Ethylene Glycol → Dimethyl terephthalate

HRID 426643Notes

Reaction equation

[CH2:1]([OH:4])[CH2:2]O.O[CH2:6][CH:7]([CH2:9][OH:10])O>>[C:9]([O:10][CH3:1])(=[O:10])[C:7]1[CH:6]=[CH:7][C:2]([C:1]([O:4][CH3:2])=[O:4])=[CH:9][CH:6]=1

Participants

Reactant 2

HCID 174Ethylene Glycol

HCID 753Glycerol

Product 1

HCID 8441Dimethyl terephthalateYield 490.7%

Procedure

A polyester is produced in known manner from 388 g of dimethyl terephthalate, 112 g of ethylene glycol and 75 g of glycerin, and mixed with 204 g of the reaction product of Example A at a temperature of 180°-215° C. in two portions. After the diimidodicarboxylic acid (of Example A) is completely taken up in the terephthalate resin, 1.0 g of cadmium acetate is added thereto and the reaction mixture is further condensed for 3 hours at 215° C., finally under vacuum. The obtained resin is dissolved in 450 g of technical cresol while still hot, and mixed with a solution of 9 g of butyl titanate in 27 g of cresol.

Sources & evidence

ORD record: ord-17da1b84067c4a32acd606244188fb5d
Source dataset: uspto-grants-1979_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04170684

Reaction notes

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