Ethylene Glycol → Dimethyl terephthalate

HRID 1655823Notes

Reaction equation

HRID 1655823 reaction equation
C(O)[CH2:2][OH:3].O.O.O.O.[C:9]([O-:12])(=[O:11])[CH3:10].[Mg+2].[C:14]([O-])(=O)C.O=[Sb]O[Sb]=O.C(C1C=[C:29](OC)[CH:30]=[C:31]([C:34]([CH3:37])(C)C)[C:32]=1[OH:33])(C)(C)C>O.O.O.O.C([O-])(=O)C.[Co+2].C([O-])(=O)C>[C:32]([O:3][CH3:2])(=[O:33])[C:31]1[CH:30]=[CH:29][C:10]([C:9]([O:12][CH3:14])=[O:11])=[CH:37][CH:34]=1

Participants

6

Reactant 4

HCID 174Ethylene GlycolHCID 102692,6-Di-tert-butyl-4-methoxyphenolHCID 27652Oxo(oxostibanyloxy)stibaneHCID 134717Magnesium Acetate Tetrahydrate

Product 1

HCID 8441Dimethyl terephthalate

Reagents, catalysts & solvents 1

HCID 61372Cobalt(II) acetate tetrahydrateCatalyst

Procedure

93.1 g(0.48 mol) of dimethyl terephthalate, 10.68 g(0.02 mol) of dimethyl 6,6'-(isophthaloyl-dioxy)-di-2,2'-naphthoate, 68.2 g(1.1 mol) of ethylene glycol were polymerized in the presence of 87 mg of magnesium acetate tetrahydrate and 34 mg of cobalt acetate tetrahydrate. At the temperature of 250° C., 45 mg of antimony trioxide and 300 mg of 3,5-di-tert.-butyl-4-hydroxy anisole were added. The resulting polymer had an intrinsic viscosity of 0.55 dl/g, a Tg of 81° C. and a Tm of 232° C.

Workup

  1. customa Tm of 232° C.

Sources & evidence

ORD record
ord-851e8a1ce1d0420aa79e9aebfb637288
Source dataset
uspto-grants-1993_10
Patent number
US05252282

Reaction notes

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