查询词典 benzene

Catalytic activities of phosphotungstic acid for liquid-phase nitrations of benzene,toluene and chlorobenzene were studied.

研究了磷钨酸对苯、甲苯和氯苯液相硝化反应的催化活性，考察了反应温度、反应时间、硝酸与芳烃摩尔比对芳烃转化率和产物选择性的影响。

Alkylations of benzene with dodecene and/or chloromethane in the room temperature ionic liquid 1-methyl-3-butylimdazole chloride-aluminium chloride as catalyst have been investigated with high conversion and selectivity.

首次研究了在氯铝酸室温离子液体系中二甲苯与苯乙烯的烷基化反应制1-苯基1-二甲苯基乙烷及其衍生物。考察了离子液体催化剂量和反应条件的不同对产物组成及副产物数量的影响。

The preparing process is described as follows:(1) the raw materials are dispersed in the solvent;(2) the solution is arranged between two electrodes;(3) alternating current with a voltage of 5 V-100V and a frequency of 10Hz-1000Hz is applied to both ends of the electrodes for 5minutes to one hour;(4) the product obtained after being washed with deionized water and pump filtrated or after centrifugal treatment is dried by being heated to 40 centigrade to 100 centigrade to get the nanometer grain, wherein the raw materials in the first step are micrometer materials or nanometer materials such as sulphide, selenide, telluride and oxide; without special requirement on shape or appearance, the materials can be in the shape of a rod, a fork, a star, a block or a sphere; the solvent in the first step can be water, ethanol, acetone, benzene or tetra chloromethane.

步骤为：1将原料分散于溶剂中；2使制成的溶液处于两电极之间；3在电极两端的加交流电，电压为5V-100V，频率为10Hz-1000Hz，时间为5min-1h；将产物用去离子水洗涤、抽滤，或进行离心处理后；4将所得到产物加热到40～100℃进行干燥，得到纳米颗粒。步骤1中原料为硫化物、硒化物、碲化物、氧化物等微米或纳米材料，其形貌不限，可以为棒状、枝状、星状、块状、球形等多种形状。步骤1中的溶剂可以为水、乙醇、丙酮、苯或四氯化碳。

Green room: Cockscomb addition to uranium and other radioactive; Aloe three of vinyl chloride, hydrogen sulfide, benzene and other organic matter, and absorb dust, bacteria; cactus absorb the infection; aspartic In addition to heavy metal particles; Chlorophytum is very suitable for on raising plants indoors and do not bother Oh!

房间养几盆绿色植物：鸡冠花除铀等放射性；芦荟除三氯乙烯、硫化氢、苯等有机物，并吸收灰尘、细菌；仙人掌吸收病菌；天门冬除重金属微粒；吊兰是非常适合室内养植且不费心的植物哦！

The product selects high quality cocoanut in the equator as carrier, goes through strict exquisite processing technology, such as high temperature carbonization, nano-compounding, bio-activation and so on. It focuses on adsorbing toxic and harmful gas molecular such as formaldehyde, benzene series, ammonia

本品精选赤道地区优质椰壳为载体，经高温炭化、纳米复合、生物活化等系列严格工艺精细加工而成，专业用于吸附分解甲醛、苯系物、氨、TVOC等有毒有害气体分子，以及各类异味、臭味的祛除，同时具有防潮、抗菌作用。

Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Jinan 250100Abstract A resonance light scattering method for the determination of critical micelle concentration of sodium dodecyl benzene sulfonate was proposed.

利用共振光散射技术在不引入探针的条件下，建立了室温下直接测定十二烷基苯磺酸钠的临界胶束浓度的方法。

Methods After collecting the benzene series in the air inlet and air outlet of the three way catalytic converser in 100% working loads, their health risk was assessed with the methods of health risk assessment.

采集分析100%负荷下三元催化器进气口和出气口中苯系物的浓度，利用健康环境风险评估方法比较催化前后苯系物健康风险的变化。

Direct oxidation of benzene to phenol, in contrast with the Hock reaction, has the merit of not only utilising nitrous oxide as an oxidising agent but also the absence of acetone as a coproduct and simpler separation processes.

直接氧化苯酚，反观与典当反应不仅具有优异的氧化剂使用笑气作为而且由于缺乏丙酮一个简单的副产品和分离工序。

Benzene,pitch coke, phenol,ocresol,m,pcresol,xylenol,coumarone resin,ammonium sulphate,pure naphthalene,quinoline,refined quinoline 98%,isoquinoline,8hydroxyquinoline,2methyl naphthalene,anthraquinone,carbazole,carbon black.

纯苯，沥青焦，苯酚，邻甲酚，间对甲酚，二甲酚，古马隆树脂，硫酸铵，精萘，喹啉，精喹啉，异喹啉，8羟基喹啉，2甲基萘，蒽醌，咔唑，炭黑。

Benzene and acetylene formation in n-heptane/air partially premixed counterflow flame was simulated using a detailed mechanism including 108 species and 572 elementary reactions.

采用详细反应机理对正庚烷部分预混对冲层流火焰中苯环与乙炔的生成进行了模拟，反应机理包括108种组分的572个基元反应。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐