• 제목/요약/키워드: liquid extraction

검색결과 1,059건 처리시간 0.031초

Ultrasonic Extraction of Phenolic Compounds from Laminaria japonica Aresch Using Ionic Liquid as Extraction Solvent

  • Han, Dandan;Zhu, Tao;Row, Kyung-Ho
    • Bulletin of the Korean Chemical Society
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    • 제32권7호
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    • pp.2212-2216
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    • 2011
  • An ionic liquid-based ultrasonic-assisted extraction method has been successfully applied to the effective extraction of phenolic compounds from Laminaria japonica Aresch. Three kinds of 1-alkyl-3-methyl-imidazolium with different cations and anions were evaluated for extraction efficiency. The results showed that both the characteristics of anions and cations have remarkable effects on the extraction efficiency. In addition, the ionic liquid-based ultrasonic-assisted extraction procedure was also optimized on some extraction parameters, such as ultrasonic power, extraction time and solid-liquid ratio. Compared with the conventional solvent, the optimum approach gained the highest extraction efficiency within the shortest extraction time. Average recoveries of phenolic compounds were from 75.5% to 88.3% at three concentration levels.

식물세포배양으로부터 Paclitaxel 분리를 위한 액-액 추출 조건의 최적화 (Optimization of liquid-liquid extraction conditions for paclitaxel separation from plant cell cultures)

  • 김진현
    • KSBB Journal
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    • 제24권2호
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    • pp.212-215
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    • 2009
  • 본 연구에서는 식물세포배양으로부터 항암물질 paclitaxel을 고 순도, 고 수율로 분리 가능한 액-액 추출 공정에서의 주요 공정 변수들을 최적화 하였다. 액-액 추출을 위한 최적의 유기용매 (methylene chloride) 첨가량, 추출횟수, 혼합시간, 정체시간은 각각 0.28 (v/v), 3 (times), 30 min, and 40 min 임을 알 수 있었다. 액-액 추출 공정은 특히 메탄올을 이용한 biomass 추출물에 포함되어 있는 다량의 극성불순물을 제거하는데 매우 효과적이었다. 또한 액-액 추출 후 농축조건으로는 후속공정에서의 높은 순도의 paclitaxel 뿐만 아니라 작업의 용이성 측면에서 액-액 추출액을 rotary evaporator로 완전히 농축하는 것이 가장 바람직함을 알 수 있었다.

식물세포배양으로부터 파클리탁셀 회수를 위한 무기염이 첨가된 액-액 추출 (Liquid-Liquid Extraction for Recovery of Paclitaxel from Plant Cell Cultures by Adding Inorganic Salts)

  • 하건수;김진현
    • Korean Chemical Engineering Research
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    • 제54권1호
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    • pp.135-139
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    • 2016
  • 본 연구에서는 무기염을 첨가한 액-액 추출에 의해 식물세포인 바이오매스로부터 파클리탁셀 회수 방법을 획기적으로 개선하고자 하였다. 다양한 무기염(NaCl, KCl, $K_2HPO_4$, $NaH_2PO_4$, $NaH_2PO_4{\cdot}2H_2O$)을 이용하여 추출효율을 조사한 결과, NaCl에서 가장 낮은 분배계수(0.053)로 가장 높은 파클리탁셀 수율(~96%)을 얻을 수 있었다. NaCl을 이용한 액-액 추출에서 최적의 NaCl/용매 비와 메틸렌 클로라이드/메탄올 비는 각각 1%(w/v)와 26%(v/v)이었다. 또한 최적의 NaCl/용매 비와 메틸렌 클로라이드/메탄올 비에서 파클리탁셀 함량에 따른 영향을 조사한 결과, 순수 파클리탁셀 함량 0.066%(w/v)에서 가장 낮은 분배계수(0.053)로 가장 높은 수율(~96%)을 얻을 수 있었다. 기존 액-액 추출의 경우 총 3회의 추출로 파클리탁셀을 95% 정도 회수 가능한 반면 무기염을 이용한 방법의 경우 단 1회 추출로 대부분의 파클리탁셀을 회수(~96%) 가능하였다.

A comparison study of extraction methods for bio-liquid via hydrothermal carbonization of food waste

  • Bang, YeJin;Choi, Minseon;Bae, Sunyoung
    • 분석과학
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    • 제31권3호
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    • pp.112-121
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    • 2018
  • The hydrothermal carbonization method has received great attention because of the conversion process from biomass. The reaction produces various products in hydrochar, bio-liquid, and gas. Even though its yield cannot be ignored in amount, it is difficult to find research papers on bio-liquid generated from the hydrothermal carbonization reaction of biomass. In particular, the heterogeneity of feedstock composition may make the characterization of bio-liquid different and difficult. In this study, bio-liquid from the hydrothermal carbonization reaction of food wastes at $230^{\circ}C$ for 4 h was investigated. Among various products, fatty acid methyl esters were analyzed using two different extraction methods: liquid-liquid extraction and column chromatography. Different elutions with various solvents enabled us to categorize the various components. The eluents and fractions obtained from two different extraction methods were analyzed by gas chromatography with a mass spectrometer (GC/MS). The composition of the bio-liquid in each fraction was characterized, and seven fatty acid methyl esters were identified using the library installed in GC/MS device.

Extraction behaviors of platinum group metals in simulated high-level liquid waste by a hydrophobic ionic liquid bearing an amino moiety

  • Wu, Hao;Kim, Seong-Yun;Takahashi, Tadayuki;Oosugi, Haruka;Ito, Tatsuya;Kanie, Kiyoshi
    • Nuclear Engineering and Technology
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    • 제53권4호
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    • pp.1218-1223
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    • 2021
  • A hydrophobic ionic liquid including an amino moiety ([DiOcAPmim][NTf2]) was synthesized. Its extraction behaviors towards Pd(II), Ru(III), Rh(III) were investigated in nitric acid aqueous solution as a function of contact time, effect of concentration of nitric acid, effect of temperature, and effect of co-existing metal ions. The extraction kinetics of Pd(II) was fairly fast and extraction equilibrium can be attained within only 5 min under the [HNO3] = 2.05 M. When [HNO3]< 1 M, the extraction percentage of Pd(II), Ru(III), Rh(III) were all above 80%. When [HNO3] reached 2 M, all of the extraction percentage decreased and in an order of Pd(II)>Ru(III)>Rh(III). When [HNO3]> 2 M, the extraction performance gradually recovered. The effect of temperature can slightly affect the extraction performance of Pd(II). Furthermore, in simulated high-level liquid waste, [DiOcAPmim][NTf2] showed a better preference towards Pd(II) under the interference of various other co-existing metal ions.

LLE and SLM studies for Pd(II) separation using a thiodiglycolamide-based ligand

  • Kumbhaj, Shweta;Prabhu, Vandana;Patwardhan, Anand V.
    • Membrane and Water Treatment
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    • 제9권6호
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    • pp.463-471
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    • 2018
  • The present paper deals with the liquid-liquid extraction and flat sheet supported liquid membrane studies of Pd(II) separation from nitric acid medium using a novel synthesized ligand, namely, N,N,N',N'-tetraethyl-2,2-thiodiethanthiodiglycolamide (TETEDGA). The effect of various diluents and stripping reagents on the extraction of Pd(II) was studied. The liquid-liquid extraction studies showed complete extraction of Pd(II) in ~ 5 min. The influence of nitric acid and TETEDGA concentration on the distribution of Pd(II) has been investigated. The increase in nitric acid concentration resulted in increase in extraction of Pd(II). Stoichiometry of the extracted species was found to be $Pd(NO_3)_2{\cdot}TETEDGA$ by slope analysis method. Extraction studies with SSCD solution showed negligible uptake of Pt, Cr, Ni, and Fe, thus showing very high selectivity and extractability of TETEDGA for Pd(II). The flat sheet supported liquid membrane studies showed quantitative transport of Pd(II), ~99%, from the feed ($3M\;HNO_3$) to the strippant (0.02 M thiourea diluted in $0.4M\;HNO_3$) using 0.01 M TETEDGA as a carrier diluted in n-dodecane. Extraction time was ~160 min. Parameters such as feed acidity, TETEDGA concentration in membrane phase, membrane porosity etc. were optimized to achieve maximum transport rate. Permeability coefficient value of $2.66{\times}10^{-3}cm/s$ was observed using TETEDGA (0.01 M) as carrier, at 3 M, $HNO_3$ feed acidity across $0.2{\mu}m$ PTFE as membrane. The membrane was found to be stable over five runs of the operation.

염산용액에서 Cyanex 272 및 혼합용매와 이온성 액체에 의한 Tb(III)의 용매추출 (Solvent Extraction of Tb(III) from Hydrochloric Acid Solution with Cyanex 272, Its Mixture and Ionic Liquid)

  • 오창근;이만승
    • 대한금속재료학회지
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    • 제56권12호
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    • pp.870-877
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    • 2018
  • Cyanex 272 shows the highest separation factor for the rare earth elements from hydrochloric acid solution among the organophosporus acidic extractants, D2EHPA and PC 88A. Solvent extraction of Tb(III) from weak hydrochloric acid solution with an initial pH 3 to 6 was compared with Cyanex 272, its mixture with Alamine 336, and ionic liquid with Aliquat 336. The solvent extraction reaction of Tb(III) using Cyanex 272 was the same as that of light rare earth elements. Synergism was observed for the extraction of Tb(III) by the mixture with Alamine 336 when the initial concentration ratio of Cyanex 272 to Alamine 336 was higher than 5. Use of the ionic liquid led to a great increase in the extraction percentage of Tb(III) from the same initial extraction conditions. While the equilibrium pH of the mixture was always lower than the initial pH, under some conditions extraction with the ionic liquid resulted in a higher equilibrium pH than the initial pH. The loading capacity of the mixture and the ionic liquid was the same and 2.6 times larger than that using Cyanex 272 alone. Ionic liquid was recommended as a suitable extractant for the extraction of Tb(III) from hydrochloric acid solution based on the ease of handling and higher extraction percentage.

해수로부터 용존 윤기물의 Solid Phase Extraction을 위한 다수 시료 처리 장치 (Multisample Extraction system for Solid Phase Extraction of Dissolved Organic Compounds from Sea Water)

  • 조기웅;정경화;신종헌;김석현;홍기훈
    • 한국해양환경ㆍ에너지학회지
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    • 제3권3호
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    • pp.34-40
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    • 2000
  • 지용성 용존 유기물을 해수로부터 효율적으로 추출할 수 있는 고체상 추출 (solid phase extraction)장치를 새로이 고안하였다. 본 장치는 octadecyl silane (ODS) cartridge와 압력 평형 마개, 96 multifolder, 아스피레타 형 진공 펌프로 구성하였다. 본 장치는 기존의 액체-액체 추출법보다 회수 효율은 1.4 배 이상 증대시켰으며, 최소 시료량을 8 배 이상 감소 시켰다. 따라서 용매의 사용을 5 배 이상 감소시킬 수가 있으므로 나중에 사용된 용매를 제거하는 노력도 크게 감소시켰다. 뿐만 아니라 96 개의 시료(각 1ℓ)를 동시에 처리할 수 있으므로 지용성 용존 유기물의 추출 과정을 반자동화시킨 획기적인 장치이다. 본 장치를 통하여 황해 해수 시료에서 추출된 용존 탄화수소의 정성 및 정량 분석 결과 본 장치가 효율성과 신뢰성에서 기존의 액체-액체 추출법을 대체할 수 있을 것으로 사료된다.

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식물세포배양으로부터 파클리탁셀 회수를 위한 초음파를 이용한 액-액 추출 (Ultrasound-Assisted Liquid-Liquid Extraction for Recovery of Paclitaxel from Plant Cell Cultures)

  • 하건수;김진현
    • Korean Chemical Engineering Research
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    • 제54권2호
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    • pp.229-233
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    • 2016
  • 본 연구에서는 식물세포배양액으로부터 파클리탁셀을 효율적으로 회수하기 위하여 초음파를 이용한 액-액 추출 공정을 개발하였다. 액-액 추출을 위한 최적의 초음파 파워와 조업 시간은 주어진 하층(메틸렌 클로라이드 층)/상층(메탄올 농축액 층) 비(25%, v/v)에서 각각 250W와 15 min임을 알 수 있었다. 최적 조건 하에서 초음파를 이용한 액-액 추출 공정의 경우 단 1 회 추출로 대부분의 파클리탁셀을 하층(메틸렌 클로라이드 층)으로부터 회수(~92%) 가능하였다. 또한 무기염 첨가에 의한 초음파 상승효과로 인하여 액-액 추출을 위하여 적절한 무기염 농도와 초음파 파워가 요구됨을 알 수 있었다.

용매추출(溶媒抽出)의 일반적(一般的) 원리(原理) (Liquid-Liquid Extraction General Principles - A Review)

  • 이진영
    • 자원리싸이클링
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    • 제18권6호
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    • pp.3-9
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    • 2009
  • 본 총설은 용매추출(또는 액-액 추출)에 대한 일반적인 원리와 추출제별 용매추출 공정의 기초 원리를 소개하고 있다. 용매추출은 서로 섞이지 않는 두 상(phase)간에 화합물이 한 상(phase)에서 다른 상으로 이동하는 현상을 이용하는 공정이다. 초기에는 분석화학 분야에서 용매추출의 간편성, 신속성 및 넓은 적용성 때문에 많이 사용되었으며, 분액깔데기와 같은 간단한 도구로 수분내에 추출실험을 완료할 수 있다는 장점이 있다.