# US 2023/0058075 A1 · Molded adsorbent and water purification cartridge

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- Number: US 2023/0058075 A1
- Document ID: US20230058075A1
- Status: Published application
- Kind: A1
- Application number: 17/797,159
- Filed: 2021-01-07
- Published: 2023-02-23
- Earliest claimed: 2020-02-05
- Assignees: LIXIL Corporation
- Applicants: LIXIL Corporation
- Inventors: Keiichi HIRATA; Naoya TAMURA; Kazuichi OHASHI; Kazuhiro SATO
- Web page: https://patentgrep.com/patent/US20230058075A1

## CPC

- B01J 20/20: comprising free carbon; comprising carbon obtained by carbonising processes
- B01J 20/165: {Natural alumino-silicates, e.g. zeolites}
- B01J 20/28004: {Sorbent size or size distribution, e.g. particle size}
- B01J 20/2803: {Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products}
- C01B 5/00: Water
- C01B 32/354: After-treatment
- C01B 39/00: Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination (treatment to modify the sorption properties, e.g. shaping using a binder, B01J20/10; treatment to modify the catalytic properties, e.g. combination of treatments to make the zeolites appropriate to their use as a catalyst, B01J29/04; treatment to improve the ion-exchange properties B01J39/14)
- C02F 1/28: by sorption (using ion-exchange C02F1/42; sorbent compositions B01J)
- B01J 2220/62: In a cartridge
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

To improve a performance for removing soluble lead and finely particulate lead. A molded adsorbent (1) includes an adsorption material (3) and a fibrous binder (5). The adsorption material (3) contains activated carbon (3A) and zeolite (3B). A central particle size D50 of the activated carbon (3A) is 27 μm or more and 35 μm or less, a central particle size D50 of the zeolite (3B) is 24 μm or more and 31 μm or less, and a content rate of the zeolite (3B) is 10 mass % or more and 70.5 mass % or less.

## Claims

### Claim 1

A molded adsorbent comprising an adsorption material and a fibrous binder,
wherein the adsorption material contains activated carbon and zeolite,
wherein a central particle size D50 of the activated carbon is 27 μm or more and 35 μm or less,
wherein a central particle size D50 of the zeolite is 24 μm or more and 31 μm or less, and
wherein a content rate of the zeolite is 10 mass % or more and 70.5 mass % or less.

### Claim 2 (depends on 1)

The molded adsorbent of claim 1,
wherein a central particle size D50 of the adsorption material is 21 μm or more and 43 μm or less, and
wherein a content rate of the adsorption material having a particle size of 10 μm or less is 1.7 vol % or more and 13.7 vol % or less.

### Claim 3 (depends on 1)

The molded adsorbent of claim 1,
wherein a content rate of the activated carbon is 23.5 mass % or more and 84 mass % or less, and
wherein a content rate of the fibrous binder is 2 mass % or more and 10 mass % or less.

### Claim 4 (depends on 1)

The molded adsorbent of claim 1, wherein a pressure loss is 0.07 MPa or more and 0.15 MPa or less.

### Claim 5 (depends on 1)

A water purification cartridge comprising the molded adsorbent of claim 1.