The role of intraparticle diffusion path length during electro-assisted regeneration of ion exchange resins: Implications for selective adsorbent design and reverse osmosis pretreatment

2021 ◽  
Vol 407 ◽  
pp. 127821
Author(s):  
Hang Dong ◽  
Ziyan Wu ◽  
Matthew J. Liu ◽  
William A. Tarpeh
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Path Length ◽  
Diffusion Path ◽  
Intraparticle Diffusion ◽  
Ion Exchange Resins ◽  
Diffusion Path Length ◽  
Selective Adsorbent ◽  
Exchange Resins

Innovative concepts of regeneration of decolorization ion exchange resins in sugar refineries

2016 ◽  
pp. 377-380
Author(s):  
Marc André Théoleyre ◽  
Anne Gonin ◽  
Dominique Paillat
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Energy Supply ◽  
Ion Exchange Resins ◽  
Salt Solutions ◽  
Nanofiltration Membranes ◽  
Local Conditions ◽  
Salt Consumption ◽  
Multiple Effect ◽  
Exchange Resins

Regeneration of resins used for decolorization of sugar solutions is done with concentrated salt solutions. Nanofiltration membranes have been proven effective, in terms of industrial efficiency in decreasing salt consumption. More than 90% of the salt that is necessary for regeneration can be recycled through a combination of direct recycling of intermediate eluates, the separation of colored compounds by use of very selective nanofiltration membranes and a system to concentrate salty permeates. According to specific local conditions on energy supply and cost, the concentration of salty permeates can be either a multiple effect evaporator or a combination of electrodialysis and reverse osmosis. The desalted color compound solution is sent to the molasses, limiting considerably the effluent to be treated. Starting from a liquor of 800 IU, the water requirement is limited to less than 100 L/t of sugar and the amount of wastewater can be reduced to less than 40 L/t of sugar.

Supported acid catalysis with ion-exchange resins I. Role of benzene as solvent during the prins reaction

1978 ◽  
Vol 4 (6) ◽  
pp. 443-447 ◽  
Author(s):  
Michel Delmas ◽  
Philippe Kalck ◽  
Jean-Pierre Gorrichon ◽  
Antoine Gaset
Keyword(s):  
Ion Exchange ◽  
Acid Catalysis ◽  
Ion Exchange Resins ◽  
Prins Reaction ◽  
Exchange Resins

Esterification of free fatty acids in waste cooking oils (WCO): Role of ion-exchange resins

Fuel ◽  
2008 ◽  
Vol 87 (10-11) ◽  
pp. 1789-1798 ◽  
Author(s):  
Nalan Özbay ◽  
Nuray Oktar ◽  
N. Alper Tapan
Keyword(s):  
Fatty Acids ◽  
Ion Exchange ◽  
Free Fatty Acids ◽  
Ion Exchange Resins ◽  
Waste Cooking Oils ◽  
Exchange Resins ◽  
Cooking Oils

scholarly journals New Resins for Ion Exchange Applications and a Process for Their Sustainable Regeneration

Substantia ◽  
2021 ◽  
pp. 33-37
Author(s):  
Tanita Gettongsong ◽  
Mojtaba Taseidifar ◽  
Richard M. Pashley
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Low Energy ◽  
Ion Exchange Resins ◽  
Closed Cycle ◽  
Membrane Process ◽  
Design And Synthesis ◽  
Salt Level ◽  
Anions And Cations ◽  
Exchange Resins

The report is concerned with the design and synthesis of a mixed bead resin for high salt level desalination. The resin allows for the simultaneous exchange of both anions and cations, within the same polymer. This improves the efficiency of desalination at seawater levels. A novel process for sustainable and low energy desalination for brackish water has already been achieved via ion exchange resins as explained below. The advance in resin technology improves a novel membrane process with closed–cycle regeneration of the resin.  It is a superior alternative to reverse osmosis.

Role of strong ion exchange resins in nitrosamine formation in water

1980 ◽  
Vol 14 (7) ◽  
pp. 869-876 ◽  
Author(s):  
W KIMOTO ◽  
C DOOLEY ◽  
J CARRE ◽  
W FIDDLER
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Exchange Resins

Approximate cost of the elimination of boron in desalinated water by reverse osmosis and ion exchange resins

Desalination ◽  
2011 ◽  
Vol 273 (2-3) ◽  
pp. 421-427 ◽  
Author(s):  
María Fernanda Chillón Arias ◽  
Laureano Valero i Bru ◽  
Daniel Prats Rico ◽  
Pedro Varó Galvañ
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Ion Exchange Resins ◽  
Desalinated Water ◽  
Exchange Resins ◽  
Approximate Cost

scholarly journals Reaction products from N-methyl-N-nitrosourea and deoxyribonucleic acid containing thymidine residues. Synthesis and identification of a new methylation product, O4-methyl-thymidine

1973 ◽  
Vol 135 (1) ◽  
pp. 193-201 ◽  
Author(s):  
P. D. Lawley ◽  
D. J. Orr ◽  
S. A. Shah ◽  
P. B. Farmer ◽  
M. Jarman
Keyword(s):  
Ion Exchange ◽  
Mass Spectroscopy ◽  
Deoxyribonucleic Acid ◽  
Ion Exchange Resins ◽  
Reaction Products ◽  
Methylation Product ◽  
Exchange Resins ◽  
Dna 2

1. DNA was treated with N-methyl-N-nitrosourea at pH7–8, 37°C, degraded to yield 3- and 7-methylpurines and deoxyribonucleosides and the reaction products were separated by chromatography on ion-exchange resins. The following methods for identification and determination of products were used: with unlabelled N-methyl-N-nitrosourea, u.v. absorption; use of methyl-14C-labelled N-methyl-N-nitrosourea and use of [14C]thymine-labelled DNA. 2. The synthesis of O4-methylthymidine and its identification by u.v. and mass spectroscopy are reported. 3. 3-Methylthymidine and O4-methylthymidine were found as methylation products from N-methyl-N-nitrosourea with thymidine and with DNA, in relatively small yields. Unidentified products containing thymine were found in enzymic digests of N-methyl-N-nitrosourea-treated DNA, which may be phosphotriesters. 4. The possible role of formation of methylthymines in mutagenesis by N-methyl-N-nitrosourea is discussed.

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