Adipic Acid → Adipic Acid

HRID 579685Notes

Reaction equation

HRID 579685 reaction equation
[CH2:1](O)[CH:2](O)C.[C:6]([OH:15])(=[O:14])[CH2:7][CH2:8][CH2:9][CH2:10][C:11]([OH:13])=[O:12]>>[C:6]([OH:15])(=[O:14])[C:7]1[CH:2]=[CH:1][C:10]([C:11]([OH:13])=[O:12])=[CH:9][CH:8]=1.[C:6]([OH:15])(=[O:14])[CH2:7][CH2:8][CH2:9][CH2:10][C:11]([OH:13])=[O:12]

Participants

4

Reactant 2

HCID 196Adipic AcidHCID 1030Propylene Glycol

Product 2

HCID 196Adipic AcidHCID 7489Terephthalic Acid

Procedure

1,2-propylene glycol, terephthalic acd, adipic acid, and trilmellitic anhydride were placed in a reaction container equipped with a condenser, a stirrer, and a nitrogen-introducing tube in such a manner that the molar ratio ([OH]/[COOH]) of a hydroxy group to a carboxylic group was 1.3. Dicarboxylic acid was formed of 80% by mol of terephthalic acid and 20% by mol of adipic acid. Trilmellitic anhydride was set to be 2.5% by mol to the total of monomers. 1,000 ppm of titanium tetraisopropoxide was added to all of the monomers. Next, the system was heated to 200° C. in about four hours and to 230° C. in two hours and reacted until effluent water became nil. Furthermore, the reaction was continued with a reduced pressure of from 10 mmHg to 15 mmHG for five hours to obtain a polyester having a hydroxy group.

Workup

  1. customequipped with a condenser, a stirrer
  2. additiona nitrogen-introducing tube in such a manner that the molar ratio ([OH]/[COOH]) of a hydroxy group to a carboxylic group

Sources & evidence

ORD record
ord-dca49b523daa440da6509983697c8694
Source dataset
uspto-grants-2015_05
Patent number
US09042802B2

Reaction notes

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