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综述了近20年来含氢硅油的研究成果,对全含氢硅油和部分含氢硅油的制备方法进行了分析及比较。展望了含氢硅油的发展方向。 相似文献
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本文利用含氢硅油中Si-H键在2150cm~(-1)处的吸收峰,建立了红外光谱法测定含氢硅油中含氢量的方法,用于工业含氢硅油、合成匀泡剂和亲水型有机硅织物整理剂等的含氢量的测定取得了满意的结果。 相似文献
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合成了几种不同分子结构的低含氢硅油作为加成型液体硅橡胶的交联剂,采用橡胶加工分析仪系统考察了含氢硅油的活性氢质量分数、分子结构中S—iH基的数量及分布对加成型液体硅橡胶硫化过程和最终产品性能的影响。结果表明,随含氢硅油中活性氢质量分数的提高,硅橡胶的硫化速率加快,模量和硬度增加,较佳活性氢质量分数为0.3%~0.5%;随含氢硅油分子中S—iH基数量的增加,硅橡胶的硫化速率先加快而后稍有减慢,模量和硬度先增加而后趋于稳定,较佳S—iH基数量为10个左右;活性氢封端的低含氢硅油具有相对高的反应活性。 相似文献
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含氢硅油固化剂的固化性能研究 总被引:1,自引:0,他引:1
研究了甲基含氢硅油和乙基舍氢硅油的不同用量、不同固化温度对乙烯基甲基苯基硅油固化性能的影响。研究发现,甲基含氢硅油作为固化剂使用时,活性高,但是条件控制不当时易导致固化不均匀,其使用性能没有乙基含氢硅油稳定. 相似文献
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在有机硅生产过程中,副产物一甲基二氯硅烷回收再利用方法大多数为与三甲基一氯硅烷经一定的比例混合后进行水解反应,水解后的酸性含氢硅油再经过沉降、中和、调聚,脱出低分子物、压滤等工序制备二甲基高含氢硅油。从调整原材料一甲基二氯硅烷与三甲基一氯硅烷的比例、水解过程中的反应温度、轻质纯碱及小苏打的投入比例、反应温度以及活性白土回收再利用等方面入手,介绍了有机硅行业中二甲基高含氢硅油制备过程中的节能降耗措施。在保障二甲基高含氢硅油产品质量的基础上,达到节能降耗的目的。 相似文献
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食盐水溶液离子膜电解所产生的氢气具有很高的纯度,一般在99.5%~99.9%,生产控制在99.9%。本工序的任务是电解送来的高温湿氢气。首先洗涤并冷却,将其中所夹带的碱雾洗涤除去,同时也使气体温度得到降低,从而除去其中所含的大部分饱和水蒸气,使氢气得到初步净化,然后经过加压送往下游各用户。氢气处理直接控制着电解槽氢气总管的压力稳定,并直接影响着电解槽安全运行,以及氢气下游用户的安全。 相似文献
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Supported metal catalysts find wide industrial application. Of the many reasons for their use, none is more important than the very high degree of dispersion of the metal which can be achieved with comparative ease. Much effort has been devoted in recent years to the physical characterization of such catalysts, but it has recently been recognized that the functions of the metal and of the support cannot be readily separated. It has, of course, long been known that the support plays a vital role in dual ._ function catalysts: the phenomenon of hydrogen spillover is a further symptom of the close interaction between metal and support. This article reviews its detection and utilization. 相似文献
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Supported metal catalysts find wide industrial application. Of the many reasons for their use, none is more important than the very high degree of dispersion of the metal which can be achieved with comparative ease. Much effort has been devoted in recent years to the physical characterization of such catalysts, but it has recently been recognized that the functions of the metal and of the support cannot be readily separated. It has, of course, long been known that the support plays a vital role in dual ._ function catalysts: the phenomenon of hydrogen spillover is a further symptom of the close interaction between metal and support. This article reviews its detection and utilization. 相似文献
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L. S. Kelly 《Journal of the American Oil Chemists' Society》1956,33(10):484-487
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Faisal A. Al-Odail Alexandros Anastasopoulos Brian E. Hayden 《Topics in Catalysis》2011,54(1-4):77-82
Thin film alloys of PdBi have been synthesised using a high throughput physical vapour deposition method to produce compositional gradients of PdBi alloys. XPS indicates that for the non-equilibrated thin films, the surface composition is the same as the bulk, and core level shifts reflect the inter-metallic interaction between the component metals. Hydrogen absorption is hindered in the PdBi alloys, and at a composition of 70 at.% bismuth, the ??Bi2Pd bulk alloy phase is identified in XRD. This phase exhibits a maximum in the hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR) electrocatalytic activity. The increased activity of the alloy can be understood in terms of the Pd d-band density of states, and a concomitant increase in the binding energy of hydrogen. There is a strong correlation between the HER and HOR activity as a function of composition across the complete range of alloys. The potential of using the ??Bi2Pd bulk inter-metallic phase at the anode of PEM fuel cells is briefly discussed. 相似文献
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从吸收原理出发,经实验室及现场试验找到了由2种化合物组成的用于脱除氯化氢气体中氟化氢的湿法脱氟剂,确定了湿法脱氟工艺流程.现场脱氟试验表明,在常温下经该脱氟剂一级湿法脱氟后制取的盐酸中氟的质量浓度可以降至15 mg/L以下,脱氟率大于99.9%;脱氟得到的氟化产物经过滤、洗涤、干燥后产品主要成分符合相关要求,说明所开发... 相似文献
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通过引进由北京华友欣达石化科技有限公司引进美国滨特尔公司技术研发生产的型号为FF04G02粗氢聚结器,成功地排除了因粗氢分液罐V106分水效果不好而给制氢装置工艺操作和设备运行带来的安全隐患,同时也为装置的长周期运行和全厂的生产平衡提供了可靠地保障。 相似文献