I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator Briefs
Ethylene dichloride Recently, Chemetry (Moss Landing, Calif.; www.chemetrycorp.com) and Braskem…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Processing & Handling

Another potential outlet for glycerin

By Edited by Gerald Ondrey |

Hiroshi Abe and colleagues at Biochemical Group of Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (Tsukuba, Japan; www.aist.go.jp) have discovered a strain of acetic-acid bacteria (which normally oxidize ethanol into acetic acid) that effectively converts highly concentrated (22%) glycerin into D-glyceric acid. The researchers have developed a process to convert crude glycerin — a byproduct of biodiesel production, which contains up to 10% methanol and other impurities — into high-purity salt crystals of D-glyceric acid. In the process, crude glycerin is first heated under reduced pressure to remove methanol, then treated with activated charcoal to remove other organic impurities. The concentrated glycerin is then fermented with the bacteria for about six days, which yields about 90 g/L of D-glyceric acid. An ion-selective membrane process is then used to remove about 90% of the impurities from the fermentation broth, including unreacted glycerin, dihydroxyacetone (a byproduct), and other ingredients from the culture medium. The resulting solution contains about 200 g/L of the acid, which can then be precipitated as high-purity salt crystals by…
Related Content
Bio-based adipic acid
Adipic acid is a dicarboxylic acid that is widely applied to the production of nylon, polyurethanes, plasticizers and other polymers.…
More than beer is brewing
This year, the recipient of the Othmer Gold Medal is Kiran Mazumdar-Shaw, chairman and managing director of Biocon Ltd. (Bangalore,…
The Biogas Boom
It probably isn’t going to solve all the world’s energy needs, but producing biogas from waste can help slash the…

Andritz

The Influence of IIoT in the Dewatering Process Step of Pigment Production

Taking a look at dewatering, an important step at the heart of the colour pigment production process. By using a method for a calcined kaolin pigment as an example, we explain how an intelligent filter press can improve pigment production.

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
The influence of IIoT in the dewatering process step of pigment production
The Big 6 level measurement technologies, where to use them and why
Top five technologies for drying in chemical applications
Crude distillation unit (CDU) optimization
Upstream Oil & Gas: Automation intelligence from wellhead to distribution

View More