共查询到20条相似文献,搜索用时 31 毫秒
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研究了环己烷工业生产环己酮中,无催化氧化低温分解工艺中碱度、反应时间、反应温度、Co源浓度等条件对环己基过氧化氢分解转化率和总收率的影响.结果表明,在碱度为1.0 mol/L、反应时间为1.4h、反应温度为95~105℃、Co源含量1.0~1.2 μg/g条件下,该反应的转化率和总收率可以达到最优,分别为95.4%和8... 相似文献
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三相循环床中树脂催化过氧化氢异丙苯分解 Ⅰ.工艺条件研究 总被引:4,自引:0,他引:4
针对树脂催化过氧化氢异丙苯分解反应的特点 ,设计了新型气、液、固三相循环流化床反应器。该反应器接近全混流反应器 ,解决了工程放大存在的树脂破碎与传质和传热的矛盾。适宜的反应温度为 70~ 80℃ ,此时进料 (过氧化氢异丙苯 ) /(丙酮 )约为 1∶3 ,产物的选择性不低于硫酸催化工艺。进料过氧化氢异丙苯空速为 3 0h- 1 时 ,产品中过氧化氢异丙苯的质量分数 <0 .1%。催化剂的失活是其吸附原料中的Na+ 所致 ,催化剂的寿命与原料中的Na+ 含量成反比。当Na+ 质量分数为 2× 10 - 6 时 ,催化剂的寿命可达 160 0 0倍。 相似文献
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Keggin结构铬单取代硅钨杂多酸钾催化过氧化氢分解 总被引:2,自引:0,他引:2
研究了在水溶液中Keggin结构铬单取代硅钨杂多酸钾催化过氧化氢分解的动力学行为,发现反温度是过氧化氢分解反应的主要影响因素,分解反应动力学方程为U=kCH2O2Ccat^1.3,活化能ΔJ=76.8kJ/mol。 相似文献
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本文叙述了树脂分解过氧化氢异丙苯(CHP)制苯酚、丙酮的各项主要条件的选择以及反应器型式和工艺流程。由工业装置的生产实践证明:树脂分解已初步完成工业化过程,并取得了较好结果。 相似文献
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在淤浆反应器中,研究了Pd/C催化剂催化环己基过氧化氢加氢分解反应的本征动力学,利用经验方程对动力学试验数据进行了拟合,建立了幂函数型本征动力学模型。对模型进行了多种统计学检验,比较了分解动力学模型的计算值和试验值,获得相对误差绝对值的平均值为5.66%。该动力学模型有助于反应器的选型、设计和操作。 相似文献
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减二线馏分油是生产润滑油的主要原料,但其中的环烷酸在炼油厂的加工过程中会产生严重的腐蚀问题。采用机械滚球法制备镁铝水滑石催化剂,将其用于中海减二线馏分油催化分解脱酸反应,考察反应条件对催化剂脱酸性能的影响。研究结果表明,镁铝水滑石是一种有效催化分解脱除减二线馏分油中环烷酸的催化剂,通过机械滚球技术制备的镁铝水滑石催化剂具有强度大、孔结构较好等特点,在反应温度为320 ℃、反应时间为60 min、催化剂与原料油质量比为20%、反应压力为0.1 MPa的工艺条件下,中海减二线馏分油的酸值从4.32 mgKOH/g降到0.46 mgKOH/g,能够满足炼油厂在不进行材质升级条件下加工减二线馏分油的需要。 相似文献
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ABSTRACT The effect of ion exchange of mordenite on the catalytic behavior of the alkane hydroisomerization reaction over platinum loaded H-form modenite catalysts (Pt/HM) was investigated. The degree of sodium removal and changes in the SiO2/Al2O3 ratio were examined separately. The correlation between acidic properties and activities is presented. It has been proved in this study that chlorofluorocarbon treatment of Pt/HM samples was effective for enhancing the catalytic activity of alkane isomerization reactions. Optimum treatment conditions are given to obtain higher level of isoparaffin yields. 相似文献
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The effect of ion exchange of mordenite on the catalytic behavior of the alkane hydroisomerization reaction over platinum loaded H-form modenite catalysts (Pt/HM) was investigated. The degree of sodium removal and changes in the SiO2/Al2O3 ratio were examined separately. The correlation between acidic properties and activities is presented. It has been proved in this study that chlorofluorocarbon treatment of Pt/HM samples was effective for enhancing the catalytic activity of alkane isomerization reactions. Optimum treatment conditions are given to obtain higher level of isoparaffin yields. 相似文献
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用单柱离子色谱法测定油田水质 总被引:1,自引:0,他引:1
提出了一种用单柱离子色谱法测定油田水中无机离子的新方法.在阴离子键合柱上,用0.5mM苯甲酸钠和0.1mM柠檬酸钠作为洗脱液,可对油田水中的Cl-、NO3-、SO42-进行测定;在阳离子键合柱上,用1.5mM硝酸为洗脱液,可对油田水中的Na+和K+进行测定;用浓度各为1.5mM的草酸和乙二胺为洗脱液,可对水样中的Mg2+、Ca2+、Sr2+、Ba2+进行测定.对于油田水中含量大大高于其它无机离子的Cl-和Na+的测定,可在适当稀释后,再进行测定.本方法具有简便、快速、准确的优点,其测定结果与油田现行使用的方法所测结果基本相符. 相似文献
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ABSTRACT Eight asphalts selected for intensive study in the Strategic Highway Research Program have been separated into neutral, basic, and acidic fractions by means of ion exchange chromatography. Each asphalt exhibits a characteristic fractionation pattern into neutral, acidic, and basic components. The separations into chemical types were verified by elemental analysis and infrared methods. Separations were reasonably repeatable, and recoveries were acceptable. Large enough amounts of asphalts could be separated so that properties of interest of the fractions could be studied. In all cases, neutral fractions comprised at leaBt one-half of the asphalts. These neutral fractions are the least aromatic and contain the lowest percentages of heteroatoms and metals compared with the polar fractions. They also are much lower in molecular weight. The viscosities of the neutral fractions are at least two orders of magnitude lower than parent asphalt viscosities measured at the same temperature and rate of shear. The neutral fractions have properties predicted by a model of asphalt structure, which postulates that polar, aromatic materials are dispersed in a less aromatic, nonpolar solvent phase The polar fractions are friable solids or tacky semisolids. Them polar fractions also have properties predicted for dispersed phases in the above mentioned model of asphalt structure. They are more aromatic, contain larger percentages of heteroatoms, and are of higher molecular weight than neutral fractions. The polar fraction designated as the strong acid fraction is the most abundant an d most aromatic of the ion exchange chromatography polar fractions. and it also contains the largest concentration of polar functional groups 相似文献
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萨中地区复合离子调剖剂深度调剖效果 总被引:13,自引:9,他引:4
在研究萨中地区聚合物驱油低效井地质特征和动态反映特点的基础上,总结了一套调剖井选井原则和选井选层方法,通过对不同注聚合物阶段调剖效果的分析和评价。提出了今后聚合物驱调剖时机的选择方法和需要进一步研究的问题,为该荐技术的逐步完善提供了实践依据。 相似文献
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在油层内水驱过程、化学驱过程(包括表面活性剂、碱、聚合物及其混合物驱替)中,由于液体与团体的接触(随着波及面积的扩大,它们问的接触面积将不断增大),固-液间将进行离子交换,其中Na+/Ca2+间的交换将严重影响驱替过程。本文从理论上建立了流动过程中的Na+/Ca2+交换模型,并进行了物理模拟实验验证,该模型与实验吻合很好。 相似文献
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无定形体的离子探针研究 总被引:5,自引:0,他引:5
作者首次应用离子探针对干酪根中菌解无定形体和镜质无定形体进行了研究,认为 CH/C 和CH3/C 可以作为衡量无定形体产烃能力的参考指标。 相似文献