Used 22.5-Inch Silver Vacuum Jacketed Oldershaw Distillation Column

High-Resolution 1-Inch Bore Fractionator | Hybrid 35/25 & 50/32 Joints | Extreme Thermal Isolation

• Condition: Used (Fully Inspected & Vacuum Tested)

• Function: Fractional Distillation / High-Resolution Chemical Separation

• Scale: 22.5 Inches (571.5 mm) Overall Length

• Internal Capacity: 1-Inch (25.4 mm) Inside Diameter

• Insulation Profile: 2-Inch (50.8 mm) Outside Diameter with Silver Coating

• Joint Configuration: 35/25 Top Joint | 50/32 Spherical Ball Joint Bottom

• Thermal Protection: Silver-Coated Vacuum Jacket with Corrugated Expansion Bellows

Technical Overview: The High Efficiency Fractionator

When chemical processing workflows require the precise separation of liquid mixtures with closely related boiling points, standard mixing tubes or plain glass columns are insufficient. The Used 22.5-Inch Silver Vacuum Jacketed Oldershaw Distillation Column is a highly specialized piece of laboratory glassware engineered specifically for adult scientists conducting high resolution fractional distillation.

Unlike simple gravity mixing columns that rely on random internal protrusions, this true Oldershaw distillation column houses a precise series of perforated plates (trays) and downcomers. As hot vapor ascends the 22.5-inch (571.5 mm) vertical path, it bubbles through the descending liquid reflux on each successive plate, creating individual theoretical stages that maximize vapor-liquid equilibrium. To protect this delicate thermal process, the 1-inch internal bore is encased in a corrugated silver vacuum jacket equipped with expansion bellows. Featuring a unique hybrid joint configuration (35/25 top and 50/32 ball joint bottom), this pre-owned apparatus delivers uncompromising separation power and structural flexibility for custom glassware setups.

Technical Specifications

Core Engineering & Design Advantages

22.5-Inch High-Resolution Separation Path

The core advantage of an Oldershaw column is its ability to stack theoretical plates. The 22.5-inch length provides enough vertical distance for multiple vaporization-condensation cycles to occur simultaneously. As vapor moves upward from plate to plate, it becomes progressively richer in the more volatile component, allowing chemists to sharply divide complex solvent mixtures or purify target compounds that a shorter or unpacked column could not resolve.

Near-Adiabatic Stability via Silvered Jacketing

For the theoretical plates to function, the column must maintain a strict temperature gradient. If the vapor cools and condenses against the outer walls prematurely, the distillation collapses. The silver coating on the vacuum jacket acts as a thermal mirror, drastically reducing heat transfer by radiation. Combined with the deep vacuum layer that halts conductive heat loss, this thermal isolation ensures the internal 1-inch bore remains immune to ambient laboratory drafts.

Hybrid Joint Configuration (35/25 & 50/32 Ball)

This column features an asymmetrical joint setup designed for specialized integration:

• Top 35/25 Joint: Provides a secure connection for standard distillation heads, condensers, and reflux splitters.

• Bottom 50/32 Spherical Ball Joint: This oversized rounded base provides crucial alignment flexibility and angular deflection. When secured with a heavy duty pinch clamp, it allows the column to shift slightly under thermal stress, safely supporting the glassware on large capacity boiling flasks without placing catastrophic shearing stress on the connection.

Ideal Scientific Community Applications

This used, vacuum-jacketed fractionator is designed for stringent laboratory environments:

• Close Boiling Isomer Separation: Utilizing the internal plate count to sharply divide chemical components with nearly identical boiling points.

• Solvent Recovery & Purification: Distilling and purifying mid volume batches of contaminated laboratory solvents.

• High-Purity API Refinement: Achieving absolute purity in active pharmaceutical ingredients through controlled, thermally isolated fractional distillation.

• Process Scale-Up & Method Development: Serving as a highly visible, thermally stable apparatus for testing vapor liquid equilibrium.

Complete Your Fractional Distillation Setup

An Oldershaw column requires precise supporting laboratory infrastructure to function safely and effectively. Source compatible equipment through HiTechTrader to build out your chemical processing stack:

• Precision Heating: Control the boil-up rate of your boiling flasks using our laboratory reactors and digital heating mantles.

• Vacuum Distillation: Lower internal boiling points to protect heat-sensitive compounds using our solvent-resistant laboratory pumps.

• Condenser Cooling: Drive perfectly chilled fluid through your overhead condensers using our precise refrigerated circulators and chillers.

• Analytical Verification: Validate the exact purity of your distilled fractions using our premium analytical instruments, featuring fully refurbished used GC-MS systems.

• Structural Safety: Secure your complex glassware assemblies safely using our specialized clamps and containment and safety equipment.

Buy the Used 22.5-Inch Oldershaw Distillation Column

HiTechTrader offers this Used 22.5-Inch Silver Vacuum Jacketed Oldershaw Distillation Column fully inspected for structural integrity and vacuum seal quality. Bypass the immense capital costs of commissioning custom glassware and acquire high resolution separation capabilities today.

Contact HiTechTrader today to:

• Request official pricing or learn about current specials and discounts.

• Discuss compatibility with your existing 35/25 hardware and 50/32 spherical ball joint clamps.

• Arrange for secure, heavily padded domestic or international freight shipping.

FAQs

What is the difference between an Oldershaw distillation column and an Oldershaw mixing column?

An Oldershaw distillation column is engineered specifically for fractional distillation and boiling-point separation. It contains a series of internal perforated plates (trays) and downcomers. As hot vapor rises, it is forced through the liquid on each plate, creating theoretical stages that separate chemicals based on vapor-liquid equilibrium. Conversely, an Oldershaw mixing column is designed for gravity-fed liquid homogenization; it uses closely spaced internal protrusions to disrupt flow and mix multi-part liquids, without utilizing heat, vapor, or theoretical staging.

Why use a 50/32 spherical ball joint on the bottom of a distillation column?

A large 50/32 spherical ball joint is used at the base of a distillation column to provide crucial alignment flexibility and relieve mechanical stress. Rigid standard taper joints can bind or snap under the lateral stress of thermal expansion and heavy boiling. A spherical ball joint, when secured with a pinch clamp, allows for slight angular deflection. This safely supports the structural weight of the glass column while maintaining a perfect high vacuum seal against the boiling flask.