| UREA CASALE S.A. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120020928 | GRANULES CONTAINING FILAMENTARY FUNGI AND METHOD OF PREPARATION THEREOF - In a method for preparing granules containing filamentary fungi, a filamentary fungi culture is mixed with at least one modified starch and a starchy flour, then fillers and possible nutrients are added to the obtained product, obtaining a paste that is subsequently subjected to granulation and drying. | 01-26-2012 |
| 20110306791 | IMPROVEMENT TO THE HIGH-PRESSURE LOOP IN A PROCESS FOR SYNTHESIS OF UREA - A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop ( | 12-15-2011 |
| 20110212202 | Vibrating Prilling Bucket for Granulation of a Fluid Substance - A vibrating prilling bucket for granulation of a fluid substance, comprising a hub ( | 09-01-2011 |
| 20110124495 | PROCESS AND PLANT FOR THE PRODUCTION OF A UREA SOLUTION FOR USE IN SCR PROCESS FOR REDUCTION OF NOX - A process and a plant for the preparation of an acqueous solution of urea suitable for use in a SCR process for nitrogen oxides removal, wherein the urea solution from the recovery section of a urea plant is subject to at least one step of evaporation, separating a vapour stream containing water and ammonia, and obtaining a concentrated and substantially ammonia-free solution, and said concentrated solution is diluted to the concentration of urea suitable for use in the SCR process. | 05-26-2011 |
| 20110054169 | Process for Producing High-Quality Melamine from Urea - A process for high-pressure, liquid phase conversion of urea into melamine is disclosed, where molten urea is fed to a first reaction zone (S | 03-03-2011 |
| 20110003990 | PROCESS FOR THE PRODUCTION OF HIGH PURITY MELAMINE FROM UREA - The present invention concerns process for obtaining melamine at high purity characterized by comprising the steps of:—quenching a melamine melt, deprived of off-gases of the melamine synthesis and containing melamine impurities such as ammeline, ammelide and polycondensates, with an aqueous solution comprising ammonia under conditions such to substantially convert polycondensates into melamine, obtaining a melamine solution substantially free of polycondensates, recovering melamine from said melamine solution by melamine crystallisation, obtaining melamine crystals and a melamine crystallization mother liquor,—treating said crystallization melamine mother liquor under conditions such to convert at least a portion of its ammeline content into ammelide and melammine, obtaining a treated mother liquid having at least a reduced ammeline content. The invention also concerns a high-pressure non-catalytic plant for the production of high-purity melamine implementing the above process and apparatuses suitable to be used in this plant. | 01-06-2011 |
| 20100285214 | Fluid Bed Granulation Process and Apparatus - A fluid bed granulation process and apparatus, wherein a suitable fluid bed of a particulate material is maintained in a granulator ( | 11-11-2010 |
| 20100260876 | VIBRATING PRILLING BUCKET FOR GRANULATION OF A FLUID SUBSTANCE - A vibrating and rotating prilling bucket ( | 10-14-2010 |
| 20100210874 | Process and Plant for Urea Production - A process for producing urea is disclosed, wherein liquid ammonia and carbon dioxide are reacted in a high-pressure synthesis section ( | 08-19-2010 |
| 20100140827 | Fluid Bed Granulation Process - Fluid bed granulation process comprising the steps of: -forming a fluid bed of seeds (S | 06-10-2010 |
| 20100140543 | Process and Plant for the Production of an Aqueous Solution Comprising Urea - The present invention regards a process for the production of an aqueous solution comprising urea for use in the removal of nitrogen oxides from combustion gas or fumes, the process being characterised in that it comprises the steps of: -subjecting at least a part of a urea-concentrated aqueous solution comprising residual free ammonia, obtained directly from or downstream of a recovery section of a plant for the production of urea, to washing with carbon dioxide, so obtaining a first vapour phase comprising carbon dioxide and optionally ammonia and a urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia, and -diluting said urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia with water until the desired concentration of urea in aqueous solution is reached. | 06-10-2010 |
| 20100095886 | Fluid Bed Granulation Process - A fluid bed granulation process of a predetermined substance comprises the steps of: forming, through a fluidification. air flow of predetermined flow rate, a fluid bed of granules of said substance to be granulated fed to it in the form of seeds,—feeding said fluid bed with a continuous flow of a growth substance (or liquid). | 04-22-2010 |
| 20100069631 | Integrated Process for Urea and Melamine Production - In an integrated process for urea and melamine production, urea is produced in a urea plant ( | 03-18-2010 |
| 20100063321 | Process for Urea Production and Related Plant - A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the steps of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section and of using at least a part of the condensed steam, obtained by indirect thermal exchange with a second part of said aqueous solution comprising urea, ammonium carbmate and ammonia in a high-pressure stripping unit, as a heating fluid for the dissociation of the first part of the aqueous solution comprising urea, ammonium carbmate and ammonia in the medium-pressure treatment section. | 03-11-2010 |
| 20090220396 | Plant for Urea Production - Plant for urea production from ammonia and carbon dioxide having a so-called high-pressure section which comprises a synthesis reactor and a condensation unit ( | 09-03-2009 |
| 20090124830 | Process for Urea Production and Related Plant - A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section. | 05-14-2009 |
| 20080299305 | Fluid Bed Granulation Process - A fluid bed granulation process of a predetermined substance comprises the steps of: forming, through a fluidification. air flow of predetermined flow rate, a fluid bed of granules of said substance to be granulated fed to it in the form of seeds, —feeding said fluid bed with a continuous flow of a growth substance (or liquid). | 12-04-2008 |
| 20080242890 | Method for Modernizing a Urea Production Plant - A method for modernizing a urea production plant including a urea synthesis reactor, a stripping unit and at least one condensation unit. The method includes providing: means in the condensation unit for substantially condensing at least a portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the stripping unit; a second stripping unit; means for feeding a first portion of a reaction mixture flow comprising urea, carbamate and free ammonia in aqueous solution leaving the reactor to the first stripping unit; means for feeding a second portion of the reaction mixture flow leaving the reactor to the second stripping unit; and means for feeding at least a portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the second stripping unit directly to the synthesis reactor. A de-bottlenecking of the high-pressure section downstream of the synthesis reactor may be achieved, improving production capacity. | 10-02-2008 |
| 20080219900 | Process for Urea Production and Related Plant - A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor ( | 09-11-2008 |
