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碳酸二甲酯
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  dimethyl carbonate (
     The Gibbs free energy of formation and entropy of liquid dimethyl carbonate(DMC) at 298.15K and 101.325kPa were estimated to be -472.3 kJ·mol -1 and 245.2 J·mol -1 ·K -1 respectively.
     在 2 98 .1 5 K,1 0 1 .32 5 k Pa条件下 ,液态碳酸二甲酯 ( DMC)的标准 Gibbs自由能和熵分别估算为 - 472 .3k J· mol- 1和 2 4 5 .2 J· mol- 1· K- 1。
短句来源
     the main reaction products on the catalyst are dimethyl carbonate (DMC) with a selectivity of over 85%, and less amounts of CH 2O, CO and H 2O.
     CO2 和CH3 OH在Cu Ni/ZrSiO催化剂表面上的主要反应产物为碳酸二甲酯 (选择性在 85 %以上 ) ,另有少量的CH2 O ,CO和H2 O .
短句来源
     Direct synthesis of dimethyl carbonate (DMC) by CO insertion into methanol promoted by K_2CO_3/CH_3I was studied by the isotopic tracer technique.
     采用同位素示踪技术,系统地研究了K2CO3/CH3I促进的CO2插入甲醇直接合成碳酸二甲酯(DMC)的反应机理.
短句来源
     Polymer electrolyte membranes based on vinylidenefluoride-hexafluoropropylene copolymer,LiClO_4/dimethyl carbonate(DMC)/ethylene carbonate(EC) or LiPF_6/EC/DMC/diethyl carbonate(DEC),and nanoscale SiO_2 were prepared.
     以偏氟乙烯-六氟丙烯共聚物〔P(VdF-HFP)〕、LiClO4/碳酸二甲酯(DMC)/碳酸乙烯酯(EC)或LiPF6/EC/DMC/碳酸二乙酯(DEC)和纳米SiO2为原料,用自然挥发法和相转移法制成聚合物电解质膜。
短句来源
     Direct synthesis of dimethyl carbonate(DMC)from carbon dioxide and methanol catalyzed by K_2CO_3/CH_3I in ionic liquid of 1-ethyl-3-methyl-imidazole bromine salt(Br)was studied.
     利用高压间歇反应釜,考察了K2CO3/CH3I催化CO2与甲醇直接合成碳酸二甲酯(DMC)的反应规律,得到最佳的反应条件:反应温度363K、反应压力3.6M Pa、反应时间8h、m(甲醇)∶m(CH3I)∶m(K2CO3)=12∶2.3∶1。
短句来源
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  “碳酸二甲酯(”译为未确定词的双语例句
     the mainly reaction products of the reaction of CO2 and CH3OH on Cu-Ni/VSiO catalyst are DMC (with selectivity over 85%), CH2O, CO and H2O.
     CO2 和CH3OH在Cu Ni/VSiO催化剂表面上的反应产物主要为碳酸二甲酯(DMC)、CH2O、CO和H2O ,其生成DMC的选择性在85%以上.
短句来源
     Under above conditions and calcinated temperature 823K , the conversion of DMC was about 99.9%, the selectivity of DPC was 93.4%, and the yield of DPC was 93.3% respectively by using KNO_3/MCM-48 as catalyst.
     以KNO_3/MCM-48为催化剂时,焙烧温度为823K,其他反应条件同上时,碳酸二甲酯(DMC)的转化率可达99.9%,碳酸二丙酯(DPC)的选择性为93.4%,产率为93.3%。
短句来源
     DMC Diesel oil: DMC's volume,50%,extract ratio,1∶1; irrelevant to pH and temperature.
     碳酸二甲酯(DMC)-正己烷为DMC体积50%,萃取比1∶1,pH值与温度没有影响。
短句来源
     When the reaction was carried out for 14h at n(PhOH)∶n(DMC)∶n(AlCl\-3)=4∶1∶0 06 and temperature 160-190 ℃,the total conversion of DMC was 25 5%,the selectivity for DPC was 87 5% and the yields of DPC,methylphenyl carbonate and anisole were 22 3%,2 2% and 1 0% respectively.
     在常压下 ,1 6 0~ 1 90℃时 ,当n (苯酚 )∶n (碳酸二甲酯 )∶n (AlCl3 ) =4∶1∶0 0 6 ,反应时间 1 4h ,碳酸二甲酯 (DMC)转化率为 2 5 5 % ,DPC产率 2 2 3% ,碳酸甲苯酯 (MPC)产率 2 2 % ,苯甲醚1 0 % ,DPC的选择性 87 5 %。
短句来源
     In the mixed solvent of methyl alcohol and toluene(1:3), joined 0.4mol/L sodium hydroxide,PC may be depolymerized to bisphenol A (BPA) and diethyl carbonate (DMC) and its product has high purity above 99% at 60 °C after research.
     经研究,在适量甲醇和甲苯混合溶剂中(体积比为1:3)、60℃温度、加入0.4mol/L的氢氧化钠时,PC完全解聚,最终解解产物为双酚A(BPA)和碳酸二甲酯(DMC),且其产物纯度很高,可达到99%以上。
短句来源
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  相似匹配句对
     Chemistry of Dimethyl Carbonate
     碳酸甲酯的化学
短句来源
     ELECTROCHEMICAL SYNTHESIS OF DIMETHYL CARBONATE
     碳酸甲酯的电化学合成
短句来源
     Synthesis and Application of Dimethyl Carbonate
     碳酸甲酯合成及应用
短句来源
     Production and Application of Dimethyl Carbonate
     碳酸甲酯的生产和应用
短句来源
     Usage of the Dimethyl Carbonate and the Process Technology
     碳酸甲酯的用途及工艺技术
短句来源
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  dimethyl carbonate (
Direct synthesis of dimethyl carbonate over rare earth oxide supported catalyst
      
Solid base catalysts for the direct synthesis of dimethyl carbonate (DMC) from carbon dioxide, methanol, and propylene oxide were prepared by loading KCl and K2CO3 on the surface of La2O3, Y2O3, CeO2 and Nd2O3.
      
Qualitative and Quantitative Determination of the Products Synthesized by the Transesterification of Dimethyl Carbonate with Phe
      
A gas chromatography-mass spectrometry assay method was developed for identification of the products synthesized by the transesterification of dimethyl carbonate with phenol.
      
Predication of atmospheric VLE for the ternary system Dimethyl Carbonate-Methanol-Furfural by using the Wilson equation
      
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A double-thermometer ebulliometer has been devised to determine the vapor presures of dimethl carbonate in the range from 14 to 97℃ and of 2, 3—dichloropropene from 17 to 94℃. The experimental data have been correlated with two three-Parameter equations:(1) Dimethyl Carbonate (Ia) lgP_(mmHg)=7.3089-1413.0/(228.90+t_(o_c)) (Antoine Equation), mean Per cent deviation between calculated and expe rimental values=0.25% (Ib) lgP_(KP~a)=5.7698-10012.4/T_(K)~(1.3377) mean Per cent deviation=0.26% (2) 2, 3—Dichloropropene:...

A double-thermometer ebulliometer has been devised to determine the vapor presures of dimethl carbonate in the range from 14 to 97℃ and of 2, 3—dichloropropene from 17 to 94℃. The experimental data have been correlated with two three-Parameter equations:(1) Dimethyl Carbonate (Ia) lgP_(mmHg)=7.3089-1413.0/(228.90+t_(o_c)) (Antoine Equation), mean Per cent deviation between calculated and expe rimental values=0.25% (Ib) lgP_(KP~a)=5.7698-10012.4/T_(K)~(1.3377) mean Per cent deviation=0.26% (2) 2, 3—Dichloropropene: (2a) lgP_(mmHg)=6.4468-976.42/(180.37 +t_(o_c)) (Antoine Equation), mean Per cent deviation=0.33%(2b) lge_(KP~a)=4.7783-76814.6/T_(K)~(1.7326) mean Per cent deviation=0.39%

用自行设计的双温度沸点计,测定了碳酸二甲酯在14°~97℃和2,3—二氯丙烯在17°~94℃的饱和蒸汽压。实验数据分别用两个三参数蒸汽压方程进行了关联。(1)碳酸二甲酯: (1a) lgP_((mmHg))=7.3089-1413.0/(228.90+t(℃))(Antoine Equation),计算值与实验值的平均百分偏差为0.25%; (1b) lgP_((KPa))=5.7698-10012.4/T_((K))~(1.3377)平均百分偏差为0.26%。(2) 2,3—二氯丙烯: (2a) lgP_((mmHg))=6.4468-976.42/(180.37+t(℃))(Antoine Equation),平均百分偏差为0.33%; (2b) lgP((Kpa))=4.7783-76814.6/T_((K))~(1.7326),平均百分偏差为0.39%。

Dimethyl carbonate,as a methylating agent and carbonylating agent,is an useful organic syn- thesis intermediate.In this paper,the technological conditions of the synthesis of dimethyi carbonate from propylene carbonate-methanol by transesterification reaction has been studied and the optimun ranges of the technological conditions,such as the reaction temperature,the kind and amount of catalysts and feed ratio were explored.According to the experimental results,the heat of reaction △H~0 was obtained to be—6926.2...

Dimethyl carbonate,as a methylating agent and carbonylating agent,is an useful organic syn- thesis intermediate.In this paper,the technological conditions of the synthesis of dimethyi carbonate from propylene carbonate-methanol by transesterification reaction has been studied and the optimun ranges of the technological conditions,such as the reaction temperature,the kind and amount of catalysts and feed ratio were explored.According to the experimental results,the heat of reaction △H~0 was obtained to be—6926.2 J/molp;the relationship of reaction equilibrium constant with tem- perature is: InK,=-7.075698+6926.2/RT In addition,a reaction mechanism was proposed and a kinetic equation has been set up: r=16551.8exp(-41373.5/RT)C_AC_B-19254.75exp(-28285.5/RT)C_CC_CD/C_A

碳酸二甲酯作为甲基化剂和羰基化剂是一种十分有用的有机合成中间体。本文研究了碳酸丙烯酯与甲醇反应合成碳酸二甲酯的工艺条件。优选了反应温度、催化剂种类和用量,原料配比等条件的最佳范围。根据实验结果得到此反应的反应热△H~0为-6926.2 J/mol,反应平衡常数与温度的关系为:lnK_p=-7.075698+6926.2/RT并提出了反应机理,建立了动力学方程:r=16551.8exp(-41373.5/RT)C_AC_B-19254.75exp(-28285.5/RT)C_CC_D/C_A

Synthesis process of dimethyl carbonate is reviewed. Oxidative carbonylation of methanol to DMC and the possibilities of replacement of DMS and COCl_2 by DMC are discussed.

讨论了碳酸二甲酯的合成工艺,主要介绍氧化羰基合成工艺,并对碳酸二甲酯取代硫酸二甲酯和光气市场的可能性进行了分析。

 
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