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2-巯基乙醇是一种重要的化工原料,本文综述了当前世界上2-巯基乙醇的主要生产方法及工艺;详细总结了2-巯基乙醇在不同领域上的广泛应用. 相似文献
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BASF公司德国Ludwigshafen工厂2-巯基乙醇生产能力2006年8月底提高40%.达到1万池.以满足全球市场需求.2-巯基乙醇主要用于制造PVC、 相似文献
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2-甲基-2-乙酸乙酯基-1,3-氧硫杂环戊烷的合成 总被引:3,自引:2,他引:1
以活性炭固载硅钨酸作为催化剂,用乙酰乙酸乙酯与巯基乙醇缩和合成了具有浓郁苹果香气的香料化合物2-甲基-2-乙酸乙酯基-1,3-氧硫杂环戊烷(Ⅰ)。采用正交试验研究了影响目标化合物Ⅰ产率的主要因素,得到了优化反应条件:n(乙酰乙酸乙酯):n(巯基乙醇)为1.1:1.0,催化剂固载量w(H4SiW12O40)=20%,m(催化剂):m(巯基乙醇)为0.05:1,苯作带水剂,回流反应2h,目标化合物Ⅰ产率达90.5%。该催化剂重复使用10次仍具有较好的催化活性。 相似文献
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2-巯基乙醇是一种重要的中间体,可用于农药、医药等的合成,国内有广阔市场、但生产能力不足。本文介绍了2-巯基乙醇的合成、生产及应用。建议国内新建装置靠近有废硫化氢气体回收的地方,并加快新型多效催化剂和溶剂的选择及规模化装置的建设。 相似文献
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采用浸渍法将α-八-(异戊氧基)酞菁铜分别负载在SBA-15和MCM-41介孔分子筛上,制备了CuPc/SBA-15和CuPc/MCM-412种复合催化剂。通过紫外-可见吸收光谱、红外光谱和N2吸附方法对催化剂的结构和组成进行了表征。测试了2种催化剂对巯基乙醇的催化氧化性能,并考察了温度对催化氧化活性的影响。实验结果表明,在pH=11时,CuPc/SBA-15催化氧化巯基乙醇的转化率高于CuPc/MCM-41;随着温度的升高,CuPc/SBA-15对巯基乙醇的转化率逐渐增大,并计算了CuPc/SBA-15催化反应在25℃时的活化能Ea为30.50kJ/mol。 相似文献
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超临界状态下的CO2在含有有机溶剂的水溶液中可作为萃取剂。这种情况可用于水和有机酸的分离,也可以用于从水溶液中萃取产品。要设计这样的过程,CO2-H2O-有机酸系统相平衡的数据是必不可少的。为此,在实验室建立了一套高压相平衡装置。为了验证这套装置的可靠性,测定了CO2-H2O-HAc体系在313K以及压力在15、20、25和30MPa下的相平衡数据,用Peng-Robinson方程^[1,2]进行了计算,并与文献值进行了比较。 相似文献
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在低温条件下测定了N_2C_2H_6CO_2系统的汽液平衡。所测数据的温度范围为220.00~253.15K,压力范围为2.00~5.00MPa。实验数据以常用的几个状态方程RKS、PR以及LKP来检验,结果令人满意,实验结果并被用来对以上3个状态方程中二元相互作用系数进行了优选。对于全部105个测量点的汽相组成,实验值和计算值之差的算术平均值分别为0.0064(N_2),0.0039(C_2H_6),0.0050(CO_2),压力实验值和计算值的算术平均相对误差为1.7%。 相似文献
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CO2驱油技术是利用CO2采出被束缚在地层中的剩余油,提高采收率,同时实现CO2掩埋。由于CO2可降低原油的界面张力,CO2-原油系统的界面张力数据是CO2采油技术的重要基础数据。本研究采用悬滴法,选取原油系统中环烷烃和芳香烃典型代表,测定了40~120℃,0.27~14.70 MPa下,CO2-环戊烷/环己烷/环辛烷/ 甲苯/乙苯/乙基环己烷六个二元体系的界面张力。分析了压力、温度、碳原子数及烷烃分子结构对界面张力的影响。结果表明,界面张力与压力呈线性关系;较低压力下,界面张力随温度的升高而降低,在较高压力下则呈现相反趋势;CO2-形态结构相同组分的界面张力随着碳数的增加而增大;分子间作用力对界面张力存在一定的影响。通过分析多种因素的影响,总结现有的CO2-原油(正构烷烃、环烷烃、芳香烃)实验数据,提出关联方程,将表面张力关联为温度、压力、碳原子数和偏心因子的函数,相关系数(R2 )为0.958,均方根误差(RMSE)及平均相对偏差(AARD)分别为1.12和11.01%。 相似文献
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丙烷(R290)作为一种性能优异的自然制冷剂,其两相流动压降特性在换热器设计及制冷系统优化等方面起到重要作用,而且目前对于低质量流率以及低饱和压力条件下的压降分析相对较少,且仅有少数研究结合流型进行分析。因此,开展了R290在内径6 mm的水平光管内压降特性实验研究。在如下实验工况范围内,质量流率70~190 kg·m-2·s-1,热通量10.6~73.0 kW·m-2,饱和压力0.215~0.415 MPa,干度0~1,获取了压降实验数据,并进一步基于实验工况以及流型分析了加速压降、两相摩擦压降的变化趋势。对比了现有的摩擦压降关联式并基于Friedel模型,使用Rev/Rel 和液相Froude数Fr表征气液相相互作用,获取了一个新的基于流型的两相摩擦压降关联式。新模型可以很好地预测R290实验数据,预测结果的平均相对偏差(ARD)为-0.2%,平均绝对相对偏差(AARD)为5.2%,λ30%为97.9%。对比文献中的实验数据,10组数据预测结果的ARD为10.0%,AARD为19.3%,λ30%为80.3%,由此可见新模型具有一定的预测精度和适用性。 相似文献
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Alireza Jahangiri 《分离科学与技术》2019,54(6):1067-1078
In this study, new equilibrium solubility data for carbon dioxide in aqueous solutions of 2-amino-2-methyl-1-propanol and piperazine (PZ) are provided. The two famous Deshmukh–Mather and Kent Eisenberg thermodynamic models are utilized to predict the CO2 absorption. The experimental data show that the solubility of CO2 decreases as the temperature increases. Our data suggest that the addition of PZ has different effects on CO2 absorption under different partial pressure of the CO2 in the gas stream. For high partial pressure, the addition of PZ promotes the absorption performance. However, at low CO2 partial pressure, PZ addition results in less saturated CO2 loading. The Deshmukh–Mather model can provide an accurate prediction of the experimental data at high partial pressure of CO2 (i.e. AAD = 3.4%) whereas the modified Kent–Eisenberg model can capture the inverse effects of the PZ at low partial pressure and provides a relatively good approximation of experimental data at low partial pressure (i.e. AAD = 10%). 相似文献
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Several direct or indirect approaches have been proposed to measure diffusion coefficient of gases into liquids. The main complexity of indirect techniques such as pressure decay method is interpreting early pressure–time data which strongly affected by incubation period effect or convective instability. In the current approach, accurate apparatus and precise experimental setup including a high pressure and temperature PVT cell, a high precision Sanchez pump, heating and recording sub-system are implemented and a novel data analysis procedure is applied to modify pressure decay method. The effect of incubation period is reduced remarkably and diffusion coefficient of carbon dioxide in water in wide range of pressures and temperatures is determined and the effects of temperature, pressure and carbon dioxide phase alteration from gas to supercritical are investigated and the value of uncertainty is estimated.Furthermore, diffusion coefficient of CO_2 and methane in an oil sample from one of the Iranian southwest oil formations is determined precisely using the experimental approach while no incubation period is detected. The results showed that incubation period duration decreases with increasing diffusion coefficient. Additionally, when CO_2 state is gas, rate of increasing diffusion coefficient with pressure is decreased with temperature and when CO_2 state is supercritical, the rate of increasing diffusion coefficient with pressure is decreased significantly. 相似文献
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引 言羟乙基乙二胺 (H2 NCH2 CH2 NHCH2 CH2 OH ,简称AEEA)是有机碱类化合物 ,分子中同时含有活泼的氨基和羟基 ,属氨基醇的一个品种 ,是香波、润滑油、树脂等重要原料 ,特别在表面活性剂合成方面的应用越来越广 .它是由过量的乙二胺(H2 NCH2 CH2 NH2 ,简称EDA)和环氧乙烷 (EO)合成的 ,产品混合物中必须将EDA和AEEA彻底分离 .计算、设计AEEA精馏分离过程的有关热力学数据尤为重要 .本文将着重对AEEA的蒸气压及AEEA与EDA的相平衡数据 ,用改进的静态平衡釜进行测定、关联 .而相应的这… 相似文献
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Pressure-composition isotherms were obtained for the carbon dioxide+1-hexene system at 40, 60, 80, 100 and 120 ‡C and pressure
up to 120 bar and for carbon dioxide+2-ethyl-1-butene system at 40, 75 and 100 ‡C and pressure up to 115 bar. The accuracy
of the experimental apparatus was tested by comparing the measured phase equilibrium data of the carbon dioxide+ 1-hexene
system at 40 ‡C and 60 ‡C with those of Wagner and Wichterle [1987], and Jennings and Teja [1989]. The solubility of 1-hexene
and 2-ethyl-1-butene for the carbon dioxide + 1-hexene and carbon dioxide+2-ethyl-1-butene systems increases as the temperatures
increases at constant pressure. These two carbon dioxide-polar solute systems exhibit type-I phase behavior, which is characterized
by an uninterrupted critical mixture curve that has a maximum in pressure. The experimental data are modeled by using the
Peng-Robinson equation of state. A good fit of the data is obtained with Peng-Robinson equation of state using two adjustable
parameters for carbon dioxide+1-hexene and carbon dioxide+2-ethyl-1-butene systems. 相似文献