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Chemical Structure| 17465-86-0 Chemical Structure| 17465-86-0
Chemical Structure| 17465-86-0

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CAS No.: 17465-86-0

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γ-Cyclodextrin is an endogenous metabolite.

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Product Citations

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Lienhart, Gavan W ; Palisin, Thomas ; Gross, William ; Moll, Amelia ; Eagan, James M ;

Abstract: The separation of (PET) comonomers produced from the chemical recycling and depolymerization of PET is a critical step in realizing polyester material circularity. Various grades of PET (e.g., fiber, bottle, tire-cord) each require precise degrees of crystallinity which is controlled by the introduction of isomeric phthalates, comonomers which then contaminate secondary monomer streams. The use of supramolecular interactions as a method of extracting and separating these comonomers is herein described. The binding constants (Kb) between various-sized cyclodextrins with / and bis-2-hydroxyethyl terephthalate/bis-2-hydroxyethyl isophthalate are measured by fluorescence quenching and titration measurements. It is shown that betacyclodextrins most favorably bind the monomers (Kb up to 830 M?1) and that methyl ester comonomers bind more strongly than the glycolysis products. Competitive binding measurements between isomeric aromatic esters indicate binds (Kb = 328 M?1) 6-times more strongly than the (Kb = 55 M?1). Crosslinking of the cyclodextrins with diisocyanate or perfluorinated bis-cyanobenzene moieties resulted in particles that could effectively remove the monomers from depolymerization solutions (up to 0.6 mmol of monomer per gram of particle). The results suggest supramolecular extraction and separation may be a scalable means of improving the purity and atom recovery of secondary recycled polyester feedstocks.

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Product Details of γ-Cyclodextrin

CAS No. :17465-86-0
Formula : C48H80O40
M.W : 1297.12
SMILES Code : O[C@@H]1[C@H]([C@@H]2O[C@@H]3[C@@H]([C@H]([C@@H]([C@H](O3)CO)O[C@H]4[C@H]([C@@H]([C@H]([C@@H](O4)CO)O[C@H]5[C@H]([C@@H]([C@H]([C@@H](O5)CO)O[C@H]6[C@H]([C@@H]([C@H]([C@@H](O6)CO)OC(O[C@H]7CO)[C@@H](O)[C@H](O)[C@H]7O[C@H](O[C@H]8CO)[C@@H](O)[C@H](O)[C@H]8O[C@@H](O[C@@H]9CO)[C@H](O)[C@@H](O)[C@@H]9O[C@H]1O[C@@H]2CO)O)O)O)O)O)O)O)O)O
MDL No. :MFCD00009595

Safety of γ-Cyclodextrin

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338
 

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