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Chemapp for Python & FactSage are developed by and available from GTT-Technologies.

FactSage 8.3 has been released in October 2023.
Free ChemApp for Python license available until end of August 2024 (Tc’s & C’s apply).

GTT-Technologies develops its own Factsage thermochemical databases. Presently, the GTT databases are the following ones:

a) GTT Oxides Database (GTOx) – GTOx includes a better description for some combinations of oxides, e.g. high Na2O- and K2O-containing systems like biomasses (2016-2019) or Vanadium oxide containing systems (2019-). In 2023, the so-called unified liquid phase model (SLIQ) was introduced in GTOx. This describes the liquid sulfide, the liquid oxide and the liquid metallic melt with a single liquid solution model.


b) aiMP (ab initio Materials Project) and aiOQ (ab initio OQMD) – these databases are based on ab-initio data calculated at 0K by using quantum-mechanical approaches (DFT). We at GTT have upscaled the thermodynamic stability of hundred of thousands of compounds from 0K to relevant temperatures.



The SysCAD software is a robust and versatile process plant modelling package that has its origins in 1985, as one of the engineering software products developed by Kenwalt. It helps with both daily management and operations and becomes a comprehensive source of knowledge for process plants going forward. SysCAD is used throughout the lifecycle of a project – from feasibility studies to plant design, control system design, testing, commissioning, in-plant process optimisation, planning and as an operations tool.

SysCAD process models are company assets and provide a means for building corporate memory, thereby assisting in maintaining continuity in the event of personnel turnover. The software is mature enough to be used to model most processes with the built-in units and models, but its versatility allows for the creation of models for new and unique processes.

Both Ex Mente and KWA are passionate about empowering the next generation of engineers in the minerals industry. The SysCAD software has applications in educational institutions for both research and academia. It is well suited to facilitate teaching of process modelling and simulation as well as process control. For a list of universities that use SysCAD, please click here. Academic licenses are available at reduced rates.

Please contact us for more information on acquiring SysCAD licenses.

OLI Systems

About OLI Systems

OLI Systems is an established global leader in delivering comprehensive process modelling solutions for water chemistry based industrial applications, to enhance operational efficiency, sustainability and engineering productivity whilst mitigating risk.

OLI Systems delivers the most rigorous and accurate process modelling, simulation insights and intelligence with: an extensive chemistry property database, differentiated thermodynamic and kinetic models, and proven software platforms for oil & gas, power generation, metals & mining, chemicals and water treatment applications.

OLI Studio

This is OLI’s Windows software platform to enhance process research, design and operations performance with rigorous chemistry analysis. OLI Studio uses in-depth insights on behaviour of electrolyte and nonelectrolyte streams, with first principles-based prediction of multi-point equilibrium calculations, for multi-component systems. A broad range of operating conditions are analysed to increase operations efficiency, sustainability and productivity. OLI Studio is a comprehensive, first principles-based analysis tool with an unparalleled chemistry property database and three thermodynamic models. It delivers accurate, rigorous, multi-component calculations for the broadest range of phenomena and operating conditions. OLI Studio consists of three different product – Stream Analyzer, ScaleChem and Corrosion Analyzer.

Stream Analyzer™ enables in-depth chemistry analysis for electrolyte and nonelectrolyte systems that: serves as a virtual lab for chemistry analysis, reduces physical experiments, improves quality of process designs, speeds up process troubleshooting and makes environmental compliance cost effective.

Scalechem™ enables accurate mineral scaling prediction in oil and gas production, water and wastewater treatment as well as in other industrial applications. It delivers granular predictive insights to mitigate risk from production interruption or asset damages. ScaleChem also enhances the quality of the asset and process design to increase production yields and operations efficiencies.

Corrosion Analyzer™ enables accurate prediction of general and localized corrosion, depletion profiles and stability of metals in harsh industrial applications. It enables digital R&D to: rapidly and efficiently mitigate corrosion with reduced experimentation, increase useful asset life with accurate corrosion modelling and prediction, and improves operational efficiency and reliability with optimal material selection and asset design.

OLI Engine: Developer Edition

This enables access to the OLI Engine to incorporate electrolyte insights into custom Windows applications. This capability can be used to create custom interfaces with the OLI Engine or run calculations directly from the OLI Engine in your custom application with the Windows APIs.

OLI Alliance Engine

Pre-built custom interfaces to the OLI Engine are available, for commercial process simulators to use the OLI Engine as an embedded electrolyte chemistry model. This improves effectiveness of process design and operations performance. The OLI Alliance Engine is available for Aspen Plus, Aspen HYSYS, PRO/II, UniSim Design, Petro-SIM, SysCAD, gPROMs and Symmetry.

OLI Flowsheet: ESP

This is OLI’s Windows offering to optimise process design and operations. Optimisation is done by rigorous process simulation for electrolyte and nonelectrolyte streams, using first principles-based thermodynamic models. It enables electrolyte based, steady-state process simulation for multi-phase systems with speciation. It can be used to improve quality of process design, minimize CAPEX & OPEX, maximize yields, troubleshoot operations challenges, enhance sustainability and make environmental compliance cost effective in water treatment, mining, oil & gas and chemicals industries.


The new OLI Cloud API’s accelerate productivity and operations efficiency with automated chemistry insights. It can enable any software application with anywhere, anytime access to automated electrolyte calculations, for in-depth chemistry insights from the OLI Engine on the cloud. They use the same first principles-based models and database capabilities that are currently available in the OLI Windows platform to deliver accurate, rigorous, multi-component calculations for the broadest range of phenomena and operating conditions.

OLI Cloud Apps

The new OLI Cloud Apps democratise electrolyte technology with simple, easy to use, cloud-based electrolyte applications for engineers, operations supervisors and operators. The Apps can be accessed anytime, anywhere to gain rapid electrolyte insights for improving operations efficiency, sustainability and reliability. Any process simulation model developed in OLI Flowsheet:ESP, can be delivered as a simple OLI Cloud App with a limited number of inputs, outputs and calculations using the OLI Cloud App Builder. These Cloud Apps use the same first principles-based models and database capabilities that are currently available in the OLI Windows platform.

PDE Solutions:


The Original, Unlimited, Scripted, Multiphysics, Finite Element Solution Environment for Partial Differential Equations is now more powerful than ever. Whether your 1D, 2D or 3D Multiphysics PDE problem is HeatFlow, Electromagnetics, Stress Analysis, Chemical Reactions, Diffusion or another, this Software Tool takes you from Mathematical Model to Numerical Solution to Graphical Display.

From stress analysis to chemical reaction kinetics to stock option pricing, mathematical modelling of real-world systems is dominated by partial differential equations. FlexPDE addresses the mathematical basis of all these fields by treating the equations rather than the application.

Please contact us for more information.

Dr Jaco Swanepoel


Jaco is a Chemical Engineer with twelve years of experience in projects that range from reactive metals handling, reactive metal powder production in molten salt slurry reactors, extractive metallurgy to microwave-assisted gas-solid materials processing.
Jaco contributed to three process patents and obtained a PhD degree in Chemical Engineering. Jaco also completed the KTP Management and Leadership Study Program at Ashorne Hill Management College, England.

Stefan van der Merwe


Stefan’s greatest passion is to enable people. By combining his greatest passion with his love for technology, he finds joy in making computing infrastructure accessible to the non-technical, and developing software that uncomplicates tasks. As a software engineer with qualifications in electronic engineering and bioengineering, Stefan is responsible for software development, enabling the team and clients to advance through insight.