CMS membrane technology is the effective, easy to use, and low cost commercial solution for drying solvents past the azeotrope, to anhydrous levels – For example, you could dehydrate your TBHP solution, enabling you to scale up new chemistries
Compact Membrane Systems has developed a novel modular membrane-based technology that can dry a broad range of solvents to anhydrous levels, enabling solvent recycling in a broad range of applications where other recycling options fall short. Solvents can be cost effectively dried to the level of virgin materials, purified and reused onsite, rather than disposing. CMS technology works effectively with many commonly used solvents of all types, including mixtures containing tert-butyl hydroperoxide (TBHP), isopropyl and other alcohols as well as solvents with large release volumes, such as methyl ethyl ketone, tetrahydrofuran, butanol, ethanol, toluene, xylene, and ionic liquids.
For a brief, quantitative overview of what we can do feel free to check out our on one page info-graphic on membrane-based solvent recovery.
Some solvents are recovered and reused, while others are destroyed or resold due to the cost or challenge in recovering them to the necessary purity.
CMS membranes have the ability to dewater azeotropic solvents like alcohols, making them a cost effective add-on to distillation, and other technologies, in printing, electronics, fine chemicals, pharmaceutical and other applications.
CMS technologies can dehydrate isopropyl alcohol (and others) to 99.5+%, recovering the solvent at a fraction of the cost of purchasing new solvent.
In the face of rising solvent costs, increased interest in green chemistry, and greater attention to risks in managing and transporting hazardous waste, recovering spent solvents is more critical and valuable than ever.
CMS membrane technology represents a step change in both the state of the art and value proposition to the customer. Working by pervaporation, an energy efficient combination of membrane permeation and evaporation, membranes separate two or more components by differing rates of diffusion through a thin polymer film with an evaporative phase change comparable to a simple flash step.
CMS membranes are most effective where water is the minor component and processed volumes are less than 5000 gallons per day. They can remove even small quantities of water, to provide product that is 99.9+% free of water. CMS membrane modules can be used in harsh environments because of their high chemical and thermal resistance. They also resist fouling and thus are easier to operate and maintain than alternative dewatering systems. The membrane is easy to clean because the material of construction is inert.
CMS membrane systems can work in conjunction with distillation, to dry solvents to anhydrous levels, once solids and bulk water are removed via traditional separation methods like distillation.
Please note that membranes are not 100% impermeable barriers: small quantities of the desired product, whether solvent or oil, will pass through the membrane. All systems are designed to capture and address these materials.
Read our whitepaper on Solvent Dehydration
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CMS recently designed and built a small system for a major pharmaceutical contractor. The unit removed water from TBHP, a very important oxidizing agent in process chemistry. To find out more see the full case study. A journal article in the May 2018 issue of Organic Process Research and Development (OPR&D). Please follow this link to read the full article, made possible by the paper’s selection as the ACS Editor’s Choice paper of the day.