I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chementator Briefs
Ultrathin membrane Researchers led by professors Hideto Matsuyama and Tomohisa…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUS
Focus on Sensors
Wireless transmitters save on level sensor installation Reduce the cost…
NEW PRODUCTS + Show More SHOW PREVIEWS

Comment

A very fast way to continuously synthesize zeolites

By Tetsuo Satoh |

For a long time, it has been believed that the crystallization of zeolites is, by nature, a very slow process. The hydrothermal synthesis of zeolites is normally performed batchwise, requiring crystallization times on the order of days. Now, Toru Wakihara and Tatsuya Ohkubo at the Dept. of Chemical System Engineering, University of Tokyo (Japan; www.zeolite.t.u-tokyo.ac.jp) have demonstrated the continuous-flow synthesis of the industrially important zeolite, ZSM-5. Crystallization from the amorphous state to full crystallinity could be completed in just a few seconds, which demonstrates that the time needed for crystallization is 3–4 orders of magnitude shorter than previously believed. The researchers say the fast synthesis offers a great potential for the mass-production of such materials, as well as deepening the fundamental understanding of zeolite formation. The continuous flow reactor has millimmeter-sized channels in which “well-tuned” precursors (at 90°C) are mixed with pressurized, preheated water at 370°C. This leads to the immediate heating of the precursors to 240–300°C, with subsequent, seed-free crystallization of ZSM-5 within tens of seconds, or fewer.
Related Content
A promising zeolite for ethylene separation
Scientists from ExxonMobil (Irving, Tex.; www.exxonmobil.com) and the Institute of Chemical Technology (ITQ; Valencia, Spain; http://itq.upv-csic.es) have discovered a new…

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
Improving chemical production processes with IIoT and AI technologies
New filtration technology for highly corrosive media
PTA production: Lowering OPEX without compromising on quality
Sure that zero means zero in your zero-liquid discharge (ZLD) process?
How separation processes profit from Industrial Internet of Things (IIoT) solutions

View More