New SGA 35/25 Silver Vacuum Jacketed Oldershaw Distillation Column

High-Efficiency 22-Inch Benchtop Fractionator | 1-Inch ID | 35/25 Spherical Connections

• Manufacturer: SGA

• Condition: New 

• Function: Fractional Distillation / Vapor-Liquid Separation

• Scale: 22 Inches (558.8 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 | 35/25 Bottom Spherical Ball Joint

• Thermal Protection: Silver-Coated Corrugated Vacuum Jacket (No Expansion Bellows)

Technical Overview: The Benchtop Separation Standard

When standard Vigreux or packed columns fail to provide the theoretical stages required to separate liquid mixtures with closely related boiling points, the scientific community relies on the Oldershaw design. The New SGA 35/25 Silver Vacuum Jacketed Oldershaw Distillation Column is a highly efficient, laboratory-scale fractionator engineered specifically for benchtop chemical processing and high-resolution solvent recovery.

Unlike simple glass tubing, this 22-inch (558.8 mm) borosilicate glass column houses a precise series of internal perforated plates (trays) and downcomers. As hot vapor ascends, it is forced through the descending liquid reflux on each successive plate, maximizing vapor-liquid equilibrium and acting as individual theoretical stages. To preserve the delicate thermal gradient required for this separation, the column is encased in a 2-inch corrugated silver vacuum jacket. Offered in pristine, new condition and featuring a stress-relieving 35/25 spherical ball joint at the base, this SGA column delivers uncompromising fractionation power within a standard fume hood footprint.

Technical Specifications

Core Engineering & Design Advantages

22-Inch High Resolution Separation Path

The 22-inch length strikes the perfect balance for benchtop synthesis. It provides enough vertical distance to stack a sufficient number of theoretical plates for separating complex structural isomers or purifying contaminated laboratory solvents, while remaining compact enough to integrate easily into standard fume hoods alongside heating mantles and receiving flasks.

Near-Adiabatic Stability via Silvered Jacketing

Maintaining a strict adiabatic gradient is the most critical factor in fractional distillation. If ascending vapor cools and condenses prematurely before reaching the top joint, the distillation fails. The silver coating on the corrugated 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 maintains a perfect temperature profile, regardless of ambient laboratory drafts.

Crucial 35/25 Spherical Ball Joint Base

This specific column is manufactured without expansion bellows (the flexible glass folds that normally absorb thermal expansion). To compensate for this rigid architecture during high temperature boiling, SGA equipped the base with a 35/25 spherical ball joint. When secured with a specialized pinch clamp, this rounded joint provides crucial alignment flexibility and angular deflection. It allows the column to shift slightly under thermal stress, preventing catastrophic shearing forces from snapping the glassware at the boiling flask connection.

1-Inch Internal Bore Capacity

The 1-inch (25.4 mm) internal diameter is the industry standard for laboratory scale Oldershaw columns. It provides enough internal volume to process standard benchtop liquid batches rapidly without inducing vapor flooding, while keeping liquid holdup minimal to preserve yields of expensive or rare target compounds.

Ideal Scientific Community Applications

This pristine, vacuum-jacketed column is designed for stringent research and development environments:

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

• Solvent Recovery & Purification: Distilling and purifying daily batches of contaminated extraction solvents directly on the laboratory bench.

• Pharmaceutical R&D: Achieving absolute purity in active pharmaceutical intermediates through controlled, thermally isolated fractionation.

• Academic Method Development: Serving as an ideal, highly visible teaching and research tool for demonstrating vapor-liquid equilibrium and theoretical staging.

Complete Your Benchtop Distillation Setup

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

• Precision Heating: Control the boil-up rate of your boiling flasks exactly 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.

• Stay Informed: Keep up with the latest methodologies in fractional distillation, thermal isolation, and equipment sourcing by reading HTT Magazine.

Why Buy This SGA 35-25 Silver Vacuum Jacketed Oldershaw Column from HiTechTrader?

HiTechTrader helps laboratories source scientific, analytical, chemical processing, and laboratory equipment for research, testing, purification, process development, and education. This new SGA 35-25 Silver Vacuum Jacketed Oldershaw Column is a strong choice for buyers who need compact specialty glassware for distillation support, vapor transfer, thermal isolation, solvent purification, reflux, or custom process support.

This column can be paired with compatible lab systems and equipment, including:

• laboratory reactors
• Parr reactors
• laboratory pumps
• analytical instruments
• used GC-MS systems
• containment and safety equipment
• used laboratory equipment

For laboratories building a complete distillation, purification, reflux, or chemical process workflow, this Oldershaw column may be used alongside compatible boiling flasks, condensers, receiving vessels, vacuum systems, pumps, heating equipment, analytical instruments, and laboratory reactors.

New SGA 35-25 Silver Vacuum Jacketed Oldershaw Column for Sale

HiTechTrader offers this new SGA 35-25 Silver Vacuum Jacketed Oldershaw Column for laboratories needing compact silver vacuum jacketed glassware for distillation support, vapor transfer, thermal isolation, solvent purification, and chemical process development.

This column is a strong fit for research labs, organic chemistry labs, specialty chemical workflows, solvent purification setups, temperature sensitive vapor handling, vapor-liquid contact support, and custom laboratory glassware assemblies.

Contact HiTechTrader to request pricing, verify 35/25 joint compatibility, confirm internal configuration, or source additional laboratory glassware and chemical processing equipment for your setup.

FAQs

What is a 35/25 Oldershaw distillation column used for?

A 35/25 Oldershaw distillation column is a highly efficient laboratory-scale glass apparatus used for fractional distillation. It features internal perforated plates and downcomers that act as individual theoretical stages, forcing continuous vapor-liquid equilibrium to precisely separate chemical mixtures based on their boiling points. The "35/25" designates the joint sizing, allowing it to integrate seamlessly with compatible laboratory glassware setups for solvent recovery and chemical purification.

Why use a spherical ball joint on an Oldershaw column without expansion bellows?

When an Oldershaw distillation column heats up during operation, the inner glass tube expands. If the column lacks expansion bellows (corrugated, flexible glass sections designed to absorb this growth), the structural stress must be relieved elsewhere to prevent the rigid glass from shattering. Utilizing a spherical ball joint at the base provides critical alignment flexibility; it allows the column to deflect slightly during thermal expansion, safely supporting the glassware without putting catastrophic lateral stress on the boiling flask connection.