Diethanolamine → 1,4-Piperazinediethanol

HRID 325024Notes

Reaction equation

HRID 325024 reaction equation
[NH:1]([CH2:5][CH2:6]O)[CH2:2][CH2:3][OH:4]>O>[OH:4][CH2:3][CH2:2][N:1]1[CH2:6][CH2:5][N:1]([CH2:2][CH2:3][OH:4])[CH2:6][CH2:5]1

Participants

3

Reactant 1

HCID 8113Diethanolamine2×

Product 1

HCID 671511,4-Piperazinediethanol

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

170.8 g of diethanolamine (1.63 mol) is added, and after 6 hours of reaction, 30 g of water that contains 2.3 g of diethanolamine is recovered. The residual acid index is equal to 1.4 mg of KOH/g of product, and the content of N,N′-bis (2-hydroxyethyl) piperazine that is obtained by chromatographic analysis is 2.8%. 448 g of product that can be used directly as is or after dilution that is aimed at appreciably reducing viscosity so that it can be handled easily is recovered in fine.

Workup

  1. customis recovered

Sources & evidence

ORD record
ord-cd84da77fa6e4e2796363100bb5ef80d
Source dataset
uspto-grants-2001_04
Patent number
US06221920B1

Reaction notes

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