Patent ID: 6746716
Filing Date: 2004-06-08
Classification: B01J,C04B

Abstract:
A process for coating a cylindrical carrier structure with a predetermined amount of target take-up of a coating suspension, wherein the predetermined amount of target take-up is comprised of a first amount of target take-up and a second amount of target take-up, the carrier structure has a cylinder axis, two end faces, wherein said two end faces comprise a lower end face and an upper end face, an encasing surface, an axial length L and a large number of channels running from the lower end face to the upper end face, said process comprising:a) vertically aligning the cylinder axis of the carrier structure and filling an empty volume in the channels with a coating suspension up to a predetermined filling height H1 starting from the lower end face; b) removing excess coating suspension through the lower end face of the carrier structure down to the first amount of target take-up; c) turning the carrier structure 180Â° so that the upper end face and lower end face are exchanged one for the other; and d) repeating steps a) and b), wherein a filling height H2 up to which the channels are filled in this case is given by H2=Lâˆ’xÂ·H1, where x is between 0.8 and 1.0 and when repeating step b) excess coating is removed down to the second amount of target take-up.