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蒸馏残液
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  distillation residue
The use of the flory-huggins interaction parameter for the characterization of vacuum distillation residue fractions of mineral
      
The use of the Flory-Huggins interaction parameter for the characterization of vacuum distillation residue fractions of mineral
      
The distillation residue (0.43 ml/l original solvent) contains material which inhibits human serum cholinesterase (ChE) "in vitro" with a slight effect on acetylcholinesterase.
      
Cholinesterase (ChE) inhibitors have been described in the distillation residue of hexane and other industrial solvents.
      
The distillation residue from the limetreated tar was not pitch but a porous coke-like material.
      
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A synthetic route of the title compound, a new dihydrogenated derivative of lavendulol, starting with readily available isoanyl alcohol from the distillation residue in the ethanol production process with sugarhouse molasses in South China is described. Phase-tramsfer catalytic condensation of isoamyl chloride with acetone gave 6-methyl-2-heptanone in a yield of 43%, which upon methylation and dehydrochlorination led to 2, 6-dimethyl-2-heptene. Prins reaction of the alkene with paraformaldehyde in stannic chloride-dichloromethane...

A synthetic route of the title compound, a new dihydrogenated derivative of lavendulol, starting with readily available isoanyl alcohol from the distillation residue in the ethanol production process with sugarhouse molasses in South China is described. Phase-tramsfer catalytic condensation of isoamyl chloride with acetone gave 6-methyl-2-heptanone in a yield of 43%, which upon methylation and dehydrochlorination led to 2, 6-dimethyl-2-heptene. Prins reaction of the alkene with paraformaldehyde in stannic chloride-dichloromethane afforded the final product in a yield of 41.2%. Dihydro (4,5) lavandulol seems to be a mimic with nice but a little milder lavender scent.

叙述了以易得的异戊醇为原料合成熏衣草醇的一种新型二氢衍生物的方法。而异戊醇则可以从南中国的糖密发酵制造乙醇的蒸馏残液中得到。异戊基氯和丙酮的相转移催化缩合以43%的产率得到6-甲基-2-庚-酮,再经甲基化和脱氯化氢导致2,6-二甲基庚烯-2。该烯烃在氯化锡-二氯甲烷中,与多聚甲醛的Prins反应以41.2%的产率得到二氢(4,5)熏衣草醇。它似乎是有较淡熏衣草醇香气的类似物。

A patent technology about rectifying tower tray was introduced. In a traditional tray, a mass transformation between liquid and vapor that go along with heat exchange between two phases when they get into touch could never get balanced. The invention replaced the traditional style with a separated heat exchange procedure between liquid and vapor. Each tray was composed of two plates without hole. Balanced fractional condensation and balanced distillation took place on each tray: the remnant liquid of distillation...

A patent technology about rectifying tower tray was introduced. In a traditional tray, a mass transformation between liquid and vapor that go along with heat exchange between two phases when they get into touch could never get balanced. The invention replaced the traditional style with a separated heat exchange procedure between liquid and vapor. Each tray was composed of two plates without hole. Balanced fractional condensation and balanced distillation took place on each tray: the remnant liquid of distillation was sent to lower tray, the vapor of distillation was fractionally condensed; the liquid of condensation remained on the same tray and continually distilled , the remnant vapor of fractionally condensation rises up. The innovation points were: high efficiency, small tray spacing and no tiny liquid entrainment. The advantage of the new tray is its balanced rectifying processing from the view of thermodynamic, and the disadvantage the lower rate of heat transportation from the view of dynamics. The lower rate can be made up by the much longer time of heat transportation,which is the result of comparing the contact time of gas vertically passing through liquid layer on the tray and two phase horizontally flow along the tray.

介绍了一项关于精馏塔板的最新发明专利。该发明抛开目前的气液两相在直接接触的传热中进行的实际上无法达到平衡的传质方式,使气液两相的传热过程在彼此隔离的情况下进行。每层塔板由两块无板孔的薄板组成,凭借间接传热在一层塔板上完成一次平衡蒸馏和一次平衡分凝:蒸馏残液流到下一层塔板,蒸馏产生的蒸气被分凝,凝液留在本层板继续蒸馏,分凝剩余则蒸气上升。汽、液的运动靠塔内3种不同的通道实现,该发明具有如下创新点:具有板效率高、板间距小、没有雾沫夹带。全效塔板的优势在于热力学上是在平衡状态下进行精馏;不足之处就在于动力学方面传热速率慢,弥补的方法是延长传热时间:现有塔板气相垂直穿过液相显然很快,新塔板气液两相水平逆向流动接触时间由塔径决定,大为延长。

The volatile constituents of leaves from Eucalyptus dunnii,including oil fraction and water-soluble fraction,were extracted and determined.Oil fraction of volatile components was obtained through steam distillation.Ether was used as a solvent to extract the water-soluble fraction of the volatile compounds from the left liquid after steam distillation in order to know the quantity and constituents of volatile compounds dissolved in the water phase.To the oil fraction,yield of oil was 3.67%(dry weight basis),and...

The volatile constituents of leaves from Eucalyptus dunnii,including oil fraction and water-soluble fraction,were extracted and determined.Oil fraction of volatile components was obtained through steam distillation.Ether was used as a solvent to extract the water-soluble fraction of the volatile compounds from the left liquid after steam distillation in order to know the quantity and constituents of volatile compounds dissolved in the water phase.To the oil fraction,yield of oil was 3.67%(dry weight basis),and to the water-soluble fraction,it was 0.85%(dry weight basis).Both oil fraction and watersoluble fraction were analyzed by gas chromatography-mass spectrometry method.The results showed that 52 compounds that were 97.04% of the oil fraction were identified and 36 compounds that were(83.52%) of the water-soluble fraction were identified.The major constituents in oil fraction were 1,8-cineole(24.71%),followed by aromadendrene(9.10%),γ-terpinene((8.87%)),α-pinene(7.67%).Aromadendrene(19.40%) and globulol(15.67%) were found to be the major compounds in the water-soluble fraction.

采用水蒸气蒸馏法从邓恩桉叶中提取挥发油中的油相成分,用乙醚作为溶剂从蒸馏残液中萃取挥发油的水溶性物质,并利用气相色谱-质谱(GC-MS)联用分析比较二者的化学成分。邓恩桉叶挥发油油相部分的得油率为3.67%(以干重计),其中确认了52个组分,占油相部分总量的97.04%,油相部分主要成分为1,8-桉叶油素(24.71%),其次为香树烯(9.10%)、γ-松油烯(8.87%)、α-蒎烯(7.67%)等;水溶性成分的得油率为0.85%(以干重计),其中确认了36个组分,占水溶性部分总量的83.52%,香树烯(19.40%)和蓝桉醇(15.67%)是水溶部分的主要成分。

 
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