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介绍了CS喷嘴在120×10^4t/a催化裂化装置的应用情况。工业试验结果表明,在原料油性质、催化剂性质和操作条件基本相同的情况下,使用CS喷嘴后,改善了产品分布,降低装置运行费用。干气收率降低了1.5个百分点;焦炭收率降低了1.2个百分点;液化气产率提高了1.3个百分点;汽油产率提高了1.1个百分点;柴油产率提高了0.3个百分点。CS喷嘴对产物性质无不良影响。年增加综合经济效益6 126万元。 相似文献
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甲氧胺盐酸盐的含量测定方法 总被引:2,自引:0,他引:2
提出了以酚酞为指示剂,氢氧化钠为滴定剂测定甲氧胺盐酸盐含量的方法。测定了甲氧胺盐酸盐的离解常数Ka,考察了干扰因素对测定的影响。结果表明,干扰物质NH4Cl在样品中的含量小于5%不影响测定。该方法具有简便、快速,准确等特点,测定了数批样品结果较满意。 相似文献
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PU/EP共混物中的化学反应及粘接性能的研究 总被引:7,自引:1,他引:6
合成聚氨酯(PU)预聚体同环氧树脂(EP)共混,加入扩链剂、交联剂,制得PU/EP复合材料,用红外光谱分析研究了共混体系中的化学反应,考察了两聚合物组成对聚合物网络间互穿程度的影响,研究了共混物的粘接性能。 相似文献
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系统研究了增韧剂、填料和成核剂对炭黑着色聚丙烯(PP)黑度的影响.结果表明,随着增韧剂含量增加,L值增大,黑度变差,添加增韧剂对配高黑度颜色不利,增韧剂对黑度的影响与注射过程中产生的皮芯结构有关;填料对黑度的影响不大,但用量过多会降低表面光泽度;成核剂的加入提高了结晶温度,注射过程中表层熔体更易硬化,抑制了炭黑向芯层迁移,表层炭黑含量比纯PP高,吸收光线能力增强,L值变小,黑度增加. 相似文献
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Flow behaviors of four kinds of granular particles (i.e. sphere, ellipsoid, hexahedron and binary mixture of sphere and hexahedron) in rectangular hoppers were experimentally studied. The effects of granular shape and hopper structure on flow pattern, discharge fraction, mean particle residence time and tracer concentration distribution were tested based on the visual observation and particle tracer technique. The results show that particle shape affects significantly the flow pattern. The flow patterns of sphere, ellipsoid and binary mixture are all parabolic shape, and the flow pattern shows no significant difference with the change of wedge angle. The flowing zone becomes more sharp-angled with the increasing outlet size. The flow pattern of hexahedron is featured with straight lines. The discharge rates are in increasing order from hexahedron, sphere, binary mixture to ellipsoid. The discharge rate also increases with the wedge angle and outlet size. The mean particle residence time becomes shorter when the outlet size increases. The difference of mean particle residence time between the maximum and minimum values decreases as the wedge angle increases. The residence time of hexahedron is the shortest. The tracer concentration distribution of hexahedron at any height is more uniform than that of binary mixture. The tracer concentration of sphere in the middle is lower than that near the wall, and the contrary tendency is found for ellipsoid particles. 相似文献
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纳米金属催化剂的制备方法包括化学法和物理法。化学法中主要有溶胶-凝胶法、沉淀法、溶剂热合成法、微乳法和水解法等;物理法主要有气相凝聚法、溅射法和机械研磨法等。其中化学法中的溶胶-凝胶法及沉淀法应用最广。对纳米金属催化剂的制备方法进行了比较,并简要论述了制备及应用过程中存在的主要问题。 相似文献
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用UV/TiO2法对炼油含碱废水进行预处理实验,TiO2以悬浮态存在于废水中,对油类有较高的去除率,且随着TiO2投加量的增加而升高。在本实验的条件下,在TiO2加入量为20g时,COD、酚类、NH3-N的平均去除率达到最高,分别为61%,58%,50%,此时,油的平均去除率为68%,但S2-的降解几乎不受TiO2影响,平均去除率在94%以上。实验表明,光催化氧化技术处理炼油含碱废水可达到预处理的目的,降解过程具有除臭、除色,快速高效,不产生污泥等优势。 相似文献
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本文用扫描电镜对CSM膜进行结构表征,照片显示出膜表面均匀平整,膜与支撑层结合紧密,增强了膜的强度和稳定性。利用CSM膜对C6H6/空气体系进行富集。考察了原料气浓度、原料气流量、渗透侧压力和操作温度对富集效果的影响。实验结果表明:随着原料气中苯浓度的增加,富集率先增大后减小;随着原料气流量的增加,富集率明显降低;随着真空度的增大,富集率明显增大;温度对富集率的影响不大。当原料气操作温度为293.2K、苯的浓度为40×10-6、渗透侧压力0.067MPa、流量为150L.h-1时,CSM膜对低浓度苯的富集效率可达25%。 相似文献
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The feasibility of chromium(VI) to induce graft polymerization of methyl methacrylate onto silk was investigated. The rate of grafting was determined by varying monomer concentration, chromium(VI) concentration, temperature, acidity of the medium, nature of the silk, reaction medium, and redox system. The graft yield increased with increasing monomer concentration up to 0.65M, and with further increase of monomer the graft yield decreased. The graft yield increased with increasing chromium(VI) concentration. The grafting is considerably influenced by chemical modification of silk prior to grafting. The graft yield is influenced by thiourea concentration, decreasing with increasing thiourea concentration. The effect of certain inorganic salts and anionic surfactants on the rate of grafting was investigated. 相似文献
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采用动态法分别测定了丁香油中主要成分丁香酚、乙酰丁香酚和β-石竹烯在超临界CO2中的溶解度。实验结果表明:三种成分在超临界CO2中的溶解度随着压力的增加而增大,随温度的增加而变小。在压力10-30MPa和温度313.15-333.15K范围内,丁香酚在超临界CO2中的溶解度(摩尔分数)为0.0002 -0.0580,乙酰丁香酚在超临界CO2中的溶解度(摩尔分数)为0.00018-0.07030,β-石竹烯在超临界CO2中的溶解度(摩尔分数)为0.00034-0.07096。采用Chrastil方程及其改进方程(Adachi、del Valle)分别对三种化合物在超临界CO2中的溶解度数据进行了关联,对丁香酚关联的AARD值分别为4.92%、4.47%、5.19%,对乙酰丁香酚关联的AARD值分别为3.69%、2.91%、3.24%,对丁香酚关联的AARD值分别为4.77%、4.41%、4.21%。 相似文献
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The solid-state polymerization of N-vinylcarbazole initiated by UV-radiation at 25, 32.5, and 45°C was studied. The rate of polymerization increased with increase in temperature. The limiting conversion at all temperatures is 56%. The molecular weight, determined by viscosity measurements, first increased, reached a maximum, then decreased. The molecular weight distribution, studied by GPC, was broad with a shoulder on the low molecular weight side. The morphology of partially polymerized single crystals was studied by electron scanning microscopy to determine the propagation mode of polymerization with respect to the monomer structure. The high activation energy of 71-9kJ/mol and ESR spectrum suggest a radical mechanism of polymerization. 相似文献
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长庆靖边气田三甘醇污染分析及回收工艺探讨 总被引:1,自引:0,他引:1
本文探讨了靖边气田三甘醇消耗现状,分析污染物的来源及主要组成。用模拟实验确定影响三甘醇脱水效率的主要污染物,根据实验结果设计回收利用污染TEG溶液配套工艺。结果表明:靖边气田三甘醇消耗严重,其主要污染物来自各个生产环节带来的水、无机盐、三甘醇降解产物、脱水时产生的高聚物等组成。其中水对三甘醇脱水效果最显著,其次是无机盐类,有机物杂质对三甘醇起泡有影响。设计回收工艺能够满足生产要求,具有较好的环保和经济效益,同时为气田循环利用废弃物提供新的途径,节约生产成本。 相似文献