아민 추출제에 의한 유기산의 반응추출 Ⅱ - Lewis Stirred Cell 추출기를 이용한 반응추출제에 의한 유기산의 물질이동 -

류운형,이한섭,유철휘,김용렬,강안수 ( Oon Hyung Ryu,Han Seob Lee,Chul Hwi Yoo,Yong Yeul Kim,An Soo Kang ) 한국공업화학회 1995 공업화학 Vol.6 No.6

Lewis식 교반추출장치에서 물질전달계수에 미치는 교반속도의 영향 및 무차원군의 관계를 구명하였다. Lewis식 교반추출장치에서 교반속도가 커질수록 유기산의 수용액측 물질전달계수는 증가하였고 추출도 또한 증가하였다. 그리고 0.05M 메타아크릴산을 Trioctylamine으로 추출하는 경우에 최적조건은 교반속도 200rpm, 추출시간 50분이었으며, 이때 물질전달계수는 5.52×10^(-5)m/s이었다. 또한 추출속도에 대한 무차원 상관관계를 얻었으며 그 결과는 본 실험에 사용한 유기산 중에서 아크릴산의 경우 Sh=(Re·Sc)^(0.97), 메타아크릴산의 경우 Sh=(Re·Sc)^(0.68)에 각각 비례하였다. 이때 이들의 상관식은 15% 이내의 오차 범위에서 일치하였다. The mass transfer coefficient of organic acid in aqueous phase and the degree of extraction were increased with increasing agitation speed in Lewis stirred cell extraction unit. The optimum conditions of agitation speed and the extraction time were 200rpm and 50min respectively for the case of 0.05M methacrylic acid extraction with trioctylamine, and in these conditions, the mass transfer coefficient was 5.52×10^(-5)m/s. Correlations of dimensionless group for extraction rate were obtained, such that Sh is proportional to (Re·Sc)^(0.97) in acrylic acid, and Sh is proportional to (Re·Sc)^(0.68) in methacrylic acid. Also, calculated values by using these correlation eqations were consistent within 15% error range with experimental ones.

아민 추출제에 의한 유기산의 반응추출 (Ⅰ) ( 유기산의 반응추출시 추출도에 미치는 추출제 및 용매의 영향에 관한 연구 )

류운형,이한섭,유철휘,김용렬,강안수 ( Oon Hyung Ryu,Han Seob Lee,Chul Hwi Yoo,Yong Yeul Kim,An Soo Kang ) 한국공업화학회 1996 공업화학 Vol.7 No.1

평형 추출장치를 사용하여 유기산의 물리추출과 반응추출에서 추출도에 미치는 추출제의 종류와 농도, 용매의 영향을 조사하였다. 사용된 유기산은 아크릴산과 메타크릴산이었고, 추출제로는 n-octylamine(OA)과 di-n-octylamine(DOA), tri-n-octylamine(TOA) 및 tri-octylmetyl ammonium chloride(TOMAC; Aliquat 336)을 사용하였다. 실험결과 반응추출에서 추출도는 물리추출의 경우보다 2∼9배 정도 증가 되었으며, 유기산의 추출도에 미치는 추출제의 영향은 OA, TOMAC, DOA 및 TOA의 순서로 추출도가 증가하였으며, 또한 추출제의 농도가 증가할수록 추출도가 증가하였다. 용매의 영향은 종래의 용매의 유전상수보다는 용해도인자에 의한 용매선택 방법이 신뢰성이 있었고, 용질과 용매의 용해도인자의 차이가 작을수록 추출도가 증가하여 케로진, 크실렌, 클로로포롬, MIBK 및 n-BAc의 순서로 좋아졌다. In physical and reactive extraction system using equilibrium extraction equipment, the effects of extractants, concentration of extractant, and solvent on the degree of extraction were investigated. The organic acids used were acrylic acid and metacrylic acid. Extractants were n-octylamine(OA), di-n-octylamine(DOA), tri-n-octylamine(TOA) and tri-octylmetyl ammonium chloride(TOMAC; Aliquat 336). We found that the degree of extraction for reactive extraction was 2∼9 times than that for physical extraction and that effect of extractants on the degree of extraction of organic acid was the order of OA<TOMAC<DOA<TOA. And the degree of extraction was increased with increasing the concentration of extractants. In solvent effect, solubility parameter was more effective than dielectric constant of solvent, and the degree of extraction increased as the difference of solubility parameter of solvent and solute decreased, therefore the order was kerosine<xylene<chloroform<MIBK<n-BAc.

Trioctylamine에 의한 유기산의 추출

강안수,이병철,이한섭,안형환,이영주,류운형 明知大學校 産業技術硏究所 1993 産業技術硏究所論文集 Vol.12 No.-

For elucidation of various parameter's effect on the reactive extraction of organic acidstrioctylamine(TOA)-diluents system, the association model, equilibrium constants and extraction factors(loading) were investigated . The organic acids rosed were propionic. succinic, masonic, and benzoic acid. Extractant was tertiary amine, TOA and diluents were butylaeohol, hexane, and benzene. It was concluded that the loading of monobasic acid of propionic acid were higher than that of dibasic acids of oxalic, and malonic acid with extranctant TOA. In the extraction of monobasic acid the extraction factor was not affected by the initial concentration of extractant amine, but in the extraction of dibasic acids the extraction factor was getting better with decreasing the initial concentration of amine. There was a strong effect of diluents upon the extractien factor, and the order of these factor was as shown below: xylene<Benzene<butylalcohol<choloroform<methylisobutylketone.

지방족 C -아민류 추출제에 의한 유기산의 반응 추출

이한섭,강안수,류운형 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

The effects of extractant species, concentration, solvent and temperature on the degree of extraction were investigated, and also the effects of concentration of stripping phase and temperature on the degree of re-extraction were investigated in physical and reactive extraction system using equilibrium extraction unit. The used organic acids were acrylic acid, methacrylic acid, pyruvic acid, α-ketoglutaric acid, and the extractants were n-octylamine(OA, primary amine), di-n-octylamine(DOA, secondary amine), tri-n-octylamine(TOA, tertiary amine) and Aliquat 336. (TOMAC, quaternary ammonium salt). N-butylacetate(n-BAc), methyl-isobutyl-ketone(MIBK), chloroform, xylene and kerosene were used as solvents. The effect of the degree of re-extraction was investigated using alkaline solution of NaOH and Na₂CO₃. We found that the degree of extraction for reactive extraction was 2∼9 times than that for physical extraction and that the effect of extractants on the degree of extraction of organic acid was the order of OA>TOMA>DOA>TOA. And the degree of extraction was increased with increasing the concentration of extractants. In solvent effect, solubility parameter was more effective than dielectric constant of solvent, and the degree of extraction increased as the difference of solubility parameter of solvent and solute decreased, therefore the order was kerosene>xylene>chloroform>MIBK>n-BAc. Also, the degree of re-extraction increased with decreasing basicity of stripping phase, therefore, the degree of re-extraction for re-extraction of organic acid was higher in Na₂CO₃solution than in NaOH solution. As a result of the effect of temperature, the degree of extraction was decreased and re-extraction was increased with increasing temperature, respectively.

Lyocell 섬유를 함유한 종이의 제조 및 적용에 관한 연구( I )

김종열,류운형,유성종,김정열,신창호,김영호 한국연초학회 2000 한국연초학회지 Vol.22 No.1

In order to investigate the applicability of lyocell fiber to filter paper, papper sheets were manufactured with the addition of lyocell fibers in various length(1.5 denier: 2, 3, 4mm) and content(10, 30, 50%) and their physical characters, such as fibrilation rate, adsorption efficiency of methylene blue(MB), paper formation, and crimping ability, etc, were tested. The level of main fibrilation from lyocell fiber was higher in wet beating process than that in free beating because of the higher strength of lyocell fiber compared with wood fiber. Fibrilation could be observed at the degree of beating over 30$^{\circ}$ SR in wet beating with Valley beater. The air permeability and tear factor of the paper increased and the paper formation index decreased according to the increase of fiber length. The weak binding force of lyocell fiber in spite of its higher fiber strength, might be a limitng factor in addition of lyocell fiber to the natural wood pulp in manufacturing the paper having the needed physical properties. High contents of wood pulp decreased air permeability, the breaking length, tear factor, the bursting strength, and paper formation index in paper sheets. As the contents of lyocell increased from 10% to 100%, the adsorption efficiency of MB was elevated to 1.7-7.9 times compared with that in 100% wood pulp. But the length of lyocell fiber did not affect the MB adsorption.

Printing Photoresist의 특성에 관한 연구

이한섭,류운형 용인대학교 자연과학연구소 2003 自然科學硏究所論文誌 Vol.8 No.1

Naphthoquinone diazide derivatives members of quinone diazide compound that are utihizable as photosensitve polymer material were synthesized, and photoresist were prepared by mixing these derivatives with a matrix resm at various weight ratios. Photosensitive characteristics of photoresist were studied by examining UV and IR, relative sensitivity using a Gray scale method, and SEM to analyze if they can be used as photosensitive material in printing process Experimental results showed that, by UV, NQD derivatives were photo-converted and developer-soluble photoresist were produced. The mixing ratio of 1 4(by mass) of NQD+ballas : and m-cresol novolak gave nse to the highest dissolution rate. In addition, photoresist obtained at this condition resulted in the most superior sensitivity and contrast

저급 국산골판지원지의 강도강화방법 연구

김종경,류운형,주상명,이환 한국포장학회 2005 한국포장학회지 Vol.11 No.1

For both economic and ecological reasons corrugated box manufacturers are seeking to produce acceptably strong boxes while using more recycled paper. This study was to develop hydrophilic coating agents in order to improve overall physical properties of recycled corrugated fiberboard liners. Two coating agents were developed and applied to ``S`` corrugating medium. The results showed that compression strength of new liners, named ``S-A`` and ``S-B``, were increased significantly both standard humidity and high humidity environment and it was as much as ``SK`` liner. New developed liners were also economically advantageous since new liners were estimated about one hundred fifty dollars per ton cheaper than SK liner. The study indicated that further work is needed on the coating technology and machine development.

텐셀섬유를 활용한 한지의 제조 ( Manufacture of Hanji Using Tencel Fiber )

민춘기,조중연,신준섭,류운형 한국펄프·종이공학회 2001 펄프.종이기술 Vol.33 No.4

선택적 방향과 향기의 지속성을 갖는 고기능성 마이크로캡슐 한지의 제조

조중연,신준섭,민춘기,이선호,류운형 한국펄프·종이공학회 2000 한국펄프·종이공학회 학술발표논문집 Vol.2 No.-

추출 방향성 물질을 함유한 마이크로 캡슐의 제조와 한지에의 적용 ( Microcapsulations of Aromatic Essential Oils and Their Application to Korean Traditional Hanji (paper) )

조중연,신준섭,민춘기,류운형,이선호 한국펄프·종이공학회 2001 펄프.종이기술 Vol.33 No.2