Great Wall GR-20TEx Explosion-Proof Fractional Distillation Reactor

Overview

The Great Wall GR-20TEx Explosion-Proof Fractional Distillation Reactor is an integrated, bench-to-pilot-scale glass reactor system engineered for safe, precise, and reproducible synthesis, distillation, and reflux operations under vacuum or inert atmosphere—particularly where flammable solvents (e.g., diethyl ether, acetone, hexane, THF) or volatile organic compounds are involved. Built upon the proven thermal and chemical stability of DIN ISO 3585-compliant borosilicate glass 3.3, the system combines a 20 L reaction vessel with a dedicated 700 mm × Φ85 mm packed distillation column (filled with glass Raschig rings), jacketed temperature control, and intrinsically safe actuation throughout. Its Ex d IIB T4 Gb certification—validated per IEC 60079-0 and harmonized with ATEX Directive 2014/34/EU—ensures compliance for use in Zone 1 hazardous areas, making it suitable for pharmaceutical process development, fine chemical synthesis, and academic research labs operating under strict occupational safety and GLP-aligned protocols.

Key Features

• Full-system explosion protection: Ex d IIB T4 Gb-rated motor, explosion-proof control cabinet, certified junction boxes, and intrinsically safe instrumentation—all backed by traceable third-party certification (CNEX or equivalent).
• Borosilicate glass 3.3 construction: Complies with ISO 3585; withstands thermal shock (ΔT ≤80 °C), chemical corrosion (including strong acids/bases at moderate concentrations), and mechanical stress across −80 °C to +200 °C.
• Vacuum-compatible design: Rated for continuous operation from −0.1 MPa (absolute ~0.01 bar) to atmospheric pressure; all seals, valves, and joints tested to ISO 2859-1 sampling plans for leak integrity.
• Optimized distillation architecture: 700 mm × Φ85 mm fractionation column with uniform glass Raschig ring packing; manual reflux ratio control enables method development for boiling point separation, azeotrope breaking, or solvent recovery.
• Corrosion-resistant mechanical assembly: SUS304 stainless steel frame with PTFE-sheathed stirrer shaft, paddle impeller with solid PTFE blades, and zero-holdup side discharge valve featuring PTFE-lined ceramic core.
• Precision thermal management: Double-jacketed vessel (6 L capacity) connected via flexible stainless steel insulated hoses to external circulators; Pt100 sensor (IEC 60751 Class B) with PTFE insulation ensures stable, calibrated temperature feedback within ±0.1 °C.
• Operational flexibility: Frequency-controlled stirring (50–500 rpm), six standardized NS29/32 ports on lid for condenser, thermometer, addition funnel, gas inlet, vacuum line, and optional pH or conductivity probe.

Sample Compatibility & Compliance

The GR-20TEx accommodates a broad range of organic, inorganic, and organometallic reaction mixtures—including those involving halogenated solvents, lithium aluminum hydride suspensions, Grignard reagents, and catalytic hydrogenation precursors—provided compatibility with borosilicate glass and PTFE is confirmed. It meets structural and safety requirements outlined in ISO 14001 (environmental management), OSHA 1910.119 (process safety management), and EU Machinery Directive 2006/42/EC. All electrical components comply with IEC 60079-1 for flameproof enclosures and bear CE marking with Notified Body identification. Documentation includes Factory Acceptance Test (FAT) reports, material certifications (EN 10204 3.1), and full traceability of explosion-proof component certifications.

Software & Data Management

While the base GR-20TEx operates via analog/digital front-panel controls, optional integration with Great Wall’s GW-Link™ Lab Control Suite (v3.2+) enables centralized monitoring of temperature, stirring speed, vacuum level, and reflux timing. The software supports audit-trail-enabled data logging compliant with FDA 21 CFR Part 11 (electronic signatures, user-level access control, immutable records), as well as export to CSV, PDF, and XML formats for LIMS or ELN ingestion. All firmware updates undergo IEC 62443-3-3 SL2 validation, and system configuration files are digitally signed to prevent unauthorized modification.

Applications

• Development and optimization of batch distillation processes for solvent recycling or product purification in API manufacturing.
• Synthesis of moisture- and oxygen-sensitive intermediates under nitrogen or argon blanket with simultaneous fractional removal of low-boiling byproducts.
• Thermal stability studies of energetic materials or peroxide-forming compounds under controlled vacuum and temperature ramping.
• Educational demonstration of vapor–liquid equilibrium, relative volatility, and theoretical plate efficiency in chemical engineering laboratories.
• Small-volume production of high-value specialty chemicals (e.g., chiral catalysts, photoresist monomers) requiring strict exclusion of metal contamination.

FAQ

What hazardous area classification does the GR-20TEx support?

It is certified Ex d IIB T4 Gb for use in Zone 1 (gas/vapor) environments per IEC 60079-0 and EN 60079-1. T4 indicates a maximum surface temperature of ≤135 °C under fault conditions.

Can the system be operated under positive pressure?

No—the vessel is rated only for vacuum to atmospheric pressure (−0.1 to 0.0 MPa gauge). Positive pressure operation requires alternative reactor configurations with reinforced glass or metal vessels.

Is the distillation column removable for cleaning or replacement?

Yes—the column connects via standard ISO KF25 vacuum flanges and can be detached without tools; Raschig rings are accessible through the top port for inspection or replacement.

Does the system include documentation required for regulatory audits?

Yes—each unit ships with a complete Dossier including EC Declaration of Conformity, explosion-proof component certificates, material test reports, FAT summary, and calibration records for Pt100 and pressure sensors.

What maintenance intervals are recommended for the mechanical seal and bearings?

Under normal operation (≤8 hrs/day, non-abrasive media), inspect the seal every 6 months; replace bearings and O-rings every 24 months or after 5000 operational hours—whichever occurs first.