Casale Sa

Pierdomenico Biasi

Sergio Panza

Ermanno Filippi

Raffaele Ostuni

Leonardo Marrone

Francesco Baratto

Jean François Granger

Alberto Benedetti

Giada Franceschin

Davide Carrara

Cristina Pizzolitto

Jean Francois Granger

Reactor for catalytic chemical reactions comprising a catalyst bed with an annular-cylindrical form crossed by a radial flow or mixed axial-radial flow, wherein the bed is delimited by cylindrical walls made gas-permeable by means of slits and the catalyst bed is formed by particles of catalyst with a nominal minimum size such that: the ratio between a transverse dimension of the slits and the nominal minimum size of the particles of catalyst is smaller than or equal to 0.6; the catalyst bed contains no more than 3% by weight of particles with an actual size smaller than said nominal size.

Radial or axial-radial chemical reactor with a fine catalyst

A process for the production of biuret from urea wherein: a urea aqueous solution () withdrawn from the recovery section of a urea plant is processed to remove water and obtain a concentrated urea melt (); said urea melt is processed under biuret-forming conditions to decompose urea into biuret and ammonia and obtain a high-biuret urea melt (); said high-biuret urea melt () is diluted with water or with an aqueous stream obtaining a solution (); the solution () is subject to crystallization and precipitation of a solid phase containing biuret which is separated from the aqueous phase.

Process for producing biuret from urea

A multi-bed catalytic converter comprising: a plurality of catalytic beds which are traversed in series by a process gas, sequentially from a first catalytic bed to a last catalytic bed of said plurality, and at least one inter-bed heat exchanger () positioned between a first catalytic bed and a second catalytic bed of said plurality, wherein at least the last catalytic bed of said plurality is adiabatic and is made of fine catalyst with a particle size not greater than 2 mm.

Multi-bed catalytic converter

Integrated process for the synthesis of ammonia and nitric acid, comprising a synthesis of nitric acid including the following steps: a) subjecting a stream of ammonia () to catalytic oxidation, obtaining a gaseous stream containing nitrogen oxides (); b) subjecting said gaseous stream to a process of absorption of nitrogen oxides, providing nitric acid () and a tail gas () containing nitrogen and residual nitrogen oxides; c) subjecting at least a portion of said first tail gas () to a process of removal of nitrogen oxides, providing a nitrogen oxides-depleted tail gas (), and comprising a synthesis of ammonia by catalytic conversion of a make-up gas () comprising hydrogen and nitrogen in an ammonia synthesis loop, wherein at least a portion () of said second tail gas is used as nitrogen source for obtaining said make-up gas ().

Process for nitric acid production

Growing community of inventors

Como, Italy

Pierdomenico Biasi