Binzhenghong PFA Pear-Shaped Separatory Funnel with Integrated HF-Resistant Condensation & Reflux Assembly (250 mL / 500 mL)

Overview

The Binzhenghong PFA Pear-Shaped Separatory Funnel with Integrated HF-Resistant Condensation & Reflux Assembly is a purpose-engineered laboratory system designed for safe, high-integrity handling of hydrofluoric acid (HF), fluorinated reagents, and other highly aggressive media in synthesis, purification, and analytical sample preparation. Constructed entirely from high-purity perfluoroalkoxy alkane (PFA), the system eliminates metallic or glass interfaces that would otherwise corrode, leach, or fail under HF exposure. Unlike conventional glass or borosilicate reflux setups, this assembly leverages PFA’s exceptional chemical inertness (resistant to HF, hot concentrated HNO₃, aqua regia, and molten alkali metals), low extractables, and thermal stability up to 260 °C. The pear-shaped separatory funnel geometry ensures efficient phase separation and controlled draining—critical for liquid–liquid extractions involving density-sensitive fluorinated solvents (e.g., FC-72, perfluoromethylcyclohexane). When integrated with the optional PFA condenser (straight or coiled), constant-volume reflux is maintained without pressure buildup, enabling stoichiometric control and reproducible reaction kinetics in closed-system HF chemistry.

Key Features

• Full-body PFA construction—no adhesives, metal springs, or glass components—ensuring zero contamination and full compatibility with hydrofluoric acid at concentrations up to 49% and temperatures up to 120 °C.
• Pear-shaped separatory funnel design with calibrated volume markings (±1% tolerance), precision-machined PFA stopcock (PTFE-sealed, non-lubricated), and ergonomic PFA handle for tactile control during manual phase separation.
• Modular, standardized ground-glass-equivalent PFA joints (19/24 standard taper) compatible with existing PFA or quartz labware; all connections utilize threaded PFA-to-PFA couplings with O-ring compression seals.
• Integrated reflux capability via interchangeable PFA condensers: straight-tube (for low-boiling solvents) or spiral-coil (enhanced surface area, >3× heat transfer efficiency vs. straight tube) with optional PFA filler spheres (3–5 mm Ø) to increase condensation path length.
• Multi-neck PFA round-bottom flasks (250–2000 mL) available with 1–6 standardized necks (19#, 24#, or 29# taper), enabling simultaneous attachment of funnel, condenser, thermometer sleeve, gas inlet, and mechanical stirrer—all in PFA.
• Autoclavable (121 °C, 15 psi, 20 min) and suitable for Class 100 cleanroom use; certified per ASTM D1600 for fluoropolymer purity and USP for extractables profile.

Sample Compatibility & Compliance

This system is validated for use with hydrofluoric acid, ammonium bifluoride, fluorosulfuric acid, anhydrous hydrogen fluoride, and fluorinated organic solvents—including but not limited to perfluoroheptane, perfluorotributylamine, and fluorinated ethers. It complies with ISO 17025 calibration traceability requirements when used with NIST-traceable volumetric standards. All PFA components meet FDA 21 CFR §177.1550 for repeated-use food-contact fluoropolymers and are fully compatible with GLP/GMP environments requiring documented material traceability. No leachable fluorides or metal ions (<0.1 ppb by ICP-MS) are detected after 72-hour immersion in 48% HF at 80 °C—verified via internal QC testing reports (available upon request).

Software & Data Management

While inherently analog (no embedded electronics), the system supports digital workflow integration via third-party platforms: PFA flask necks accept standard digital temperature probes (e.g., Omega HH309A) and magnetic stirrer controllers (e.g., IKA RCT basic) with PFA-sheathed shafts. Optional RFID-tagged PFA labels (IP68-rated, HF-stable) enable asset tracking and audit trail generation within LIMS systems compliant with 21 CFR Part 11. Batch records, cleaning logs, and usage history can be associated with each uniquely serialized PFA component using QR-coded identification plates laser-etched directly onto the polymer surface.

Applications

• Synthesis and purification of fluorinated pharmaceutical intermediates (e.g., ¹⁸F-radiolabeling precursors) under anhydrous HF conditions.
• Extraction of rare-earth elements from acidic leachates using HF-based solvent systems (e.g., D2EHPA in FC-72).
• High-purity etchant recycling in semiconductor wet benches—recovering and concentrating spent HF/NH₄F mixtures via fractional distillation in PFA reflux loops.
• Stabilization studies of LiPF₆ electrolytes in lithium-ion battery R&D, where trace HF must be quantified and removed without introducing silicate or borosilicate interference.
• Preparation of ultra-low-background standards for accelerator mass spectrometry (AMS), where sub-ppt metal contamination is unacceptable.

FAQ

Can this PFA separatory funnel be used with vacuum or positive pressure?
Yes—rated for continuous operation from –0.1 MPa (full vacuum) to +0.3 MPa at 25 °C; pressure rating decreases linearly to +0.1 MPa at 150 °C per ASTM F726.
Is thermal shock resistance comparable to borosilicate glass?
No—PFA has lower thermal conductivity and higher CTE than glass; rapid ΔT >50 °C is discouraged. Preheat/cool uniformly at ≤5 °C/min.
Do you offer custom neck configurations or non-standard tapers?
Yes—custom PFA machining (including 14/20, 29/32, and metric M24×1.5 threads) is available with lead time of 4–6 weeks and MOQ of 5 units.
How is cleaning validated for HF residue removal?
We recommend sequential rinses with deionized water → 5% NaOH (aq) → DI water → 100% ethanol, followed by bake-out at 120 °C for 2 h; residual fluoride is verified by SPADNS colorimetry (LOD: 0.02 ppm).
Are certificates of conformance and material test reports provided?
Yes—each shipment includes CoC per ISO 9001:2015, extractables report (per USP ), and batch-specific HF corrosion resistance data (ASTM D543 immersion test results).