Hydrolysis of Dimethyl Terephthalate for the Production of Terephthalic Acid

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.

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Absorption, Distribution and Excretion of Terephthalic Acid and Dimethyl Terephthalate

AIHAJ ◽

10.1080/0002889758507303 ◽

1975 ◽

Vol 36 (8) ◽

pp. 633-641 ◽

Cited By ~ 19

Author(s):

A. E. MOFFITT ◽

J. J. CLARY ◽

T. R. LEWIS ◽

M. D. BLANCK ◽

V. B. PERONE

Keyword(s):

Terephthalic Acid ◽

Dimethyl Terephthalate

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Hydrolysis of waste polyethylene terephthalate catalyzed by easily recyclable terephthalic acid

Waste Management ◽

10.1016/j.wasman.2021.09.009 ◽

2021 ◽

Vol 135 ◽

pp. 267-274

Author(s):

Weisheng Yang ◽

Rui Liu ◽

Chang Li ◽

Yang Song ◽

Chaoquan Hu

Keyword(s):

Polyethylene Terephthalate ◽

Terephthalic Acid ◽

Waste Polyethylene ◽

Hydrolysis Of

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Oxidation of p–xylene to terephthalic acid in benzoic acid and methyl ester of p–toluic acid

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19872241 ◽

1987 ◽

Vol 52 (9) ◽

pp. 2241-2247 ◽

Cited By ~ 2

Author(s):

Milan Hronec ◽

František Masarovič ◽

Zuzana Cvengrošová ◽

Ján Ilavský

Keyword(s):

Methyl Ester ◽

Benzoic Acid ◽

Terephthalic Acid ◽

Cobalt Catalyst ◽

Peroxy Radicals ◽

Pyridine Ligands ◽

Hydrolysis Of

The oxidation of p-xylene to terephthalic acid has been studied at 130 to 190 °C, using benzoic acid and methyl ester of p-toluic acid as the solvent. It was found that the solvent affects strongly the activity of the cobalt catalyst which effect is dependent on the presence of bromide and pyridine ligands. In the methyl ester of p-toluic acid as the solvent, cobalt-bromide catalysts induce also hydrolysis of the methyl ester which proceeds parallelly to the oxidation of p-xylene. The activating effect of bromide and pyridine ligands results from their effect on the rate of the reaction of peroxy radicals with the catalyst in the propagation step and from their effect on the rate of consecutive oxidation of p-toluic acid to terephthalic acid.

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