| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423356000 | From ammonium compound | 6 |
| 20090191113 | METHOD FOR REMOVING AMMONIA FROM A METHANOL CONTAINING STREAM - A stream of liquid methanol containing ammonia and other species is sent to the top of a countercurrent stripping column. The stream is stripped with a flow of ambient-temperature nitrogen or another inert gas. The column can be packed with random dumped packing. The overhead vapor contains ammonia and the liquid exiting the column has a reduced amount of ammonia. Removing ammonia can reduce or prevent fouling or corrosion caused by ammonia (and other compounds). | 07-30-2009 |
| 20110044879 | PROCESS FOR THE TREATMENT AND PURIFICATION OF DANGEROUS WASTES CONTAINING AMMONIUM SALTS, PARTICULARLY AMMONIUM CHLORIDE, DERIVED FROM PHARMACEUTICAL AND CHEMICAL TECHNOLOGIES - The invention relates to a process for the treatment and purification of dangerous wastes containing ammonium salts, particularly ammonium chloride, derived from pharmaceutical and chemical technologies. The process includes the following steps: removing the organic solvent content of the waste mixture, containing an aqueous and non-aqueous phase, by phase separation based on the difference in the special weight and/or by azeotrop distillation, and heating the obtained aqueous solution at its boiling point or at a temperature belonging to the maximal saturation boiling point of the ammonium salt until the non-solvent type organic substances precipitate in the form of a well separable polymerisate phase, whereafter this phase is separated from the aqueous solution of the ammonium salt and the ammonium salt, preferably the ammonium chloride is purified by a method known per se. | 02-24-2011 |
| 20110091369 | METHOD FOR THE RECOVERY OF AMMONIA FROM A GASEOUS STREAM IN A SYNTHESIS PROCESS OF UREA - The present invention relates to a process for the recovery of ammonia contained in a gaseous purging stream produced in a synthesis process of urea, comprising the following phases: a) subjecting the gaseous purging stream to a washing with an aqueous acidic solution, at a pH ranging from 1 to 6, with the formation of a first purified gaseous stream and an aqueous solution containing an ammonium salt; b) subjecting the aqueous solution containing the ammonium salt coming from phase a) to stripping, after treatment with a strong base, at a temperature ranging from 50 to 250° C. and a pressure ranging from 1 to 40 absolute bar, with the formation of a second gaseous stream comprising NH | 04-21-2011 |
| 20120189528 | PROCESS AND APPARATUS FOR RECOVERING AMMONIA FROM A GAS STREAM - The present invention relates to a process for the recovery of ammonia contained in a gaseous stream, said process comprising the following phases: (a) subjecting the gaseous stream containing ammonia to a washing with an aqueous washing solution having a pH lower than 7.0, with the formation of a purified gaseous stream and an aqueous solution containing an ammonium salt; (b) treating the aqueous solution containing the ammonium salt coming from phase (a) in a vertical falling film heat exchanger at a temperature from 50 to 250° C. and an absolute pressure ranging from 50 KPa to 4 MPa with the formation of a regenerated washing solution and a gaseous stream comprising NH | 07-26-2012 |
| 20120258033 | METHOD FOR SYNTHESIZING AMMONIA - To provide a sustainable method for the synthesis of ammonia from nitrogen by low resources and low energy. | 10-11-2012 |
| 423357000 | Utilizing calcium compound | 1 |
| 20150132210 | GASEOUS AMMONIA REMOVAL SYSTEM - A system and method for passive capture of ammonia in an enclosure containing material that gives off ammonia. The invention allows for the passage of gaseous NH | 05-14-2015 |
