Casale Sa

Luca Rugnone

Raffaele Ostuni

Francesco Nettuno

A method and system for measuring a liquid level in a pressure vessel, the method comprising: transmitting an electromagnetic signal through a wave guide in the form of an elongate solid rod () with bottom end immersed in the liquid and detecting a signal generated by the reflection on the surface of the liquid.

Method and system for measuring a liquid level in a pressure vessel of a urea synthesis plant

A process for the production of ammonia and urea in an ammonia-urea integrated plant comprising an ammonia section and a tied-in urea section, wherein a hydrocarbon is reformed to produce ammonia make-up synthesis gas; said make-up gas is purified by shift conversion and removal of carbon dioxide; carbon dioxide is removed from the make-up gas by a first and a second CO2 removal sections; the first section removes CO2 by absorption with a suitable medium, and the second section removes CO2 by washing with a carbamate solution taken from the urea section; the make-up gas is reacted to produce ammonia; the CO2 removed from the make-up gas and at least part of the ammonia are used to produce urea.

Ammonia-urea integrated process and plant

A process and system for removing ammonia from ammonia-containing purge gas of a urea plant, the process comprising: contacting said ammonia-containing purge gas with carbon dioxide at a low temperature, reaction of ammonia to form crystals of ammonium salts in a multiphase stream, and removal of the solid ammonium salts from the multiphase stream.

Process and system to capture ammonia from a purge gas of a urea plant

A shell-and-tube stripper for carbamate decomposition and ammonia recovery from a urea solution comprising a bundle of heated tubes, said tubes being fed with said urea solution and carbon dioxide as stripping medium, the urea solutions forming a liquid falling film on the internal surface of the tubes and the carbon dioxide forming a counter-current gaseous flow; said tubes comprise an external layer made of super austenitic or super duplex stainless steel and an internal layer made of zirconium, said internal layer reaching temperatures higher than 220&#xb0; C.

Urea process with high-temperature stripping

A process for making a combined fertilizer comprising a first nitrogen-based fertilizer, such as urea or ammonium nitrate, and one or more further components chosen among: nitrogen-based fertilizers, being different from the first nitrogen-based fertilizer and nutrients, wherein the combined fertilizer is made by a process of granulation in a fluid bed, the fluid bed being preferably in a vortex condition.

Process for the production of combined fertilizers

Integrated process for the production of urea and urea-ammonium nitrate, comprising: reacting ammonia and carbon dioxide to form a reaction mixture () containing urea and unconverted materials, and also comprising the recovery of unconverted materials in a first recovery stage at a first pressure and in a second recovery stage at a second pressure, wherein ammonia-containing offgas () released by said second recovery stage are condensed at said second pressure, and said condensed offgas () are recycled to said first recovery stage.

Process for integrated production of urea and urea-ammonium nitrate

A combined reactor and condenser for the synthesis of urea from ammonia and carbon dioxide, including a condenser section coupled to a reaction section, comprising inputs directed to said condenser section for a gaseous stream comprising ammonia and carbon dioxide and for a solution containing ammonium carbamate and liquid ammonia, and wherein the effluent of the condenser section is sent to the reaction section; the reaction section comprises a plurality of compartments and a plurality of mixers, at least one inside each of said compartments.

Reactor-condenser for the synthesis of urea

The invention discloses the use of Raman spectroscopy to analyze one or more process streams () of a urea synthesis production plant, where urea is synthesised from ammonia and carbon dioxide at high pressure (100-300 bar) and high temperature (50-250&#xb0; C.). The radiation generated by the Raman scattering is analyzed to determine the concentration of components such as urea, ammonia and carbon dioxide in the process streams (). A logic system implemented in a plant control unit () generates signals to target plant actuators to optimize the operation.

Growing community of inventors

Como, Italy

Luca Rugnone