# US 11,439,978 B2 · Method for manufacturing a solid adsorbent fiber

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- Number: US 11,439,978 B2
- Document ID: US11439978B2
- Status: Granted
- Kind: B2
- Application number: 16/231,220
- Filed: 2018-12-21
- Published: 2019-07-04
- Granted: 2022-09-13
- Earliest claimed: 2017-12-31
- Assignees: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
- Applicants: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
- Inventors: Philippe A. Coignet; Dean W. Kratzer
- Web page: https://patentgrep.com/patent/US11439978B2

## CPC

- B01J 20/3064: {Addition of pore forming agents, e.g. pore inducing or porogenic agents}
- B01D 39/02: Loose filtering material, e.g. loose fibres
- B01D 53/02: by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)}
- B01J 20/18: Synthetic zeolitic molecular sieves
- B01J 20/28023: {Fibres or filaments (fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence)}
- B01J 20/28028: {Particles immobilised within fibres or filaments}
- H01B 1/02: mainly consisting of metals or alloys
- H05K 9/00: Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00)
- B01D 2239/0407: comprising particulate additives, e.g. adsorbents
- B01D 2239/0492: on fibres
- B01D 2253/108: Zeolites
- B01D 2256/16: Hydrogen
- B01D 2257/80: Water
- B01D 2259/4508: for cleaning air in buildings
- B01J 8/00: Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- 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)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A solid adsorbent fiber includes a solid support fiber that is enveloped by a solidified polymeric binder and also adsorbent particles.

## Claims

### Claim 1

A method of manufacturing supported solid adsorbent fibers, comprising the steps of:
drawing a solid support fiber or multi-filament solid support fiber from a freely rotating spool or mechanically rotated spool;
dip-coating a solid fiber support with a polymeric dope by plunging the solid support fiber or multi-filament solid support fiber into a coating bath, thereby providing a polymeric dope-coated solid fiber support, the coating bath containing the polymeric dope, the polymeric dope comprising adsorbent particles and a polymeric binder dissolved in a solvent; and
spraying the dip-coated solid fiber support with a coagulant liquid bar traversing the polymeric dope-coated solid fiber support through a sprayer such that the dissolved polymeric binder coated on the solid fiber support as part of the polymeric dope is solidified, thereby producing said solid adsorbent fibers.

### Claim 2 (depends on 1)

The method of claim 1, further comprising the step of blowing gas across the dip-coated solid fiber support upstream of said spraying step so as to drive off any of the coagulant liquid that may have flowed downwardly along the dip-coated fiber toward said dip-coating step.

### Claim 3 (depends on 1)

The method of claim 1, further comprising the step of degassing the polymeric dope prior to said dip-coating step.

### Claim 4 (depends on 1)

The method of claim 1, further comprising the step of extracting amounts of solvent that may remain in the solid adsorbent fibers.

### Claim 5 (depends on 1)

The method of claim 1, further comprising the step of coating the solid fiber support with a functional layer, wherein said functional layer is a selective layer or a protective layer.

### Claim 6 (depends on 1)

The method of claim 1, wherein the particulate adsorbent is a zeolite that undergoes ionic exchange while in the polymeric dope.

### Claim 7 (depends on 1)

The method of claim 1, further comprising the step of heating the solid adsorbent fiber to a temperature at or above an activation temperature of the adsorbent particles.

### Claim 8 (depends on 7)

The method of claim 7, further comprising the step of exposing the solid adsorbent fiber to a cross-linking agent prior to said heating step.

### Claim 9 (depends on 7)

The method of claim 7, wherein the polymeric binder comprises a polymer having a glass transition temperature that is above said activation temperature.

### Claim 10 (depends on 7)

The method of claim 7, wherein the polymeric binder comprises a polymer having a glass transition temperature that is at or below said activation temperature.

### Claim 11 (depends on 7)

The method of claim 7, wherein the adsorbent particles are subjected to ion exchange prior to said heating step.

### Claim 12 (depends on 1)

The method of claim 1, further comprising the step of coating the solid fiber support with an adhesion promoter layer prior to said dip-coating.

### Claim 13 (depends on 12)

The method of claim 12, wherein the solid fiber support is comprised of a metallic material and the adhesion promoter layer is a polymeric material.

### Claim 14 (depends on 1)

The method of claim 1, wherein the solid fiber support is comprised of a metallic material and said solid fiber support has been functionalized by chemical exposure to pickle the surface of the solid fiber support.

### Claim 15 (depends on 1)

The method of claim 1, wherein the solid fiber support is comprised of a polymeric material and an outer surface of said solid fiber support has been functionalized by application of plasma energy.