I D
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Nanofiltration Toray Industries, Inc. (Tokyo, Japan; www.toray.com) has created what…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment PDF Processing & Handling

An alternative to chlor-alkali

By Chemical Engineering |

Earlier this year, NSR Technologies (Decatur, Ill.; www.nsr-tech.com) commercialized its patented process for producing potassium hydroxide (45–50 wt.%) and dilute hydrochloric acid via a membrane separations technology. The company’s flagship production facility in Decatur, Ill. is the first commercial application of this process says Dr. Kris Mani, NSR’s president and CEO. Current producers of commercial strength KOH manufacture it via the chlor-alkali route. NSR uses a membrane electrodialysis (ED) process to convert salt to value-added chemicals. Sodium chloride and potassium chloride are converted to the corresponding acid and alkalis: HCl; and sodium hydroxide and KOH (caustic potash). The process, which occurs in an aqueous medium, uses ion exchange membranes and an electrical driving force to effect the separation and rearrangement of the raw material into the acid and alkali products. The requisite membranes are assembled in NSR’s proprietary IonSel cell stacks. Additional processing steps, such as ion exchange, chromatography and evaporative concentration, are used as required to obtain products of commercial strength and purity. NSR’s production process is more energy efficient than the chlor-alkali…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
How separation processes profit from Industrial Internet of Things (IIoT) solutions
Up to 80% increased production rates in plastic recycling
Higher throughput and purity in sodium bicarbonate production with up to 15% less energy consumption
Help feeding nations with chemical filtering technologies
Not at the forefront of Industry 4.0?

View More

Live chat by BoldChat