1) one step sulfonation reaction
直接磺化法
1.
Based on one step sulfonation reaction, the purification of soluble organic reagent PAN 6s by salting out is described.
报告了 PAN直接磺化法制备 PAN- 6s的盐析提纯方法 ,筛选出价格低廉 ,本身不含结晶水、并且其溶解度基本不随温度变化而变化的氯化钠为盐析剂 ,避免了水重结晶易使杂质包藏在产品晶体中的缺陷 ,大大地改善了产品的纯度 ,用该法可获纯度达 99。
2) direct sulfonation
直接磺化作用
3) esterification
[英][e,sterifi'keiʃən] [美][ɛ,stɛrəfə'keʃən]
直接酯化法
1.
Five long-chain saturated alkanoyl-6O-D-isoascorbates(alkanoyl=decanoyl,lauroyl,myristoyl,palmitoyl and stearoyl) were synthesized by esterification(or transesterification) of D-isoascorbic acid with alkanoic acids using concentrated H_2SO_4 as a medium and a catalyst at room temperature.
用浓H2SO4作为反应介质和催化剂,通过直接酯化法或酯交换法合成了5个D-异抗坏血酸脂肪酸(癸酸,月桂酸,豆蔻酸,棕榈酸和硬脂酸)酯,其结构经1H NMR和IR表征。
4) direct fluorination
直接氟化法
1.
There are two methods for synthesis of the fluoroporphyrins: direct and indirect fluorination.
含氟卟啉合成方法分为直接氟化法和间接氟化法。
5) direct bromination
直接溴化法
1.
2-bromothiophene was synthesized respectively by three methods: acetic acid solvent,carbon tetrachloride solvent and direct bromination.
分别采用冰乙酸溶剂法、四氯化碳溶剂法、直接溴化法合成了2-溴噻吩,重点考察了加溴方式、加溴时间、原料配比、反应温度等影响因素对直接溴化法生产2-溴噻吩工艺的影响,并对三种生产工艺的生产成本进行了对比分析。
6) direct esterification
直接酯化法
1.
Pentaerythritol tetramethylacrylate is synthesized by direct esterification,and the effects on the reaction of esterification are studied.
采用直接酯化法合成了季戊四醇四甲基丙烯酸酯,通过研究影响该酯化反应的几个因素,确定了最佳反应条件:n(季戊四醇)∶n(甲基丙烯酸)=1∶8,以对甲基苯磺酸为催化剂,N,N-二环己基碳酰亚胺为脱水剂,对苯二酚为阻聚剂,它们分别占醇酸总质量的6。
2.
This paper introduces the market of ethylene glycol monoethylether acetate at home and abroad,also illustrating major production processes:direct esterification,ester interchange and one step synthesis method.
介绍了乙二醇单乙醚醋酸酯国内外市场情况和３种主要生产方法：直接酯化法、酯交换法、一步合成法。
补充资料：脲、甲醛、磺化-2-甲基苯酚、磺化苯酚的缩合物钠盐
CAS:68441-84-9
分子式: (C7H8O·C6H6O·CH4N2O·CH2O·Na)x
中文名称: 脲、甲醛、磺化-2-甲基苯酚、磺化苯酚的缩合物钠盐
英文名称: Urea, polymer with formaldehyde, sulfonated 2-methylphenol and sulfonated phenol, sodium salt
urea, polymer with formaldehyde, sulfonated 2-methylphenol and sulfonated pheno
分子式: (C7H8O·C6H6O·CH4N2O·CH2O·Na)x
中文名称: 脲、甲醛、磺化-2-甲基苯酚、磺化苯酚的缩合物钠盐
英文名称: Urea, polymer with formaldehyde, sulfonated 2-methylphenol and sulfonated phenol, sodium salt
urea, polymer with formaldehyde, sulfonated 2-methylphenol and sulfonated pheno
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条