共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
对氯苯甲醛的生产和应用 总被引:1,自引:0,他引:1
对氯苯甲醛可通过对氯甲苯氯化水解法、对氯甲苯氧化水解法、对氯甲苯电化学氧化法和对硝基甲苯氧化还原法4种方法制得。对氯苯甲醛可广泛应用于医药、农药、染料工业等方面,具有良好开发前景 相似文献
3.
4.
7.
8.
氯化水解法制备对氯苯甲醛的研究 总被引:2,自引:0,他引:2
介绍了用氯化水解法制备对氯苯甲醛的工艺路线。以对氯甲苯为原料,在光照情况下进行了氯化,然后在稀HNO3溶液中进行催化水解制得最终产品,反应总收率达71.5%。 相似文献
9.
10.
11.
新法制备2-氯-5-氯甲基吡啶 总被引:15,自引:1,他引:15
2-氯-5-氯甲基吡啶是农药和医药的重要中间体,采用新法制备2-氯-5-氯甲基吡啶具有纯度高,原料成本低等优点,是最佳工艺路线,该法投入生产,将为农药吡虫啉等降低成本,该产品的生产将有明显的社会效益和经济效益。 相似文献
12.
2-氯-4,6-二硝基间苯二酚的结晶动力学研究 总被引:2,自引:0,他引:2
采用间歇动态法测定了2-氯-4,6-二硝基间苯二酚(CDNR)的结晶动力学参数,并回归了CDNR的结晶动力学方程,分析了结晶动力学的影响因素。通过回归结晶成核速率方程和生长速率方程的计算,得到了一定温度、一定搅拌速度下的成核、生长速率常数,温度27℃、搅拌速度180 r.min-1时成核速率常数和成长速率常数分别为9.17×106和2.17×10-12,温度33℃、搅拌速度240 r.min-1时成核速率常数和成长速率常数分别为2.02×108和7.10×10-12。 相似文献
13.
14.
详细阐述了氯(卤)代异戊烯醋酸酯在合成VA、VE、六氢法呢醇、薰衣草醇、羟基香茅醇系列、食用色素、降血脂药及降血糖药中的应用及其合成方法,为异戊二烯的市场开发提供了一个新的领域。 相似文献
15.
16.
17.
介绍国产CS—1—Cat在三套连续法聚丙烯装置的工业应用情况。对CS—1—Cat和进口TK—Cat所生产出来的粉料及产品性能进行比较。 相似文献
18.
Benjamin A. Lowery Brad Andersh Terry A. Isbell 《Journal of the American Oil Chemists' Society》2013,90(6):911-917
Vegetable oil based lubricants typically have improved lubricity and biodegradability over their mineral oil based counterparts. However, vegetable oil lubricants often fail to meet the performance standards of mineral based oils with respect to cold temperature and resistance to oxidation. Olefins are an oxidatively weak point for vegetable based compounds. Removal of the olefin in a vegetable based lubricant through functionalization may increase resistance to oxidation. If the added functionality also causes branching of the alkyl chain, cold temperature properties may be improved. Any chemical modifications considered must be scalable and cost-effective to be useful in a commercial application. In this study, methyl oleate was functionalized into a chloro alkoxy derivative. Sodium hypochlorite (household bleach) and calcium hypochlorite were both used to generate hypochlorous acid in situ. Hypochlorous acid and a series of alcohols (methanol, ethanol, and butanol) were reacted with methyl oleate to make chloro alkoxy compounds in 29.8–77.9 % yields. In an effort to make a branched saturated ether we removed the chlorine moiety of the chloro alkoxy compounds. Dehalogenation was achieved under basic conditions over a Pd/C catalyst in 2-propanol. Reaction times increased substantially as the size of the adjacent alkoxy group increased. The reaction rate could be improved by heating the reactions above 100 °C in a pressure reactor. Increased reaction temperature also resulted in an increase in ketone side products from the competing elimination reactions. Saturated ether yields were 4.1–43.2 %. 相似文献
19.
农药中间体2—氯—5—氨甲基吡啶的合成研究 总被引:4,自引:0,他引:4
农药重要中间体2-氯-5-氨甲基吡啶是由N-(2-氯代吡啶-5-甲基)-邻苯二甲酰亚胺先在碱水溶液中水解,再在稀酸中水解而制得的高收率产品,讨论了反应条件对合成反应的影响。产品总收率为82%以上。 相似文献
20.
3,4—二氯硝基苯氟化工艺的研究 总被引:1,自引:0,他引:1
本文详细研究了由3,4-二氯硝基苯制备3-氯-4-氟硝基苯的主要影响因素,如投料比、反应温度、反应时间等,收率可达91.32%,硝化物与氟化洋比为1:1.13,DMSO/KF=2.3ml/g。 相似文献