查询词典 sulfuric

Barium sulphate is a kind of chemical substances is very stable, insoluble in water, insoluble in hydrochloric acid and sulfuric acid, melting point's 1580℃.

硫酸钡是一种化学性质非常稳定的物质，不溶于水，也不溶于盐酸和硫酸，熔点1580℃。

Room temperature ionic liquids are the hot points of the current research fields of chemistry, chemical engineering and functional materials. Since 1998, the preparation and application of ionic liquids as environmentally benign reaction media and functional material have been carried out in Lanzhou Institute of Chemical Physics. The detailed research work, including the design and preparation of novel ionic liquids, ionic liquid as catalyst and reaction medium in sulfuric acid free Beckmann rearrangement,...

离子液体介质与材料研究是当前化学化工、功能材料的热点领域之一。1998年底以来，我们以发展离子液体清洁反应介质和软功能材料为研究内容，以实现新离子液体的设计与合成，离子液体中无硫酸Beckmann重排反应、非光气异氰酸酯合成、二氧化碳吸收与活化、反应-升华分离一体化，微孔硅胶限制纳米尺度离子液体材料的设计合成和应用及离子液体-电化学技术集成等为目标开展了一系列研究工作并取得良好进展。

N-Benzylacryl amide was synthesized using acrylonitrile and benzyl alcohol as raw materials and sulfuric acid as catalyst.

以丙烯腈和苯甲醇为原料，浓硫酸作催化剂，合成了N-苄基丙烯酰胺。

As sulfuric acid , prepared from blowing furnace flue gas in the copper sulfide ore smelting, is easy to get reddish, blackish and greenish, reasons are found through analysis and detection, flame color reaction and hanging experiment in combination with the production process.

针对利用硫化铜矿冶炼吹炼炉烟气制得的硫酸易发红、发黑和发绿的情况，结合生产工艺，利用分析检测、焰色反应和挂片实验等手段，明确了原因。

Metal corrosion in sulfuric aeid edw point is a common and very serious harm go the corrosion forms, in a wide range of production in all aspects of life, especially in some specific process unit operation equipment middle.low-temperature corronsion dew point in the general industrial rurnace, boiler, fuel saving edvices, air preheater, heat exchangers, tower refrigeration systems, dust, garbage incineration furnace, sintering furnace flue and chimney acid plant and the wind tunnels of hypothermia sife, yes containing gurnace flue and chimney acid plant and wind tunnels of hypothermia site, yes containing acidic gases produced by the condensation of cold treatment from the local cold drinks along with the liquid in the device, lesding to a very serious material corrosion.

金属材料的硫酸露点腐蚀是一种常见的，危害十分严重的腐蚀形式，广泛的发生在生产生活的各个方面，尤其发生在一些特定的过程单元操作设备中间。低温露点腐蚀一般发生在在工业加热炉、锅炉、燃料节省器、空气预热器、热交换器、塔顶冷凝系统、除尘器、垃圾焚烧炉、烧结炉、烟道，烟囱及酸厂的引风管道等的低温部位，是含酸性的气体经由该产遇冷冷凝下来的冷饮液局部地随着于设备上，从而造成对材料极严重的腐蚀。

Metal corrosion in sulfuric aeid edw point is a common and very serious harm go the corrosion forms, in a wide range of production in all aspects of life, especially in some specific process unit operation equipment middle.low-temperature corronsion dew point in the general industrial rurnace, boiler, fuel saving edvices, air preheater, heat exchangers, tower refrigeration systems, dust, garbage incineration furnace, sintering furnace flue and chimney acid plant and the wind tunnels of hypothermia sife, yes containing gurnace flue and chimney acid plant and wind tunnels of hypothermia site, yes containing acidic gases produced by the condensation of cold treatment from the local cold drinks along with the liquid in the device, lesding to a very serious material corrosion.

该下载资料由本站会员上传，如果侵犯了您的权力，请通知我们，将立即删除！摘要金属材料的硫酸露点腐蚀是一种常见的，危害十分严重的腐蚀形式，广泛的发生在生产生活的各个方面，尤其发生在一些特定的过程单元操作设备中间。低温露点腐蚀一般发生在在工业加热炉、锅炉、燃料节省器、空气预热器、热交换器、塔顶冷凝系统、除尘器、垃圾焚烧炉、烧结炉、烟道，烟囱及酸厂的引风管道等的低温部位，是含酸性的气体经由该产遇冷冷凝下来的冷饮液局部地随着于设备上，从而造成对材料极严重的腐蚀。

Medium added inhibitor, could slow down the corrosion of equipment and valves, such as chrome-nickel stainless steel in sulfuric acid containing no oxygen, the great state of cremation within the range of solubility, corrosion more serious, but a small amount of copper sulfate or nitric acid and other oxidants, can change the passive stainless steel surface generates a layer of protective film to prevent the medium of etching, in hydrochloric acid, if a small amount of oxidant, which reduces the corrosion of titanium.

介质中添加缓蚀剂，可使设备和阀门的腐蚀减缓，如铬镍不锈钢在不含氧的硫酸中，很大的溶度范围内成火化态，腐蚀较严重，但加入少量硫酸铜或硝酸等氧化剂，可使不锈钢转变钝态，表面生成一层保护膜，阻止介质的的浸蚀，在盐酸中，如果加入少量氧化剂，可降低对钛的腐蚀。

A series of alkyl diphenyl ether were synthesized with low cost raw materials,diphenyl ether and aliphatic alcohol,catalyzed by concentrated sulfuric acid,and followed by sulfonation to produce MADS.On the basis of analysis and characterization,structure of the products was identified,effect factors of the preparation reactions were investigated and the optimum reaction conditions were obtained.2.The surface chemical properties of C_8,C_9,C_(10)-MADS were determined.

通过对产物的表征分析，对其结构进行了鉴定，并对合成反应的影响因素进行了分析讨论，优化了合成条件。2、测定了所合成的系列烷基二苯醚双磺酸钠C_8-MADS，C_9-MADS，C_(16-MADS的表面化学性能，结果表明：合成样品在质量分数高达10%的无机酸、无机碱及无机盐溶液中表面化学性能稳定，同时显示出优良的乳化性能和在硬水条件下较好的去污洗涤性能。3。

The oil shale ash is disintegrated into fine powder less than 150 eye to be calcined at a certain temperature, then sulfuric acid solution is added for performing acid dipping, after solid-liquid separation and solid residue removal, aluminum sulfate solution is obtained and is then filtered after sodium hydroxide solution is added in, further metallic ions as Ca2 , Mg2 , Fe3 , Fe2 and the like are filtered from the solution, thereby sodium aluminate solution is obtained, gas of carbon dioxide is communicated into the sodium aluminate solution to obtain aluminum hydroxide sediment, and after drying and calcining aluminum hydroxide powder is obtained.

将油页岩灰渣粉碎至＜150目的细粉，在一定温度下煅烧，加入硫酸溶液进行酸浸，固液分离，去除固体残渣，得硫酸铝滤液，加氢氧化钠溶液后过滤，滤除溶液中的Ca 2 、Mg 2 、Fe 3 、Fe 2 等金属离子，得偏铝酸钠溶液，向偏铝酸钠溶液通入二氧化碳气体，得到氢氧化铝沉淀，经烘干、煅烧得到氢氧化铝粉末。

The optimum condition for separating and purifying SAM was using the solution at pH of 5.0 containing 3.0 g SAM per liter at the flow velocity of 6 L/h through the ion-exchange column (φ50 mm×1500 mm)filled with D152 resin. Impurities were removed first by eluting the column with double-distilled water and acetic acid, and then with 9 L to 15 L of sulfuric acid of 50 mmol/L concentration at the flow velocity of 6 L/h.

论文对SAM的性质、药理作用以及当前国际上关于SAM的研究进展进行了较为详尽的综述，并在此基础上确立了研究内容，取得了如下成果： 1利用本实验室构建的基因工程菌JM71发酵生产S-腺苷-L-蛋氨酸，在50 L发酵罐中发酵6天后，SAM终产量达到6 g/L发酵液。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。