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聚合氯化铝铁的制备及其应用 总被引:1,自引:0,他引:1
研究了一种制备聚合氯化铝铁的新工艺。该工艺以聚合氯化铝为碱化剂和Fe(Ⅲ)溶液复合共聚生成PAFC。考察原料配比、反应温度、熟化温度、熟化时间以及pH值对产品性能的影响,确定了最佳的反应条件。制备聚合氯化铝铁的最佳实验条件为:n(Fe3+)∶n(Al3+)=5∶5、pH=4.00、熟化温度为30℃、熟化时间为3 h。对产品进行了水处理实验,考察产品对废水COD和浊度的去除效果,结果表明,COD的去除率与浊度的去除率都很高。 相似文献
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研究了一种制备聚合氯化铝的新工艺。该工艺为以硫酸铝、氯化钙和氢氧化钙为原料制备聚合氯化铝;考察了原料配比、反应温度、熟化温度、熟化时间以及pH值对产品性能的影响,确定了最佳的反应条件。制备聚合氯化铝的最佳实验条件为:n(Al2(SO4)3·18H2O)∶n(CaCl2)∶n(Ca(OH)2)1.00∶2.75∶1.20,加入CaCl2时的温度为95℃,加入CaCl2时间为20 min,加入Ca(OH)2的温度为50℃,加入Ca(OH)2时间为20 min,熟化反应温度为60℃,熟化时间为4 h。对产品进行了水处理实验,考察产品对废水COD和浊度的去除效果,结果表明,COD的去除率与浊度的去除率都很高。 相似文献
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以铝灰为原料,用一步酸溶法制备了高效聚合氯化铝。对铝灰、HCl、水三者配比以及反应温度、反应时间、熟化温度、熟化时间、搅拌速度等参数对聚合氯化铝的性能影响进行了实验研究,确定了制备聚合氯化铝的最佳工艺条件。产品的各项指标达到了相关国家标准,对工业化生产具有一定的指导意义。外加磁场后,沉降速度明显提高。 相似文献
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聚合氯化铝是目前国内外广泛使用的高效混凝剂,具有用量少、污泥少、除浊高、对出水pH影响小等优点。以铝灰、盐酸为主要原料,采用酸溶一步法制备了高效聚合氯化铝絮凝剂。对铝灰、盐酸、水三者的配比进行了实验研究,并分析了反应温度、反应时间、熟化温度、熟化时间、搅拌速度等参数对聚合氯化铝的性能影响,确定了制备聚合氯化铝的较佳工艺条件。产品的各项指标达到了国家相关标准,对工业化生产具有一定的借鉴意义。尽管酸溶法普遍存在原料利用率低、酸雾浓重等缺点,但是其工艺简单、投资少,仍然是将来一种主要的生产方法;目前中国聚合氯化铝溶液的生产方法基本上都属于酸法,最主要的是提高聚合氯化铝品质,降低重金属含量,降低生产成本。 相似文献
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介绍了用高岭土制取聚合氯化铝的生产方法,探讨了摩尔比、碱化度、熟化时间、聚合时间等因素对产品质量的影响,选择了最佳工艺条件,制备出固态聚合氯化铝。 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