Ethylene Glycol → Dimethyl terephthalate

HRID 2286607Notes

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 380.5%

Procedure

A polyester produced in known manner from 353 g of dimethyl terephthalate, 153 g of ethylene glycol and 88 g glycerin is heated to 80° C. with the addition of 52 g of cresol. After the further addition of 200 g of trimellitic acid anhydride and 103 g of 4,4'-diaminodiphenylmethane the reaction mixture is further heated, whereby at a temperature of 140° C. the diimidodicarboxylic acid of Example A separates. After further temperature increase esterification occurs at 215° C., until the resin becomes clear. After the addition of 350 g of technical cresol the mixture is cooled to 80° C.

Sources & evidence

ORD record: ord-96e9b0832b3041e38838d4a55053fe43
Source dataset: uspto-grants-1981_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04267232

Reaction notes

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