排序方式: 共有61条查询结果,搜索用时 93 毫秒
21.
22.
铝酸酯偶联剂改性纳米碳酸钙的工艺研究 总被引:5,自引:0,他引:5
为了解决纳米碳酸钙在涂料中的应用问题,采用正交试验法对铝酸酯改性纳米碳酸钙工艺进行了研究,探讨了改性剂用量、转数、乳化温度、乳化时间和保温时间等因素对纳米碳酸钙改性的影响,并优化出了最佳操作工艺条件:铝酸酯用量为纳米碳酸钙的1.8%(质量分数)、转数16000r/min、乳化温度78℃、乳化时间60min和保温时间40min。测定了改性和未改性纳米碳酸钙的活化指数、吸油量和沉降体积,结果表明铝酸酯改性纳米碳酸钙活化指数可达99.78%,吸油量降为0.1836mL/g,其亲油性得到显著提高。 相似文献
23.
24.
25.
26.
27.
Many by-products are generated in the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide,including cyclohexanol,cyclohexanone,etc.To obtain high-purity 1,2-epoxycyclohexane, the by-products and unreacted cyclohexene must be removed through rectification,in which the vapor-liquid equilibrium(VLE)data of the system are needed.In this study,the VLE data of cyclohexene-cyclohexanol system were studied at 101.3 kPa using an improved EC-2 VLE still.The thermodynamic consistency of the data was examined by Herington’s method.The results obtained were exemplary.The VLE data were correlated by the Wilson equation. The difference between the calculated values and the experimental data is minor,indicating that the VLE data are suitable for engineering design. 相似文献
28.
29.
30.
本文介绍了气泡结晶法的原理及特点,运用该法从氯苯生产副产品混和二氯苯中分离提纯出纯度>99.5%的对二氯笨,并确定了分离级数及各级工艺条件。 相似文献