Process for working up mixed acid and waste water from the nitration of aromatics and device for carrying out the process
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Process for the treatment of waste sulfuric acid and apparatus for carrying out the process
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Dephlegmator system for reducing the sulfuric acid content in the wastewater in the concentration of sulfuric acid
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Process and plant for purifying and concentrating waste acid from nitriding processes
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Process for purifying and concentrating HF-containing sulfuric acid
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Evaporator
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Device for purification of waste sulfuric acid
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Process for the adiabatic nitration of benzene
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Bubble mixer for mixing two liquids, which are not miscible with one another and have different density, useful as reactor for washing process, comprises vertical cylindrical pipe, whose lower end is closed and equipped with emptying line
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Apparatus for recovering pure sulfuric acid by evaporation, includes corrosion- and thermal stress-resistant heat exchanger with silicon-containing cast steel inner tube and steel outer tube
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Sulfuric acid concentrating involves obtaining sulfuric acid under atmospheric pressure, which has higher temperature than boiling point of acid corresponding to atmospheric pressure
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Vapor condenser for treating multi-component systems, e.g. in concentration of sulfuric acid, has encased chamber divided into tube-free and tube-containing regions
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Apparatus for cleaning waste sulphuric acid
DE102007013983B3
Device for the purification of waste sulfuric acid, comprises reactor, circulation pump, vertically or horizontally arranged heat exchangers having inner and outer tubes, mixer for oxidation agent and the acid, and connection pipelines
DE102006013579B3
Reducing the waste water quantity during dinitrotoluene production, and optimizing the waste water quality comprises stripping the waste acid and pre-purified waste acid, saturating the sulfuric acid and purifying the nitrous gases
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Process for the high concentration of nitric acid with sulfuric acid
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Microreactor for nitration with a mixture of nitric and sulfuric acids comprises polytetrafluoroethylene components that can be connected to polytetrafluoroethylene tubes with clamping nuts
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Lifting device, for distillation column, removes individual column shots from column having several shots
