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- Several of costly solvents and chemicals such as DMF,dichloromethane,methyl acetoacetate,pivalic acid etc. left in waste liquid during the cephradine manufacturing process. 头孢拉定生产中的废液组分为DMF、二氯甲烷、特戊酸、乙酰乙酸甲酯和高沸点固体杂质,其中DMF、特戊酸、乙酰乙酸甲酯的经济价值均极高。
- Keywords polyarylate;acetoacetic acid group;acetylizing; 聚丙烯酸酯;乙酰乙酸基团;乙酰化;
- N,N-Dihydroxyethyl-acetoacetamide,the raw material of the borate ester bonding agent,was synthesized from methyl acetoacetate and diethanolamine. 二乙醇胺与乙酰乙酸甲酯反应合成了硼酸酯键合剂原料N,N-二羟乙基乙酰乙酰胺。
- The barnidipine hydrochloride were prepared via cyclocondensation from m-nitrobenzaldehyde, methyl acetoacetate and anmmonium bicarbonate, hydrolysis, esterification with opticaliy (S)-N-Benzyl-3-py-rrolidinol, recrystallisation and salification. 摘要研究了以碳酸氢铵，间硝基苯甲醛和乙酰乙酸甲酯为原料，经缩合、部分水解，再与(s)-N-苄基－3-羟基吡咯烷经酯化、分步重结晶、成盐得到盐酸巴尼地平的工艺路线。
- Gas chromatography(GC) as a chemical reactor,methyl acetoacetate,ethyl acetoacetate,and methyl(3-oxo) pentanoate can undergo transesterfication with various alcohols without any catalyzers. 在气相色谱上,乙酰乙酸甲酯、乙酰乙酸乙酯、3-氧代戊酸甲酯与醇在无任何催化剂存在下,发生酯交换反应。
- Keywords methyluracil;methyl acetoacetate;urea; 甲基尿嘧啶;乙酰乙酸甲酯;尿素;
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
- Can Jones beat Smith? That's the acid test. 琼斯能击败史密斯吗？那是个严峻的考验。
- acetoacetic acid decarboxylase 乙酰乙酸脱羧酶
- Manufacturing and Application of Methyl Acetoacetate 乙酰乙酸甲酯的生产及其应用
- A salt or an ester of boric acid. 硼酸盐一种硼酸盐或硼酸酯
- acetoacetic acid ethylester 乙酰乙酸乙酯
- She dropped acid in high school. 她高中时代服迷幻药。
- The metal is fretted with the acid. 金属被酸腐蚀。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- The acid has eaten through the metal cover. 酸已把金属盖子蚀穿了。
- The worker's overalls were badly burned by acid. 这位工人的工作装被酸腐蚀得很厉害。
