Reaction calorimetry provides information quickly which can be applied to quantify the risks and criticality associated with a chemical process. Reaction calorimetry helps identify key process parameters, including: Continue reading →
Some of the major challenges faced by researchers (and in particular – organic and analytical chemists) include the need to quickly determine reaction kinetics as well as gain sufficient information to fully understand, characterize and optimize chemical reactions. This is leading researchers to find innovative ways to obtain the information they require to successfully complete their work.
This is the first blog post in a 2 part series in which I will discuss the real-time monitoring of bio-based chemical synthesis.
Biocatalysis continues to evolve, with the application of recombinant organisms or isolated enzymes designed to catalyze specific chemical reactions – often with highly regiospecific and stereospecific conversions. In the optimization of any chemical synthesis reaction – by traditional or biocatalyzed routes – it is not enough to simply report the yield and the enantiameric excess (ee), the kinetics of the reaction must also be considered. Understanding how the kinetics are affected by conditions such as pH and temperature allows optimization of biocatalysis through the identification of operating conditions that can ensure a maximum yield and desired ee in a timely manner. Continue reading →
Traditionally, organic chemistry students have been instructed to analyze reactions using standard offline analytical methods, such as High-Performance Liquid Chromatography (HPLC), Nuclear Magnetic Resonance (NMR) Spectroscopy, and Gas Chromatography (GC).
Traditional offline methods to analyze reaction chemistry, such as High-Performance Liquid Chromatography (HPLC), Nuclear Magnetic Resonance (NMR) Spectroscopy, and Gas Chromatography (GC), share a common problem: when a sample is removed for analysis, it may be altered or compromised resulting in significant analytical errors. The solution for this isContinue reading →
During Part I of his two part The Role of Process Analytical Technology (PAT) in Green Chemistry and Green Engineering online seminar series, Dominique Hebrault discussed scale-up challenges faced today by chemists and engineers. Too often, offline sampling methods – mostly chromatographic methods such as High Performance Liquid Chromatography (HPLC) or Gas Chromatography (GC) – are used to monitor processes which fail to resolve common issues like reaction monitoring, poor mass balance, delayed initiation/reaction stalled, and loss of yield/by-products. From a reaction engineering standpoint, obtaining heat mass balance information and preliminary kinetic data can be difficult using traditional offline methods during process scale-up. Forming the final solid can be challenging using traditional offline methods, including filtration/drying a bottleneck, excessive washing, polymorph inconsistency, and batch to batch variability can be difficult. Continue reading →
During the Recent Advances in Organic Chemistry seminar, Paul will discuss several recent publications by academia illustrating how real-time in situ Fourier Transform Infrared spectroscopy (FTIR) was used to help advance the fundamental understanding of organic chemistry. During this series, the following research areas have been discussed: Continue reading →