乙酸水解

The influence of hydrolysis time、temperature、acid concentration and solid to liquid ratio on xylose、 arabinose and acetic acid concentration are assessed by single factor.

单因素法考察了水解时间、温度、酸浓度以及料液比对木糖、阿拉伯糖、乙酸浓度的影响，并用均匀设计法优化了麦糟水解条件，确定了水解的最佳工艺条件100.4mgH2SO4/g干麦糟，温度138℃，料液比1∶6，时间270min。

Ingredients:Water,Hamamelis Virgin-iana Water,Glycerin,Olive Oil Peg-7 Esters,Gm Euglena Gracilis Polysaccharide,Betaine,Aloe Barb-adensis Leaf Juice,Hydrolyzed Wheat Protein,Sodium Pca,Tocopheryl Acetate,Polysorbate 20,Creatine,Hyaluronic Acid,Tetrasodium Edta,Perfume

成分：去离子水，金缕梅蒸馏液，甘油，橄榄油，PEG-7酯类，细小裸藻多糖，甜菜碱，芦荟叶提取物，水解小麦蛋白，吡咯烷酮羧酸钠，生育酚乙酸酯，聚山梨醇酯-20，肌酸，透明质酸，乙二胺四乙酸四钠，香精，苯氧乙醇，辛二醇，山梨酸。

Main Ingredients: Water,Hamamelis Virginiana Water,Glycerin,Propylene Glycol,Gm Euglena Gracilis Polysaccharide,Betaine,Aloe Barbadensis Leaf Juice,Hydrolyzed Wheat Protein,Sodium Pca,Tocopheryl Acetate,Polysorbate 20,Creatine,Hyaluronic Acid.

主要成分：去离子水，金缕梅蒸馏液，甘油，丙二醇，细小裸藻多糖，甜菜碱，芦荟叶提取物，水解小麦蛋白，吡咯烷酮羧酸钠，生育酚乙酸酯，聚山梨醇酯-20，肌酸，透明质酸，乙二胺四乙酸四钠，香精，苯氧乙醇，辛二醇，山梨酸。

Reaction (1) was examined with different kinds of acetal substrate(1) and vinyl ethyl ether, and the results indicated that the 1, 1,3-triethoxy compounds could be obtained in high yields of 88 and 97% respectively when the R groups of the acetal are phenyl and anisyl, while the yields amounted only to 55-75 % for R=a...

有证据表明这种催化反应也可能是通过正碳离子中间体进行的。本反应的产物1，1，3-三乙氧基化合物经乙酸/乙酸钠溶液水解可得反式α，β-不饱和醛。水解产率：芳香族产物大于90%，脂肪族产物大于75%。

Ingredients: Water,Hamamelis Virginiana Water,Glycerin,Propylene Glycol,Glyceryl Polymethacrylate,Betaine,Aloe Barbadensis Leaf Juice,Hydro-lyzed Wheat Protein,Sodium Pca,Tocopheryl Acetate,Polysorbate 20,Creatine,Hyaluronic Acid,Tetrasodium Edta,Perfume,Phenoxyethanol,Caprylyl Glycol,Sorbic.

成分：去离子水，金缕梅蒸馏液，甘油，丙二醇，甘油聚甲基丙烯酸酯，甜菜碱，芦荟叶提取物，水解小麦蛋白，吡咯烷酮羧酸钠，生育酚乙酸酯，聚山梨醇酯-20，肌酸，透明质酸，乙二胺四乙酸四钠，香精，苯氧乙醇，辛二醇，山梨酸。

In the presence of sodium as catalyst, the ester exchange reaction between methyl dimethoxy acetate and cephalotaxine produced cephalotaxine dimethoxy acetate, which was then hydrolyzed in dilute hydrochloric acid. Spectrum analysis showed one of hydrolytic products was cephalotaxinone.

本文报导己二甲氧基乙酸甲酮和三尖杉碱在金属钠催化下，直接进行酯交换反应生成二甲氧基乙酸三尖杉酯，后者在稀盐酸中水解，水解产物之一经光谱分析碳定为三尖杉酮碱。

The difficulty of route is the refinement of products. There is a lot of sodium chloride in solution. In order to refine the glycolic acid, the methods of vacuum distillation and organic solvent extraction are adopted.

水解合成后得到的是羟基乙酸的水溶液，其中含有大量的氯化钠和少量未水解的氯乙酸及其它杂质，采用减压蒸馏及有机溶剂萃取方法进行精制是比较适宜。

The amount of hydroxyacetic acid , equal to that of sodium chloride, produced from chloroacetice acid hydrolysis is determined by adopting Moore method and there fore the ratio of transformation of chloroacetice acid hydrolyzed can be calculated.

氯乙酸水解生产羟基乙酸的工艺过程中产生等物质量的氯化钠，采用莫尔法测定氯乙酸水解的产物氯化钠，并计算氯乙酸的水解转化率，从而选择和控制水解反应的条件。

The invention relates to a fabric nanometer following cleaning agent for obtaining TiO2/ZnO composite hydrosol, and relative production and cleaning method, wherein it uses butyl titanate and zinc acetate as predecessor, uses glacial acetic acid as catalyst and peptizer, uses water as solvent, uses absolute ethyl alcohol as the solvent of butyl titanate, and uses ethanolamine as deposit agent and supplies OH-, to be hydrolysed and polycondensated to form TiO2/ZnO composite hydrosol. And its components and mass percents are: butyl titanate at 1-15%; zinc diethyl at 1-12%; absolute ethyl alcohol at 1-20%; glacial acetic acid at 5-15%; and aminoethyl alcohol at 0.1-5%, and the left is water. The invention has lower cost and simple process.

本发明涉及一种可以得到TiO 2 /ZnO复合水溶胶的纺织品纳米后整理试剂及其制备工艺及对织物的整理方法，以钛酸丁酯和乙酸锌为前驱物，冰乙酸为催化剂和胶溶剂，水为溶剂，无水乙醇为钛酸丁酯的溶剂，乙醇胺为沉淀剂并提供OH -，经过水解、缩聚反应形成的TiO 2 /ZnO纳米溶胶整理剂，其组分和重量百分比含量如下：钛酸丁酯占1～15％；二水乙酸锌占1～12％；无水乙醇占1％～20％；冰乙酸占5％～15％；乙醇胺占0.1％～5％；水余量，具有耐洗性、无毒、无刺激、成本低廉、制作工艺简单可靠的优点，可实现对对织物的抗紫外、抗菌、抗静电功能整理。

Treatment of sucrose alkyl 4,6-orthoacetate hexaacetates I with water or alcohol in the presence of an acid catalyst afforded derivatives of sucrose acetates by selectively blocking specific hydroxyl group in sucrose and acetyl migration.

4，6-原乙酸蔗糖六乙酸酯在酸催化下水解和醇解，选择性地保护了蔗糖分子中的某些羟基，并通过乙酰基由C~4→C~6迁移的异构化反应合成了一系列蔗糖乙酸酯。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了