Continuous system for providing a catalytic coating on support members
AssigneeUniversal Oil Products Company
InventorsWilliam A. Hoyer, Lowell W. Johnson, Richard J. Schoenenberger
Life of this patent
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Abstract
A processing system which can provide a continuous assembly-line procedure for placing a catalytic coating on ceramic honeycomb type members embodies the use of a plurality of pressure tight chambers such that each ceramic member can be vacuum treated and then rapidly coated, as well as pressure treated and air blown to effect rapid coating fluid removal and partial drying. After each coating operation, there is controlled drying and high temperature curing. Also, in a preferred controlled system, there is a weighing of each element before and after each coating step to determine an amount of coating retained for comparison with a predetermined standard.
Claims7
A processing system which can provide for a continuous assembly-line procedure in effecting the placement of a catalytic coating on batches of particulated refractory members, which comprises the steps of:
- a. placing each batch of particulated refractory members within a perforated wall containing means permitting fluid flow therethrough and around the members;
- b. sequentially placing each batch of contained members into a pressure tight, confined chamber and supporting them therein to preclude blockage of fluid flow through the containing means and around the members;
- c. evacuating said chamber to effect a vacuum in the pores of said refractory members;
- d. subsequently filling said chamber with an aqueous treating media containing a catalytically active component to coat and fill the pores of said members;
- e. draining said treating media from said confined chamber and then subsequently blowing pressurized air therethrough to remove excess media from said chamber and from the surface of said members;
- f. sequentially effecting the removal of the thusly coated batches of members from said chamber;
- g. sequentially passing each of the resulting batches of coated members to a drying and heat treating zone to effect the high temperature curing thereof;
- and
- h. effecting the removal of the resulting catalytically impregnated members.
Dependencies are inferred from the claim text.