Legacy industrial processes for high purity chemicals and pharmacutical intermediates, for example, aqueous hydrogen peroxide, or USP calcium carbonate, have often not been updated with modern technology and process development due to inertia and lack of technology development. This leaves two distinct opportunitites: the first being reduction of cost of goods through novel design of catalysts and separation techniques, and the other being decarbonization though reduced environmental footprint and or the direct capture of CO<sub>2</sub> from the atmosphere. The focus of this talk will be the development in our group of new green process routes for the high purity production at least two compounds of broad interest - hydrogen peroxide from air and water and light, using molecular photocatalysis, and high purity calcium carbonate from recovered construction debris, which can recover CO<sub>2</sub> from the atmosphere. Several other compounds including sodium sulfate, and aniline are also being developed within the same context of green chemistry and engineering. We will discuss the technical features these processes and benchmark them against current production routes . The design of reactors and crystallizers for process intensification, as well as catalyst design and hybrid materials will be presnted with continuous production in mind, as related to reaction, separation, and precipitation kinetics.

Novel green chemistry routes to high purity intermediates - molecular design and process intensification

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ACS Fall 2022

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