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丙烯酸钠的聚合及吸水性能研究 总被引:4,自引:0,他引:4
以正己烷为连续相,司班80为分散剂,N,N‘-亚甲基双丙烯酰胺为交联剂,过硫酸钾为引发剂,采用反相悬浮聚合法合成了高吸水性聚丙烯酸钠树脂。通过调整分散剂、引发剂、交联剂的用量,制备了几种高吸水性的树脂。在制得的高吸水性聚丙烯酸钠树脂中,性能最好的树脂吸去离子水为550mL/g,吸自来水为170mL/g,吸0.9%NaCl溶液60mL/g。 相似文献
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反相悬浮法制备高耐盐性吸水树脂的研究 总被引:1,自引:0,他引:1
以环己烷为分散介质,吐温80为分散剂,过硫酸钾为引发剂,N,N-亚甲基双丙烯酰胺为交联剂,采用反相悬浮共聚合成AA/AM高耐盐性树脂,研究了单体、引发剂、交联剂、中和度、分散剂等对树脂吸液性能的影响,得到最佳工艺条件下产物在蒸馏水和生理盐水中的吸液率分别为1092g·g-1和171g·g-1,该产品具有良好的热稳定性和保水能力。 相似文献
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反相悬浮法制取耐压型聚丙烯酰胺吸水性树脂 总被引:4,自引:0,他引:4
以K2S2O8为引发剂,N,N′-亚甲基双丙烯酰胺为交联剂,用反相悬浮聚合法合成了交联聚丙烯酰胺,研究了引发剂、交联剂、分散剂及水解条件对其吸水性能的影响,得到了粒径为290μm,吸去离子水倍数和吸油井内矿化水倍数分别为220与180,压力为1.0×107Pa条件下,保水率达50%的球状粒子. 相似文献
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以甲基丙烯酸丁酯(BMA)和丙烯酸丁酯(BA)为单体、N,N′-亚甲基双丙烯酰胺为交联剂、过氧化苯甲酰为引发剂、聚乙烯醇为分散剂、水为分散介质,采用悬浮聚合法制备了自溶胀型的吸油树脂,并通过正交实验考察了交联剂、致孔剂对树脂吸油性能的影响.结果表明,当n(BMA):n( BA)=1:2、引发剂用量为0.8%、交联剂用量为1.6%、分散剂用量为5.0%、温度为80℃、反应时间为5 h、水油比为7:1时,甲苯的吸油率为17.24 g·g-1,致孔剂乙酸乙酯的加入使甲苯的吸油率提高至25.24 g·g-1. 相似文献
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以纤维素为基体,丙烯酰胺(AM)、甲基丙烯酸丁酯(BMA)为接枝单体,过硫酸钾为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,聚乙烯吡咯烷酮为分散剂,通过悬浮接枝聚合法制备出了纤维素基吸水吸油材料;考察了单体用量、引发剂用量、反应时间、反应温度及交联剂用量等因素对接枝聚合物的吸水、吸油性能的影响。结果表明:在单体与纤维素的质量比为3.0∶1.0,AM∶BMA的质量比为2.0∶1.0,相对于单体,引发剂质量分数为6.0%,交联剂质量分数为0.5%,分散剂质量分数为0.5%,反应温度为70℃,反应时间为4 h的条件下,得到纤维素-AM-BMA接枝共聚物,其吸油倍率为11.55 g/g,吸水倍率为23.51 g/g,聚合度为534.6。 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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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献