The formation of p-toluic acid from coumalic acid: a reaction network analysis

2017 ◽  
Vol 19 (14) ◽  
pp. 3263-3271 ◽  
Author(s):  
Toni Pfennig ◽  
Robert L. Johnson ◽  
Brent H. Shanks
Keyword(s):  
Network Analysis ◽  
Polyethylene Terephthalate ◽  
Terephthalic Acid ◽  
Alternative Pathway ◽  
Reaction Network ◽  
Diels Alder

Diels–Alder cycloaddition of biomass-derived 2-pyrone coumalic acid (CMA) with propylene provides an alternative pathway to produce toluic acid (TA), a precursor to terephthalic acid (TPA) which is a key component in the manufacture of polyethylene terephthalate (PET).

scholarly journals Cover Feature: Reaction Network Analysis of the Ruthenium‐Catalyzed Reduction of Carbon Dioxide to Dimethoxymethane (ChemCatChem 12/2021)

ChemCatChem ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2746-2746
Author(s):  
Max Leopold ◽  
Max Siebert ◽  
Alexander F. Siegle ◽  
Oliver Trapp
Keyword(s):  
Carbon Dioxide ◽  
Network Analysis ◽  
Reaction Network

Kinetics of the reaction of polyethylene terephthalate with diphenyl ester of terephthalic acid

1977 ◽  
Vol 9 (1) ◽  
pp. 30-33
Author(s):  
V. V. Shevchenko ◽  
L. P. Repina ◽  
�. M. Aizenshtein ◽  
T. A. Polyakova
Keyword(s):  
Polyethylene Terephthalate ◽  
Terephthalic Acid ◽  
Kinetics Of

Effects of Temperature on Catalytic Hydrolysis of PET by Zinc Sulfate under Microwave Irradiation

2011 ◽  
Vol 233-235 ◽  
pp. 1628-1631 ◽  
Author(s):  
Qing Hua Tang ◽  
Yong Shuai Ma ◽  
Dong Zhang
Keyword(s):  
Microwave Irradiation ◽  
Polyethylene Terephthalate ◽  
Reaction Temperature ◽  
Terephthalic Acid ◽  
Zinc Sulfate ◽  
Influencing Factor ◽  
Catalytic Hydrolysis ◽  
Different Temperatures ◽  
Effects Of Temperature ◽  
Hydrolysis Of

The effects of different temperatures on catalytic hydrolysis of polyethylene terephthalate(PET) by zinc sulfate as a catalyst under microwave irradiation were studied, and in the meantime, the relation between the depolymerization rate of PET and the yield of terephthalic acid(TPA) under the same temperature was investigated. The results suggested that the reaction temperature was an important influencing factor for the depolymerization reaction of PET, and the concentration of depolymerization product TPA and the depolymerization rate of PET became coherence under the same temperature.

Liquid Chromatographic Determination of Residual Reactants and Reaction By-Products in Polyethylene Terephthalate

1989 ◽  
Vol 72 (3) ◽  
pp. 468-470 ◽  
Author(s):  
Timothy H Begley ◽  
Henry C Hollifield
Keyword(s):  
Polyethylene Terephthalate ◽  
Terephthalic Acid ◽  
Chromatographic Determination ◽  
Cyclic Trimer ◽  
Food Packages ◽  
Precipitation Procedure ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic ◽  
By Products

Abstract A precipitation procedure and liquid chromatography (LC) were used to measure the residual reactants and reaction by-products in polyethylene terephthalate (PET) polymers and food packages. The polymer is dissolved in l,l,l,3,3,3-hexafluoro-2-propanol/methyIene chloride and then precipitated with acetone. The filtered solution is evaporated almost to dryness, and the concentrate is diluted with dimethylacetamide for LC analysis. Recoveries for terephthalic acid (TA), bis(2-hydroxyethyl) terephthalate (BHET), and the PET cyclic trimer averaged 95,104, and 98%, respectively. The residual levels of TA, BHET, monohydroxy ethylene terephthalic acid, and the PET cyclic trimer were measured in commercial resins and food packages.

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