New Lab Glass 42-Inch Silver Vacuum-Jacketed Oldershaw Mixing Column

Micro-Bore 0.5-Inch ID Gravity Mixing Apparatus | Standard 24/40 Joints | Ultra-High Dwell Time

• Manufacturer: Lab Glass

• Condition: New (Unused, Pristine)

• Function: Fractional Gravity Mixing / Low-Volume In-Line Homogenization

• Aspect Ratio: Extreme 42-Inch (1066.8 mm) Length vs. 0.5-Inch (12.7 mm) ID

• Joint Configuration: 24/40 Top and Bottom Standard Taper Joints

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

Technical Overview: High-Shear Mixing for Low Volume Samples

When continuous-flow chemistry requires extended fluid contact time but involves highly valuable, low-volume reagents, massive 2-inch ID columns introduce unacceptable liquid holdup. The New Lab Glass 42-Inch Oldershaw Mixing Column solves this by combining an extreme vertical drop with a specialized "micro-bore" internal diameter.

Measuring a towering 42 inches in length but featuring a highly restricted 0.5-inch (12.7 mm) internal diameter, this pristine borosilicate glass apparatus functions as a highly efficient, laboratory-scale fractional gravity mixing column. As low-volume liquid samples descend through the narrow, protrusion-packed internal bore, they are subjected to intense, continuous shear forces over a 3.5-foot path. This maximizes fluid dwell time and mixing turbulence while keeping total column holdup to an absolute minimum. Shielded by a silvered vacuum jacket and fortified with expansion bellows, this column drops seamlessly into standard synthetic setups via universal 24/40 taper joints.

Master Technical Specifications

Core Engineering & Design Advantages

Extreme Aspect Ratio (42" Length x 0.5" ID)

The defining feature of this specific Lab Glass column is its capillary-like profile. In fractional gravity mixing, the protrusions disrupt the fluid path. By forcing the liquid through a narrow 0.5-inch corridor over a massive 42-inch distance, the column creates extreme internal turbulence. This design guarantees absolute homogenization of multi-part reagents or biphasic mixtures while maintaining a very low internal liquid volume (holdup), making it perfect for high-value active pharmaceutical ingredients (APIs) or expensive catalyst suspensions.

Near Adiabatic Stability via Silvered Jacketing

Transporting low volume fluids across a 42-inch vertical gap exposes them to significant thermal loss. The silver coating on a vacuum jacketed Oldershaw column is there primarily to reduce heat transfer by radiation. The evacuated outer jacket eliminates convective and conductive heat loss, while the reflective silver mirror completely isolates the internal micro-bore from ambient radiant temperatures. This ensures that temperature-sensitive extractions or heated reagent feeds remain perfectly stable throughout the entire 3.5-foot transit.

Universal 24/40 Standard Taper Joints

Unlike pilot-scale columns that require specialized spherical ball joints and metal pinch clamps, this column is outfitted with ubiquitous 24/40 standard taper ground glass joints. This allows the 42-inch column to be instantly integrated into almost any standard academic or synthetic organic chemistry setup, mating perfectly with standard 24/40 boiling flasks, addition funnels, and condenser heads without the need for custom adapters.

Corrugated Expansion Bellows for Stress Mitigation

When a 42-inch internal glass tube is heated, linear thermal expansion is significant. Because the 2.5-inch outer vacuum jacket remains at room temperature, this differential expansion would normally shatter the glass welds at the joints. Lab Glass prevented this by integrating corrugated expansion bellows directly into the outer jacket. These glass folds physically compress and expand, acting as a mechanical shock absorber during high-temperature continuous-flow operations.

Ideal Scientific & Laboratory Applications

This brand-new, micro-bore mixing column is specifically engineered for high-value, low-volume continuous processing:

• High-Value API Homogenization: Continuously mixing expensive pharmaceutical intermediates where minimizing liquid holdup inside the column is a strict financial requirement.

• Micro Scale Liquid Liquid Extractions: Maximizing the contact area between two immiscible phases over an extended vertical drop.

• Precision Reactor Feeds: Functioning as an in-line static mixer to ensure multiple reagents are perfectly blended immediately before entering a 24/40 reaction vessel.

• Continuous Flow Organic Synthesis: Providing an unpowered, high turbulence fluid path for academic and R&D methodology development.

Complete Your Continuous Flow Setup

A column with this extreme length requires proper support and precise fluid metering. Build out your continuous-flow system with fully compatible equipment from HiTechTrader:

• Standard 24/40 Glassware: Safely integrate this column with compatible 24/40 receiving flasks, dropping funnels, and standard taper adapters from our used laboratory equipment inventory.

• Precision Fluid Metering: Drive highly controlled, low-volume liquid flow into the top of this 0.5-inch ID column using our precision laboratory pumps.

• Reactor Integration: Feed your perfectly mixed reagents directly into heated vessels or high-pressure laboratory reactors and benchtop Parr reactors.

• Structural Safety: Secure this towering, 3.5-foot glass apparatus using appropriate framework and containment and safety equipment.

• Analytical Verification: Validate the absolute uniformity of your continuous extractions using our premium analytical instruments, featuring top-tier used GC-MS systems.

Buy the New Lab Glass 42-Inch Mixing Column

HiTechTrader offers this New Lab Glass 42-Inch Silver Vacuum Jacketed Oldershaw Mixing Column for synthetic chemists and process engineers requiring pristine, standard-taper glassware for low-volume, high-dwell fluid homogenization.

Contact HiTechTrader today to:

• Request official pricing and confirm compatibility.

• Discuss compatible 24/40 glassware, structural support clamping, and continuous flow integration.

• Arrange for custom crated, heavily padded domestic or international freight shipping to protect this specialized 42-inch micro-bore component.

FAQs

What is an Oldershaw gravity mixing column?

A laboratory-scale fractional gravity mixing column is a highly efficient glass apparatus used to homogenize continuous-flow liquids. Instead of separating vapors like a distillation column, it uses an internal series of closely spaced glass protrusions to constantly disrupt the path of descending fluids. This creates intense turbulence, thoroughly mixing multi-part reagents or biphasic solutions without the use of motorized stirrers.

Why does a micro-bore column need a silver vacuum jacket and expansion bellows?

When processing fluids through a narrow (0.5-inch ID) column over a long distance, the surface-area-to-volume ratio causes rapid heat loss. The silver coating on a vacuum-jacketed Oldershaw column is there primarily to reduce heat transfer by radiation, perfectly insulating the small volume of fluid. Because a 42-inch heated inner tube expands at a different rate than the cooler 2.5-inch outer jacket, corrugated expansion bellows are built into the design to physically flex, preventing the thermal stress from shattering the borosilicate glass.