Three-Column Train
Divided-Wall Column
Side-Draw Control
Amines Separation
Commercial flowsheet for aniline, cyclohexylamine (CHA), and dicyclohexylamine (DCHA): two conventional columns for aniline and CHA, followed by a divided-wall column (DWC) with a controlled side-draw to produce high-purity DCHA.
2025
Commissioned
Commissioned
≥ 99.7%
CHA purity
CHA purity
≥ 99.8%
DCHA purity
DCHA purity
Flowsheet Overview
- Column 1 — Aniline: Recovery and purification.
- Column 2 — CHA: Cyclohexylamine product column.
- Column 3 — DWC: Divided-wall column with side-draw for DCHA; internal partition reduces remixing and improves energy use.
Performance
- CHA ≥ 99.7 wt.% (typ.)
- DCHA ≥ 99.8 wt.% (typ.)
- Robust start-up and turndown; straightforward train integration