Annular Centrifugal Extractor
The CTX Series is a compact centrifugal extractor designed for continuous or semi-continuous liquid–liquid extraction and phase separation. It integrates annular high-shear micro-mixing (Taylor-Couette vortices) and high-G centrifugal separation in a single unit, enabling fast mass transfer, stable phase split and low solvent hold-up.
It is widely used in fine chemicals, pharmaceutical intermediates, hydrometallurgy/lithium systems, fermentation-derived products, and any application where conventional mixer-settlers become bulky and slow.
Best for: low density-difference systems, emulsion-prone feeds, and processes requiring short residence time.
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Key Features:
Key Feature 1 — Process Intensification (High Mass Transfer)
Annular micro-mixing creates high interfacial area for fast extraction in a compact footprint.
Key Feature 2 — Stable Phase Separation (High-G Force)
High centrifugal field quickly splits light/heavy phases and helps reduce rag layer build-up.
Key Feature 3 — Short Residence Time
Minimizes degradation of heat-/time-sensitive products (APIs, intermediates).
Key Feature 4 — Low Hold-Up & Solvent Inventory
Small internal liquid volume reduces solvent cost, safety risk and start-up waste.
Key Feature 5 — Flexible Materials for Corrosive Media
Wetted parts available in SS316L, Duplex/904L, Hastelloy, Titanium, or fluoropolymer lining/coating.
Key Feature 5 — Easy Integration / Multi-Stage Expansion
Single unit operation or multi-stage series integration for counter-current or cross-flow extraction.
Key Feature 5 — Closed & Safer Operation (Optional)
N₂ blanketing, leak detection and interlocks available for solvent handling and GMP-oriented production.
Process Characteristics:
CTX combines two critical steps in one machine:
Mixing & mass transfer in the annular gap via Taylor-Couette vortices (high-frequency micro-mixing).
Two-phase separation under high-G force with interface control by weirs/flow balance.
This “system-in-a-box” concept reduces external inter-stage pumps and complex piping compared with mixer-settler trains, improving operational stability and lowering CapEx/Opex.
Typical Industries & Applications:
Fine chemical synthesis: quench + extraction, impurity removal, solvent recovery loops
Pharmaceuticals: API/intermediate washing, extraction under GMP requirements
Hydrometallurgy & lithium: metal ion extraction circuits, brine-related separations
New materials: precursor purification for battery materials
Fermentation / biotech: solvent extraction of bio-based products (case dependent)
Working Principle (Step-by-step):
Step 1 – Feeding & Ratio Control
Light and heavy phases are fed into the mixing chamber according to the required phase ratio.
Step 2 – Annular Micro-Mixing (Mass Transfer)
Rotor rotation generates Taylor vortices in the annular gap, dispersing phases and transferring solute from feed phase to extractant phase.
Step 3 – Centrifugal Separation
The dispersion enters the separation zone; high-G force rapidly separates the two phases based on density difference.
Step 4 – Interface & Weir Control
Weir settings (and optional automatic control) stabilize the interface position to ensure clean light/heavy phase outlets.
Step 5 – Continuous Discharge
Extract and raffinate are discharged continuously for stable operation.
Configuration Options:
| Product Name | Item | Standard configuration | Optional configuration |
| CTX Series - Annular Centrifugal Extractor (High-Performance) | Wetted parts material | Anti-corrosion stainless steel for drum, screw and wetted piping | Special alloys (Duplex, 904L, Hastelloy, titanium), rubber or fluoropolymer lining for strong acid / alkali / chloride systems |
| Mixing & separation internals | Standard annular mixing chamber with radial turbine wheel, single-stage separation zone | Customized impeller geometry for high-viscosity or high phase-ratio systems, multi-stage arrangement in one housing | |
| Drive & control | Horizontal motor with belt drive, fixed-speed operation | VFD speed control, automatic torque or differential-speed regulation, automatic feed and level control, skid-mounted control panel | |
| Process connections | Flanged process nozzles for feed, extract and raffinate; basic sampling ports | Heated jackets, additional sampling points, online density / conductivity analyzers, solvent-recovery condensers | |
| Cleaning & flushing | Manual flushing via service nozzles | CIP spray ball system, quick-change seals, steam-heating for hot caustic or detergent cleaning |
Technical_Specs:
| CTX Series - Annular Centrifugal Extractor (High-Performance) | Model | Rotor Diameter (mm) | Hydraulic Capacity (L/h) | Motor Power (kW) | Inlet/Outlet Size (mm) | Rotational Speed (rpm) | Separation Factor (G) | Net Weight (kg) | Dimensions (L×W×H) (mm) |
| CTX50-N | 50 | 2–100 | 0.08–0.1 | 15 | 5600 | 875 | 50 | 340×280×760 | |
| CTX150-N | 150 | 100–1000 | 0.5–1 | 25 | 2900 | 705 | 250 | 500×500×1150 | |
| CTX250-N | 250 | 1000–3000 | 1–2 | 50 | 2500 | 870 | 700 | 725×725×1750 | |
| CTX350-N | 350 | 3000–8000 | 2–4 | 80 | 1800 | 630 | 1200 | 910×910×2150 | |
| CTX450-N | 450 | 7000–15000 | 4–7.5 | 80 | 1500 | 565 | 1500 | 1100×1100×2250 | |
| CTX550-N | 550 | 12000–30000 | 7–11 | 100 | 1500 | 690 | 2000 | 1300×1300×2750 | |
| CTX650-N | 650 | 25000–40000 | 11–15 | 125 | 1500 | 815 | 2500 | 1500×1500×2950 | |
| CTX800-N | 800 | 30000–60000 | 15–22 | 150 | 1000 | 447 | 4500 | 1800×1800×3100 | |
| CTX1000-N | 1000 | 50000–100000 | 18–25 | 150 | 800 | 357 | 6000 | 2100×2100×3800 |
Technical_Specs:
