Susan E Lundquist

US Patent:

6436294, Aug 20, 2002

Filed:

Nov 24, 1998

Appl. No.:

09/199296

Inventors:

Susan H. Lundquist - White Bear Township MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B01D 1504

US Classification:

210674, 210679, 210682, 210688, 502408, 521 26

Abstract:

A process for modifying a medium is disclosed that includes treating a medium having a metal ion sorption capacity with a solution that includes: A) an agent capable of forming a complex with metal ions; and B) ions selected from the group consisting of sodium ions, potassium ions, magnesium ions, and combinations thereof, to create a medium having an increased capacity to sorb metal ions relative to the untreated medium.

US Patent:

59894342, Nov 23, 1999

Filed:

Oct 31, 1997

Appl. No.:

8/960528

Inventors:

Susan H. Lundquist - White Bear Township MN
Lloyd R. White - Minneapolis MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B01D 1504

US Classification:

210679

Abstract:

A method for removing metal ions from solution comprises the steps of providing titanate particles by spray-drying a solution or slurry comprising sorbent titanates having a particle size up to 20 micrometers, optionally in the presence of polymer free of cellulose functionality as binder, said sorbent being active towards heavy metals from Periodic Table (CAS version) Groups IA, IIA, IB, IIB, IIIB, and VIII, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size distribution in the range of 1 to 500 micrometers. The particles can be used free flowing in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove metal ions from aqueous or organic liquid.

US Patent:

59353805, Aug 10, 1999

Filed:

Aug 27, 1997

Appl. No.:

8/918113

Inventors:

Lloyd R. White - Minneapolis MN
Susan H. Lundquist - White Bear Township MN

Assignee:

3M Innovative Properties Company - St. Paul MI

International Classification:

B01D 118

US Classification:

159 481

Abstract:

A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles in a liquid, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size in the range of 1 to 500 micrometers, said particles being active towards Cs ions. The particles, which can be of a single salt or a combination of salts, can be used free flowing, in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove Cs ions from aqueous solutions.

US Patent:

60936649, Jul 25, 2000

Filed:

Jul 20, 1999

Appl. No.:

9/357677

Inventors:

Lloyd R. White - Minneapolis MN
Susan H. Lundquist - White Bear Township MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B32B 502
B01D 3908

US Classification:

442121

Abstract:

A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles in a liquid, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size in the range of 1 to 500 micrometers, said particles being active towards Cs ions. The particles, which can be of a single salt or a combination of salts, can be used free flowing, in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove Cs ions from aqueous solutions.

US Patent:

58977791, Apr 27, 1999

Filed:

Feb 13, 1997

Appl. No.:

8/791205

Inventors:

Eric E. Wisted - Apple Valley MN
Susan H. Lundquist - White Bear Township MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B01D 6100

US Classification:

210651

Abstract:

A cartridge device for removing an analyte from a fluid comprises a hollow core, a sheet composite comprising a particulate-loaded porous membrane and optionally at least one reinforcing spacer sheet, the particulate being capable of binding the analyte, the sheet composite being formed into a spiral configuration about the core, wherein the sheet composite is wound around itself and wherein the windings of sheet composite are of sufficient tightness so that adjacent layers are essentially free of spaces therebetween, two end caps which are disposed over the core and the lateral ends of the spirally wound sheet composite, and means for securing the end caps to the core, the end caps also being secured to the lateral ends of the spirally wound sheet composite. A method for removing an analyte from a fluid comprises the steps of providing a spirally wound element of the invention and passing the fluid containing the analyte through the element essentially normal to a surface of the sheet composite so as to bind the analyte to the particulate of the particulate-loaded porous membrane, the method optionally including the step of eluting the bound analyte from the sheet composite.