查询词典 xylene

Purified terephthalic acid, one of the main raw materials of polyester, is produced by p-xylene liquid phase oxidation.

精对苯二甲酸是聚酯工业的主要原料，目前主要采用对二甲苯空气氧化法生产。

Purified terephthalic acid, one of the most important feedstocks of polyester, is produced by p-xylene liquid phase oxidation.

精对苯二甲酸是聚酯工业的主要原料，目前主要采用对二甲苯空气液相氧化法生产。

Batch and semi-continuous oxidation of p-xylene to terephthalic acid in oxygen-enriched atmosphere with volume fraction of oxygen from 21% to 80% were investigated.

在体积分数为21%~80%的富氧空气中进行对二甲苯的间歇和半连续氧化反应，获得了富氧条件下对二甲苯氧化反应的固相中间产物(对羧基苯甲醛、对甲基苯甲酸)含量的变化规律。

For example, about 30 million tons of terephthalic acids are produced annually by oxidation of p-xylene with air.

以对二甲苯催化氧化制备对苯二甲酸为例，全球年产量超过3000万吨。

Therefore, with integrated consideration of the situations mentioned above, if the cathode reaction could be sufficiently utilized, preparation of benzaldehyde and tolualdehyde from toluene and xylene by electrooxidation with Ce /Ce as oxidative media would be more advantageous.

因此，综合考虑上述情况，若能充分利用阴极反应，选择Ce／Ce为氧化媒质，间接电氧化甲苯或二甲苯制备苯甲醛和甲基苯甲醛将更加有利。

Comparing Ce /Ce with Mn/Mn oxidative medias, we learned that:①A better results could be achieved using Ce than using Mn as oxidant to prepare benzaldehyde and tolualdehyde from toluene or xylene with the product\'s yield 10%～15% higher;②Mechanisms of the two electrooxidation reaction were different from each other.

二者的电解氧化反应机理有所不同，Ce由Ce直接电氧化得到，而Mn则是由Mn间接电氧化获得，且前者电解氧化所需的硫酸浓度仅为后者的十分之一。

Preparation of o toluic acid from o xylene over cobalt naphthenate catalyst in the presence ofair in liquid phase oxidation is presented.

对采用空气作氧化剂，环烷酸钴作催化剂，由邻二甲苯液相氧化制备邻甲基苯甲酸的反应条件，在中型半连续鼓泡床反应器上，评价了反应温度、反应压力、空气流量以及反应时间对产物邻甲基苯甲酸单程质量收率的影响。

A method of preparing o - toluic acid from o - xylene with air as oxidiaing agent, cobalt naphthenate as catalyst by liquid - phase oxidation was introduced.

介绍了采用空气作氧化剂、环烷酸钴作催化剂，由邻二甲苯液相氧化制备邻甲苯甲酸的方法。

The first step was to synthesize imidazoline. The mole ratio of oleic acid and diethylene triamine was 1:1.2, the xylene was 30%. Temperature was controlled in about 160 ℃ on this stage, timing for acylation reaction was about 1.5 hours.

第一步咪唑啉的合成：油酸和二乙烯三胺摩尔比为1：1.2，以二甲苯为携水剂，反应温度控制在160℃酰化反应1.5小时，然后升温至220℃环化反应，反应时间6.5小时。

Waste oil category: Waste oil, waste hydraulic oil, waste oil, waste oil injection, waste kerosene, waste of white mineral oil, white waste oil, waste oil sparks, the repeal of toluene, waste cutting oil, gear oil, lubricants, batteries oil, spindle oil, zorra, oil, turpentine oil, solvent oil, gear oil, oil rails; waste chemical categories: one, the repeal of toluene, xylene waste, spent 2 pure benzene, acetone waste, waste Ding ketone, cyclohexanone 3 waste, waste dichloromethane, dichloroethane waste, waste Dichloropropane 4, solvent categories: soluble oil 6 #, 120 # dissolving agents, dissolving agents 200 # 5, trichloro ethylene, dichloromethane, trichloroethane; tetrachlorethylene, trichloromethane 6, the repeal of methanol, ethanol, waste, waste alcohol, isopropyl alcohol waste 7, the repeal of ethylene glycol, diethylene glycol waste, spent three 8 glycol, waste butyl acetate, ethyl acetate wastewater, waste acetate 9, the repeal of ethyl ether, acetonitrile waste, waste petroleum ether 10, cleaning categories: cleaning agent, washing machine water, days that water; wash board water,×oil wastewater liquid 11, the supply of tires category: special supply of fuel oil, non-standard oil, burner oil, waste oil and other refined crude oil.

废油类：废机油，废液压油，废柴油，废注塑机油，废煤油，废白矿油，废白电油，废火花机油，废甲苯，废切削油，齿轮油，润滑油，废电池机油，锭子油，索拉油，松节油，溶剂油，齿轮油，导轨油等；废化工类：1、废甲苯、废二甲苯、废纯苯2、废丙酮、废丁酮、废环已酮3、废二氯甲烷、废二氯乙烷、废二氯丙烷4、溶剂类： 6#溶油剂， 120#溶油剂， 200#溶油剂5、三氯乙烯，二氯甲烷，三氯乙烷；四氯乙烯，三氯甲烷6、废甲醇、废乙醇、废丁醇、废异丙醇7、废乙二醇、废二甘醇、废三甘醇8、废醋酸丁酯、废醋酸乙酯、废醋酸甲酯9、废乙醚、废乙腈、废石油醚10、清洗类：清洗剂，洗机水，天那水；洗板水，去渍油等废液废水11、废轮胎类供应：特价供应燃料油，非标油，烧火油，废油提练的原油等。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。