Superiority of polymeric scavenger over its hexapodal monomer towards efficient ReO4- removal in water

2021 ◽  
Author(s):  
Pradyut Ghosh ◽  
Rajib Ghosh ◽  
Tamal Kanti Ghosh
Keyword(s):  
Aqueous Medium ◽  
Liquid Extraction ◽  
Efficient Removal ◽  
Solid Liquid Extraction ◽  
Solid Liquid

A new imidazolium functionalized hexapodal polymeric receptor, [PHIm-Br] showed selective and efficient removal (>99%) of perrhenate (ReO4-), from 100% aqueous medium via solid-liquid extraction which was 13% higher as compared...

scholarly journals Synthesis of Glucose Based Water Soluble Molecular Tweezers as Molecular Recognition Scaffolds

2011 ◽  
Vol 8 (1) ◽  
pp. 319-325
Author(s):  
Lalit Sharma
Keyword(s):  
Aqueous Medium ◽  
Fold Increase ◽  
Liquid Extraction ◽  
Water Soluble ◽  
Dilute Acid ◽  
Molecular Tweezers ◽  
Dry Heating ◽  
Tertiary Amino ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Dry heating of 4,4’-methylenedianiline andN,N’-dimethyl-4,4’-methylenedianiline with 5,6-anhydro-1,2-o-isopropylidene-α-D-glucofuranose afforded molecular tweezers having tertiary amino group linked to C-6 of the glucose moiety. These molecular tweezers on deprotection with dilute acid yielded water soluble analogs which were explored for the solubilization of neutral arenesviz. naphthalene, biphenyl, durene, fluorene, anthracene and phenanthrene in acidic aqueous medium. These solid liquid extraction studies revealed that 6,6’-(N,N’-dimethyl-4’’,4’’’-methylenedianilino) bis (α-D-glucopyranose) causes an approximate 31 fold increase in the solubility of biphenyl in aqueous medium and has best complementarity for naphthalene by forming 1:1 complex.

Rotation planar extraction and medium-pressure solid-liquid extraction of onion (Allium cepa)

2003 ◽  
Vol 16 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Irena Vovk ◽  
Breda Simonovska ◽  
Samo Andrenšek ◽  
Teijo Yrjönen ◽  
Pia Vuorela ◽  
...  
Keyword(s):  
Allium Cepa ◽  
Liquid Extraction ◽  
Medium Pressure ◽  
Solid Liquid Extraction ◽  
Solid Liquid

MASS TRANSFER IN SOLID-LIQUID EXTRACTION AT HIGH SOLUTE CONCENTRATIONS

2018 ◽  
Vol 17 (4) ◽  
pp. 827-839
Author(s):  
Eugenia Teodora Iacob Tudose ◽  
Marcela Popa ◽  
Ioan Mamaliga
Keyword(s):  
Mass Transfer ◽  
Liquid Extraction ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Ultrasound Assisted Solid-Liquid Extraction Devices - Harnessing Active Ingredients from Plant materials – Overview and Analysis

2020 ◽  
Vol 13 ◽  
Author(s):  
Venkatasubramanian Sivakumar
Keyword(s):  
Mass Transfer ◽  
Cell Wall ◽  
Plant Cell ◽  
Plant Cell Wall ◽  
Liquid Extraction ◽  
Active Ingredients ◽  
Plant Materials ◽  
Ultrasound Assisted ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Background: In the growing environmental concern use of natural products, efficient processes and devices are necessary. Solid-Liquid extraction of active Ingredients from Plant materials is one of the important unit operations in Chemical Engineering and need to be enhanced. Objectives: Since, these active ingredients are firmly bound to the plant cell wall membrane, which pose mass-transfer resistance and need to get detached through the use of suitable process intensification tools such as ultrasound and suitable devices. Therefore, detailed analysis and review is essential on development made in this area through Publications and Patents. Hence, the present paper illustrates the development of ultrasound assisted device for solid-liquid extraction are presented in this paper. Methods: Advantages such as % Yield, Reduction in extraction time, use of ambient conditions, better process control, avoidance or minimizing multi stage extraction could be achieved due to the use of ultrasound in extraction as compared to conventional processes. Conclusions: Use of ultrasound to provide significant improvements in the extraction of Vegetable tannins, Natural dyes for application in Leather processing has been demonstrated and reported earlier. These enhancement could be possible through various effects of ultrasound such as better flow of solvents through micro-jet formation, mass transfer enhancement due to rupture of plant cell wall membranes through acoustic cavitation, better leaching due to micro-mixing and acoustic streaming effects. This approach would minimize material wastage; thereby, leading to eco-conservation of plant materials, which is very much essential for better environment. Hence, various methods and design for application of ultrasound assisted solid-liquid extractor device are necessary.

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