查询词典 sulfur

The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92.1%。

Kinetics of photo-chlorination of acetic acid to form monochloroacetic acid ;2. The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92。

The main reason: too long, or is affected by the activities of acids, alkalis, sulfur and other chemical substances of erosion and chromotropic, and the other color ink series.

主要原因：调和时间过长，受氧化作用或受酸、碱、硫等化学物质的侵蚀而变色，与其他墨色串色。

Vanadium mainly exists as independent minerals or in clay minerals in the form of isomorphism, with a small amount absorbed by clay minerals and limonite. Nickel mainly exists as independent minerals. Molybdenum occurs as colloidal sulfides with carbon, sulfur and clay, and forms molybdenite through thermal metamorphism. Uranium is unevenly scattered in collophanite and carbonaceous_argillaceous materials in the form of isomorphism or adsorption. REE mainly occur in collophanite in the form of isomorphism. Copper, lead and zinc chiefly exist in sulfides or sulfo_arsenides and are concentrated in the metallic layer.

钒或以独立矿物存在，或以类质同象赋存在粘土矿物中；镍主要以独立矿物存在；钼主要与碳、硫、粘土一起呈钼硫化物胶状集合体，经热接触变质作用后形成辉钼矿；铀呈不均匀分散在胶磷矿和碳泥质中，呈类质同象或吸附状态存在；稀土元素主要呈类质同存在于胶磷矿中，部分呈吸附状态存在；铜、铅、锌主要以硫化物和硫砷化物等存在，多富集在金属层中。

The Jiashengpan lead-zinc-sulfur deposit, located in Langshan-Zhaertaishan mineralization belt in the western part of northern margin of North China Platform, rich in Mesoproterozoic Zhaertaishan Group, is obviously stratabound and controlled by synchronous fault. The ore bodies are mainly composed of layered, conglomeratic and disseminated ores.

甲生盘铅锌硫矿床位于华北陆块北缘西段狼山-渣尔泰山成矿带，赋存于中元古代渣尔泰山群地层中，具有明显的层控特征并受同生断裂影响，区内矿石层纹状、角砾状和浸染状构造发育。

Stone is from rock, and rock is consist of the mineral, the mineral contain iron is the source of the iron in stone products , iron element spread widely in natural world, but most of them appear to be compound, iron element is belong to medium activity metal, under high temperature is easily to be strongly acted with oxygen, sulfur, chlorine, and easily dissolve in abio-weak acid solution and strong hydrochloric acid solution, at the same time, the strong alkali solution also corrade the iron.

石材是岩石经加工后所产生的制品，岩石是由矿物组成的，其中含铁矿物是石材中铁质的来源。铁元素在自然界中分布甚广，但大多以化合物的方式出现，由于铁元素属中等活泼性的金属，在高温下易和氧、硫、氯等元素发生强烈反应，并易溶于无机稀酸和浓盐酸的溶液中，同时浓碱溶液也易侵蚀铁。

Sulfur corrodible sites and their characteristics were introduced of the prefractionation system, air preheaters of heating furnace and product air coolers etc,and chlorine corrodible sites and their characteristics were also presented of the thermocouple casing tubes, product air coolers and fire arrestors of heating furnace etc in the catalytic reforming and diesel hydrogenated unit s.

介绍了中国石油哈尔滨石化公司催化重整及柴油加氢装置在预分馏系统、加热炉空气预热器、加氢装置反应产物空冷器等处易发生硫腐蚀和在预加氢热偶套管、加氢反应产物空冷器、加热炉阻火器等处易发生氯腐蚀的部位及其表现特征，指出装置在低温(不高于120℃)、含水、容易被堵塞的部位易形成HCl-H2S-H2O腐蚀体系，分析了腐蚀原因和介质来源，总结和提出了开好原油的电脱盐、采用脱氯技术、加强对加热炉的排烟温度控制和腐蚀介质的精制与净化、加大空冷器的注水量等针对性防腐经验和措施。

FGD is only cosmically commercial desulfuration type in the world. It is dominating technology measure to control acid rain and sulfur dioxide pollution.

烟气脱硫是目前世界上唯一大规模商业化应用的脱硫方式，是火力发电厂控制酸雨和二氧化硫污染的主要技术手段。

Reagent of salt of sulfur cyanic acid once considered as the most effective chemistry to enhance reagent.

硫氰酸盐试剂曾经认为是最有效的化学增强试剂。

Ester of poisonous armour of different sulfur cyanic acid, formaldehyde and vulcanization hydrogen are decomposed to wait in soil.

在土壤中分解成有毒的异硫氰酸甲酯、甲醛和硫化氢等。

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。