilibrium and nonequilibrium models of a CSTR with total condenser focused on the multiple steady states and
dynamic behaviour was carried out. The steady-state behaviour of the model system, MTBE synthesis from methanol and isobutene
in a reactive distillation column, was studied in terms of the input parameters, i. e. feed flow rate of methanol or butenes, reflux ratio, and mass of catalyst. The dynamic behaviour of the system during the
start-up was investigated and perturbations of manipulated variables were found to cause transitions between the parallel
steady states.
Presented at the 33rd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 22–26 May
2006. 相似文献