Systems and methods for enhanced separation of H2S and NH3 in an H2S stripper using carbon dioxide and/or an inert gas.

A system for recovering ammonia from a gas stream is provided. The system includes a regenerator and a carbon dioxide wash station.

A system for recovering ammonia from a gas stream is provided. The system includes a regenerator and a carbon dioxide wash station.

A system for recovering ammonia from a gas stream is provided. The system includes a regenerator and a carbon dioxide wash station.

A system for recovering ammonia from a gas stream is provided. The system includes a regenerator and a carbon dioxide wash station.

A system for ammonia distillation may include a condenser to condense ammonia vapor into liquid anhydrous ammonia, a flush tank to receive a flushed portion of the liquid anhydrous ammonia, a collection tank to receive a collected portion of the liquid anhydrous ammonia, and a corrosion inhibitor dispenser to transfer a corrosion inhibitor to the collected portion of the liquid anhydrous ammonia to form corrosion-inhibiting liquid anhydrous ammonia.

A system for ammonia distillation may include a condenser to condense ammonia vapor into liquid anhydrous ammonia, a flush tank to receive a flushed portion of the liquid anhydrous ammonia, a collection tank to receive a collected portion of the liquid anhydrous ammonia, and a corrosion inhibitor dispenser to transfer a corrosion inhibitor to the collected portion of the liquid anhydrous ammonia to form corrosion-inhibiting liquid anhydrous ammonia.

A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.

A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.

The invention relates to a process for recovering ammonia from an initial aqueous mixture comprising ammonium ions and ammonium salts, the process comprising providing an initial aqueous mixture, desorbing ammonia using humid, heated air to obtain a desorbing liquid phase and a desorbing gas phase, separating the desorbing liquid phase, mixing the desorbing gas phase with a capture gas to obtain a gas mixture, and condensing the gas mixture to obtain a condensate comprising ammonium ions and salt, and an outlet gas. The desorbing liquid phase comprises ammonium ions and ammonium salts in a total concentration of less than 100 ppm. The capture gas comprises carbon dioxide in an amount of at least 50,000 ppm. The total concentration of ammonium ions and ammonium salts in the condensate is higher than the total concentration in the initial aqueous mixture. The invention further relates to a system for performing an ammonium recovery process, a composting system, a composting process and a system for composting and recovering ammonia.