# US 5,702,610 A · Sheet materials for solid phase extractions and solid phase reactions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,702,610 A - Document ID: US5702610A - Status: Granted - Kind: A - Application number: 08/586,937 - Filed: 1996-01-09 - Granted: 1997-12-30 - Earliest claimed: 1993-12-22 - Assignees: Minnesota Mining and Manufacturing Company - Inventors: Donald F. Hagen; Simon S. Fung; Paul E. Hansen - Web page: https://patentgrep.com/patent/US5702610A ## CPC - B01J 20/28033: {Membrane, sheet, cloth, pad, lamellar or mat} - B01D 15/00: Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor - B01D 15/08: Selective adsorption, e.g. chromatography - B01J 20/28004: {Sorbent size or size distribution, e.g. particle size} - B01J 20/28028: {Particles immobilised within fibres or filaments} - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A sheet article for solid phase extraction or solid phase reaction comprises at least one sorptive polymer pulp, and optionally at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid comprising the step of passing a fluid comprising an analyte through a sheet article comprising poly(p- or m-phenylenephthalamide) pulp, the pulp optionally having incorporated therein solid phase particulates, the sheet article being capable of isolating the analyte from the fluid. ## Claims ### Claim 1 A method comprising the step of passing a fluid containing an analyte through a solid phase extraction or reaction sheet article comprising at least one sorptive polymer pulp which is substantially nonswellable, and at least one of sorptive and reactive particulates enmeshed therein, said polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or polyacrylonitrile pulp or fibrillated polytetrafluoroethylene, and 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said sheet being prepared by a wet-laid process, wherein in said method said analyte becomes sorbed or reacted and becomes bound to at least one of said polymer pulp and said particulates in said sheet article. ### Claim 2 (depends on 1) The method according to claim 1 further comprising the step of eluting or thermally desorbing said analyte from said sheet article. ### Claim 3 (depends on 2) The method according to claim 2 further comprising the step of repulping the sheet article from which said analyte has been removed. ### Claim 4 (depends on 1) The method according to claim 1 wherein said analyte is a contaminant. ### Claim 5 (depends on 4) The method according to claim 4 wherein said contaminant comprises at least one of oil and grease. ### Claim 6 (depends on 4) The method according to claim 4 wherein said contaminant comprises at least one member of the group consisting of semi-polar phenolics, polynuclear aromatics, and volatile organic compounds. ### Claim 7 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of aramid pulp or a derivative thereof. ### Claim 8 (depends on 7) The method according to claim 7 wherein said aramid pulp consists essentially of chemically modified poly(p- or m-phenylenephthalamide). ### Claim 9 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of poly(p- or m-phenylenephthalamide) or a derivative thereof. ### Claim 10 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of a blend of polyacrylonitrile and polyolefin pulps. ### Claim 11 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of a blend of polymer pulps. ### Claim 12 (depends on 11) The method according to claim 11 wherein said polymer blend of said article consists essentially of aramid polymer pulp with polyolefin pulp. ### Claim 13 (depends on 11) The method according to claim 11 wherein said polymer pulp consists essentially of a blend of aramid pulp or a derivative thereof and polyolefin or polyacrylonitrile pulp which are present in the range of 1 to 100 weight percent to 0 to 99 weight percent, respectively. ### Claim 14 (depends on 1) The method according to claim 1 wherein said aramid pulp of groups 1) and 2) of said article consists essentially of poly(p- or m-phenylenephthalamide) and said polyolefin pulp of group 3) is selected from the group consisting of polyethylene and polypropylene. ### Claim 15 (depends on 1) The method according to claim 1 wherein said polymer pulp consists essentially of aramid pulp or derivatives thereof and fibrillated polytetrafluoroethylene. ### Claim 16 (depends on 1) The method according to claim 1 wherein said particulates of said sheet article are selected from the group consisting of alumina, silica, zirconia, and derivatives thereof. ### Claim 17 (depends on 1) The method according to claim 1 wherein said particulates are selected from the group consisting of polymeric organic resins, ion exchange particles, chelation particles, chiral particles, and hydrophobic molecular sieves. ### Claim 18 (depends on 1) The method according to claim 1 wherein said particulates comprise styrene divinylbenzene or a derivative thereof. ### Claim 19 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of an aramid pulp or derivatives thereof and said particulates comprise a gold coating. ### Claim 20 (depends on 1) The method according to claim 1 wherein said particulates in said sheet article comprise hydrophobic zeolites. ### Claim 21 (depends on 1) The method according to claim 1 wherein said polymer pulp of said article consists essentially of a blend of polyacrylonitrile with polyaramid pulp or polyolefin pulp. ### Claim 22 A method of separating an analyte from a fluid comprising the step of: passing a fluid comprising an analyte through a sheet article comprising at least one polymer pulp and at least one of sorptive and reactive particles enmeshed therein, said polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or polyacrylonitrile pulp or fibrillated polytetrafluoroethylene, or 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said pulp having fibers of length in the range of 0.8 to about 4.0 mm, said particulates having an average size in the range of 0.1 to 100 micrometers, said sheet being prepared by a wet-laid process, said sheet article being capable of isolating said analyte from said fluid or chemically reacting with said analyte. ### Claim 23 (depends on 22) The method according to claim 22 wherein said analyte is selected from the group consisting of a pesticide, dye, oil, grease, phenolic compound, and a polynuclear aromatic compound. ### Claim 24 (depends on 22) The method according to claim 22 wherein said fluid comprises a radioactive metal ion and said solid phase particulates are capable of isolating said metal ion from said fluid. ### Claim 25 A method comprising the step of passing a fluid containing an analyte through a solid phase extraction or reaction sheet article comprising a mixture of glass fibers and a least one sorptive polymer pulp which is substantially nonswellable and at least one of sorptive and reactive particulates enmeshed therein, said at least one sorptive polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or acrylonitrile pulp or fibrillated polytetrafluoroethylene, and 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said sheet being prepared by a wet-laid process, wherein in said method said analyte becomes sorbed or reacted and becomes bound to at least one of said polymer pulp and said particulates in said sheet article.