丙酮

Acetone is mainly used as solvent, and for production of acetone cyanohydrin, MMA and bisphenol A secondly.

丙酮主要用做溶剂，其次是生产丙酮氰醇、MMA和双酚A.2004年我国丙酮的产能为30.1万t/a，主要生产厂家有上海高桥石化、燕山石化、吉林化学工业公司和哈尔滨华宇股份有限公司。

This article describes the new process of methyl methacrylate which uses methanol,carbon monoxide and acetone as raw materials,via acetone cyanohydrin route;makes the simple economic comparison between the concept design of Chem.

描述了日本三菱瓦斯化学公司以甲醇、一氧化碳和丙酮为起始原料，经丙酮氰醇制取甲基丙烯酸甲酯的新工艺以及化学系统公司的概念设计流程与传统丙酮氰醇工艺的简单经济比较。

In 2004,the global production capacity of acetone was 5 179 kt,it was mainly used as solvent,or to produce bisphenol A and acetone cyanohydrin .

2004年全球丙酮产能为517.9万t，主要用途是作为溶剂生产双酚A和丙酮氰醇，预计2006年将出现过剩的局面；2004年我国丙酮产能为31.3万t，进口量为25.43万t，预计2007年国内需求量将达到60万~70万t，近几年生产无法满足市场需求，但未来市场不容乐观。

Acetone is mainly used as solvent, and for production of acetone cyanohydrin, MMA and bisphenol A secondly. In 2004 the capacity of acetone in China was 301kt/a. The main producers of acetone in China are Shanghai Gaoqiao Petrochemical Corporation, Beijing Yanshan Chemical Corporation, Jilin Chemical Industry Corporation and Harbin Huayu Co., Ltd.

丙酮主要用做溶剂，其次是生产丙酮氰醇、MMA和双酚A.2004年我国丙酮的产能为30.1 万t/a，主要生产厂家有上海高桥石化、燕山石化、吉林化学工业公司和哈尔滨华宇股份有限公司。

Ordinary students as the supplement control group were selected at random. 9g pyruvate calcium capsules were taken twice a day in supplement control and supplement and training group. At the same time, equipollent glucose capsules were compensated to training control group. The trail lasted for 21 days, during which athletes'training was normal.

根据体重将男子散手运动员均衡地分为两组：运动对照组(training control，简称tc组)和补充丙酮酸运动组(supplement control，简称sc组)，两组研究对象的运动等级及训练情况基本相同，每周训练20小时以上；将体院大学生作为补充丙酮酸对照组(supplement and training，简称st组)。sc组和st组每天分两次补充9克丙酮酸钙；tc组补充等量葡萄糖，实验持续21天。

Results: The good linear range of method was 10 to 1000μg/ml (T=0.9999) with the correlation coeffivient of 0.9999, and the limit concentration in air was 0.2 mg/m^3 with the average relative standard deviation less than 5%(n=6). The average sampling rate ranged from 96.6 to 100%, and the breakthrough capacity of l00mg activated charcoal was 4.7mg. The average desorption rate was 97.6%, and mesityl oxide absorped in activated charcoal tube was stable for 7 days and can be detected accurately with other gas coexisting in the air of workplace.

结果：异亚丙基丙酮浓度在10~1000μg/ml内呈良好线性关系，相关系数0.9999，最低检出浓度为0.2mg/立方公尺，相对标准偏差＜5%(n=6)；气体采样效率≥96.6%，100mg活性炭对异亚丙基丙酮的穿透容量为4.7mg，平均解吸效率97.6%；活性炭样品室温下可保存7天；丙酮、丁酮、异佛尔酮、苯、甲苯、二甲苯等共存物不干扰测定。

Unsaturated alkynyl alcohols, such as dehydronerolidol, dehydrogeranyllinalool, and dehydroisophytol, were prepared by ethynylation of turpentine derivatives, namely terpenylacetones, e. g. geranylacetone, farnesylacetone, and phyton under normal pressure in presence of alkali metal hydroxide and organic solvents.

松节油衍生物格萜烯基丙酮，如香叶基丙酮、金合欢基丙酮和植物酮在常压条件，碱金属氢氧化物和有机溶剂存在下可发生乙炔化反应，形成对应的α，β-不饱和炔醇化合物脱氢橙花叔醇、脱氢香叶基芳樟醇和脱氢异植物醇。

The invention solves the problems that the prior acetone air sensitive material can not response to acetone gas selectively due to the existence of ethanol and normal propyl alcohol, and has high minimal detection limit to the acetone.

它解决了现有丙酮气敏材料由于乙醇、正丙醇的存在无法对丙酮气体进行选择性响应，及对丙酮的最低检测限较高的问题。

objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml～400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。方法：采用固定相为二乙烯苯乙基乙烯苯型高分子多孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。结果：该方法在丙酮浓度范围在25 μg/ml～400 μg/ml内呈良好的线性关系，响应曲线相关系数为0.996，平均回收率为96.8%。结论：本法简便，快速、实用，灵敏度高，可有效地用于乙酰乙酸乙酯的质量控制。

This paper details an efficient method for a one-step transformation of the trityl ether to the acetonide. Treatment of trityl ether with a mixture of trifluoroacetic acid, 2,2-dimethoxy propane and camphorsulfonic acid as catalyst in dichloromethane through detritylation followed by acetonization gave the acetonide in high yield.

介绍了一种新的高效的由三苯甲基醚直接生成丙酮化合物的方法，也就是使三氟乙酸条件下脱三苯甲基的反应和生成丙酮化合物的反应在一个反应瓶中同时进行，使脱三苯甲基作用后生成的醇继续反应得到高产率的丙酮化合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。