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减压蒸馏     
相关语句
  vacuum distillation
     the condition is 15 min in 85 ℃ with the vacuum distillation deodorization.
     85℃下减压蒸馏脱臭15 min。
短句来源
     A STUDY ON THE CORRELATION BETWEEN CHROMATOGRAPY SIMULATED DISTILLATION ASTM D2887AND VACUUM DISTILLATION ASTM D1160
     色谱法模拟蒸馏ASTM D2887与减压蒸馏ASTM D1160数据关联的研究
短句来源
     Construction Technique of Decompression Furnace at 500×104 t/a Atmospheric and Vacuum Distillation Equipment
     500万t/a常减压蒸馏装置减压炉施工技术
短句来源
     Diethanolamine was added to formalin at 35 ℃,and the mixture was warmed to 40~45 ℃ for 2 h. Whereafter,the water in the mixture was evaporated with vacuum distillation at 80~82 ℃ under 0.094MPa to obtain intermediate,3-(2-hydroxyethyl)-1,3-oxazole(HENH).
     在35℃左右将二乙醇胺滴入37%~40%的甲醛水溶液中,加毕,于40~45℃继续保温反应2 h,然后于80~82℃,小于0.094 MPa,减压蒸馏直到没有馏分为止,得到中间体3-(2-羟基乙基)-1,3-氧氮杂环戊烷(HENH).
短句来源
     On these conditions, pressure is 4.0~6.5kPa, temperature is 160~170℃,the high purity native nicotine is taken by the vacuum distillation, the purity of the product is above 98%, the yield is above 68.7%.
     再在压力为40~65kPa,温度为160~170℃条件下,减压蒸馏获得天然烟碱,产品含量可达98%以上,收率达687%。
短句来源
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  reduced pressure distillation
     In the first step, stearyl chloride is made by stearic acid and thionyl chloride , n(stearic)∶n(thionyl chloride)=1∶1.5 ,at the reaction temperature 80℃and the reaction time of 6 hours. Stearyl chloride is gotten by collecting the fraction from 170℃ to 200℃in the reduced pressure distillation.
     以硬脂酸和亚硫酰氯为原料 ,n(硬脂酸 )∶n(亚硫酰氯 ) =1∶1 .5 ,在 80℃下冷凝回流 6h酰氯化反应合成硬脂酰氯 ,硬脂酰氯经减压蒸馏收集 1 70~2 0 0℃的馏分得到。
短句来源
     It is reveal by GC analysis that the purity of the TMP ,treated by reduced pressure distillation and recrystallization in acetic ester ,approximates to that of the reagent grade TMP .
     GC分析结果表明:采用减压蒸馏及乙酸乙酯重结晶并用的方法精制的TMP纯度接近于试剂级TMP。
短句来源
     The advantage and disadvantage of the five recycling methods, direct heating, direct aqueous vapor, indirect aqueous vapor, reduced pressure distillation, precipitation method, is discussed.
     探讨了直接加热法、直接水蒸汽法、间接水蒸汽法、减压蒸馏、酒精沉淀等五种回收方法的优缺点。
短句来源
     This paper dicusses recrystallization ,reduced pressure distillation,cleaning and some other purification methods for seven kinds of industrial grade Trimethylolpropane (TMP)with impurities .
     采用重结晶、减压蒸馏、洗涤等方法对含七种杂质的三羟甲基丙烷(TMP)工业品进行了精制。
短句来源
     The reduced pressure distillation experiment on the liquid paraffin was done and the Engler distillation curve was obtained.
     进行了石蜡油的减压蒸馏实验,得到了恩氏蒸馏曲线。
短句来源
更多       
  decompression distillation
     The optimum conditions were below :diethylenetriamine:1,2-epoxypropane:sulfuric acid:water = 1∶0.6∶1∶4.5(mol proportion),reaction temperature is 30~35℃ and rection time is 6 hours,then neutralized,filtrated,distilled,[bis(2-aminothyl) amino]-2-propanol was finally obtained through decompression distillation under 160~164 ℃/1.3 kPa.
     二乙烯三胺与环氧丙烷、硫酸、水的摩尔比为1∶0.6∶1∶4.5,在30~35℃反应6 h,反应混合物经过中和、过滤、常压蒸馏得到粗产物,然后减压蒸馏,收集160~164℃/1.3 kPa馏分20~30g,收率为36%~54%。
短句来源
     Piping Design for Decompression Distillation System
     减压蒸馏系统管道设计
短句来源
     The method of segment decompression distillation was applied to separate the product and excessive methanol(MeOH) and ethylene diamine(EDA). Under the lower vacuum conditions(0.06MPa),98.1% of the recovery for both MeOH and EDA was achieved.
     应用分段减压蒸馏方法使产物与溶剂甲醇(MeOH)和过量试剂乙二胺(EDA)分离,在较低真空条件下(0.06MPa),MeOH和EDA的回收率高达98.1%.
短句来源
     In the reaction,sodium methoxide acts as catalyst,the ratio of glyceryl triacetate,glycerin tripropionate and methly stearate is 11∶1∶1,2.5 h of decompression distillation,temperature 82~84℃,the product of this reaction triacylglycerol is smectic solid at normal atmospheric temperature.
     通过研究得知 ,将三乙酸甘油酯和三丙酸甘油酯与硬脂酸甲酯按 11∶1∶1的比例在甲醇钠的催化下 ,82~ 84℃减压蒸馏下反应 2 .5h ,可制得常温下为脂状固态的三酰甘油酯。
短句来源
     Using calcium as catalyst, DMAE and MMA as feeds, react under normal pressure, then seprate through decompression distillation, and ester exchange to synthesize DMAEMA.
     采用金属钙 (Ca)作为催化剂 ,以N ,N 二甲氨基乙醇 (DMAE)和甲基丙烯酸甲酯 (MMA)为原料 ,常压下反应及减压蒸馏分离 ,用酯交换方法合成甲基丙烯酸二甲氨基乙酯 (DMAE MA) .
短句来源
更多       
  decompressed distillation
     At first, according to the characteristics of the physical properties of the component involved, cooling suction screening method is adopted to pass over the concerned steps of decompressed distillation and extraction, which reduces the quantity of the water added to half, and recycle the raw material unreacted in the reacting mixed-liquid.
     首先根据反应物系中有关组分的物性特点,采用冷却抽滤法省去了原工艺中的减压蒸馏和有关萃取工序,使工艺过程中的加水量减少了1/2,并使反应混合液中未反应的原料能得回收利用。
短句来源
     Decompressed distillation was executed by recovered for 1-6 times mother-liquid as input material, the content of components was determined quantitatively. It could make us to understand the economic significance of micro-reactors being reclyed in synthesizing nano-particles.
     以1-6次循环回收母液为原料,进行减压蒸馏,定量测定回收液中各组分的含量,以了解微反应器循环利用在纳米微粒的合成上的经济意义。
短句来源
     3. The parameters of wet saponification for Samara oil were optimized by orthogonal experiment: the sample was saponified in boiled water for 1 hour in alkali hydrolyze conditions, then crude phytosterol was extracted as the proporation 3:1, dissolved in ethanol to saturate state under heat, then decompressed distillation on circumrotate evaporation instrument and crystallize out the content of phytosterol is 19.5%.
     3 通过正交试验,优化了湿法皂化提取植物甾醇的工艺组合:即在碱水解条件下在沸水浴中皂化1小时,然后按照萃取剂与皂化液比例3:1进行萃取。 萃取后的粗甾醇(不皂化物)用乙醇做溶剂在加热状态下全部溶解并处于过饱和状态,在旋转蒸发器上减压蒸馏,进行结晶。
短句来源
     Through addition, acidification, closed ring and finally decompressed distillation, hydroxyl propane was made used propenol as initial material.
     结果 ,以丙烯醇为起始原料 ,经加成、酸化、闭环反应 ,最后经减压蒸馏 ,成功制得了羟基丙烷磺酸内酯。
短句来源

 

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  vacuum distillation
The obtained broth was further condensed by vacuum distillation, and then alcohol was added.
      
A technology and apparatus for obtaining high-purity sodium by high-vacuum distillation were developed.
      
Production of High-Purity Potassium by Vacuum Distillation with Dephlegmation
      
A procedure was developed for evaluating the efficiency of substance purification by vacuum distillation with vapor dephlegmation in a heated condenser.
      
These substances do not evolve dimethylamine even under the conditions of vacuum distillation (145-150°C, 1 mm Hg).
      
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