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optimum condensation
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     The results showed that the optimum condensation conditions are as follows:catechol∶isobulyric aldehyde∶catalyst∶dehydrating agent is 1mol∶1.5mol∶10g∶200ml; Supported quantity of catalyst is 23.6%; reaction temperature is reflux temperature;
     其最优工艺条件是 :n(邻苯二酚 )∶n(异丁醛 )∶m(催化剂 )∶v(带水剂 )为 1mol∶1.5mol∶10 g∶2 0 0ml,催化剂的固载量为 2 3.6 % ,反应在回流温度下进行 ,反应时间约 4h ,收率可达 90 .8%。
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     The results show that the optimum condensation conditions are as follows: the molar ratio of pyridine to H_2O_2 is 1∶1.5,supported quantity of catalyst is 20%,reaction time is 2 h,reaction temperature is 80 ℃,the yield of pyridine-N-oxide can exceed 93%.
     实验证明:二氧化硅固载磷钨酸催化剂具有良好的催化活性,并且可以重复使用. 其最优工艺条件是:n吡啶∶nH2O2=1∶1.5,催化剂的固载量为20%,反应温度为80℃,反应时间为2h,收率可达93%.
短句来源
     The results showed that the optimum condensation conditions are as follows:catechol:isobulyric aldehyde:catalyst:dehydrating agent is 1mol:1.5mol:10g:200mL. Supported quantity of catalyst is 23.6%,reaction temperature is reflux temperature; reaction time is about 4h.
     其最优工艺条件是 :n(邻苯二酚 ) :n(异丁醛 ) :m(催化剂 ) :v(带水剂 )为 1mol∶1 5mol∶10g∶2 0 0mL ,催化剂的固载量为 2 3 6 % ,反应在回流温度下进行 ,反应时间约 4h ,收率可达 90 8%。
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  “optimum condensation”译为未确定词的双语例句
     This paper focuses on the cascade refrigeration cycle using the nature refrigerant CO 2,NH 3 and R290 . The properties of the refrigerants CO 2,R290 and NH 3 were introduced and analyzed, the thermodynamic analysis on this cascade refrigeration system was provided, the optimum condensation temperature of the low temperature cycle part and the optimum flow ratio were calculated.
     介绍了用于低温环境下采用自然工质 CO2 、NH3 和 R2 90 3 的复叠式制冷循环 ,介绍和分析了 CO2 、R2 90和 NH3 的物性特征 ,并且进行了复叠式制冷循环的热力学理论分析 ,通过计算得出了不同蒸发温度下的最佳低温循环的冷凝温度和最佳流量比。
短句来源
     The optimum condensation conditions are as follows the molar ratio of 25-dimethoxy-4-chloroaniline and 23-acid is 1∶1.15~1.25;
     最佳缩合反应条件如下:2,5-二甲氧基-4-氯苯胺与2,3-酸的摩尔比为1∶1.15~1.25;
短句来源
     The optimum condensation condi-tions are as follows: cinnamaldehyde ∶glycol∶catalyst∶dehydrating agent is 1mol∶1.2mol∶7.5g∶75mL. The amountof lanthanum oxide doped is 5% based on the mass of catalyst. Reaction temperature is reflux temperature, re-action time is 3h.
     其最优条件为:肉桂醛∶乙二醇∶催化剂∶带水剂为1mol∶1.2mol∶7.5g∶75mL,催化剂中氧化镧搀杂量为5%,反应在回流温度下进行,反应时间3h,收率可达92.7%。
短句来源
     The effect of ratio of D-camphol chloride and D-camphol methane to magnesium bromide diisopropylamide,temperature and time on the yield was also investigated. Results showed that the optimum condensation conditions were the ratio of 1∶1∶1.3 with the reaction time 4 h at 0 ℃,and the yield came up to 64%.
     结果表明,最佳合成条件为:D-龙脑酸酰氯和D-龙脑甲酮及二异丙氨基溴化镁的物质的量配比为1∶1∶1.3,反应时间为4 h,反应温度为0℃,收率达64%。
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     The optimum condensation conditions were determined and product yield was 80%.
     确定了最佳缩合条件. 产品产率为80%.
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     The optimum condensation conditions were determined and product yield was 80%.
     确定了最佳缩合条件. 产品产率为80%.
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     and its price is optimum.
     材料来源广泛.价格适中,容易推广使用;
短句来源
     THE COMPUTER AIDED OPTIMUM DESIGN FOR A REAL CONDENSATION PROCESS
     缩合工艺设计的计算机调优
短句来源
     optimum of quality;
     ③生产质量最佳化;
短句来源
     The Catalysts of Knoevenagel Condensation
     关于Knoevenagel反应催化剂的研究
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In this paper, the synthesis of octyl benzyl phthalate Catalyed by tertiary amine was adopted. Specialty, deals with condensation of mono octyl phthalate and benzyl chloride. The effect of condensation temperature, reation time and catalyst amount on the product yield and acid value were investigated by orthogonal test of three factors and three levels. The optimum condensation conditions were determined and product yield was 80%.

本文采用叔胺为催化剂合成邻苯二甲酸辛苄酯.重点探讨了邻苯二甲酸单辛酯与氯化苄的缩合反应过程.通过正交试验,考察了缩合温度、反应时间和催化剂用量等因素对产品产率和酸值的影响.确定了最佳缩合条件.产品产率为80%.

This paper focuses on the cascade refrigeration cycle using the nature refrigerant CO2 - NH3.The properties of the refrigerants CO2 and NH3 are introduced and analyzed, the thermodynamic analysis on this cascade refrigeration system are privided,the optimum condensation temperature of the low temperature cycle part and the optimum flow ratio are calculated. By comparing with the R13 - R22 and NH3 - NH3 cascade refrigeration cycles, the obvious advantage of the CO2-NH3 cascade refrigeration cycle,at...

This paper focuses on the cascade refrigeration cycle using the nature refrigerant CO2 - NH3.The properties of the refrigerants CO2 and NH3 are introduced and analyzed, the thermodynamic analysis on this cascade refrigeration system are privided,the optimum condensation temperature of the low temperature cycle part and the optimum flow ratio are calculated. By comparing with the R13 - R22 and NH3 - NH3 cascade refrigeration cycles, the obvious advantage of the CO2-NH3 cascade refrigeration cycle,at low temperature is demonstrated.

本文介绍了一种用于低温环境的采用自然工质CO2-NH3的复叠式制冷循环,介绍和分析了CO2和NH3的物性特征,并且进行了该复叠式制冷循环的热力学理论分析,通过计算得出了不同蒸发温度下的最佳低温循环的冷凝温度和最佳流量比。通过与R13-R22和NH3-NH3复叠式循环的比较,可以看出CO2-NH3的复叠式制冷循环在低温制冷条件下有明显优势。

2-Isopropyl 1,3 benzodioxolane was synthesized from catechol and isobutyric aldehyde using the phosphotungstic acid supported on activated carbon as catalyst.The effects of ratio of reactants,supported quantity and amount of catalyst and amount of dehydrating agent were investigated by the orthogonal test.The results showed that the optimum condensation conditions are as follows:catechol∶isobulyric aldehyde∶catalyst∶dehydrating agent is 1mol∶1.5mol∶10g∶200ml;Supported quantity of catalyst is 23.6%;reaction...

2-Isopropyl 1,3 benzodioxolane was synthesized from catechol and isobutyric aldehyde using the phosphotungstic acid supported on activated carbon as catalyst.The effects of ratio of reactants,supported quantity and amount of catalyst and amount of dehydrating agent were investigated by the orthogonal test.The results showed that the optimum condensation conditions are as follows:catechol∶isobulyric aldehyde∶catalyst∶dehydrating agent is 1mol∶1.5mol∶10g∶200ml;Supported quantity of catalyst is 23.6%;reaction temperature is reflux temperature;reaction time is about 4h.The yield can reach 90.8% under the optimum conditions and the catalyst can be used repeatedly.

以邻苯二酚和异丁醛为原料 ,活性炭固载磷钨酸为催化剂合成了杀虫剂呋喃丹的中间体2 -异丙基 - 1,3-苯并二氧五环。采用正交实验法考察了原料配比、催化剂的固载量及其用量和带水剂用量等因素对缩合收率的影响。其最优工艺条件是 :n(邻苯二酚 )∶n(异丁醛 )∶m(催化剂 )∶v(带水剂 )为 1mol∶1.5mol∶10 g∶2 0 0ml,催化剂的固载量为 2 3.6 % ,反应在回流温度下进行 ,反应时间约 4h ,收率可达 90 .8%。催化剂可重复使用。

 
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