The gap between flask chemistry and process development

According to Dr Stuart Crosby, one message kept appearing consistently in user conversations.

Scientists wanted to work at smaller volumes, but they did not want to lose the control and confidence of a true jacketed reactor system.

“Customers were telling us they needed to do proper jacketed reactor work at smaller volumes. They wanted to understand processes earlier, use less material, reduce waste and work within crowded fume hoods, but the options available were often either too basic or too large.”

For many labs, that meant compromise.

Simple glassware setups, hotplates, oil baths and heating mantles could work for exploratory chemistry, but they did not always provide the level of control, repeatability or process understanding needed as projects developed. Larger reactors offered the right level of capability but could be larger than necessary for the scale of chemistry being performed.

That gap between flask chemistry and larger-scale process development became the starting point for Reactor-Ready Mini.

One of the most interesting points from the speaking to Stuart was that Reactor-Ready Mini was not developed simply to create “a smaller jacketed lab reactor”.

Instead, the team focused on a specific stage of process development: the point where chemists need to move beyond flask chemistry but are not yet ready or able to use a larger jacketed reaction system.

“Users had needs that sat between flask chemistry, small-scale automated reaction stations like Mya 4, and full-size JLRs like Reactor-Ready. Reactor-Ready Mini came from asking: how do we bring jacketed reactor capability to that smaller, earlier-stage scale?”

That question shaped the whole project.

The Radleys team saw growing demand for a compact platform that would allow chemists to:

• work at lower volumes
• reduce material use and waste
• generate meaningful process data earlier
• fit equipment comfortably into standard fumehoods
• move more confidently from flask chemistry into jacketed reactor workflows

The result was not a scaled-down product. It was a jacketed reactor platform designed around a low-volume workflow.

Another important part of the brief was usability.

The team knew there were already small jacketed reactor options available, often built onto fixed stands or frameworks. These can sometimes be found as a route into smaller-scale jacketed reactor chemistry, but they do not always solve the day-to-day workflow problem.

In practice, once these systems are assembled, they are often left in place because changing vessels or reconfiguring the setup can be awkward and time-consuming.

Reactor-Ready Mini was developed to bring one of the key strengths of the Reactor-Ready platform to smaller-scale work: easy, rapid vessel exchange.

“Customers did not just need a small jacketed reactor. They needed a small reactor platform that was easy to use, easy to reconfigure and easy to move between vessel sizes. That flexibility was a big part of the thinking behind Reactor-Ready Mini.”

This meant the design had to support the way chemists actually work: moving between experiments, changing scale, swapping vessels and adapting setups without the system becoming a fixed installation in the fumehood.

User feedback repeatedly pointed towards the same volume range.

“Customers kept pointing us towards the 50-500 mL range. It was small enough to reduce material use, but still large enough to give useful process understanding.”

The 50 mL vessel became particularly important because it addressed a genuine gap at the lower end of jacketed reactor work.

Early-stage compounds can be expensive, scarce or time-consuming to make. Wasting material at this stage is not just inefficient, it can slow the whole development project.

Smaller-scale work also helps reduce waste while allowing scientists to begin building process understanding earlier in development.

Another theme that strongly influenced Reactor-Ready Mini was space.

The R&D team repeatedly heard from users who were trying to fit reactors, circulators, balances and accessories into real working fumehoods.

“A reactor can be technically right, but if it doesn’t fit comfortably in the space where people actually work, it’s not solving the problem.”

This made footprint a core part of the design process from the beginning.

Laboratory equipment does not operate in theory. It has to work in crowded, awkward, already-occupied spaces.
Interestingly, one of the strongest moments of validation came during beta testing.

“Seeing it in the fume hood was the real confirmation. People understood it straight away. Jacketed chemistry at smaller volumes, without taking up the space of a full-size system. Seeing Reactor-Ready Mini sat neatly alongside existing equipment, the need was obvious.”

That immediate reaction reinforced that Reactor-Ready Mini was solving a genuine workflow issue, not simply adding introducing a smaller product.

Although Reactor-Ready Mini focuses on smaller working volumes, maintaining representative process conditions remained essential. The R&D team was clear that low-volume chemistry still requires proper reactor functionality.

“The chemistry may be smaller, but the process still has to be representative. Users still need jacketed temperature control, overhead stirring, probe access, sampling, additions, and drain-down.”

This became an important design principle.

Reducing the footprint and working volume could not mean stripping away the functionality scientists rely on for process development. The system still had to support the practical details that matter: temperature control, stirring, additions, sampling, probe access and drain-down.

This also influenced the physical design of the system.

“Users wanted to work at smaller volumes, but still fit the probes, stirrers and accessories they rely on. That meant we had to think carefully about vessel geometry, port positions, drain-down, stirring and how everything worked together in a tighter space.”

This is where the design challenge became more than just miniaturisation. The goal was not just to make chemistry smaller.

The team had to preserve reactor functionality in a compact format, without making the system awkward to use.

One of the clearest themes running through the conversation with Stuart was the importance of generating meaningful process information earlier.

If early experiments are performed using equipment that behaves very differently from a true jacketed lab reactor, the learning may not transfer cleanly into later development work. That can create uncertainty when chemists move towards larger scale.

Reactor-Ready Mini was developed to help bridge that gap.

By allowing chemists to start small while still using representative reactor workflows, the system supports earlier understanding of:

• temperature control
• mixing
• additions
• sampling
• overall process behaviour

That gives scientists a stronger foundation before they commit more material, more time and more resources to the next stage of development.

Reactor-Ready Mini was created to solve a practical need: Scientists wanted the control and confidence of jacketed reactor chemistry at smaller scale, in smaller spaces, and with smaller quantities of material.

The team designed it around real lab workflows, not a theoretical product brief.

“We were not trying to make a smaller reactor for the sake of it. We were trying to make serious jacketed reactor work possible at the smallest practical scale.”

Learn more about Reactor-Ready Mini