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朱峰 《中国石油和化工标准与质量》1992,(5)
<正> 硫酸生产用钒催化剂及其试验方法化工行业标准,已由化工部审批发布,1992年1月1日起正式实施。其标准编号和名称如下;HG 2086—91 S 101型硫酸生产用钒催化剂FIG 2087—91 S 101-2H 型硫酸生产用钒催化剂HG 2088—91 S 107、S108型硫酸生产用钒催化剂HG 2089—91 硫酸生产用钒催化剂试验方法 相似文献
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浅谈国内外钒催化剂的质量差异 总被引:2,自引:0,他引:2
从化学组分、强度、活性、物相结构、孔容积及孔径分布等方面,对国产S101-2H、S108-1H钒催化剂和进口LP120、LP110钒催化剂进行剖析、对比。结果表明,国产催化剂强度比进口催化剂低30%左右;国产催化剂测定活性与进口催化剂相近,但实际使用活性明显劣于进口催化剂;进口催化剂载体中存在方英石、硫酸铝钾相,而国产催化剂没有;进口催化剂孔径分布较宽,主要孔径分布在0.50~1.50μm,而国产催化剂孔径分布较窄,主要孔径分布在0.060~0.30μm,不利于反应气体在催化剂内部的扩散。鉴此,建议采用高温煅烧载体,降低其有机物含量;优化配方,填加无机粘结剂;改进成型设备等措施,提高催化剂的强度和活性。 相似文献
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《辽宁化工》2002,(4)
天津市天环精细化工研究所 2 0 0 1年研制成功的TH - 3B苯氧化制顺酐新型催化剂已用于国内 4家企业总计产能为2 .1万t a的顺酐生产装置上 ,创产值 5 0 0万元 ,实现利税 12 0万元。由于用国产催化剂替代了意大利进口催化剂。可使生产厂节约外汇 80万美元 ,取得较大的社会效益与经济效益。天环精细化工研究所是研究和生产顺酐催化剂的主要科研院所 ,催化剂累计生产 135t,在全国 14个企业的 2 0套装置上得到应用。该研究所对原有催化剂进行改进 ,在合理的钒钼比例基础上 ,添加了两种以上的助催化剂 ,载体仍使用环状绿碳化硅 ,以保持其阻… 相似文献
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一项国内首创 ,具有国际先进水平的科研新成果———辛烯醛高压液相加氢制辛醇催化剂 ,日前在中国石油吉林石化公司研究院开发成功 ,并正式通过专家鉴定验收。吉林石化公司研究院采用混浆法工艺 ,经用金属盐与硅胶混合球磨、干燥、粉碎、捏合碾压、柱塞挤出成型等工序制成的催化剂 ,具有独创性。经在吉化化肥厂丁辛醇装置上 2年的应用证明 ,可以完全取代进口催化剂。吉化化肥厂使用此催化剂可明显降低采购成本 ,仅以 1 999年为例 ,进口催化剂每吨价格为 30万元 ,而国产催化剂每吨价格仅为 8万元 ,全年共生产 47.4t催化剂 ,为工厂创效益 1 0… 相似文献
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江镇海 《中国石油和化工标准与质量》1993,(5)
<正> 根据化工部的要求和安排,“氧化锌脱硫剂”等12项化工行业标准审查会已在南京化学工业(集团)公司举行。与会代表以科学、认真的态度对 S107-1H、S109(S109-1,S109-2)型硫酸生产用钒催化剂、氧化锌脱疏剂及其试验方法、甲烷化催化剂及其试验方法标准、 相似文献
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《中国石油和化工标准与质量》1992,(2)
<正> 专业分类标准号标准名称标准属性实施日期采用国际先进标准程度及水平化工部(91) 化科字第507号文批准发布G75 HG 2086—91(代替 HG 1-1202-79) S 101型硫酸生产用钒催化剂强制性 1992-01-01 催化剂活性相当于国外同类产品,国际一般水平G 75 HG 2087—91 S 101—2 H 型硫酸生产用钒催化剂″″″G 75 HG 2088—91 S 107、S108型硫酸生产用钒催化剂″″″G 74 HG 2089—91 硫酸生产用钒催化剂试验方法″″″G 75 HG 2090—91 B113型一氧化碳中温变换催化剂″″与英国 ICI15-4催化剂相当,国际一般水平化工部(91)化科字第516号文批准发布G71 HG 2091—91(代替 HG 2-1381-80) 氯化石蜡-42 强制性 1992-01-01 参照西德 HULS 公司指标,国际先进水平 相似文献
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一项国内首创 ,具有国际先进水平的科研新成果———辛烯醛高压液相加氢制辛醇催化剂 ,日前在中油吉林石化分公司研究院开发成功 ,并正式通过专家鉴定验收。吉化研究院采用混浆法工艺 ,经用金属盐与硅胶混合球磨、干燥、粉碎、捏合碾压、柱塞挤出成型等工序制成的催化剂 ,具有独创性。经在吉化化肥厂丁辛醇装置上 2年的应用证明 ,可以完全取代进口催化剂。吉化化肥厂使用此催化剂可明显降低采购成本 ,仅以 1999年为例 ,进口催化剂每吨价格为 30万元 ,而国产催化剂每吨价格仅为 8万元 ,全年共生产 47 4t催化剂 ,为工厂创效益 10 0 0多万元。… 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile
Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, 13C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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G. R. Hamed 《The Journal of Adhesion》1983,16(1):31-39
A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength. 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method1 was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity. 相似文献