US 12,239,972 B2
Radial or axial-radial chemical reactor with a fine catalyst
Sergio Panza, Como (IT); Pierdomenico Biasi, Como (IT); and Ermanno Filippi, Castagnola (CH)
Assigned to CASALE SA, Lugano (CH)
Appl. No. 17/278,486
Filed by CASALE SA, Lugano (CH)
PCT Filed Oct. 7, 2019, PCT No. PCT/EP2019/077019
§ 371(c)(1), (2) Date Mar. 22, 2021,
PCT Pub. No. WO2020/088886, PCT Pub. Date May 7, 2020.
Claims priority of application No. 18203181 (EP), filed on Oct. 29, 2018.
Prior Publication US 2022/0032251 A1, Feb. 3, 2022
Int. Cl. B01J 8/02 (2006.01); B01J 8/00 (2006.01); B01J 35/40 (2024.01); B01J 35/51 (2024.01); C01C 1/04 (2006.01)
CPC B01J 8/0214 (2013.01) [B01J 8/009 (2013.01); B01J 35/40 (2024.01); B01J 35/51 (2024.01); C01C 1/0435 (2013.01); B01J 2208/00805 (2013.01); B01J 2208/0092 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A reactor for catalytic chemical reactions, the reactor comprising:
a catalyst bed with an annular-cylindrical form and a radial or mixed axial-radial crossing flow;
at least a first cylindrical wall and a second cylindrical wall that delimit the catalyst bed being in direct contact with a catalyst, the second cylindrical wall being coaxial and internal relative to the first cylindrical wall;
wherein the first cylindrical wall and the second cylindrical wall include passages to make the first and second cylindrical walls gas-permeable;
wherein the passages are slits having an elongated form in a longitudinal direction of each slit of the slits and a respective transverse dimension in a transverse direction that is perpendicular to the longitudinal direction;
wherein the catalyst bed is formed by particles of the catalyst that have a nominal minimum size such that:
a) a ratio between the transverse dimension of the slits and the nominal minimum size of the particles of the catalyst is less than or equal to 0.6;
b) the catalyst bed contains no more than 3% by weight of particles with a size smaller than the nominal minimum size,
wherein the nominal minimum size of the particles of the catalyst is defined as a square root of a maximum square free flow area of a sieve that retains the particles of the catalyst, sieving of the particles of the catalyst being performed according to the standard test method of ASTM D4513-11.