Water → Dodecanedioic acid, compd. with 1,6-hexanediamine (1:1)

HRID 976216Notes

Reaction equation

HRID 976216 reaction equation
[C:1]1(=[O:8])[NH:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[NH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][C:21]([OH:23])=[O:22].[OH2:24]>>[CH2:16]([CH2:17][CH2:18][CH2:19][CH2:20][C:21]([OH:23])=[O:22])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2][C:1]([OH:8])=[O:24].[CH2:12]([CH2:11][CH2:10][NH2:9])[CH2:13][CH2:14][CH2:15][NH2:7]

Participants

4

Reactant 3

HCID 962WaterHCID 7768CaprolactamHCID 6966112-Aminododecanoic Acid

Product 1

HCID 83216Dodecanedioic acid, compd. with 1,6-hexanediamine (1:1)

Conditions

Temperature
260 °C

Procedure

An autoclave was charged with 5.0 kg of ε-caprolactam, 9.5 kg of 12-aminododecanoic acid and 1.0 kg of water, the temperature was increased gradually to 260° C. and then the internal pressure was adjusted to 4 kg/cm2 2 hours thereafter. After 2 hours of reaction at 260° C., generated steam was gradually removed, and the pressure was adjusted to atmospheric pressure and then to a reduced pressure for 1.5 hours of reaction, thereby obtaining a nylon 6/12 polymer.

Workup

  1. customwas adjusted to 4 kg/cm2 2 hours
  2. customAfter 2 hours of reaction at 260° C.
  3. customwas gradually removed
  4. customto a reduced pressure for 1.5 hours of reaction

Sources & evidence

ORD record
ord-fde7da531ab5427195931f09fcdf8734
Source dataset
uspto-grants-1997_03
Patent number
US05612105

Reaction notes

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