I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Separation Processes

Modular Process Design: Chemical and Thermal Recycling of Acids

By Kevin Schnabel, Sebastian Bialek, Peter Pataky and Max Heinritz-Adrian |

In order to recycle spent acids from different applications, a design approach based on different process modules gives operators the flexibility needed to handle different contaminants Spent or waste acids (SA) containing sulfuric or nitric acid are a byproduct of various processes involving nitration or sulfonation reactions or of processes, in which these acids are used for leaching or as a catalyst. These reactions and processes are used in the industrial production of polymers, drugs, pigments, other specialty chemicals, explosives, battery chemicals or metallurgical products. The SA from such industries is diluted by reaction water and contaminated with organic and inorganic compounds. Stricter environmental regulations and rising raw-material prices in recent years have led to considerable cost and organizational effort for the procurement of fresh acid and the disposal of SA. An effective acid-recycling system can contribute to a more cost-efficient, independent and environmentally friendly production process. A challenge for recycling systems, however, is the wide variety of production processes and the resulting SA with partly unknown contaminants. Chemical and thermal recycling of SA consists of various steps and the…
Related Content
Acid Recovery Becomes the Norm
As environmental and transportation regulations become more stringent around the world, treating spent acids is becoming less of an option…

Andritz

Minimizing particle breakage and mother liquor residue in technical salts production

Technical salts and crystallization products have found a broad spectrum of different applications in the industrial sector in the past decades. One of the most frequently used salts is sodium chloride...

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
Expectations are shifting: How measurement solutions can help overcome chemical industry challenges
CoriolisMaster: The SmartSensor solution
ABB in Chemical Industry
6 benefits to expect from a measurement partner
Expect more from your measurement with ABB

View More