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Cu-SBA-15分子筛的表征及其催化氧化水溶液中4-硝基苯酚的性能 总被引:1,自引:0,他引:1
采用两步水热晶化法合成了Cu-SBA- 15介孔分子筛,并且用XRD、N2吸附、FT-IR、TEM以及UV-vis对所合成的样品进行了表征.结果表明,Cu-SBA- 15具有高度有序的介孔结构和均一的孔径分布.部分铜离子进入了分子筛骨架,部分铜离子以八面体配位环境与骨架硅相连均匀分布在孔壁上.Cu-SBA-15(含铜6.0%)在催化氧化水溶液中4-硝基苯酚的反应中具有良好的催化活性,主要考察了H2O2初始浓度、催化剂用量、处理温度等因素对4-硝基苯酚氧化效果的影响.在4-硝基苯酚初始浓度为200 mg·L-1、H2O2初始浓度为1.2 g·L-1、在60℃的条件下处理100 min,4-硝基苯酚去除率达100%,TOC去除率可达82.4%. 相似文献
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文章介绍了大孔树脂吸附法处理对硝基苯酚废水技术的基本原理和应用实例。实际运行结果显示,利用大孔树脂处理对硝基苯酚废水具有吸附效果好、解析容易、性能稳定、可综合利用的优点,是目前处理对硝基苯酚废水的成熟和有效方法。 相似文献
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微电解-SBR组合处理对硝基苯酚研究 总被引:1,自引:0,他引:1
以微电解为预处理,与生化处理直接结合,考察了该工艺对对硝基苯酚的处理效果.结果表明,微生物经过合理的驯化后,在短期内获得对对硝基苯酚较好的适应性与处理效果,不同质量浓度负荷下微生物都能够将对硝基苯酚的质量浓度降低到1~2mg·L~(-1),只是随着负荷的提高,降解的时间也不断延长.组合工况在对硝基苯酚含量较高时,系统运行稳定,能够较好提高整体去除效率,出水对硝基苯酚的质量浓度在5mg·L~(-1)左右,COD不超过40mg·L~(-1),并具有一定的抗冲击负荷能力. 相似文献
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坡缕石-活性炭-壳聚糖负载环糊精对硝基苯酚的吸附性质 总被引:8,自引:1,他引:7
研究了坡缕石-活性炭-壳聚糖负载环糊精吸附剂对对硝基苯酚、邻硝基苯酚的吸附行为以及pH、温度等对吸附的影响。在pH=5.0-7.5时,自制吸附剂对对硝基苯酚,邻硝基苯酚具有较好的吸附作用。等温吸附曲线拟合结果显示,吸附剂对硝基苯酚的吸附更符合Langmu ir方程。热力学函数计算表明,吸附剂对硝基酚的吸附是自发的放热过程,对硝基苯酚的吸附热和熵变分别为-27.49 kJ/mol和-70.39 J/(mol.K),邻硝基苯酚的吸附热和熵变分别为-29.06 kJ/mol和-78.87 J/(mol.K),吸附自由能均随温度的升高而增加。 相似文献
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介绍了一硝油中硝基酚分析方法的改进内容及对测定结果的影响因素。改进后的方法具有较好的重复性和精确度。 相似文献
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改进Skraup法制备8-羟基喹啉的研究 总被引:1,自引:0,他引:1
采用改进的Skraup法,以丙烯醛代替甘油,以邻氨基苯酚、邻硝基苯酚、丙烯醛为原料在盐酸、醋酸存在的条件下合成了8-羟基喹啉.通过正交实验探讨了丙烯醛滴加时间、醋酸用量、丙烯醛用量、邻硝基苯酚用量、反应时间对产率的影响.确定最佳反应条件为:邻氨基苯酚用量为21.8 g(0.20 mol)、邻硝基苯酚用量为14.6 g(0.11 mol)、丙烯醛用量为20.2 g(0.36 mol)、醋酸用量为22.0 g(0.37 mol)、盐酸200 mL、丙烯醛滴加时间为3 h、加热反应时间为1.0 h.此时,8-羟基喹啉的产率达72%. 相似文献
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采用测量非彩色物体表面白度值的白度计对皂基色泽进行监督检测,确定了测量皂基的白度较佳表示方法R457白度,并用白度计法与现行的皂基检测方法比较测色计法进行对比,将白度计法应用于皂基的在线检测。从白度计光电效应测量原理分析,白度计满足测量皂基色泽的要求。用白度计法对通常用的3类皂基进行了测定,并用斯图登特数理统计法进行数据处理,制定了相应的标准。 相似文献
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M. E. S. Mirghani Y. B. Che Man S. Jinap B. S. Baharin J. Bakar 《Journal of the American Oil Chemists' Society》2002,79(2):111-116
A new analytical method was developed for the determination of soap in palm and groundnut oils by FTIR spectroscopy. Soap
from 0 to 80 mg/kg oil was produced in situ in the oils by adding sodium hydroxide. The FTIR spectroscopy was with a sodium chloride transmission cell, and the partial
least-squares statistical method was used to calibrate a model for each oil. The accuracy of the method was comparable to
that of AOCS Method Cc17-95, with coefficients of determination (R
2) of 0.98 and 0.98 for both palm and groundnut oils. The standard errors of calibration were 1.84 and 1.36 for the two oils,
respectively. The calibration models were cross-validated, and the R
2 of cross-validation and standard errors of cross validation were computed. The standard deviation of the difference for repeatability
of the FTIR method was better than that for the chemical method used for determining soap in palm and groundnut oils. With
its speed and ease of data manipulation by computer software, FTIR spectroscopy is a possible alternative to the standard
wet chemical methods for rapid (2 min) and accurate routine determination of soap in chemically refined vegetable oils. 相似文献
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采用松香酸皂、油酸皂和萘磺酸钠甲醛缩合物复合乳化体系,通过热法合成丁腈橡胶NBR3604,考察了影响生胶门尼黏度及硫化胶拉伸强度和扯断伸长率等的主要因素。结果表明,合成NBR3604较适宜的配方和工艺条件为:丁二烯56份(质量),丙烯腈44份,软水275份,过硫酸钾0.5份,三乙醇胺0.125份,调节剂丁0.45~0.60份,乳化剂3~4份且松香酸皂与油酸皂质量比为4/6或5/5,聚合温度(30±1)℃,单体转化率(70±2)%。在此条件下的反应过程平稳,产品各项性能符合指标要求,重复性较好。 相似文献
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K. N. Mehrotra V. P. Mehta T. N. Nagar 《Journal of the American Oil Chemists' Society》1970,47(12):519-521
The behavior of copper valerate and caproate in nonaqueous solutions has been investigated from solubility and refractometric
methods. The apparent heat of solutions demonstrate the existence of micellar aggregates above the Krafft point. The refractive
indices of soap solutions in hydrocarbons decrease whereas in alcohols increase with the increase in the soap concentration. 相似文献
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K. N. Mehrotra V. P. Mehta T. N. Nagar 《Journal of the American Oil Chemists' Society》1970,47(9):329-332
Colloid chemical behavior of copper soaps in nonaqueous solvents has been investigated from the surface tension results using
Szyszkowski's empirical equation:γ=γ
o (1 + Xln Y) - X γ
o lnC. The parachors of the soap solutions in hydrocarbons are independent of the soap concentration. However, in alcohols
these values increase with the increase of soap concentration. Hammic and Andrew's mixture law equation has been successfully
applied to explain the behavior in alcoholic soap solutions. 相似文献
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以热失重法测定了五水硫酸铜的纯度,以碘量法作为参照,并与其他方法作了比较。结果表明,用热失重法测定结果的重复性和准确度均较好。 相似文献
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Ben Braae Ulla Brimberg Marianne Nyman 《Journal of the American Oil Chemists' Society》1957,34(6):293-299
Summary An investigation of the removal of soap from neutralized vegetable oils by washing with water has shown that some oils are
obtained practically soap-free after only one water wash whereas the soap in other oils cannot be removed even by repeated
washing. Coconut, palm, and olive oils are easily washed whereas linseed and rapeseed oils are not. Peanut, sunflowerseed,
soybean, and cottonseed oils are sometimes washable and sometimes not.
With unwashable oils different methods for soap determination give inconsistent results because calcium and magnesium soaps,
or other naturally-occurring compounds of these metals, are not determined to the same extent by these methods. Calcium and
magnesium in the crude oils are probably combined with phosphatides or other lipids and remain to some extent in this state
after neutralization. Calcium and magnesium present as soaps or as any other compound may be detected easily in crude, neutralized,
and washed oils by the titration method of Wolff.
Washability of neutralized oils may be improved in a number of ways; the most efficient is pre-treatment with concentrated
phosphoric acid or re-refining with a mixture of sodium hydroxide and sodium carbonate. Either of these treatments can be
applied in batch or continuous refining processes. To prevent contamination of washable oils with calcium and magnesium, soft
water should be used for washing and in preparation of refining solutions. 相似文献
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The use of copper and cadmium oxides or soaps as catalysts for the hydrogenation of unsaturated fatty acids to unsaturated
fatty alcohols has been investigated. It is shown that copper soaps homogeneously activate hydrogen. When copper and cadmium
oxides are used as catalysts, they react with the acid under formation of a homogeneous soap solution. A continuous reaction
system for the preparation of unsaturated fatty alcohols by hydrogenation under the influence of copper and cadmium soaps
is described. 相似文献