Process for workup of mixed acid and wastewater from the nitration of aromatics and apparatus for performing the process

Process and device for recycling waste acid produced in process of producing zoalene

Method and system for producing nitrobenzene

Process for producing sulfuric acid with low levels of nitrogen oxides

Method and plant for reprocessing waste sulphuric acids from nitration processes

Method and system for concentrating waste sulphuric acids from nitration processes

Process for the coupled production of chlorline and isocyanates