scholarly journals Highly Efficient, Tripodal Ion-Pair Receptors for Switching Selectivity between Acetates and Sulfates Using Solid–Liquid and Liquid–Liquid Extractions

2020 ◽  
Vol 21 (24) ◽  
pp. 9465
Author(s):  
Marta Zaleskaya ◽  
Łukasz Dobrzycki ◽  
Jan Romański
Keyword(s):  
Binding Sites ◽  
Liquid Extraction ◽  
Ion Pair ◽  
Anion Binding ◽  
Binding Modes ◽  
Anion Receptor ◽  
X Ray ◽  
Liquid Liquid Extraction ◽  
Solid Liquid Extraction ◽  
Solid Liquid

A tripodal, squaramide-based ion-pair receptor 1 was synthesized in a modular fashion, and 1H NMR and UV-vis studies revealed its ability to interact more efficiently with anions with the assistance of cations. The reference tripodal anion receptor 2, lacking a crown ether unit, was found to lose the enhancement in anion binding induced by presence of cations. Besides the ability to bind anions in enhanced manner by the “single armed” ion-pair receptor 3, the lack of multiple and prearranged binding sites resulted in its much lower affinity towards anions than in the case of tripodal receptors. Unlike with receptors 2 or 3, the high affinity of 1 towards salts opens up the possibility of extracting extremely hydrophilic sulfate anions from aqueous to organic phase. The disparity in receptor 1 binding modes towards monovalent anions and divalent sulfates assures its selectivity towards sulfates over other lipophilic salts upon liquid–liquid extraction (LLE) and enables the Hofmeister bias to be overcome. By changing the extraction conditions from LLE to SLE (solid–liquid extraction), a switch of selectivity from sulfates to acetates was achieved. X-ray measurements support the ability of anion binding by cooperation of the arms of receptor 1 together with simultaneous binding of cations.

scholarly journals EKSTRAKSI PADAT-CAIR ZnO DENGAN ASAM DARI DEBU FILTER PROSES PEMBUATAN BAJA

2017 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Ricson P. Hutagaol ◽  
Nasrudin Nasrudin ◽  
Agus Taufik
Keyword(s):  
Zinc Oxide ◽  
Liquid Extraction ◽  
Raw Material ◽  
X Ray ◽  
Process Testing ◽  
Steel Making ◽  
Solid Liquid Extraction ◽  
Filter Dust ◽  
Dust Filter ◽  
Solid Liquid

ZnO Solid – Liquid Extraction with Filter Dust Acid from The Steel Making Proccess           Zinc Oxide is a white metal oxide which is widely used in various industries. Zinc oxide can be produced with the direct, indirect process (method of France) and hydrometallurgical. Source manufacture ZnO derived from material containing zinc metal. The content of ZnO in the dust filter in the steel making process as a potential raw material for the manufacture of ZnO. The purpose of this study was to determine the type of acid and concentration were better for extraction ZnO viewed from purity and the yield. This research was conducted by method of  solid-liquid extraction, followed by the presipitation process. Testing of purity of ZnO with better extraction result were H2SO4 0,75 M was 89.67% with a yield of 97.73%, while the H2SO4 0,50 M was 80.45% (yield 63.96%), H2SO4 0,25 M was 76,48% (46.95% yield), HCl 0,75 M was 79.23% (81.70% yield), HCl 0,50 M was 76.98% (yield 49%), and HCl 0,25 M was 74.57% (30.23% yield). ZnO composition data from extraction results were analyzed using X-ray fluorescence (XRF).Key words: Solid-liquid extraction, ZnO, Dust, Steel, XRF ABSTRAK             Seng Oksida merupakan oksida logam berwarna putih yang banyak digunakan di berbagai industri. Seng oksida dapat diproduksi dengan proses langsung, proses tidak langsung (metode Prancis) dan hidrometalurgi. Sumber pembuatan ZnO berasal dari material yang mengandung logam seng. Kandungan ZnO dalam debu filter pada proses pembuatan baja berpotensi sebagai bahan baku untuk pembuatan ZnO. Tujuan dari penelitian ini adalah menentukan jenis asam dan konsentrasi yang lebih baik untuk ekstraksi ZnO dilihat dari kemurnian dan rendemennya. Penelitian ini dilakukan dengan metode ekstraksi padat-cair  yang dilanjutkan dengan proses pengendapan. Pengujian kemurnian ZnO hasil ekstraksi yang lebih baik yaitu H2SO4 0,75 M adalah 89,67% dengan rendemen 97,73%, sedangkan H2SO4 0,50 M adalah  80,45% (rendemen 63,96), H2SO4 0,25 M adalah 76,48% (rendemen 46,95%), HCl 0,75 M adalah 79,23% (rendemen 81,70%), HCl 0,50 M adalah 76,98% (rendemen 49%), dan HCl 0,25 M adalah 74,57% (rendemen 30,23%). Data komposisi hasil ekstraksi ZnO yang dianalisis menggunakan X-ray fluorescence (XRF).Kata Kunci : Ekstraksi padat-cair, ZnO, Debu Baja, XRF

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.

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...

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