Investigating the solid-liquid extraction process of puerarin by molecular dynamics simulations

2019 ◽  
Vol 143 ◽  
pp. 118584 ◽  
Author(s):  
Yuefei Zhang ◽  
Zhangli Zhou ◽  
Lian Zou ◽  
Mei Zhang ◽  
Ruan Chi
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Solid Liquid Extraction ◽  
Dynamics Simulations ◽  
Solid Liquid

scholarly journals Comparison between Two Solid-Liquid Extraction Methods for the Recovery of Steviol Glycosides from Dried Stevia Leaves Applying a Numerical Approach

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 105 ◽  
Author(s):  
Monica Gallo ◽  
Andrea Formato ◽  
Gaetano Formato ◽  
Daniele Naviglio
Keyword(s):  
Stevia Rebaudiana ◽  
Value Added ◽  
Numerical Approach ◽  
Extraction Process ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Steviol Glycosides ◽  
Stevia Rebaudiana Bertoni ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Abstract: Stevia rebaudiana Bertoni is a perennial shrub belonging to the Asteraceae family. The leaves contain a mixture of steviol glycosides with extraordinary sweetening properties, among which the most important are stevioside and rebaudioside A. These components have a high sweetening power, which is about 300 times that of sucrose, and a negligible calorie content. However, their extraction and purification are not easy. In this paper, the extraction technique under cyclic pressure, known as rapid solid-liquid dynamic extraction (RSLDE), was compared using a Naviglio extractor (NE) with conventional maceration. The aim was to identify an efficient and economically viable method for obtaining high amounts of steviol glycosides in a short time. Furthermore, a numerical model was set up for the solid-liquid extraction process of value-added compounds from natural sources. Several parameters must be evaluated in relation to the characteristics of the parts of the plant subjected to extraction. Therefore, since diffusion and osmosis are highly dependent on temperature, it is necessary to control the temperature of the extraction system. On the other hand, the final aim of this work was to provide a scientific and quantitative basis for RSLDE. Therefore, the results obtained from stevia extracts using the corresponding mathematical model allowed hypothesizing the application of this model to the extraction processes of other vegetable matrices.

Simulation of Dynamics of Solid-Liquid Transition

1995 ◽  
Vol 407 ◽  
Author(s):  
Y. Kogure ◽  
H. Masuyama ◽  
M. Doyama
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Nearest Neighbour ◽  
Neighbour Distance ◽  
Liquid Transition ◽  
Dynamics Simulations ◽  
Solid Liquid ◽  
Copper Crystals

ABSTRACTMolecular dynamics simulations on the solid-liquid transition of copper crystals have been performed. The configulation and the motion of atoms are monitored by RDF. It is seen that the height of the first peak in the RDF, which located at the nearest neighbour distance, decreased drastically as the temperature is increased.

scholarly journals Nonequilibrium molecular dynamics simulations of nanoconfined fluids at solid-liquid interfaces

2017 ◽  
Vol 146 (24) ◽  
pp. 244507 ◽  
Author(s):  
M. Morciano ◽  
M. Fasano ◽  
A. Nold ◽  
C. Braga ◽  
P. Yatsyshin ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Nonequilibrium Molecular Dynamics ◽  
Liquid Interfaces ◽  
Dynamics Simulations ◽  
Solid Liquid

scholarly journals EKSTRAKSI SILIKA DARI ABU SEKAM PADI DENGAN PELARUT KOH

Konversi ◽  
2013 ◽  
Vol 2 (1) ◽  
pp. 28
Author(s):  
Galang Fajar Agung M ◽  
Muhammad Rizal Hanafie Sy ◽  
Primata Mardina
Keyword(s):  
Raw Materials ◽  
Operation Time ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Waste Material ◽  
Alkali Solution ◽  
Rice Husks ◽  
Solid Liquid Extraction ◽  
The One ◽  
Solid Liquid

Sekam padi sebagai limbah yang berlimpah khususnya di negara agraris, adalah salah satu sumber penghasil silika terbesar. Sekam padi mengandung sekitar 90%-98% silika setelah mengalami pembakaran sempurna. Pengambilan silika dari abu sekam padi dilakukan dengan proses ekstraksi padat cair menggunakan larutan alkali sebagai pelarut. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi larutan alkali dan waktu operasi terhadap yield dari silika. Proses ekstraksi dilakukan dalam skala laboratorium. Sepuluh gram abu sekam padi dimasukkan ke dalam 60 mL larutan alkali dengan konsentrasi tertentu (5%w/w, 10% w/w dan 15% w/w) untuk diekstrak kandungan silika dengan waktu operasi tertentu (30, 60 dan 90 menit). Setelah proses ekstraksi selesai, larutan tersebut ditambahkan larutan HCl 1 N untuk mengendapkan silika. Silika yang terbentuk kemudian dipisahkan dari sisa larutan dengan penyaringan. Untuk menghilangkan kelembaban pada silika yang dihasilkan, maka dilanjutkan dengan proses pengeringan. Hasil penelitian menunjukkan yield silika terbesar adalah 50,49% terjadi pada KOH 10% dan waktu ekstraksi 90 menit.  Keywords: abu sekam padi, silika, KOH  Rice husks, the most abundant waste material in agricultural country, is the one of the silica rich raw materials. Rice husks contain about 90%-98% of silica after completed combustion. Recovery silica from ash of  rice husks was done by solid-liquid extraction using alkali solution. Different concentration of alkali solution (5% w/w, 10% w/w and 10% w/w) and different operation time (30, 60 and 90 minutes) were used to investigate their influence on yields of silica. The extraction process was carried out in laboratory scale. After extraction, process was continued by acidic solidification, filtration and drying. The result showed the biggest yield of  silica was 50, 49% at 10% KOH for 90 minutes . Keywords: ash of rice husks, silica, KOH

Multipolar/Polarizable Molecular Dynamics Simulations of Liquid-Liquid Extraction of Benzene from Hydrocarbons Using Ionic Liquids

2019 ◽  
Author(s):  
Erik A. Vazquez-Montelongo ◽  
G. Andres Cisneros ◽  
Hugo Flores
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Molecular Dynamics Simulations ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Dynamics Simulations ◽  
Structural Insights

<div><p>We used AMOEBA to explore the capacity of 1,3 dimethylimidazolium tetrafluorobrorate, [DMIM][BF4], </p> <p>and ethyl-methylimidazolium tetrafluorobrorate, [EMIM][BF4], to extract benzene from a mixture of benzene-dodecane. Our results indicate that [DMIM][BF4] exhibits better selectivity and provide structural insights on possible reasons for the observed preference.</p><br></div>

Sign in / Sign up

Export Citation Format

Share Document