共查询到20条相似文献,搜索用时 109 毫秒
1.
介绍了高效除草剂精恶唑禾草灵的制备方法,分析了其制备过程中的关键中间体为2,6-二氯苯并恶唑,并介绍了2,6-二氯苯并恶唑的制备方法。 相似文献
2.
3.
4.
5.
碱式碳酸锌制备的研究 总被引:5,自引:0,他引:5
研究了以精制硫酸锌和农用碳酸氢氨制备碱式碳酸锌的工艺过程。对制备过程进行了热力学分析,并分析确定了制备产物的主要构成,探索了碳酸氢铵用量等因素对制备过程的影响 相似文献
6.
《中国石油和化工标准与质量》2017,(24):160-161
本文详细介绍了氯乙烯制备工艺的相关内容,先介绍了氯乙烯制备工艺的发展现状,并阐述了现阶段常见的氯乙烯制备工艺,包括电石乙炔、乙烯直接氯化法等,之后详细介绍了一种氯乙烯制备工艺流程,并对其应用效果进行评价,希望能够为氯乙烯生产有所帮助。 相似文献
7.
8.
9.
10.
11.
12.
简介了注塑模内贴标成型原理、工艺和应用发展趋势,根据实际产品的应用案例分析了注塑模内贴标在塑料产品成型过程中的影响因素和工艺要点,提出了模内贴标塑料模具的特点及其设计的一般原则,分析了模内贴标产品的常见缺陷,并给出了改善措施. 相似文献
13.
机械密封的可靠性分析 总被引:3,自引:0,他引:3
探讨了机械密封的失效类型 ,给出了机械密封失效模式的威布尔表达式。分析了现场收集机械密封可靠性数据时应注意的几个问题 ,对可靠性数据参数估计常用的几种数值分析法进行了详细论述 ,最后给出了机械密封可靠度及寿命的计算表达式 相似文献
14.
15.
16.
Y. Volkman 《Journal of Applied Electrochemistry》1978,8(4):347-352
The performance of a packed-bed electrochemical reactor with a parasitic reaction is analysed. Current efficiency and energy consumption are calculated using a linear approximation to the polarization equation. The results are presented as a function of dimensionless variables, which are characteristic of electrode and process parameters. The adverse effects of the parasitic reaction are estimated and ways to avoid them are discussed. 相似文献
17.
G. B. Skripchenko 《Solid Fuel Chemistry》2010,44(5):287-292
Anthracites of thermal metamorphism from different basins of Russia and the Ha-Tu coalfield of Vietnam are characterized,
and data on their petrographic and chemical compositions, structure, and properties are presented. Alterations in the structure
and properties of Ha-Tu anthracite during thermal treatment are described. Data on anthracite reserves are reported, and possible
lines in their advanced use are discussed. 相似文献
18.
Borosilicate glasses of two compositions are synthesized and investigated with the aim of preparing glass microspheres from them. Using the Appen and Okhotin additive methods, the physicochemical properties of the glasses and melts are calculated, their crystallization ability and water stability are experimentally studied, their intrinsic temperatures are determined using dilatometry and differential scanning calorimetry, and their TLCE values are obtained. 相似文献
19.