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环戊二烯选择加氢制环戊烯 总被引:1,自引:0,他引:1
用Pd催化剂在固定床反应器中进行了环戊二烯选择加氢制备环戊烯研究;确定了第一段加氢催化剂采用Pd含量为0.5(wt)%载体为γ-Al2O3催化剂,第二段加氢催化剂为钯含量为0.3(wt)%载体为γ-Al2O3催化剂。第一段氢烃摩尔比为2—3,反应压力为1.2MPa,空速2~4h~,温度55—60℃,第二段氢烃摩尔比为3.5~4,温度80~85℃时,环戊二烯的转化率达99.5%,环戊烯的选择性在90%以上。 相似文献
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环戊二烯液相加氢制备环戊烯的研究 总被引:2,自引:0,他引:2
介绍了以工业级双环戊二烯为原料,经过解聚-精馏得到高纯度的环戊二烯,以骨架镍为催化剂,对环戊二烯液相加氢制备环戊烯的影响因素进行了研究。结果表明,在反应温度25~30℃,氢气分压为1.0。1.5MPa,无水乙醇作为溶剂,v无水乙醇:V环戊二烯为5~6:1,催化剂用量为4%。5%,搅拌速度为800r/min条件下,反应时间2~3h,环戊二烯的转化率大于98%,环戊烯的选择性大于95%。 相似文献
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环戊二烯加氢制环戊烯的研究 总被引:2,自引:0,他引:2
研究了环戊二烯加氢制环戊烯的工艺技术,重点考察了氢气压力,搅拌速度,催化剂投入量,反应温度和催化剂活性稳定性等加氢工艺条件,环戊二烯加氢的条件为:催化剂投料量0.3%-0.6%,氢气压力为0.8-1.5MPa,搅拌速度大于600转/分,加氢温度小于32℃,在理想的条件下,使用细颗粒Pd/C催化剂,环戊二烯转化率大于95%,环戊烯选择性大于90%。 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