ChemJunction is a developing engineering platform for practical process calculations, equipment design and plant utility assessment.
Continuous fractional distillation design for Methanol–Water using VLE, McCabe–Thiele, hydraulics and tray/packing assessment.
The first live engineering calculator in the ChemJunction platform.
A single-page engineering application covering reactor thermal duty, batch distillation vapour generation and primary/secondary condenser adequacy.
• Reactor thermal duty and heat-transfer analysis
• Batch distillation vapour generation
• Primary and secondary condenser design & adequacy
• Condensate recovery and vapour-loss assessment
• Utility requirements and engineering summary
A continuous fractional distillation design application for Methanol–Water mixtures, covering VLE generation, McCabe–Thiele stage calculations and column hydraulic assessment.
• Methanol–Water VLE using NRTL / Wilson
• McCabe–Thiele theoretical stage analysis
• Reflux, feed stage and product calculations
• Tray and packed column options
• Hydraulic and flooding assessment
A featured ChemJunction engineering application for multi-component distillation studies, covering component-wise vapour-liquid behaviour, distillation calculations and engineering assessment.
• Component-wise vapour-liquid equilibrium
• Binary and multi-component distillation calculations
• Composition and vapour-phase analysis
• Distillation engineering assessment
• Engineering results, charts and reports
A thermodynamics application for pressure-dependent binary vapour-liquid equilibrium calculations using the ChemJunction NRTL binary-interaction database.
• Pressure-dependent equilibrium temperature
• Component-wise liquid and vapour compositions
• NRTL-based non-ideal VLE
• Mole-fraction and mass-fraction reporting
• Downloadable VLE calculation data
Additional modules will be introduced progressively after engineering validation.
Quick day-to-day engineering calculations and practical utilities for process engineers.
Open Daily Calculator →Heating, cooling, duty and batch-cycle calculations.
AVAILABLEBatch evaporation and distillation vapour-load calculations.
AVAILABLEDuty, LMTD, area and condenser adequacy.
AVAILABLEPressure-dependent binary vapour-liquid equilibrium and composition calculations.
Launch Tool →Component-wise process calculations for multi-component distillation engineering.
Launch Tool →Continuous fractional distillation design with VLE, McCabe–Thiele and column hydraulics.
Launch Tool →Network flow distribution and pressure-drop calculations.
PLANNEDSteam, cooling water, chilled water and vacuum requirements.
PLANNEDProperties and engineering data for process calculations.
PLANNEDStructured calculations, graphs and design reports.
PLANNEDA staged approach keeps each engineering module testable and maintainable.
Deploy and validate practical HTML/JavaScript tools.
Connect engineering modules and structured data.
Introduce advanced server-side calculation engines.
A practical engineering approach built from long-term experience in chemical process and pharmaceutical API manufacturing.
I am a Chemical Engineer and Process Engineer with more than 24 years of experience, currently working in pharmaceutical API manufacturing. My professional work is focused on practical process engineering, plant design, equipment sizing, thermal calculations, utilities and manufacturing operations.
Over the years, I have worked with a wide range of API manufacturing processes and engineering requirements. ChemJunction was created to convert this practical engineering experience into structured, transparent and useful calculation tools for process engineers.
The objective is simple: make engineering calculations more practical, traceable and accessible by combining chemical-engineering fundamentals with modern web technologies, Python and AI-assisted development.
Chemical & Process Engineering
INDUSTRY Pharmaceutical APIsProcess manufacturing & plant engineering
CORE FOCUS Engineering ToolsReactors • Vapour Load • Condensers • Distillation • Piping • Utilities
For questions, suggestions, engineering feedback or enquiries about ChemJunction tools, send a message directly to Madhan.
I welcome feedback, suggestions, engineering questions and ideas that can help improve the ChemJunction platform.
Clicking the email address or using the form will open your default email application with the message addressed to ChemJunction.
For questions, suggestions, engineering feedback or enquiries, please contact Madhan directly by email.
Email Address
madhan@chemjunction.inClick the email address to open your default email application and send your message directly to ChemJunction.
ChemJunction.in — Chemical Engineering Calculation & Process Design Platform.