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middle fraction
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  “middle fraction”译为未确定词的双语例句
    Needle coke from petroleum residue- a study of the thermal behavior of the middle fraction of the residue
    石油渣油制备针状焦研究——中间馏分热反应研究
短句来源
    Study on Aromatization of FCC Gasoline Middle Fraction over Phosphor Modified Zn/HZSM-5 Catalyst
    催化裂化汽油中间馏分芳构化降烯烃研究
短句来源
    We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94% wt).
    选用焦化厂自产中间馏分作为溶剂、先用第一溶剂从粗蒽中提取蒽和咔唑中间产品,确定分离的最佳方案。 再用第二溶剂分离蒽和咔唑,找出制取精蒽(纯度高于94%)的条件。
短句来源
    The middle fraction was rich in aromatics potential content, which could be used as catalytic reforming feedstock.
    中质催化裂化汽油馏分的芳潜较高 ,可作催化重整原料
短句来源
    Results show that this method accelerates the formation of free radicals,improves the conversion of heavy oil and its model compound,and increases the yield of the middle fraction oil. ? heavy oil;
    结果表明,该方法促进了反应物中自由基的形成,提高了重质油及其模型化合物的转化率和中间馏分油的收率。
短句来源
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  middle fraction
After calcination in air the catalyst was divided into three different parts which were analyzed separately revealing the formation of FeVO4 in the top and bottom fraction of the crucible and Fe2V4O13 in the middle fraction.
      
The repeated freezing and thawing resulted in breaking of the water-fat emulsion, which caused a significant (p>amp;lt;0,001) increase of the amount of released water in the middle fraction.
      
The uppermost fraction contained mainly fat, the middle fraction water and soluble proteins, and the lowest fraction the solid material as liver and meat and also some water and fat which they hold.
      
The middle fraction was collected and stored in a polythene bottle.
      
The middle fraction was collected and stored in a stoppered polythene bottle.
      
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We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94% wt). Sintaneously the refined carbazole products with high purity (over 91%) were obtained by means of distillation and recrystal,...

We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94% wt). Sintaneously the refined carbazole products with high purity (over 91%) were obtained by means of distillation and recrystal, The method this paper describes is in practive.

选用焦化厂自产中间馏分作为溶剂、先用第一溶剂从粗蒽中提取蒽和咔唑中间产品,确定分离的最佳方案。再用第二溶剂分离蒽和咔唑,找出制取精蒽(纯度高于94%)的条件。结合蒸馏、重结晶方法提取精制咔唑产品(纯度高于91%)。本方法使用溶剂可循环,具有产品质量好、回收率高、生产成本低等特点。

This paper focused on the thermal kinetics of crude vacuum residue (VR). Liaohe and Guanshu VR thermally reacted at 400,420,440,460,480 and 500℃ for reaction times ranging from 8~150 minutes in the presence of nitrogen undes total pressure 0.5 MPa. Gas, naphtha, middle fraction, coke and VR yeilds had been determined. A simple kinetic model including five lumped species had been set up for VR thermal conversion. The model parameters had been determined by the optimization method. The model calculation...

This paper focused on the thermal kinetics of crude vacuum residue (VR). Liaohe and Guanshu VR thermally reacted at 400,420,440,460,480 and 500℃ for reaction times ranging from 8~150 minutes in the presence of nitrogen undes total pressure 0.5 MPa. Gas, naphtha, middle fraction, coke and VR yeilds had been determined. A simple kinetic model including five lumped species had been set up for VR thermal conversion. The model parameters had been determined by the optimization method. The model calculation results agree with the experimental results well.

用恒温盐浴法测试了辽河和管输减压渣油热裂解反应的转化性能,用简单的热裂解反应动力学模型对实验结果进行了关联,并求取了该模型的动力学参数。结果表明,热裂解动力学模型计算结果与实验结果能很好吻合。

The Daqing and Guanshu vacuum residues(VR) were separated into six fractions instead of customary four fractions.The six fractions of Daqing and Guanshu called saturates,light and heavy aromatics,light and heavy resins and asphltene were thermally cracked at 400,420,440 and 460℃ respectively for reaction times up to 90 min.Gas,naphtha,middle fraction,coke and VR yields were measured during conversion.A simplified kinetic model...

The Daqing and Guanshu vacuum residues(VR) were separated into six fractions instead of customary four fractions.The six fractions of Daqing and Guanshu called saturates,light and heavy aromatics,light and heavy resins and asphltene were thermally cracked at 400,420,440 and 460℃ respectively for reaction times up to 90 min.Gas,naphtha,middle fraction,coke and VR yields were measured during conversion.A simplified kinetic model consisting of five lumps was set up for thermal cracking of these fractions.The kinetic parameters of five lumps model were calculated for each fractions of Daqing and Guanshu.The model result of each fraction of Daqing and Guanshu VR fitted the experimental results well.

以大庆减压渣油和鲁宁管输减压渣油为原料,将其各自分离成饱和烃、轻芳烃、重芳烃、软胶质、硬胶质和沥青质6个族组分,以恒温盐浴的方法测试了各族组分在400~460℃下和5~90min内热裂解反应的产物分布;用简单的热裂解反应动力学模型对实验结果进行了关联,求取了热裂解反应模型的动力学参数。

 
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