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测定SO4=的方法很多,一般都是不同方法适用于不同样品。我们将硝酸铅滴定法(l)和氯化钡滴定法(2)进行了修改,用以测定粗酸水洗水。原方法是测定有机硫,样品用“氧瓶燃烧”法处理。粗酸水洗水中主要是SO4=和水溶性酸,实验证明,水溶性酸对测 相似文献
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朱泽礼 《中国石油和化工标准与质量》2012,32(1):22-23
碳化钙(电石)与水发生水解反应后生成的杂质硫以两种形式存在:有机硫和无机硫,有机硫可运用气相色谱法测定其含量;无机硫主要以硫化氢形式存在于电石水解反应生成的乙炔气中和以硫化物形式存在于电石渣中,对无机硫可选择适当的方法对试样进行处理,控制反应条件,以Cd(CH3COO)2溶液作为反应产生的H2S气体的吸收剂,Cd(CH3COO)2吸收液经过一系列化学反应后,用Na2S2O3标准滴定溶液滴定处理后的Cd(CH3COO)2吸收液,根据Na2S2O3消耗的体积数,计算出试样中无机硫含量;无机硫和机硫相加,得出试样中总硫的含量。 相似文献
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测定了一炉(爱奇逊炉)焙烧品电极在一个石墨化周期内炉芯温度及SO2和H2S两种有害气体逸出状况,得出了石墨化过程中上述两种有害气体的逸出速率随炉芯温度变化关系。这两种有害气体追出速率最大的温度范围为1600~1800℃。每石墨化一吨焙烧品可放出SO2和H2S及相应总硫份的量分别为:6.14kg、222kg、516kg。炭制品在石墨化过程中硫份逸出状况的测定@苏香远$吉林炭素集团有限责任公司!吉林,132002石墨化炉;;炉芯温度;;SO_2;H_2S1瞿戌,徐仲榆.炭素技术,1991(1):6
2李圣华.炭和石墨制品(下册).北京:冶金工业出版社,1987,14~15… 相似文献
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曾杰 《中国石油和化工标准与质量》2018,(10)
文章应用红外碳硫分析仪,在选定的硅锰标样下建立了硅锰合金中测定硫量的方法。对硅锰合金试样分析条件、试样量、助熔剂的选择和配比进行了探讨,确定了最佳的分析条件,且进行了准确度和精密度实验,取得了满意结果,操作简单,方便公司日常工作。 相似文献
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为评价活性焦脱硫特性,选取现有活性焦,在微分反应装置上考察烟气组分对吸附硫容的影响及SO2浓度对吸附量、吸附速度的影响。试验结果表明:烟气组分中SO2、氧、水蒸汽体积分数增加有利于提高活性焦吸附硫容,而随床层温度的升高,活性焦吸附硫容降低。活性焦吸附符合Bangham吸附速率模型,采用较高SO2体积分数的模拟试验气体,吸附速度衰减很快,将商用大颗粒活性焦破碎至2~3 mm,在SO2为10000×10-6的模拟试验气体工况的条件下吸附,吸附4 h后,其吸附硫容增量小于5%,可将其4 h吸附SO2量作为活性焦的吸附硫容。 相似文献
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焚硫炉中预转化产生的SO3干扰了碘液法测定转化器进口SO2浓度的准确性。基于硫磺制酸装置的尾气氧浓度、焚硫炉温升以及转化总温升与初始SO2浓度之间存在关联,列出对应的数据,描绘出关系图并归纳出计算式。举例并讨论了4种确定转化器进口SO2浓度方法的具体应用。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献