• Dean-Stark distillation receiver with 24/29 ground glass joints for water content measurement

Dean Stark Distillation Receiver

CH-D452410

  • Borosilicate

Vendor: SmartLabs

Suited For:

Country of Origin:

Low stock! Only 1 left
R 500.00
R 500.00
Tax included. Shipping calculated at checkout.
  • Fast Nationwide Delivery
  • 100% Quality Guaranteed
  • Reliable & Secure Payments

Have a question about this product?

Send us a message and we'll get back to you.

Dean Stark Distillation Receiver (also known as a Dean-Stark Trap) is a specialized piece of laboratory glassware used to continuously remove water or other liquid byproducts from a reaction mixture during reflux. This is commonly used in azeotropic distillation to drive chemical equilibria toward the product side, such as in esterification reactions. 

 
Core Function & Mechanism
The receiver works by distilling an azeotropic mixture (e.g., toluene and water). Once condensed, the two immiscible liquids separate in the trap based on their density: 
  • Phase Separation: The water (more dense) settles at the bottom of the graduated trap.
  • Recycling: The organic solvent (less dense) flows back into the reaction flask once the liquid level reaches the side-arm overflow.
  • Monitoring: The graduated scale allows for real-time measurement of the water produced, indicating when the reaction is complete. 
Key Components
  • Graduated Reservoir: A cylindrical tube used to measure the volume of the collected phase. Common capacities include 5mL, 10mL, and 25mL.
  • Stopcock: Usually a PTFE (Teflon) or glass tap at the bottom for easy draining of the collected water.
  • Joints: Typically features standard taper ground glass joints, with 24/29 being standard in many regions and 24/40 common in the US.
  • Vapour Tube: A side-arm that provides a path for vapours to travel from the boiling flask to the condenser. 
Common Applications
  • Organic Synthesis: Removing water byproducts in esterification or Schiff base synthesis to increase yield.
  • Moisture Determination: Quantitatively measuring the water content in petroleum products, food (like bread or fats), and oils.
  • Solvent Drying: Removing traces of water from solvents like toluene through azeotropic distillation. 
Comparison: Dean-Stark vs. Clevenger
While similar in appearance, their primary use differs: 
  • Dean-Stark: Primarily used to remove water as a waste byproduct or for moisture analysis.
  • Clevenger: Specifically designed for the extraction of essential oils, often featuring a return arm to recirculate the water (hydrosol) while trapping the oil.

 

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.