# US 2021/0276001 A1 · Method for manufacturing catalyst and catalyst

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0276001 A1
- Document ID: US20210276001A1
- Status: Published application
- Kind: A1
- Application number: 17/174,741
- Filed: 2021-02-12
- Published: 2021-09-09
- Earliest claimed: 2020-03-09
- Assignees: Subaru Corporation
- Applicants: Subaru Corporation
- Inventors: Ryo NAGAI
- Web page: https://patentgrep.com/patent/US20210276001A1

## CPC

- B01J 37/0228: {in several steps}
- B01J 37/0219: {the coating containing organic compounds}
- B01J 37/0221: {of particles}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- F01N 3/2803: {characterised by structure, by material or by manufacturing of catalyst support}
- B01D 53/945: {characterised by a specific catalyst}
- B01D 2258/014: Stoichiometric gasoline engines
- F01N 3/101: {Three-way catalysts}
- F01N 2510/06: for exhaust purification, e.g. catalytic reaction
- F01N 2570/14: Nitrogen oxides
- Y02T 10/12: Improving ICE efficiencies
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- 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)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for manufacturing a catalyst includes depositing a catalyst slurry containing at least a catalyst metal and water on a support, depositing particles of a water-absorbing polymer on a surface of the catalyst slurry, expanding the particles to a predetermined size with the water present in the catalyst slurry, and firing the support having the catalyst slurry and the particles deposited on the catalyst slurry.

## Claims

### Claim 1

A method for manufacturing a catalyst, the method comprising:
depositing a catalyst slurry comprising at least a catalyst metal and water on a support;
depositing particles of a water-absorbing polymer on a surface of the catalyst slurry;
expanding the particles to a predetermined size with the water present in the catalyst slurry; and
firing the support having the catalyst slurry and the particles deposited thereon.

### Claim 2 (depends on 1)

The method for manufacturing a catalyst according to claim 1, wherein
the support has a plurality of cells defined by partition walls,
the depositing the catalyst slurry on the support comprises supplying the catalyst slurry to at least one of the cells of the support,
the depositing the particles on the surface of the catalyst slurry comprises filling, with the particles, the cell supplied with the catalyst slurry, and
the expanding the particles comprises expanding the particles to the predetermined size with the water present in the catalyst slurry to press the catalyst slurry with the expanded particles.

### Claim 3 (depends on 1)

The method for manufacturing a catalyst according to claim 1, wherein
the support has a plurality of cells defined by partition walls,
the depositing the catalyst slurry on the support comprises supplying the catalyst slurry to at least one of the cells of the support,
the depositing the particles on the surface of the catalyst slurry comprises supplying the particles to the cell supplied with the catalyst slurry such that the particles are not in contact with each other, and
the expanding the particles comprises allowing the particles to absorb the water present in the catalyst slurry.

### Claim 4 (depends on 1)

A catalyst manufactured by the method according to claim 1.

### Claim 5 (depends on 2)

A catalyst manufactured by the method according to claim 2.

### Claim 6 (depends on 3)

A catalyst manufactured by the method according to claim 3.