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段萃取
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  stage extraction
     In the paper, process of two stage extraction distillation to separate cis - butadiene in which acetonitrile is to be used as solvent has been established and simulated by PRO/Ⅱ and HYSIM software.
     应用PRO/Ⅱ和HYSIM建立并模拟了以乙腈为溶剂的两段萃取精馏分离聚合级顺丁二烯的工艺流程。
短句来源
     Two stage extraction technology has been adopted in the furfural extraction unit at Shanghai Refinery of Gaoqiao Petrocheical Company to replace the original single step extraction.
     针对上海炼油厂润滑油糠醛精制装置塔板效率不高,精制深度和产品质量难以进一步提高的情况,将原单塔流程,改为双塔串联、溶剂分流的两段萃取新工艺。
短句来源
     By the technical reconstruction of changing lubricant processing sequence from the normal sequence to the opposite sequence,two stage extraction,furfural drying tower operating under a vacuum condition,direct transmit feeding between two units,optimize its heat exchange network,the energy consumption of the furfural refining unit decreased 23 percent from 1639MJ/t to 1261.9MJ/t in Yumen refining & petrochemical plant. The solvent unit consumption also decrease,and the process capacity increase with good economic benefit.
     玉门炼化总厂糠醛精制装置通过润滑油生产由正序改为反序、两段萃取工艺改造、糠醛干燥塔改为负压操作、装置间物料改直输、优化换热流程等措施,将装置能耗由1639MJ/t降到1261.9MJ/t,降低了23%,溶剂单耗下降,精制油收率和加工量也有所提高,取得了良好的经济效益。
短句来源
  “段萃取”译为未确定词的双语例句
     TWO-STAGE EXTRACTION TECHNOLOGY AND CALCULATION FOR LUBE-STOCK FURFURAL REFINING
     润滑油糠醛精制二段萃取工艺及计算
短句来源
     phase ratio O:A = 1:1 temperature 30-40℃ time 10 min; stages for extraction 5-6; stages for stripping 2-3. The efficiencies of extraction and stripping are over 99 %
     萃取分离的适宜工艺条件为:5709浓度0.3M,皂化度70%,反萃取剂1NH_2SO_4或6NHCl,相比O:A=1:1,温度30—40℃,时间10分钟,萃取段数为5—6段,反萃取段数2—3段,萃取和反萃取效率都能达到99%以上。
短句来源
     Improvement and Design of Extraction Equipment for Two Refining Stages of Lubricant and Furfural
     润滑油糠醛精制二段萃取装置的改造及设计
短句来源
     TWO STAGE LUBE OIL FURFURAL EXTRACTION TECHNOLOGY
     润滑油糠醛精制两段萃取工艺的工业应用
短句来源
     The quality of total alkaloids in chloroform part, ethyl actate part and n-butanolpart was 3.01g,5.15g and 119.57g respectively and the extraction rate of total alkaloids was
     14.7%,氯仿、乙酸乙酯和正丁醇各段萃取所得总生物碱依次为 3.01g,5.15g 和
短句来源
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  相似匹配句对
     The recovery ratio of U (Pu) is greater than 99. 9%, and stage efficiency of extraction section of the mixer-settler is 95%.
     萃取槽的级效率为 95 %。
短句来源
     The efficiency of extraction stage ofthe mixer-settler is 95%.
     萃取槽的级效率为95%。
短句来源
     HOP EXTRACTION
     啤酒花的萃取
短句来源
     Supercritical Extraction
     超临界萃取
短句来源
     ON SECTION WEAVE
     论组织
短句来源
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  stage extraction
Two-stage extraction preconcentration and HPLC determination of phenol and 1-naphthol in aqueous solutions
      
Samples of spruce dioxane lignin were isolated by means of six-stage extraction from spruce sawdust, their macromolecular characteristics were determined, and the hydrodynamic properties of the fractions were studied.
      
This study examined the batch, single-stage extraction of whole and defatted seeds using ethanol, methanol, acetonitrile, and acetone as the solvents.
      
A three-stage extraction procedure following the BCR protocol was used to chemically fractionate metals into "acid soluble", "reducible", "oxidizable" and "residual" fractions.
      
In addition, a three-stage extraction procedure following the European Communities Bureau of Reference (BCR) protocol was applied to study the speciation distribution of Cu among grain size fractions.
      
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In this paper the separation of uranium from thorium in IB extractor for the acid thorex process was described. The operation of IB extractor was carried out with 30% TBP-kerosene as scrubbing agent and dilute nitric acid as stripping agent at room temperature. The theoretical stages of the scrub section and strip section, the optimum conditions of the relative flow rates and acidity of the stripping agent were determined by means of batch-wise countercurrent extraction experiments. The decontamination factors...

In this paper the separation of uranium from thorium in IB extractor for the acid thorex process was described. The operation of IB extractor was carried out with 30% TBP-kerosene as scrubbing agent and dilute nitric acid as stripping agent at room temperature. The theoretical stages of the scrub section and strip section, the optimum conditions of the relative flow rates and acidity of the stripping agent were determined by means of batch-wise countercurrent extraction experiments. The decontamination factors for uranium and thorium was also determined, respectively. The separation coefficient of the uranium from thorium is more than 200, the recovery efficiency of the uranium is 99.8%.

本文研究了铀钍萃取分离条件。采用30%磷酸三丁酯(TBP)-煤油作补萃剂,稀硝酸作反萃剂,常温操作。应用串级实验,确定了1B槽的反萃段和补萃段的萃取理论级数、流比和反萃剂的酸度,同时测得了铀钍的净化系数。铀中去钍的分离系数>200,铀的收率>99.7%。

In this paper a new technology is presented for separation of Mo from U in eluate (NH4)2CO3-(NH4)2SO4 using the quaternary ammonium salt as extractant. It is developed that the extraction is carried on immediately after adding H2O2 to the eluate. The eluate is obtained by eluting the loaded resin with U and Mo using eluant(NH4)2CO3-(NH4)2SO4.The resin comes from a uranium mill .The experimental results show that the efficiency of extraction for Mo is 97.9% and the U concentration in the loaded organic phase...

In this paper a new technology is presented for separation of Mo from U in eluate (NH4)2CO3-(NH4)2SO4 using the quaternary ammonium salt as extractant. It is developed that the extraction is carried on immediately after adding H2O2 to the eluate. The eluate is obtained by eluting the loaded resin with U and Mo using eluant(NH4)2CO3-(NH4)2SO4.The resin comes from a uranium mill .The experimental results show that the efficiency of extraction for Mo is 97.9% and the U concentration in the loaded organic phase is less than 0.lg/1, when U and Mo concentrations in aqueous phase are 4-5g/l and ~2g/l respectively, the quaternary ammonium salt in organic phase is 0.15 mol/1, the amount of H2O2 is 0.8%(v/v), the stage for extraction is 1 and the O/A ratio is 1/4.

本文提出了以季铵盐为萃取剂,在加入过氧化氢的条件下,从(NH_4)_2CO_3-(NH_4)_2SO_4溶液解吸某铀水冶厂含铀、钼树脂所得的料液中分离铀、钼的新方法。结果表明,当料液中含铀4—5g/L、钼~2g/L时,季铵盐浓度为0.15mol/L,加入过氧化氢0.8%(v/v),相比(有/水)为1/4,经一段萃取,钼的萃取率可达97.9%,负载有机相中含铀小于0.1g/L。

In the light of an analysis and deduction of the economic effect in the multi-section extraction, this paper expounds an idea that there is the optimal number of sections in a flow extraction and gives a way to get the number of the sections by calculation.

本文通过对多段萃取过程的经济效益分析及推导,阐明了多段横流萃取过程存在最佳段数的观点,并试图用公式求此段数。

 
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