Aniline compounds are used as raw material and reacted with anthranilic acid and then phenyl iodide as alkylating agents to give alkylating products followed by cyclizing with concentrated sulphuric acid to give a N-phenyl-acridone(or 3-ethoxyl-N-phenylacridone).The structure of intermediate and target compound are determined by IR and MS.

以苯胺類化合物為原料，先后以鄰氯苯甲酸和碘苯為烷基化試劑進(jìn)行了N 烷基化反應(yīng)，再用濃硫酸使其環(huán)化制得N-苯基吖啶酮和3-乙氧基-N-苯基吖啶酮，并用紅外光譜及質(zhì)譜儀檢測了各中間體及目標(biāo)產(chǎn)物的結(jié)構(gòu)。

Potassium bromide produced in the elimination step was cleaned with steam treatment, then used to bromize tert-Butyl alcohol, producing tert-butyl bromide.

為了回收中間元素澳中文字幕黄色，用水蒸汽蒸餾方法除去脫漠化氫后生成演化鉀鹽中的雜質(zhì)，通過添加硫酸以再生漠化鉀用于敘丁醇漠化制漠代叔丁烷国产干干干日日日。

Cellulose acetate butyrate with high or low degree of butyryl substitution was synthesized in heterogeneous system(butyric acid/ acetic acid/ butyric anhydride/ sulfuric acid) using the "free solvent" method. The effect of activation time, esterification time, the molecular weight of cellulose and the content of the organic acid or anhydride on the degree of acetyl and butyryl substitution of cellulose was discussed.

在非均相體系中進(jìn)行酯化反應(yīng)国产AV色8X，采用&反應(yīng)性溶劑&，以硫酸作為催化劑合成出從高丁酯含量到低丁酯含量的纖維素醋酸丁酸酯综洲合亚洲视频，研究有機(jī)酸以及酸酐的添加量国产狼友精品免费视频一二三四区、活化時間、酯化反應(yīng)時間以及原料纖維素的分子量對酯化產(chǎn)物纖維素醋酸丁酸酯的影響人人操人人干人人做。

Experimental results show that esterification reaction proceeds effectively at 200℃ with ferric sulfate as catalyst.

論文研究選用硫酸鐵作酯化反應(yīng)的催化劑欧美一级久久，在醇酸摩爾比10：1.0，酯化溫度200℃欧美日韩国产在线mv，酯化時間2小時www.taohongbei.com。

The results show that the optimal parameters of esterification are as follows: 4% of SO42-/ZrO2, molar ratio of methanol to litsea cubeba kernel oil 101, 68 ℃ of reaction temperature and 4 h of reaction time, the acid value decreases to 2.52 mg/g. Compared with the traditional acidic-catalyzed method, this method has the advantages of no acid proof equipment, easy to recycle catalyst and no acidic waste water emission. The optimal parameters of transesterification are as follows: 25 ℃ of reaction temperature, 0.5% of hexadecyl-trimethyl-ammonium bromide, 1% of NaOH, molar ratio of methanol to the oil 61 and 15 min of reaction time. The ester exchanging rate is 97.6%. This method adopts phase transfer catalyst and produces industry prospect, which has many advantages such as energy-saving and time-saving under room temperature.

研究結(jié)果表明，固體酸SO42-/ZrO2催化酯化反應(yīng)的最佳條件為：油重4%的SO42-/ZrO2亚洲二三区，醇油摩爾比為101一级A片一级毛片一级人6，溫度為68 ℃，反應(yīng)時間為4 h谁有黄色网站久久久，原油酸值降到2.52 mg/g日韩主播欧美精品视频；該法相對濃硫酸催化酯化法具有不需耐酸設(shè)備、催化劑易回收国产小视频网址、無廢水排放等優(yōu)點(diǎn)欧美偷操；相轉(zhuǎn)移催化酯交換反應(yīng)的最佳條件為：溫度為 25 ℃，0.5%的十六烷基三甲基溴化銨AV网在线www观看，油重1%的NaOH欧美福利二区，醇油摩爾比為61，反應(yīng)15 min免费看色网站，原油酯交換率達(dá)到97.6%人人看人人摸人人干；采用相轉(zhuǎn)移催化技術(shù)，反應(yīng)在常溫下進(jìn)行欧美日韩xxxx，大大減少了能耗韩国三级免费在线观看，縮短了反應(yīng)時間，具有的產(chǎn)業(yè)化前景永久看日韩免费一级黄色视频。

After coupling diazotized p-chloroaniline with imidazole, the resulting monoazo dye is quaternized with dimethyl sulfate. Upon dimethylamination, the ...

對-氯苯胺重氮化后国产一级黄色操逼片，與咪唑偶合，生成單偶氮染料，與硫酸二甲酯季銨化无码中文字幕A片在线，所得季銨化合物再經(jīng)二甲胺基化即為題示染料亚洲人妻中文。

In this thesis,MWNTs were modified firstly using concentrated acid of H_2SO_4 and HNO_3,and then octadecyl isocyanate was grafted onto the surface of the MWNTs to improve the dispersion and the interaction between the filler and the matrix.

第一步亚洲超清黄色视频在线观看，用濃硫酸和濃硝酸的混合液對MWNTs進(jìn)行酸化處理老夫妻性交免费视频，第二步，用廉價的十八烷基異氰酸酯對酸化過的MWNTs進(jìn)行烷基化處理www.zmjzk.com。

Passivation process also has some drawbacks, including hard buck coke catalyst bed treatment国内揄拍国内孞精品人妻浪潮AV、polythionic acid stress corrosion cracking prevent for sensitively materials, meanwhile passivation process must be coordination between skillful local workers with knowledgeable company.

鈍化法也有一些潛在的缺點(diǎn)必須注意，同時也是需要廠商負(fù)責(zé)保證美叉人人人一,级黄片，主要包括大塊結(jié)焦廢觸媒的處理影音先锋av下载、鈍化劑化學(xué)成分是否會對設(shè)備材質(zhì)造成潛在傷害的確認(rèn)及設(shè)備因敏化而產(chǎn)生聚硫酸應(yīng)力腐蝕的預(yù)防等。

A series of sulphonated SBS were achieved by reacting SBS blockcopolymer with sulphuric acid, meanwhile, the blends of PVC andsulphonated SBS were studied. By means of strength capabilityexamination and DSC analysis, it was found the miscibility wasincreased after SBS was sulphonated.2 The chemical grafting of styrene and PVC membrane2.1 The reaction condition of graftingBy means of the swelling and seepage of Styrene to PVC film,St was grafted onto PVC film by the initiation of BPO .

采用硫酸對熱塑性彈性體SBS進(jìn)行磺化直接免费观看的黄色网站，得到不同磺化度的產(chǎn)物涩涩毛片在线视频看看，并對其與PVC的物理共混進(jìn)行了研究；通過力學(xué)性能及DSC測試欧洲黄视频在线观看，發(fā)現(xiàn)SBS磺化后增加了與PVC的相容性(來源：Af2a2a2BC論文網(wǎng)www.abclunwen.com)色妞网视频二区视频。2 苯乙烯與聚氯乙烯膜的化學(xué)接枝2.1 苯乙烯與聚氯乙烯膜接枝條件利用苯乙烯對PVC的溶脹滲透，在過氧化苯甲酚的引發(fā)下發(fā)生接枝共聚反應(yīng)中文字幕精品亚洲一区。

The existence of titanium dioxide and titanyl sulfate reduces the corrosion of zinc deposits.

結(jié)果發(fā)現(xiàn)：鈦的加入能明顯提高鈍化膜的耐蝕性日韩亚洲欧美精品一二区，這是由于鈍化膜中形成二氧化鈦和硫酸氧鈦，它們摻雜在鈍化膜及其腐蝕產(chǎn)物中欧美日韩在线a视频在线观看，有效抑制了鋅鍍層的腐蝕九九热频道这里只有精品99。