Real-time batch column simulation
Reboiler, tray section, and reflux drum modeled together with live trends.
PiDistill-B is real-time batch distillation column simulator software that models reflux drum behavior, cut transitions, and end-point determination, without tying up a real batch column. Built by PiControl Solutions, PiDistill-B is process control simulation software for engineer training, operator practice, and university education. It integrates models of reboiler heat input and cooling-water flow control alongside the column and reflux drum, and that combination makes PiDistill-B the reference simulator for batch distillation training in specialty chemical plants, pharmaceutical plants, and engineering colleges.
Batch distillation is unforgiving compared to continuous operation: a fixed charge runs through sequential cuts, and every heads-cut, heart-cut, and tails-cut decision has to be made from trends that are changing the whole time. PiDistill-B reduces operator-training and end-point-decision risk by letting engineers practice cut transitions, watch reflux drum response, and build end-point judgment on a high-fidelity simulator first, before they run a real batch.
PiDistill-B simulates the real-time dynamics of a batch distillation column (reboiler, tray section, and reflux drum) so engineers can practice cut-taking, end-point determination, and reflux control under realistic batch conditions. PiDistill-B runs on standard Windows hardware, requires no column hardware, and ships with configurable batch charge, tray count, and thermodynamic parameters for matching specific plant systems. Because it models the same decisions engineers later make on a real batch unit, the judgment transfers directly from simulator to plant.
Reboiler, tray section, and reflux drum modeled together with live trends.
Switch between light, heavy, and intermediate fractions and observe the effect on product purity.
Composition, temperature, and time trends drive the decision to stop a cut.
Heat-input and cooling-water flow control coupled to column response.
Reflux ratio, column temperature, and reflux drum level in a layout familiar to plant operators.
Charge size, tray count, and thermodynamic data for matching real plant systems.
Specialty chemical and pharmaceutical plants use PiDistill-B to train new process engineers, walk operators through batch startup and cut-taking sequences, and build end-point judgment before those decisions run on a real charge. Because a bad cut call on a live batch means off-spec product or a reprocessed lot, PiDistill-B gives engineers repeated practice on industrial process control systems without production risk.
Engineering colleges and universities use PiDistill-B to teach batch distillation, separation processes, and process control in undergraduate and graduate chemical engineering courses. PiDistill-B replaces static batch-still calculations with hands-on simulator practice, supporting lab protocols, remote learning modules, and interactive classroom simulations aligned with Industry 4.0 digital-laboratory standards.
For PiControl's continuous distillation simulator, see PiDistill. For azeotropic batch separations specifically, see PiDistill-B Lite.
PiDistill-B's feature set is built for one outcome: engineers who can run a batch cut correctly the first time.
Simulates batch column response in real time with adjustable charge size, reflux ratio, and heat input.
Reflects actual batch timing, so engineers see how a charge depletes and composition drifts under realistic dynamics.
Models the switch between heads, heart, and tails cuts as composition and temperature shift.
Produces the exact decision point trainees struggle with most: when to switch receivers.
Reads composition, temperature, and elapsed-time trends to identify when a cut is complete.
Turns a subjective plant judgment call into a trained, repeatable skill.
Couples reboiler heat input and cooling-water flow control to column and reflux drum response.
Shows how utility-side changes ripple into cut composition and end-point timing.
Reflux ratio, column temperature, reflux drum level, and cut status in an operator-familiar layout.
Removes the interface learning curve, so engineers focus on the cut decision, not navigation.
Charge size, tray count, and thermodynamic data configured per training scenario.
Matches simulated batches to the specific columns and products a plant or curriculum runs.
Batch distillation is one of the few unit operations where the same column produces a different outcome every run, because the charge depletes and composition drifts continuously from startup to end point. The traditional ways of training engineers (textbook batch-still calculations, classroom lectures, and on-the-job practice on production batches) share one structural limitation: none of them gives the learner a live cut-composition trend to react to in real time. A late or early cut switch shows up directly in product purity and batch yield, so a training gap here touches nearly every batch a plant runs.
A textbook batch-still calculation produces one answer for one relative volatility at one instant. It never captures how reflux drum composition drifts as the charge depletes, or how a cut decision made too early or too late compounds over the rest of the batch. Engineers who can solve the textbook problem are often unprepared when a real batch runs long or short.
Lectures on batch distillation theory transfer terminology but not judgment. An engineer who can describe the Rayleigh equation can still misjudge a heart-cut end point on a live column, because end-point competence comes from watching trends move and reacting, not from lecture comprehension.
OJT on production batches is how most engineers actually learn, and it carries real cost: off-spec cuts, reprocessed or scrapped lots, and lost batch time, accepted as the price of learning. Plants, especially pharmaceutical plants, would prefer the learning curve to happen somewhere else.
PiDistill-B removes the structural problem: a live cut-composition trend in real time, on dynamic models that capture reboiler, cooling-water, and reflux drum behavior, and no production batch at risk. Engineers arrive at their first real batch already having made, and corrected, the cut-timing mistakes that would otherwise cost a plant a reprocessed lot.
PiDistill-B is one of three distillation simulators in PiControl's process control software suite, each built for a different column type or training depth.
Where PiDistill-B models a fixed charge run to an end point, PiDistill's continuous distillation simulator models steady-state feed, product draws, and reflux. Plants that run both batch and continuous columns often train engineers on both simulators.
For plants and courses focused specifically on entrainer-based separations, PiDistill-B Lite is a lighter-footprint batch simulator built around azeotropic distillation rather than general batch training.
Before engineers tune the reflux, temperature, and level loops on a batch column, many practice the underlying PID tuning skill on SIMCET, PiControl's real-time PID tuning simulator with a testing-and-grading module.
Engineers train on PiDistill-B across every sector PiControl serves — each runs different batch products and cut specifications, and PiDistill-B's configurable batch parameters reproduce the exact column their own plant runs.
PiDistill-B is deployed in specialty chemical and pharmaceutical plants and engineering colleges across 40+ countries, and it is one of PiControl's core distillation simulators, used by corporate training departments and university process control courses alike. Read more in our customer success stories.
Request the PiDistill-B installer and licensing details for your plant or department.
See PiDistill-B run in real time and walk through a full batch, from startup to final cut. A PiControl engineer will demonstrate the simulator on batch dynamics relevant to your plant or curriculum, and map out a training path for your team.