查询词典 dimethyl ether

By means of GC, GC-MS, GC-IR, IR, H1-NMR,the reaction products were investigated and the results showed that there are camphene, limoneneN terpinolene, Me a -fenchyl ether, Me -terpinyl ether, Me bornyl ether and Me isobornyl ether containing in the products,and the content of the main product Me a -terpinyl ether is up to 42.5%,the selectivity is 44.7%.

采用GC、GC-IR、GC-MS、IR、H~1-NMR等对反应产物进行定量和定性分析，结果表明：微波辐射下α-蒎烯与甲醇的反应产物含有莰烯、柠檬烯、α-小茴香甲醚、异松油烯、异菠基甲醚、菠基甲醚、α-松油基甲醚等，在较好的工艺条件下，主产物α-松油基甲醚的得率为42.5％，选择性为44.7％。

The method is realized by that polyether ether ketone is added into concentrated sulfuric acid to carry out sulfonation reaction, thereby obtaining sulfonated polyether ether ketone, then the sulfonated polyether ether ketone is dissolved in organic solvent, N, N (1)-Carbonyldiimidazole is added to stir for one to three hours, coupling agent is mixed for stirring the reaction for 1.5 to 4 hours, then inorganic crosslinking agent is mixed to react under the temperature of 50 to 80 DEG C. Proton conductors are mixed to continue getting the mixed solution of the sulfonated polyether ether ketone or the inorganic crosslinking agent or proton conductors under the temperature. Finally the proton exchange membrane for a direct methanol fuel cell is obtained by that the mixed solution of the sulfonated polyether ether ketone or the inorganic crosslinking agent or proton conductors is/are processed through membrane forming, drying and exuviation.

该方法首先将聚醚醚酮加入浓硫酸中进行磺化反应得到磺化聚醚醚酮；然后将磺化聚醚醚酮溶于有机溶剂中，加入N，N′-羰基二咪唑搅拌1～3小时后加入偶联剂搅拌反应1.5～4小时，再加入无机交联剂在50～80℃下反应，然后加入质子导体继续在此温度下反应得到磺化聚醚醚酮/无机交联剂/质子导体的混合溶液；最后将磺化聚醚醚酮/无机交联剂/质子导体的混合物溶液成膜，干燥，脱膜即得到所述的直接甲醇燃料电池用质子交换膜。

The preparation of avermyctin emulsions in water was achieved by mixing the surfactants polyoxyethylene (10) octylphenyl ether (OP10), polyoxyethylene styrenated phenol ether (602), and polyoxyethylene (40) castor oil ether (EL-40) with polyoxyethylene (20) castor oil ether (EL-20), separatively. Emulsion stability was investigated by analyzing the hydrophile-lipophile balance, critical micelle concentration, and surface tension. Then, the surfactants of polyoxyethylene polyoxypropylene styrenated phenol ether (1601), block copolymer (L64), and octyl phenyl polyoxyethylene phosphonate were added to the emulsion made by blending EL-40 and EL-20, separatively. The stability of the emulsions was investigated further and discussed in terms of droplet size, surface tension, and zeta potential.

首先将辛基酚聚氧乙烯醚(OP10)、苯乙烯基酚聚氧乙烯醚(602)和蓖麻油聚氧乙烯(40)醚(EL-40)分别与蓖麻油聚氧乙烯(20)醚(EL-20)复配制备阿维菌素水乳剂，从亲水亲油平衡值、临界胶束浓度、表面张力等方面分析了二元表面活性剂复配对乳液稳定性的影响；其次，在EL-40与EL-20复配基础上，将苯乙烯基酚聚氧乙烯聚氧丙烯醚(1601)，嵌段共聚物(L64)和辛基酚聚氧乙烯醚磷酸酯分别添加到乳液中，从粒径、表面张力和zeta电势等方面考察三元表面活性剂复配对乳液稳定性的影响。

BHT is used as ether stablizer in chemical reagent diethyl ether、 industrial ether、 anesthetic ether, has more obvious steady effect than others, and doesn't influence ether's other quality index.

用bht作为乙醚稳定剂，应用于试剂乙醚、业乙醚、麻醉乙醚等均有比一般乙醚稳定剂更显著的稳定效果，而且基本上不影响乙醚产品的其它质量指标。

Is a high-tech private enterprise, located in Laohekou City, Hubei Province, the main products are: 3,4 - dichloro-nitrobenzene; 3,4 - dichloroaniline; 2,4 - dimethyl-nitramine p; 2,4 - dimethylaniline; 2,6 - dimethyl-nitrobenzene; 2,6 - dimethylaniline; 3,5 - dimethyl-nitrobenzene; 3,5 - dimethyl Aniline; acrolein; Glutaraldehyde and other fine chemical products.

老河口联谊化工有限公司为一家高科技民营企业，位于湖北省老河口市，主要产品有：3，4-二氯硝基苯；3，4-二氯苯胺；2，4-二甲基硝基苯；2，4-二甲基苯胺；2，6-二甲基硝基苯；2，6-二甲基苯胺；3，5-二甲基硝基苯；3，5-二甲基苯胺；丙烯醛；戊二醛等精细化工产品。

Main products include: 1,3-dimethyl-2-imidazolone, also named dimethyl-ethenylurea, 1,3-Dimethyl-2-imidazolone、1,3- Dimethyl-3,4,5,6- four hydrogen-2-pyrimidone, 2-imid-azolidinone、methane acid amine,、pyridylmethanol、pyridylaldehyde、50% methane acid,etc series products.

公司主营：1，3-二甲基-2-咪唑啉酮，又称二甲基乙烯脲，1，3-Dimethyl-2-imidazolinone、1，3-二甲基-3，4，5，6-四氢-2-嘧啶酮、 2-咪唑啉酮、甲酸胺、吡啶甲醇、吡啶甲醛、50%甲酸等系列产品。

Main products include: 3-Dimethyl-2-imidazolidinone, also named dimethyl-ethenylurea, 3-Dimethyl-2-imidazolidinone、1,3- Dimethyl-3,4,5,6- four hydrogen-2-pyrimidone, 2-imid-azolidinone、methane acid amine,、pyridylmethanol、pyridylaldehyde、50% methane acid,etc series products.

公司主营：1，3-二甲基-2-咪唑啉酮，又称二甲基乙烯脲， 1， 3-Dimethyl-2-imidazolidinone、1，3-二甲基-3，4，5，6-四氢-2-嘧啶酮、 2-咪唑啉酮、甲酸胺、吡啶甲醇、吡啶甲醛、50%甲酸等系列产品。

From the point view of product distribution, conversion of dimethyl ether and energy consumption, with RCD plasma DME conversion was higher and was hardly affected by the residence time of dimethyl ether, and hydrogen, carbon monoxide and unsaturated hydrocarbons with RCD plasma were more than those with DBD plasma.There was no liquid product with RCD plasma, but the liquid product obtained with DBD plasma consisted of aldehydes, alcohols and methoxy-containing organic compounds, for instance, formaldehyde, methyl alcohol, dimethoxy ethane and so on.Moreover, most compositions of liquid product were methoxy-containing compounds, and the liquid product selectivity was as high as 32.23%.However, energy consumption for the reaction with DBD plasma was more than that with RCD plasma.

从产物分布、转化率及能耗上看，利用RCD所获得的二甲醚的转化率高，几乎不受二甲醚停留时间的影响，且氢气、一氧化碳和不饱和烃的含量大，几乎没有液相产物，而利用DBD能获得较多的液相产物，包括一些醇、醛和含有甲氧基的有机化合物，如甲醛、甲醇和二甲氧基乙烷，且大部分组成都是含有甲氧基的化合物，液相产物的选择性高达32.23％，但是能耗较大。

From the experiment discovered for the first time the dimethyl ether may substitute CO to take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and optimized the CH_3OCH_3-NO-HO_2 chemistry amplifying system determination condition, the CH_3OCH_3 best density is 1.876 ppmv, the NO best density is 1.3ppmv, and obtained this method chain length CL=124, 5 parallel determinations densities of HO_2 are the 44.0pptv, the relatively standard deviation is smaller than 4%; Although chemistry box model computed result indicated the dimethyl ether, the ethene, the propene and the ethanol all can take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and their simulation chain length all grows up compared to the CO-NO-HO_2 chemistry amplifying systems, but experiments proved the ethene, the propene and the ethanol have not suit the chain-carrying agents.

首次从实验上发现二甲醚可以替代CO作为过氧自由基化学放大系统的链传递试剂，并优化了CH_3OCH_3-NO-HO_2化学放大系统的测定条件，CH_3OCH_3的最佳浓度是1876ppmv，NO的最佳浓度为1.3ppmv，并得到了这一方法的链反应长度(CL=124)，5次平行测定浓度为44.0pptv的HO_2自由基，相对标准偏差＜4％；虽然化学盒子模式计算结果表明二甲醚、乙烯、丙烯和乙醇都能作为过氧自由基化学放大系统的链传递试剂，并且它们的模拟链长都比CO-NO-HO_2化学放大体系的链长大，但是实验证明乙烯、丙烯和乙醇不适合作为过氧自由基化学放大系统的链传递试剂。

Two dimension mathematical model of the tube reactor for dimethyl ether synthesis from methanol was established The temperature and concentration profiles in axial and radial direction for this tube reactor with change of operating condition were obtained with finite difference method,so as to provide design data for developing largescale plant of synthesizing dimethyl ether from methano

通过对甲醇气相脱水制二甲醚反应特点的研究，提出了使用拟等温管式反应器的概念；并用二维数学模型进行了数学模拟；在该模型上进行了操作条件对催化床温度分布影响的模拟研究，从而提出了该反应器的结构尺寸，为甲醇气相脱水制二甲醚的大型化开发提供了设计依据。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？