CMS membrane technology is the effective, easy to use, and low cost commercial solution for drying solvents past the azeotrope, to anhydrous levels – For scaling flow chemistry, enabling new chemistries, working with sensitive chemistries in small volumes, or reducing solvent costs and environmental footprint

CMS Solvent Recovery

CMS Membranes are

A simple, compact, & efficient way to turn burdensome waste into usable material.

Robust to virtually all chemicals, high temperatures, pressures, and additives.

Modular allowing recovery across a range of volumes.

Recoverable vs removed

  • Alcohols
  • Ketones
  • Esters
  • Ethers
  • Furans
  • Oils
  • Water
  • Methanol
  • Low MW acids
  • Dissolved gasses
  • O2' N2
  • CO2' CH4

The benefits of solvent recovery

with a CMS membrane using isopropyl alcohol generating 53,000 gallons of wet waste per year

1 year

payback time


recovery of spent solvent


saved in solvent for $10/gal IPA

Only 30 ft2

of factory floor space used


  • Decrease raw material cost
  • Improve efficiency of solvent exchange steps
  • Improve reactant conversion

Paint & Coatings

  • Decrease solvent costs
  • Increase efficiency of rinsing operations
  • Stay in regulatory compliance

Semicon. Production

  • Keep steady supply of IPA for rinsing
  • Keep water to proper levels in IPA
  • Decrease inventory of spent IPA

Bulk Chemicals

  • Boost final product value
  • Improve yield in equilibrium-limited reactions
  • Decrease downstream separation costs

Range of Solvents

Novel modular membrane-based systems 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.

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.

Drying past the azeotrope

CMS membranes dewater binary azeotrope-forming solvents like alcohols, making them a cost effective supplement or full-on replacement for distillation and other drying 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 material.

Why it matters

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.

In light of rising solvent costs, an increased interest in green chemistry, and greater attention to risks in managing hazardous the recovery of spent solvents is more critical and valuable than ever

Drying Solvent

How it works

A step change in technology and customer. Working by pervaporation, an energy efficient combination of membrane permeation and evaporation, membranes separate two or more components through a thin polymer film with an evaporative phase change comparable to a simple flash step.

They can remove even small quantities of water, to provide product that is 99.9+% free of water. Effective in harsh environments, highly chemical and thermal resistant, fouling resistant.

CMS membrane systems work alone or in conjunction with distillation, to effectively address a range of applications, materials, and existing processes

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.

Case Studies

Pharmaceutical Manufacturing Case Study

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.

Chevron CMS Pall rig

Industrial Alcohols for Chevron Case Study

Custom system configuration of CMS pervaporation modules, designed to dehydrate alcohols to anhydrous levels.  After lab testing customers’ proprietary alcohol mixture, CMS modules were deployed on customer’s site at a demonstration size, preceding full scale implementation. The demonstration size comprised four modules as seen in the photo and the system is currently operating above it’s predicted performance

Read our whitepaper on Solvent Dehydration

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