Composite material
AssigneePorvair Filtration Group Limited
InventorsMozamal Nazir, Eric Pert, Kevin Quinlan, Richard Taylor
Life of this patent
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Abstract
A porous formed composite material comprising: (i) a polymer, or a mixture thereof, said polymer having immobilised therein (ii) an insoluble sorbent material selected from the group consisting of: (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel; and (b) polyvinyl lactam-modified silica gel; is described. Solid phase extraction apparatus incorporating the material and its use in removing polyphenols and/or proteins from beverages to prevent the formation of haze in beverages are also described.
Claims20
A porous formed composite material comprising:
- (i) a polymer selected from polyethylene, polypropylene, and a mixture thereof, and:
- (ii) an insoluble sorbent material selected from the group consisting of:
- (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel;
- and
- (b) polyvinyl lactam-modified silica gel;
- the formation process causing the polymer (i) and insoluble sorbent material (ii) to be formed into a rigid unitary body such that the insoluble sorbent material is immobilised into the structure of the rigid unitary body.
A method of manufacturing the porous formed composite material, the method comprising mixing:
- (i) a polymer selected from polyethylene, polypropylene, and or a mixture thereof, and:
- (ii) an insoluble sorbent material selected from the group consisting of:
- (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel;
- and
- (b) polyvinyl lactam-modified silica gel;
- to form a rigid unitary body wherein the insoluble sorbent material is immobilized into the rigid unitary body.
A method of removing a substance selected from a polyphenol, a polypeptide and a protein from a beverage, the method comprising passing the beverage through a porous formed composite material comprising:
- (i) a polymer selected from polyethylene, polypropylene, and a mixture thereof, said polymer having immobilised therein:
- (ii) an insoluble sorbent material selected from the group consisting of:
- (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel;
- (b) polyvinyl lactam-modified silica gel;
- and
- (c) silica gel.
A method of preventing the formation of haze in a beverage, the method comprising passing the beverage through a porous formed composite material comprising:
- (i) a polymer selected from polyethylene, polypropylene, and a mixture thereof, said polymer having immobilised therein
- (ii) an insoluble sorbent material selected from the group consisting of:
- (a) a cross-linked vinyl lactam homopolymer or copolymer, said homopolymer or copolymer being optionally mixed with silica gel;
- (b) polyvinyl lactam-modified silica gel;
- and
- (c) silica gel.
A method of removing a metal ion from a solution, the method comprising passing the solution through a porous formed composite material comprising:
- (i) a polymer selected from polyethylene, polypropylene, and a mixture thereof, said polymer having immobilised therein:
- (ii) an insoluble sorbent material selected from the group consisting of:
- (a) a cross-linked vinyl lactam homopolymer or copolymer, said vinyl lactam homopolymer or copolymer being optionally mixed with silica gel;
- (b) polyvinyl lactam-modified silica gel;
- and
- (c) silica gel.
Dependencies are inferred from the claim text.