scholarly journals Preparation of High-Purity Trilinolein and Triolein by Enzymatic Esterification Reaction Combined with Column Chromatography

2019 ◽  
Vol 68 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Beibei Zhao ◽  
Hua Li ◽  
Tao Lan ◽  
Di Wu ◽  
Li Pan ◽  
...  
Keyword(s):  
Column Chromatography ◽  
High Purity ◽  
Esterification Reaction ◽  
Enzymatic Esterification

scholarly journals Isolation of high purity 73Se using solid phase extraction after selective 4,5-[73Se]benzopiazselenol formation with aminonaphthalene

2018 ◽  
Vol 106 (6) ◽  
pp. 497-505 ◽  
Author(s):  
Uwe Königs ◽  
Swen Humpert ◽  
Ingo Spahn ◽  
Syed M. Qaim ◽  
Bernd Neumaier
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfur Dioxide ◽  
Solid Phase Extraction ◽  
Arsenic Trioxide ◽  
Column Chromatography ◽  
High Purity ◽  
Solid Phase ◽  
Phase Extraction ◽  
Recovery Yield ◽  
Efficient Process

AbstractA fast and efficient process for the production of the PET radionuclide73Se was developed using75Se as a surrogate.75Se was separated from proton irradiated arsenic trioxide by reaction with 2,3-diaminonaphthalene to 4,5-[75Se]benzopiazelenol. This compound was purified using SPE column chromatography and subsequently decomposed with hydrogen peroxide. For further chemical conversions [75Se]selenite was reduced to elemental [75Se]selenium by either using thiosulfate or sulfur dioxide. The recovery yield of75Se from the target amounted to 43%. The utility of the isolated75Se for radiosyntheses was demonstrated by the successful preparation of [75Se]selenomethionine. The methodology developed using75Se was successfully transformed to73Se.

scholarly journals Design and simulation of high purity biodiesel reactive distillation process

2019 ◽  
Vol 21 (3) ◽  
pp. 1-7 ◽  
Author(s):  
Syed Sadiq Ali ◽  
Mohammad Asif ◽  
Avijit Basu
Keyword(s):  
High Purity ◽  
Fossil Fuels ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Aspen Plus ◽  
Esterification Reaction ◽  
Distillation Process ◽  
Water Composition ◽  
Product Stream ◽  
Process Simulator

Abstract Biodiesel is a promising energy substitute of fossil fuels since it is produced from renewable and biodegradable sources. In the present work, reactive distillation (RD) process is designed and simulated using Aspen Plus process simulator to produce biodiesel of high purity through esterification reaction. The simultaneous reaction and separation in same unit enhances the biodiesel yield and composition in RD process. Two flowsheets are proposed in present work. In the first flowsheet, the unreacted methanol is recycled back to reactive distillation column. Biodiesel with 99.5 mol% purity is obtained in product stream while the byproduct stream comprises 95.2 mol% water, which has to be treated further. In the second flowsheet, a part of methanol recycle is split and purged. In this case, the biodiesel composition in product stream is 99.7 mol% whereas water composition is 99.9 mol% in byproduct stream, which can be reused for other process without treatment.

scholarly journals Pemurnian diasilgliserol dari produk gliserolisis minyak sawit mentah dengan kromatografi kolom Purification of diacylglycerol from glycerolysis products of crude palm oil using column chromatography

2016 ◽  
Vol 79 (1) ◽  
Author(s):  
. TRI-PANJI ◽  
. SUHARYANTO ◽  
Urip PERWITASAR
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Stationary Phase ◽  
Column Chromatography ◽  
Palm Oil ◽  
High Purity ◽  
Rhizopus Oryzae ◽  
Optimal Concentration ◽  
Crude Palm Oil ◽  
Scale Experiment

AbstractVegetable oil enriched with diacylglycerol (DAG) isknown as healthy oil. This oil is much more expensive thancooking oil. Production of DAG could be performed byglycerolysis process of CPO using specific lipase of 1,3-glyceride from Rhizopus oryzae mold. Product derived fromglycerolysis process of CPO is a mixture of DAG, mono-acylglycerol (MAG), free fatty acid (FFA) and residual ofunglycerolysed triacylglyserol (TAG). Therefore the DAGproduct has to be isolated from other components in order toget high purity of DAG. The objective of the research was topurify and to find out optimal concentration of DAG derivedfrom a mixture product of CPO glycerolysis at laboratoryscale experiment (total reactant for glycerolysis was93.8 mL) and semipilot scale experiment (10 times oflaboratory scale) using column chromatography with silicagel as stationary phase. The research showed that thehighest DAG content could be collected at fraction of 26 th i.e65%, while at semipilot scale experiment the highest contentof DAG (97%) was achieved at 64 to 66th fraction.Reglycerolysis of residual CPO only yielded 8.24%glycerolysis product which was much lower than that of thefirst glycerolysis reaching 46.67%. The highest DAG derivedfrom the second reglycerolysis product was achieved at 24 thfraction reaching 35.71 % .AbstrakMinyak nabati kaya kandungan diasilgliserol (DAG)dikenal sebagai minyak sehat (healthy oil). Minyak ini jauhlebih mahal dari minyak makan biasa. Produksi DAG dapatdilakukan dengan proses gliserolisis CPO menggunakanenzim lipase spesifik 1,3-gliserida dari kapang Rhizopusoryzae. Produk gliserolisis CPO triasilgliserol adalahcampuran DAG, monoasilgliserol (MAG) dan asam lemakbebas (ALB) serta residu triasilgliserol (TAG) yang tidaktergliserolisis. Oleh karena itu DAG yang terbentuk harusdipisahkan dari komponen lainnya agar diperoleh fraksi DAGdengan kemurnian tinggi. Penelitian ini bertujuan untukmemurnikan dan menetapkan konsentrasi DAG yang dapatdiperoleh dari gliserolisis CPO skala lab (total reaktan93,8 mL) dan skala semipilot (10 kali skala laboratorium)dengan kromatografi kolom menggunakan fase padat silikagel. Residu TAG dari gliserolisis pertama digunakan untukgliserolisis kedua atau gliserolisis ulang. Hasil penelitianmenunjukkan bahwa fraksi DAG dengan konsentrasitertinggi diperoleh pada fraksi ke-26 yaitu sebesar 65%,sedangkan pada percobaan dengan skala semipilot (10 kaliskala laboratorium) diketahui bahwa konsentrasi DAGtertinggi (97%) diperoleh pada fraksi ke-64 sampai denganke-66. Gliserolisis kedua dari residu CPO hanya mampumenghidrolisis TAG menjadi campuran DAG, MAG danALB sekitar 8,24%, lebih kecil dari reaksi gliserolisispertama yaitu sebesar 46,67%. DAG tertinggi yang berhasildikumpulkan dari produk gliserolisis kedua adalah padafraksi ke-24 yaitu sebesar 35,71% .

scholarly journals Enzymatic Esterification as Potential Strategy to Enhance the Sorbic Acid Behavior as Food and Beverage Preservative

Fermentation ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 96
Author(s):  
Federico Zappaterra ◽  
Daniela Summa ◽  
Bruno Semeraro ◽  
Raissa Buzzi ◽  
Claudio Trapella ◽  
...  
Keyword(s):  
Sorbic Acid ◽  
Immobilized Lipase ◽  
Antimicrobial Properties ◽  
Esterification Reaction ◽  
Enzymatic Esterification ◽  
Free System ◽  
Food And Beverage ◽  
Solvent Free System ◽  
Potential Strategy ◽  
Acid Derivate

Sorbic acid is the most commonly used preservative in the food industry. The antimicrobial inhibition of sorbic acid could be influenced by its lipophilic nature, which reduces its use in hydrophilic food formulations. Reactions between sorbic acid and glycerol catalyzed by lipases were studied in order to develop a novel sorbic acid derivate with a promising hydrophilic profile. The esterification reaction between sorbic acid and glycerol in a solvent-free system were performed with an immobilized lipase B from Candida antarctica (CALB). The glycerol sorbate product has been tested against S. griseus bacterium and Saccharomyces cerevisiae yeast. Results indicate that the esterification of sorbic acid with glycerol does improve its antimicrobial properties against Saccharomyces cerevisie. The reported results demonstrate that esterification can be used as a strategy to improve the antimicrobial activity of sorbic acid.

High Purity Isolation and Quantification of Semiconducting Carbon Nanotubes via Column Chromatography

ACS Nano ◽  
2013 ◽  
Vol 7 (4) ◽  
pp. 2971-2976 ◽  
Author(s):  
George S. Tulevski ◽  
Aaron D. Franklin ◽  
Ali Afzali
Keyword(s):  
Carbon Nanotubes ◽  
Column Chromatography ◽  
High Purity

Separation of high-purity syringol and acetosyringone from rice straw-derived bio-oil by combining the basification-acidification process and column chromatography

2016 ◽  
Vol 37 (19) ◽  
pp. 2522-2530 ◽  
Author(s):  
Shilai Hao ◽  
Kaifei Chen ◽  
Leichang Cao ◽  
Xiangdong Zhu ◽  
Gang Luo ◽  
...  
Keyword(s):  
Rice Straw ◽  
Column Chromatography ◽  
High Purity ◽  
Bio Oil

scholarly journals SYNTHESIS AND CHARACTERIZATION OF CELLULOSE STEARATE ESTER FROM BACTERIAL CELLULOSE AND STEARIC ACID ENZYMATICALLY USING IMMOBILIZED LIPASE

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 256 ◽  
Author(s):  
Suci Amaliyah
Keyword(s):  
Stearic Acid ◽  
Bacterial Cellulose ◽  
Immobilized Lipase ◽  
Group Analysis ◽  
Gravimetric Method ◽  
Crystallinity Index ◽  
Esterification Reaction ◽  
Enzymatic Esterification ◽  
Mass Ratio ◽  
Esterification Degree

The aims of this study were to determine the optimum conditions of enzymatic esterification between stearic acid with bacterial cellulose using immobilized lipase and to characterize the obtained ester. The optimum condition was observed by the effects of time and mass ratio of cellulose: stearic acid towards degree of esterification. The esterification reaction carried out in a heterogeneous system using n-butanol as solvent at 50 °C. The effect of reaction time on esterification degree is done by variating incubation time for 6, 12, 18, 24 and 30 hours. The influence of the mass ratio of cellulose: stearic acid to the esterification degree was carried out by variating 1: 1, 1: 2, 1: 3, 1: 4, 1: 5 and 1: 6. Products characterization consist of functional group analysis by Fourier Transform Infra Red (FTIR), determining degree of substitution (DS) by saponification, swelling index by gravimetric method, and cristallinity by X-Ray Diffraction (XRD). The results showed that condition of esterification was optimum in 18 hours of reaction with mass ratio 1:5. The success of esterification was confirmed by FTIR spectrum that showed ester carbonyl peak at 1718.46 cm-1 . DS of  cellulose stearate ester was 0.35. The swelling and crystallinity index of cellulose stearate was smaller than bacterial cellulose.

Synthesis and Characterization of 2-Di-methyl Amino Ethyl Laurate Betaine Surfactant

2021 ◽  
Vol 58 (3) ◽  
pp. 220-229
Author(s):  
Rutu Parikh ◽  
Shital Godse ◽  
Nitin Pawar ◽  
Amit Pratap
Keyword(s):  
Coconut Oil ◽  
Enzyme Concentration ◽  
Molar Ratio ◽  
Esterification Reaction ◽  
Enzymatic Esterification ◽  
H Nmr ◽  
Temperature Time ◽  
By Products ◽  
Betaine Ester

Abstract The growing need for sustainable natural-based surfactants from green chemistry has led to syntheses of surfactants without the use of solvents and without the generation of by-products when milder manufacturing processes are used. The zwitterionic betaine ester surfactants are derived from natural renewable sources and are biodegradable. In this research, the betaine ester surfactant 2-di-methylaminoethyllaurate betaine was synthesized from 2-di-methylaminoehanol and lauric acid derived from coconut oil in a three-step chemo-enzymatic esterification reaction. The enzymatic process was optimized in terms of operating parameters such as temperature, time, molar ratio and enzyme concentration, resulting in a yield of 87.91%. Structural analysis of the intermediate 2-di-methylaminoethyl laurate as well as the final product 2-di-methylaminoethyl laurate betaine was carried out with FTIR and 1H NMR. The surfactant properties of the betaine were also determined and showed that the betaine can be used as a co-surfactant in many cosmetic and personal care products.

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