共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
3.
4.
5.
6.
湿法磷酸净化脱硫新工艺 总被引:4,自引:0,他引:4
湿法磷酸净化脱硫技术难度大。采用分段脱SO4^2-,以碳酸钡与碳酸钙或磷矿粉作为脱硫剂.可使湿法磷酸中SO4^2-的最终脱除率达到99%以上,经中试装置证实该新工艺既节省了成本,又简化了工艺,是切实可行的湿法磷酸净化脱硫新工艺。 相似文献
7.
湿法磷酸净化过程的实验研究 总被引:3,自引:0,他引:3
以开阳磷矿所制湿法磷酸为原料,结合“料浆法”磷铵生产工艺的特点,进行了湿法磷酸净化的实验研究,探索了影响初步净化与深度净化的主要条件及变化规律,找出了适宜的工艺条件,使磷酸中氟、铁、铝等杂质的脱除率达97%以上,获得m(P2O5)/m(F)>1000的净化液,可进一步制取精细磷酸盐。 相似文献
8.
湿法磷酸悬浮净化制取磷酸脲的研究 总被引:1,自引:0,他引:1
对以湿法磷酸和工业尿素为原料合成磷酸脲的工艺进行了研究,探索出了较为适宜的用湿法磷酸悬浮净化法合成磷酸脲的工艺条件和生产工艺流程.通过实验,对合成磷酸脲的主要因素反应温度、反应时间、物料配比、活化剂的用量等工艺条件对产品收率及纯度的影响进行了系统的研究.得出了湿法磷酸直接合成磷酸脲的最佳工艺条件为:反应温度75℃,反应时间0.9 h,反应活化剂RX-Ⅲ用量0.15%(质量分数),尿素与湿法磷酸的物质的量比为1.05:1.为磷酸脲的工业化生产提供了理论依据. 相似文献
9.
10.
11.
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
13.
14.
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.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
15.
16.
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
17.
18.
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
19.
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