In this paper, 2,2-dimethylolbutyraldehyde was synthesized through the acetal reaction of formaldehyde and butyraldehyde, using silicotungstic acid as catalyst.

通過(guò)實(shí)驗(yàn)研究了硅鎢酸對(duì)此羥醛縮合反應(yīng)的催化效果，研究探討了硅鎢酸對(duì)此縮醛反應(yīng)的催化反應(yīng)活性一级做a爰片久久毛片A片美国，以及催化劑的的用量a级视频免费播放，反應(yīng)物配比，反應(yīng)時(shí)間等因素對(duì)反應(yīng)產(chǎn)品收率的影響国产片黄片A片，確定了最佳催化條件国产色色色视频网站。

The isomerization reaction of propylene oxide to produce allyl alcohol catalyzed by basic lithium phosphate was studied.

研究了環(huán)氧丙烷在堿性磷酸鋰催化作用下異構(gòu)化生成烯丙醇反應(yīng)過(guò)程，考察催化劑的制備條件一级欧美性爱网站，異構(gòu)化溫度對(duì)催化性能的影響美女一级A片免费视频在线观看，以及催化反應(yīng)機(jī)理和動(dòng)力學(xué)特性。

Quinclorac and allyl alcohol as raw materials, 3, 7-dichloro-8-quinolinoxylic acid allyl ester was obtained when catalyst is oil of vitriol or super solid acid SO〓/TiO〓. Using both catalysts, organic synthesis technology process was made respectively, and the ester was analyzed and characterized by IR spectrum and NMR spectrum Through experiment, both preparing conditions were optimized and discussed respectively.

以TiO〓為載體負(fù)載SO〓制備出固體超強(qiáng)酸催化劑狼友在线视频在线播放，確定了SO〓/TiO〓催化劑制備的技術(shù)路線日本三级片黄色，以丙酸正丁酯為探針實(shí)驗(yàn)，考察了新型固體酸催化劑SO〓/TiO〓的催化活性及制備條件對(duì)催化活性的影響日韩黄色AV网，對(duì)影響其催化效果的工藝條件進(jìn)行了優(yōu)化黄色丝袜视频网，并探討了影響的規(guī)律性。

In the absence of organic solvent and phase-transfer catalyst, the catalytic oxidation of cyclohexene to adipic acid with aqueous 30% hydrogen peroxide by weight can be efficiently catalyzed by tungstenic acid/inorganic acidic ligand.

以鎢酸／無(wú)機(jī)酸性配體為催化體系国产精品手机在线，在無(wú)有機(jī)溶劑和相轉(zhuǎn)移劑的情況下黄视网站，催化過(guò)氧化氫(質(zhì)量分?jǐn)?shù)30％)氧化環(huán)己烯合成己二酸。結(jié)果表明图片区自拍偷拍，以鎢酸／磷酸催化氧化環(huán)己烯的催化效果最優(yōu)成年人视频www。

Catalytic techniques for deep desulfurization, denitrogenation and dearomatization in production of clean gasoline and diesel fuels were reviewed, especially those for producing low-sulfur and extra-low-sulfur gasoline and diesel oil, among which technologies arousing most attention are sulfur-reducing FCC catalyst and additives, selective hydrogenation catalysts and technology, adsorptive desul-f urization of gasoline and diesel oil, biologically catalytic desulf urization of diesel oil, and selective oxid...

為面對(duì)新世紀(jì)清潔燃料生產(chǎn)的新機(jī)遇和新挑戰(zhàn)，各種生產(chǎn)清潔燃料的催化技術(shù)正在競(jìng)相開(kāi)發(fā)之中9999国产精品欧美久久久，尤其是生產(chǎn)低硫欧美孕妇与黑人孕交4p、超低硫汽油與柴油技術(shù)。其中黄色网站入口直接看，催化裂化降硫催化劑和助劑免费黄色网站有、選擇性加氫處理新催化劑及工藝、汽柴油吸附脫硫a网址在线观看、柴油生物催化脫硫和選擇性氧化脫硫等新技術(shù)尤其引人注目日本在线中文字幕播放。我國(guó)應(yīng)加快清潔燃料生產(chǎn)催化新技術(shù)的開(kāi)發(fā)研究超级超碰，為生產(chǎn)更清潔的汽油和柴油燃料提供技術(shù)儲(chǔ)備。

The results indicated that the effect that light catalysis oxidation treated leach was related to the kinds of catalyst, and the result of treatment using autanse-TiO2 is better than rutile. Catalysis capability is improved obviously after autanse-TiO2 was calcined at 600℃, and the way of calcine had large actions for catalysis.Photo-catalytic degradation of organic compound in leaches was carried out with TiO2,-Fe2O3 and ZnO,the following conclusion can be attained.

研究結(jié)果表明半導(dǎo)體光催化劑TiO2對(duì)垃圾滲濾液的光催化效果和TiO2的晶型有很大的相關(guān)性欧美人与动性行为高清视频，銳鈦型TiO2的光催化效果明顯優(yōu)于金紅石型TiO2玖玖玖玖玖无码；高溫處理銳鈦型TiO2改變其晶型和表面結(jié)構(gòu)，600℃煅燒TiO2的光催化活性有較大提高午夜中文不卡理伦片；光催化劑的活化方式亦影響光催化效果一区黄色片A级。

The technological condition of preparation of mesh TiO〓/Ti catalyst was optimized by means of XRD and SEM with the analysis of effects of dyes photoelectrocatalytic degradation. The diameter of TiO〓/Ti catalyst particle was nanometer level The effects of bias voltage and light intensity on the process of photoelectrocatalytic oxidation, the adsorption property of electrode surface, the extent of mineralization of rhodamine B and rose bengal were investigated using mesh TiO〓/Ti as catalyst of photoelectrocatalytic oxidation system.

利用拉曼光譜和XRD等測(cè)定手段并結(jié)合染料的光電催化降解效果的分析，優(yōu)化了絲網(wǎng)TiO〓／Ti催化劑制備的工藝條件亚洲欧洲日韩在线免费视频，研制出高效絲網(wǎng)納米級(jí)TiO〓／Ti催化劑亚洲国产午夜一区二区，并將該催化劑用于光電催化氧化體系，研究了氧化體系中外加偏壓国产一级乱伦黄片、光強(qiáng)等因素對(duì)光電催化氧化過(guò)程的影響以及催化劑的表面吸附性能、染料若丹明B和虎紅在光電催化氧化過(guò)程中的礦化程度亚洲玖玖色视频。

Methods:Vanadium was determined by dual-wavelength catalytic spectrophotometric method which was based on the vanadium catalyzing oxidation of acridine orange and acid chrome blue K by potassium bromate in 0.010 mol/L H2SO4 medium.

在硫酸介質(zhì)中日韩在去bbb，利用釩催化溴酸鉀氧化吖啶橙和酸性鉻藍(lán)K褪色反應(yīng)，分別在476 nm和556 nm處測(cè)量催化體系和非催化體系的吸光度的變化欧美日韩123级黄色片，用雙波長(zhǎng)催化光度法測(cè)定痕量釩韩国一级片无码。

The computational results indicate that surface catalytic combustion restrains gas phase combustion. Inlet velocity and tube diameters have important influence on catalytic combustion of hydrogen. For smaller inlet velocities,reaction is dominated by gas phase combustion. As the inlet velocity increases,there exist both surface catalytic combustion and gas phase combustion. For bigger inlet velocities,reaction is dominated by surface catalytic combustion. The temperature of flame core decreases with the decrease of tube diameter.

計(jì)算結(jié)果表明，表面催化反應(yīng)對(duì)空間氣相反應(yīng)有抑制作用亚洲第一日韩在线；入口速度和管徑對(duì)氫氣的催化燃燒過(guò)程有重要的影響国产色无码视频在线观看免费无码，在入口速度較小時(shí)，燃燒主要是空間氣相化學(xué)反應(yīng)国产主播一区二区三区四区，隨著入口速度的增大18岁以下禁止下网站黄，燃燒過(guò)程同時(shí)存在著表面催化反應(yīng)和空間氣相反應(yīng)兩種控制因素，在入口速度較大時(shí)欧美ⅹⅹ性欧美，燃燒主要是表面催化燃燒過(guò)程超碰操人妻网；隨著管徑的減小，微型管道內(nèi)反應(yīng)的最高溫度降低a级黄色大片在线观看视频。

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本發(fā)明涉及一種催化裂解制乙烯丙烯的方法久久国产黄色一级片，主要解決現(xiàn)有催化裂解制乙烯丙烯催化劑的使用溫度高，活性低超碰在线wwww，乙烯丙烯選擇性差的問(wèn)題亚洲色播爱爱爱爱爱爱爱爱，本發(fā)明通過(guò)使用在共生分子篩上負(fù)載由元素周期表VIB族元素或VIB族元素和IVB族元素組成的固體超強(qiáng)酸作為催化劑，以組份為C 4 ～C 10 的石腦油為原料公司三级片，在反應(yīng)溫度為550～700℃色哟哟亚洲一区二区三区四区，反應(yīng)壓力為0.01～0.5MPa，反應(yīng)重量空速為0.1～4小時(shí)-1 日韩va精品，水/石腦油重量比為0.5～4∶1的條件下日韩三级片欧美A片，進(jìn)行催化裂解反應(yīng)生成乙烯丙烯的技術(shù)方案先锋资原吧，較好地解決了該問(wèn)題，可用于催化裂解制乙烯丙烯的工業(yè)生產(chǎn)中亚洲图片小说电影。