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- N-phenylmaleimide was synthesized with the closing-ring dehydration catalyst of nickel diacetylacetonate(Ni(acac)2) by acetic anhydride method. 以乙酰丙酮镍为闭环脱水催化剂,运用改进的醋酐法,合成了N-苯基马来酰亚胺。
- Decompressed azeotropic method,a totally new method for the preparation of N-phenyl maleimide(N-PMI),is developed on the basis of acetic anhydride method and atmospheric azeotropic method. 在乙酐法和共沸脱水法的基础上,开发了一条新工艺,减压共沸法合成N-苯基马来酰亚胺。
- The research is focused on the cyclic dehydrationreaction. The yield of N-PMI is 84.91% in acetic anhydride method; 着重对脱水环合反应进行了条件实验;采用乙酐法时;收率达到84.;91%25;
- Innovation on production process of chloroacetic acid by acetic anhydride method 醋酐法氯乙酸生产工艺的改进
- The study shows that HMX prepared from the acetic anhydride method tends to restructuring mechanism; 研究表明,在醋酐法制备HMX的过程中倾向于重组机理;
- Keywords chloroacetic acid;production process;acetic anhydride method;sulfur method;catalytic system;co-production chlor-alkali combination; 氯乙酸;生产工艺;醋酐法;硫磺法;催化体系;氯碱联合配套;
- acetic anhydride method 醋酐法
- Influence of pH on Yield of DPT Prepared Without Acetic Anhydride. 非醋酐法合成DPT与pH值的关系
- Subject to control the chemicals acetic anhydride, ephedrine etc. . 受管制化学品乙酸酐、麻黄碱等.
- By the improved method, proglumide was synthesized in acetic anhydride with toluene as the dehydrating agent. 本文报道合成抗溃疡药丙谷胺的改进工艺。
- The yttrium chloride was dehydrated by acetic anhydride[(CH 3CO) 2O]. The method was simple,less pollution and easy operation. 在YCl3·6H2 O脱水制备YCl3 的过程中 ,采用醋酸酐脱水法 ,具有方法简单 ,污染小 ,且易于操作等特点
- Add the crystalline dihydrate(5g)to acetic anhydride(10??in a beaker. 向盛有10?蟠姿狒?的烧杯内加入5g二水合物结晶。
- A new synthetic method,by which N-acetyl-L-threonine was produced from L-threonine in alkaline solution using acetic anhydride as acetylation agent,was described. 以L-苏氨酸为原料,采用在碱性条件下用乙酸酐作为乙酰化试剂合成N-乙酰-L-苏氨酸的新工艺。
- The kinetics of esterification of linalool with acetic anhydride was studied. 研究了芳樟醇与乙酸酐酯化反应动力学。
- The endo anhydride method is the main process in chemical synthesis today. 化学合成法中的内酐法为现阶段的主要生产方法;
- A new synthetic method, in which N acetylation of L glutamic acid was proceeded in alkaline solution using acetic anhydride as acetylation agent, was described. 以L-谷氨酸为原料,在碱性条件下用乙酸酐作为乙酰化试剂一步合成N-乙酰-L-谷氨酸的新工艺。
- Acetylsalicylic acid has been synthesized using salicylic acid and acetic anhydride with microwave radiation catalyzed by aluminum chloride. The effecting factors of this method were also discussed. 摘要以水杨酸和乙酸酐为原料,以无水三氯化铝作催化剂,微波辐射合成了乙酰水杨酸,并讨论了影响反应的因素。
- This may be readily converted to the anhydrous salt by reaction with a readily hydrolysed material, such as acetic anhydride. 这和易水解的物质如醋酸酐反应可以很容易转变为无水盐。
- The finite-element method is utilized to solve the model for the reactive distillation process of hydration of acetic anhydride giving the concentration profiles on the tray and analyzing its influence on the efficiency of reactive distillation process. 利用有限元法求解数学模型;得到了乙酐水合生成乙酸的反应精馏塔板上的浓度分布;并进一步分析了液相速度分布对应精馏效率的影响.
- L-Alanyl-L-glutamine(Dipeptiven) was prepared in 10 t/a pilot-plant-scale by using phthalyl method and mixed anhydride method. 以邻苯二甲酰基为保护基,采用混合酸酐法接肽,中试规模制备了L-丙氨酰-L-谷氨酰胺(力肽)。