Back to results
US 3,947,612 AGranted
Method of forming active surfaces on solids
AssigneeNorddeutsche Affinerie Aktiengesellschaft
InventorReinhold Schulze
Life of this patent
Estimating the term…
Abstract
A method of forming an active surface on a solid, e.g. for use of the solid as an adsorbent, catalyst carrier or contact or reactant catalyst, comprising adding a mixture of binders to a solution or suspension of an activatable substance (reactant), the binder mixture containing water-insoluble synthetic-resin substances which can be swelled by water only to a limited extent.
Claims1
A process for bonding a particulate active solid consisting of calcium stannate to pieces of polystyrene substrate, which comprises:
- depositing said calcium stannate on the polystyrene from an aqueous medium containing essentially:
- a. at least one water-insoluble synthetic resin selected from the group which consists of copolymers of acrylic esters with styrene, vinyl ethers, vinyl esters, vinyl chloride, and vinylidene chloride, and
- b. at least one further synthetic resin, water-soluble or water-swellable substance serving as a flocculating agent for said calcium stannate, said flocculating agent being a polyacrylamide or a polyethylene imine, the ratio of said synthetic resin (a) to said flocculating agent (b) is water-soluble or within the range 10:1 to 1:10 where said flocculating agent is water-swellable.
Dependencies are inferred from the claim text.