查询词典 toluene

Using phenylamine and acetic acid as raw materials,cyclohexane and toluene-p-sulfonic acid as dehydration and catalyst respectively.

以苯胺和冰醋酸为原料，环己烷为脱水剂，对甲苯磺酸为催化剂，采用正交实验法，探讨了乙酰苯胺合成的适宜工艺条件。

In order to solve the problem of producing large amounts of wastes and undesired o-nitrotoluene in synthesis of p-nitrotoluene with the mixed concentrated mineral acids,the catalytic activity of phosphotungstic acid for selective nitration of toluene was studied and the optimum conditions for preparing the catalyst were investigated.

为解决硝硫混酸对硝化甲苯过程中因甲苯的非选择性硝化产生的o-MNT和大量废酸对环境的危害，研究了磷钨酸对甲苯硝化反应的催化活性。

The photoisomerization of transvitamin D3 to cisvitamin D3 was carried out with this heterogeneous photosensitizer in ethanol and toluene solutions.

利用此固相光敏剂分别在乙醇和甲苯溶液中敏化反式维生素D3。

Methods:Purchased spherical silica particles (5 μm) were refluxed in anhydrous toluene with vinyl-triethoxysilane for 18 h, to modify the surface with vinylsilyl groups.

将商品球形硅胶颗粒(粒径5μm)与乙烯基三乙氧基硅烷通过在无水甲苯中回流18 h，进行硅烷化修饰。

A new fullerene derivative containing energy-producing groups was prepared, and the reaction conditions affecting the yield were studied by the kroenecker method. The optimal reaction conditions with a 53.5% yield (based on consumed C60) are: 1:3:6 of molar ratio of C60 , o–nitrobenzaldehyde and sarcosine , 55℃ of reaction temperature, 12 h of reaction time, 40mL of toluene solvent.

利用N-甲基甘氨酸、邻-硝基苯甲醛和C60反应，合成分离出了含有硝基的新型富勒烯吡咯烷衍生物，通过正交试验对其工艺条件进行了研究，探讨了反应物剂量比、温度、时间和溶剂体积对产物产率的影响，得到了合成产物的最佳工艺条件：反应物剂量比为1：3：6、温度为55℃、反应时间为12h、溶剂甲苯体积为40mL，此时产物产率可达到53.5%（以消耗的C60计）。

The liner for double-based propellant was prepared from HTPB,toluene diisocyanate,diisooctyl sebacate,1,4-butanediol and mica.

以端羟基聚丁二烯、癸二酸二异辛酯、1，4 丁二醇、绢云母、甲苯二异氰酸酯等为原材料，制备了双基药柱用包覆层。

The results showed that intermidiate 1, 2-propanediol-sebacate of low relative molecular mass was synthesized with toluene-p-sulfoinc acid as catalyst, benzene as watercarrying agent, and of mole ratio of sebacic acid to 1, 2-propanediol of 1:4. The glass-transition temperatures of PPSC were below 0 ℃ which confirmed that PPSC would be in a high-elastic state of ambient temperature and human body temperature. PPSC was a elastomer with moderate crosslinkage, low module and high elongation, and had rapid degradation ratio (degradation degree more than 50%) in phosphate (pH value 7.4) at 37℃.

结果表明，以对甲苯磺酸为催化剂、苯为带水剂，在酸醇比为1，4的条件下可合成较低相对分子质量的中间体癸二酸聚酯二元醇；PPSC弹性体的玻璃化转变温度在0℃以下，于室温及人体温度下处于高弹态；PPSC为适度交联的、低模量高伸长的弹性体，其在37℃、pH值为7.4的磷酸盆缓冲溶液中具有较快的降解性（降解度超过50%）。

The acidity of HZSM-5 was due to the non-framework aluminum species, i.e., SiAl. The intensity of acid sites of HZSM-5 declined while the quantity of acid sites increased with dehydration temperature, with optimal intensity and quantity of acid sites and maximum toluene conversion of 28.2% at dehydration temperature of 400℃.

HZSM-5分子筛的酸性变化主要是由于非骨架铝物种SiAl的变化而引起，随着脱水温度的升高，HZSM-5分子筛酸中心的强度下降，但酸中心数量增加，当脱水温度为400℃时，HZSM-5分子筛的酸中心强度和数量达到最佳，甲苯转化率为28.2%。

Accordingly a further feature of the invention is a combined process wherein a dialkyl phenylethylmalonate is made from an alkyl phenylacetate and a dialkyl carbonate by a process comprising adding to a quantity of sodium which is covered with a hydrocarbon solvent boiling above 100°C, at least a chemically equivalent proportion of a lower aliphatic alcohol, subsequently adding an approximately equivalent proportion of a dialkyl carbonate and of an alkyl phenylacetate, heating the mixture to induce reaction and continuously distilling out the alcohol formed from the reaction zone and finally causing the sodio diethyl phenylmalonate so obtained to interact with an ethylating agent, such as ethyl halide, diethyl sulphate of ethyl p-toluene-sulphonate.

因此，本发明的另一个应用是一个组合工艺过程：二烷基苯基乙基丙二酸酯由烷基乙酸苯酯和二烷基碳酸酯得到，具体工艺过程是：向覆盖有沸点超过一百摄氏度的团庆化合物溶剂的金属钠中添加至少化学平衡的低级脂肪族醇，然后加入大约相同当量的二烷基碳酸酯和烷基乙酸苯酯，加热混合物引导反应进行，持续蒸馏把形成的醇类从反应区域移出，最后使获得的二乙基苯基丙二酸酯和乙基化试剂如卤代乙烷，二乙基硫酸酯形成乙基p-甲苯磺酸酯。

Then the condition and the catalyst of the reactions were confirmed. The characteristic analysis result of products reveals that the coatings has the advantages of the short drying time, good water resistance and high solidness .If it can be applied in practice, we can get rid of pollution of the traditional coatings which contains poisonous reagent which is composed of toluene and xylene.

本文对上述工艺中所涉及到的各步反应都作了详细的讨论，确定了反应的条件和催化剂，并对所得实验室产品进行了分析，结果发现，该涂料具有干燥时间较短，耐水性、硬度较好的特点，我们希望它能够得到实际的应用，使传统涂料摆脱工业用甲苯、二甲苯有毒试剂的污染物的困扰。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。