نتایج جستجو برای: supercritical fluid technology

تعداد نتایج: 690163  

Journal: :Trends in Analytical Chemistry 2022

Separation and purification of complex mixtures are a necessity challenge in many industrial fields. Preparative chromatography is technique used to separate, purify, isolate the different components found these mixtures. Supercritical fluid (SFC) an attractive industry due its analysis speed, low cost, green nature, application space. As such, SFC has been appropriately scaled match industry's...

2012
B. S. Wakure A. V. Yadav

A supercritical fluid (SF) can be defined as a dense non condensable fluid. A fluid reaches the supercritical status when its temperature and pressure exceed the relevant critical temperature and pressure. At the critical point only a single phase exists which has some properties typical of liquids (density) and some of gases (viscosity, compressibility, and mass diffusion coefficient). For pha...

2014
Hu-Fan Song Ai-Zheng Chen Shi-Bin Wang Yong-Qiang Kang Shi-Fu Ye Yuan-Gang Liu Wen-Guo Wu

Using ammonium bicarbonate (AB) particles as a porogen, chitosan (CS)-based hemostatic porous sponges were prepared in supercritical carbon dioxide due to its low viscosity, small surface tension, and good compatibility with organic solvent. Fourier transform infrared spectroscopy (FTIR) spectra demonstrated that the chemical compositions of CS and poly-(methyl vinyl ether-co-maleic anhydride) ...

Journal: :International journal of pharmaceutics 2005
Chandra Vemavarapu Matthew J Mollan Mayur Lodaya Thomas E Needham

Consistent production of solid drug materials of desired particle and crystallographic morphologies under cGMP conditions is a frequent challenge to pharmaceutical researchers. Supercritical fluid (SCF) technology gained significant attention in pharmaceutical research by not only showing a promise in this regard but also accommodating the principles of green chemistry. Given that this technolo...

2011
M. Fraile A. Martín M. J. Cocero

The advantage of the application of the supercritical extraction in contrast to the conventional methods to prepare micro and nanoparticles is that the product no longer is exposed to high temperatures for a long time. Furthermore, the supercritical extraction offers the possibility to reduce the content of the residual organic solvent in the final product because of the high solubility of orga...

2003
Bhupinder Singh Sekhon

Supercritical fluid technologies (SCFT) represent a recent approach for obtaining pharmaceutical materials in pure physical form and the application of supercritical fluids is a superior alternative to conventional precipitation and extraction processes. Supercritical fluid technology (SCFT) offers exciting opportunities to produce and modify pharmaceutical substances and has the potential to r...

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