Patent ID: 7122162

Claim:
A reaction chamber ( 4 ) elongated along an essentially vertical axis for circulating at least one reaction fluid comprising a liquid phase from top to bottom comprising at least one catalyst bed ( 5 ), disposed in said chamber below said catalyst bed ( 5 ), at least one means ( 1 ) for introducing at least one gaseous quenching fluid into contact with said at least one reaction fluid in said reaction chamber, and below said means ( 1 ) for introducing said at least one gaseous quenching fluid, at least one box ( 8 ) for further contact, mixing and quenching of said at least one reaction fluid and said at least one gaseous quenching fluid, having a primary dimension (D) and a height (H 1 ), said at least one box comprising at least one passage section ( 9 ) for common entry of said previously contacted fluids into said box ( 8 ), and below said passage section ( 9 ), said box ( 8 ) comprises vortex means ( 11 ) for providing vortex motion of fluids in said box ( 8 ) in a direction essentially non-radial and non-parallel to the axis of said chamber, and comprising, below said vortex means ( 11 ), at least one passage section ( 10 ) for output of fluid mixture formed in said box ( 8 ).