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Qingdao Conqinphi Environmental Technology Group Co., Ltd., a manufacturer established in 2015 with a production facility spanning 10,000–30,000 square meters, proudly presents our Double Distillation Equipment with Glass Condenser and PTFE Stopcock — engineered specifically for the production of high purity solvents. This distillation apparatus combines efficient double-stage distillation with durable borosilicate glass components and corrosion-resistant PTFE stopcocks, ensuring reliable separation and purification in demanding laboratory and industrial environments. Backed by our 201–300 skilled employees and annual export value of US$10–50 million, we deliver precision equipment that meets the rigorous standards of solvent purification processes.
Our double distillation system is designed to achieve ultra-high purity levels by subjecting the solvent to two successive distillation cycles within a single compact setup. The integrated glass condenser provides efficient cooling and condensation, while the PTFE stopcock offers smooth, leak-free control of distillate flow. This equipment is ideal for applications in pharmaceutical synthesis, analytical chemistry, electronics cleaning, and organic chemistry research where solvent purity directly affects product quality and safety.
Key Features & Technical Specifications
- Double stage design: Two distillation flasks in series enhance separation efficiency and remove trace impurities effectively.
- High-quality borosilicate glass: Withstands thermal shock and chemical attack; transparent for easy monitoring of distillation progress.
- PTFE stopcock: Non-stick, chemically inert, and resistant to high temperatures; provides precise flow regulation.
- Efficient glass condenser: Large surface area ensures rapid condensation of vapors, minimizing solvent loss.
- Standard taper joints (24/40 or 29/42): Secure connection and compatibility with common laboratory glassware.
- Adjustable heating mantle: Temperature control from ambient to 300°C (optional digital controller).
- Vacuum capability: Can be used under reduced pressure for lower boiling point solvents (PTFE stopcock maintains vacuum integrity).
- Modular design: Easy to disassemble for cleaning and maintenance.
Typical Technical Parameters
| Parameter | Specification |
|---|---|
| Total Volume (per stage) | 500 ml, 1000 ml, or 2000 ml |
| Condenser Type | Liebig or Allihn (glass coil) |
| Stopcock Material | PTFE with glass key |
| Working Pressure | Atmospheric or reduced (Vacuum) |
| Temperature Range | Up to 300°C (heating mantle) |
| Joint Size | 24/40 or 29/42 (customizable) |
| Net Weight | Approx. 3–5 kg per setup |
| Certifications | ISO9001, ISO14000, HACCP, TL900, QS9000, SA8000 and others (see our certificate list) |
Benefits for Your Application
- Enhanced Purity: The double distillation process removes more contaminants than single-stage units, ideal for HPLC-grade solvents.
- Reliable Operation: PTFE stopcock eliminates grease contamination and freezing common with glass stopcocks.
- Cost Efficiency: Reusable glass components reduce consumable costs; high condensation efficiency minimizes energy consumption.
- Safety: Borosilicate glass withstands thermal stress; all joints are standard taper for secure fitting without leaks.
- Flexibility: Suitable for a wide range of solvents (acetone, ethanol, methanol, toluene, etc.) due to chemical inertness of PTFE and glass.
Trusted Manufacturing Backed by Strong Data
Since our establishment in 2015, Qingdao Conqinphi has grown to a factory size of 10,000–30,000 m² and a workforce of 201–300 professionals. Our annual export value reaches US$10–50 million, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. We hold multiple certifications including ISO9001, ISO14000, HACCP, TL900, QS9000, SA8000, OHSAS18001, and others, reflecting our commitment to quality management, environmental responsibility, and occupational health. All equipment is thoroughly tested before shipment from Qingdao port. With a dedicated R&D team and strict quality control, we ensure every double distillation unit delivers consistent performance. Contact us today to discuss your specific solvent purification needs – we offer customization and OEM services.
Frequently Asked Questions (FAQ)
-
What is the difference between single and double distillation?
Double distillation uses two successive boiling/condensation cycles, achieving higher purity by removing more impurities and azeotropes. It is especially effective for solvents requiring -
Can this equipment handle corrosive solvents like chlorinated compounds?
Yes, borosilicate glass and PTFE are chemically resistant to most organic solvents and acids. However, avoid strong bases that attack glass. -
Is the heating mantle included?
The basic set includes the glassware, condenser, and stopcock. Heating mantle and temperature controller are optional and can be added upon request. -
What volume options are available?
Standard volumes are 500 ml, 1000 ml, and 2000 ml per flask. Custom sizes can be manufactured with a minimum order quantity. -
How do I clean the PTFE stopcock?
Disassemble and clean with mild detergent and soft brush. PTFE can be wiped with solvent; avoid abrasive scrubbers. -
Does the set include joints and clamps?
Yes, all taper joints are included, but additional support stands, clamps, and tubing are not part of the standard package. We can supply them as accessories. -
Can I use it under vacuum?
Absolutely. The PTFE stopcock seals well under vacuum. Ensure all joints are properly greased with silicone grease (or use PTFE sleeves) to maintain vacuum. -
What warranty do you offer?
We provide a 12-month warranty against manufacturing defects. Glass breakage due to misuse is not covered but spare parts are available.
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