To synthesize aryl pyrimidines by taking benzene, methyl benzene, acetic ether, 1,2-dichloroethane as solvent, the yield and purity of the product are high by taking methyl benzene as solvent. 分别选用苯、甲苯、乙酸乙酯、二氯乙烷作为溶剂合成桂皮酰哌啶,结果表明甲苯作为溶剂时产品纯度高,收率高,可用于大规模生产。
Objective: To found a method to detect the residual solvents of Penicillin Sodium for Injection: butanol, acetic ether and butyl acetate. 前言:目的:建立一种气相色谱法同时测定注射用青霉素钠中有机溶剂丁醇、乙酸乙酯、乙酸丁酯残留量的方法。
Methods Using ethanol and acetic ether to replacement the solvent used in literature way to improve the yield and the reliability of synthetic method. 方法通过改变文献合成中间体及兰索拉唑粗品过程中所用溶剂,改用乙醇、乙酸乙酯为溶剂,提高产物的收率及合成的安全性。
The high polymer reinforced emulsion A can be chosen one or more from acrylic emulsion, acetic ether emulsion, polyurethane emulsion and emulsion. 所述的高分子增强乳液A可以在丙烯酸乳液、醋酸乙酯乳液、聚氨酯乳液、明胶乳液中选取一种或几种;
Activity and stability of the catalyst were examined for synthesis of acetic ether. 以乙酸乙酯合成反应为模型反应考察其催化活性和稳定性。
The article is about how to use phosgene and p-nitrophenylamine to react in acetic ether's liquefier to produce p-nitro-phenyl isocyanate, Its best technological condition have been discussed. 介绍用光气和对硝基苯胺在乙酸乙酯溶剂中反应来制备对硝基异氰酸苯酯的方法,并讨论了其最佳工艺条件。
For the same blending system, the penetration rates for acetic ether, absolute alcohol and gasoline, increase in sequence. 对同一体系,对乙酸乙酯渗透率最小,无水乙醇次之,汽油最大。
The effects of catalyst treated methods, catalyst quantity, reaction time, acid-alcohol ratio and catalyst length-of-live are studied in batch synthesis of acetic ether. 考察了催化剂处理方式、醇酸比、催化剂用量、反应时间对合成乙酸乙酯的影响及催化剂重复使用的活性。
Conclusion: both methods are applicable for the quality control of triptolide alcohol, yet the separation and determination outcome were better for the sample treated with acetic ether. 结论:2种含量测定方法均可用于雷公藤内酯醇的质量控制,尤以乙酸乙酯处理样品的方法分离、测定效果较好。
To study the chemical constituents in acetic ether and n-butyl alcohol fractions from the roots of Isatis indigotica alcohol extract. 研究板蓝根乙醇提取物的醋酸乙酯和正丁醇萃取层中的化学成分。
With reaction distillation process to make acetic acid in used acetic acid solution form acetic ether, achieving the purpose of recovery acetic acid. 通过反应精馏工艺技术,使废乙酸溶液中的乙酸生成乙酸乙酯,达到回收乙酸目的。
Hydrophilic membranes were prepared with key components of sodium silicate, acetic ether, polyacry-lamide, etc. 以硅酸钠、乙酸乙酯、聚丙烯酰胺等为主要成分制备出亲水膜层。
The results confirmed the desirability of ketone-ester, especially acetone and acetic ether, solvents. 结果表明,酮-酯(丙酮-醋酸乙脂)系列的溶剂是可取的。
Coefficient of variation: methanol 3.4%, acetic ether 2.6%, and iso-propyl alcohol 2.4%. 异丙醇98.3%-103.3%变异系数甲醇3.4%乙酸乙酯2.6%异丙醇2.4%。结论:方法重现性好,定量准确,便于操作。
Acetohydroxamic acid ( AHA) is synthesized by the method of hydrochloric hydroxylamine reaction with acetic ether in alcohol water medium and its structure is characterized by element analysis, IR, MS, et al. 在乙醇水体系中,用乙酸乙酯和盐酸羟胺为主要原料合成了乙异羟肟酸(AHA),并通过元素分析、红外光谱(IR)、质谱(MS)等方法对其结构进行了表征。
Rifampicin in acetic ether solution was determined by double-beam spectrophotometry ( 478nm). 乙酸乙酯萃取液经离心后,用双光束方式于478nm进行测定。
Measurement and Correlation of Isobaric Vapor Liquid Equilibrium Data for Vinyl Acetate Acetic Ether and Acetic Acid Glycol Diacetate 乙酸乙烯-乙酸乙酯及乙酸-乙二醇二乙酸酯二元体系汽液平衡数据的测定和关联
The catalytic behavior of heteropoly selenium-vanadic compounds ( NH_4)_7 [ HSe_4V_ ( 10) O_ ( 37)] · 9H_2O was researched on the basis of synthesized reactions of acetic ether and acetic. 本文以催化合成乙酸乙酯和乙酸两个实验为基础,对硒-钒类杂多化合物(NH4)7[HSe4V10O37]·9H2O的催化性能进行了初步的探讨和研究。
Study on Preparation of Acetic Ether with Lewis Acid as Catalyst 路易斯酸催化制乙酸乙酯的研究
Synthesis of Acetic Ether by Supported-type Solid Acid 负载型固体酸催化合成乙酸乙酯
A synthetic process of acetohydroxamic acid was prepared with hydroxylamine hydrochloride and acetic ether. The optimum reaction conditions such as ratio of feedstock, time and temperature of reaction were investigated. 本文研究了盐酸羟胺与乙酸乙酯反应制备乙酰氧肟酸的合成工艺及反应的溶剂体系,确定了投料配比、反应时间、反应温度等工艺条件。
The Discussion of Experimental Data Processing Method for Determining the Rate Constant of Saponification Reaction of Acetic Ether 对测量乙酸乙酯皂化反应速度常数实验数据处理方法的探讨
The results showed that the volatile compositions in liquid milk product contained mostly aldehyde, alcohol, isoamyl alcohol, ethyl formate, acetic ether, isobutyl acetate, isoamyl acetate, n-butyl acetate. 结果表明液态奶制品的挥发性成分主要有乙醛、乙醇、异戊醇、甲酸乙酯、乙酸乙酯、乙酸异丁酯、乙酸异戊酯和乙酸正丁酯等。
Nonlinear fitting method is applied to calculate the rate constant of the acetic ether saponification reaction. 将非线性拟合方法应用于电导法测定乙酸乙酯皂化反应速率常数的实验数据处理。
A method for the determination of chloroform and acetic ether by GC was established. 建立了GC测定单硝酸异山梨酯中氯仿、乙酸乙酯残留量的方法。
METHOD Limited cultivation matrix was adopted to cultivate fermented bamboo parasitic fungus and then the fermentation fluid was extracted with acetic ether. Experiments were carried out on the antibiotic activity of the extracts. 方法采用限定性培养基质,对竹黄菌进行发酵培养,然后用乙酸乙酯萃取发酵液,对萃取物进行体外抗菌实验。
The alcohol extract would be extracted with petroleum benzin, chloroform, acetic ether and n-butanol in turn after being mixed with water. Recover the solvent together with the water layer extract. Thus, we gained five samples of different polarity. 醇浸膏水混悬后,依次以石油醚、氯仿、乙酸乙酯、正丁醇萃取,连同萃取后的水层(及混悬物)分别回收溶剂,得到相应不同极性的五部分样品。
Acetic ether extracts of Centella asiatica showed ability of inhibiting the spleen lymphocyte proliferation induced by LPS and ConA. 积雪草乙酸乙酯相提取物可抑制由LPS及ConA诱导的小鼠脾淋巴细胞增殖,积雪草正丁醇相提取物可抑制由ConA诱导的小鼠脾淋巴细胞增殖。