Glycerol → Trimellitic anhydride

HRID 2287112Notes

Reaction equation

HRID 2287112 reaction equation
[C:1]([OH:12])(=[O:11])[C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][CH:3]=1.[OH:13][CH2:14]C(CO)O.C([O-])(=O)C.[Pb+2].C([O-])(=O)C>CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-].[Ti+4]>[CH:9]1[C:5]([C:6]([OH:8])=[O:7])=[CH:4][C:3]2[C:14]([O:11][C:1](=[O:12])[C:2]=2[CH:10]=1)=[O:13]

Participants

5

Reactant 3

HCID 753GlycerolHCID 7489Terephthalic AcidHCID 9317Lead diacetate

Product 1

HCID 11089Trimellitic anhydride

Reagents, catalysts & solvents 1

HCID 21801Titanium tetrabutoxideCatalyst

Procedure

380 g of a terephthalic acid polyester of 1.0 mol of terephthalic acid, 0.38 mol of glycerol and 0.72 mol of glycol containing approximately 6.0% by weight of hydroxyl groups and catalytic quantities of lead acetate and butyl titanate are then introduced one after another and stirred homogeneously into the reaction mixture. After condensation for one hour at 170° C., 2 hours at 200° C. and 2 hours at 220° C.,

Workup

  1. customAfter condensation for one hour at 170° C.
  2. custom2 hours
  3. customat 200° C.
  4. custom2 hours
  5. customat 220° C.

Sources & evidence

ORD record
ord-0dad8a23531a4b3db10c1ab454f464bf
Source dataset
uspto-grants-1981_05
Patent number
US04269750

Reaction notes

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