共查询到20条相似文献,搜索用时 78 毫秒
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通过采用新工艺,实现了在常压水介质中由硬脂酸与碱式碳酸镁直接反应合成色泽好的高质量硬脂酸镁.试验研完表明:反应温度、反应物料液-固质量比对合成反应速率有较明显的影响;合成优等品硬脂酸镁的适宜的工艺条件为:反应温度80℃,反应物料液-固质量比6:1,反应时间300min。与传统的复分解法工艺相比,该工艺生产效率明显提高,能耗、水耗显著下降、由于可沿用复分解法工艺的生产设备,该工艺特别适用于现采用复分解法工艺的硬脂酸镁生产企业的环保化升级改造。 相似文献
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3热稳定剂硬脂酸镁合成新工艺广东工业大学化工系开发了一种在水介质中由硬脂酸与新生成的氢氧化镁进行皂化反应合成硬脂酸镁的湿法新工艺。与传统的复分解法工艺相比 ,新工艺反应温度明显下降、反应时间大大缩短、反应物料液 -固比大大下低、滤饼湿质量分数显著减少。该工艺适宜的工艺条件为 :第一次加碱量50%化学计量比 ,反应物料液 -固比3∶1,反应温度60℃ ,预反应时间3min;第二次加碱时间2min,续反应时间5min[65]。直接法合成硬脂酸锌的正交试验设计及最佳工艺条件的确定河北科技大学研究了硬脂酸和氧化锌在催化… 相似文献
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水介质直接法清洁合成硬脂酸锌研究 总被引:3,自引:0,他引:3
研究了在水介质中常压免添加剂由碱式碳酸锌与硬脂酸直接反应清洁合成硬脂酸锌,结果表明:反应温度、反应物料液-固比对合成反应速率有较明显的影响,合成优等品硬脂酸锌的适宜工艺条件为:反应温度80℃,反应物料液-固比7:1,反应时间30min。 相似文献
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在常压的反应锅内,通过一定的工艺生产方法,在水介质的状态下,由硬脂酸与氢氧化钙直接一步法合成硬脂酸钙产品。生产试验表明,反应速度受反应的氢氧化钙的纯度与细度、反应的固液比等因素的一定影响。工艺条件:油水比:1∶8,氢氧化钙的纯度与细度:96%以上、120目,反应温度:60~65℃,反应时间:150 min左右。生产设备:可沿用复分解二步法的设备,需局部的增改。新工艺特点:生产工艺简单,不产生废水,生产成本低。 相似文献
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直接法工艺合成硬脂酸钙的研究及工业化生产 总被引:1,自引:0,他引:1
文章研究了硬脂酸与氢氧化钙,在双氧水的催化作用下,在水相中合成硬脂酸钙的工艺,并进行了工业放大实验,得到了与复分解法合成的硬脂酸钙指标类似但品质更为纯净的硬脂酸钙。并且该方法工艺简单,不存在废水问题。 相似文献
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皂化法合成硬脂酸钙,锌新工艺 总被引:3,自引:0,他引:3
介绍一种在水介质中由梗脂酸与新生成的氢氧化钙、锌进行皂化合成硬脂酸钙、锌的新工艺。与传统的复分解法工上比新工在大提高了生产效率、降低了能耗和水解. 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