# US 8,568,880 B2 · Process for producing spherical particles of furfuryl alcohol resin, spherical particles of furfuryl alcohol resin produced thereby, and spherical carbon particles and spherical activated carbon particles obtained using the same

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

- Number: US 8,568,880 B2
- Document ID: US8568880B2
- Status: Granted
- Kind: B2
- Application number: 13/472,851
- Filed: 2012-05-16
- Published: 2012-09-06
- Granted: 2013-10-29
- Earliest claimed: 2010-02-01
- Assignees: Asahi Organic Chemicals Industry Co., Ltd.
- Applicants: Yasuhiro Matsumoto
- Inventors: Yasuhiro Matsumoto
- Web page: https://patentgrep.com/patent/US8568880B2

## CPC

- C08J 3/12: Powdering or granulating
- C08G 61/125: {with a five-membered ring containing one oxygen atom in the ring}
- C08G 65/36: Furfuryl alcohol
- C08L 71/14: Furfuryl alcohol polymers
- C08G 2261/3222: containing one or more oxygen atoms as the only heteroatom, e.g. furan
- C08G 2261/70: Post-treatment
- C08J 2365/00: Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08J2307/00 - C08J2357/00, C08J2361/00 take precedence); Derivatives of such polymers
- Y10T 428/2982: Particulate matter [e.g., sphere, flake, etc.]
- Y10T 428/2991: Coated
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided is a process for advantageously producing spherical particles of furfuryl alcohol resin without irradiating the reaction system with ultrasonic waves and without using a harmful aldehyde as a starting material. In the process, furfuryl alcohol is subjected to resinification and curing to form spherical fine particles of furfuryl alcohol resin. More specifically, the furfuryl alcohol is subjected to a self-condensation with an acid catalyst having a pKa of less than 1.5 in the presence of a protective colloid and then heated for curing to form spherical particles of furfuryl alcohol resin.

## Claims

### Claim 1

A process for producing spherical particles of furfuryl alcohol resin comprising the steps of:
resinifying furfuryl alcohol in an aqueous reaction medium through a self-condensation reaction with an acid catalyst having a pKa of less than 1.5 in the presence of a protective colloid to form spherical particles of a resinified product of the furfuryl alcohol; and
heating the spherical particles of the resinified product of the furfuryl alcohol for curing.

### Claim 2 (depends on 1)

The process for producing spherical particles of furfuryl alcohol resin according to claim 1, wherein the acid catalyst is alkylbenzenesulfonic acid.

### Claim 3 (depends on 1)

The process for producing spherical particles of furfuryl alcohol resin according to claim 1, wherein the acid catalyst is alkylbenzenesulfonic acid having a carbon number of 10 or more.

### Claim 4 (depends on 1)

The process for producing spherical particles of furfuryl alcohol resin according to claim 1, wherein the spherical furfuryl alcohol resin particles have an average particular diameter of 0.01 μm to 1000 μm.

### Claim 5 (depends on 1)

The process for producing spherical particles of furfuryl alcohol resin according to claim 1, wherein 0.5 to 25 times by mass of water with respect to the amount of the furfuryl alcohol is used as a reaction medium.

### Claim 6 (depends on 1)

The process for producing spherical particles of furfuryl alcohol resin according to claim 1, wherein the protective colloid is a gum arabic.

### Claim 7 (depends on 1)

A spherical furfuryl alcohol resin particle obtained by the process according to claim 1.

### Claim 8

A spherical furfuryl alcohol resin particle comprising a spherical resin particle obtained through a self-condensation reaction of furfuryl alcohol, wherein the spherical furfuryl alcohol resin particle has an average particle diameter of 0.01 μm to 1000 μm.

### Claim 9 (depends on 7)

A spherical carbon particle obtained by firing the resin particles according to claim 7.

### Claim 10 (depends on 8)

A spherical carbon particle obtained by firing the resin particles according to claim 8.

### Claim 11 (depends on 9)

A spherical activated carbon particle obtained by activating the spherical carbon particle according to claim 9.

### Claim 12 (depends on 10)

A spherical activated carbon particle obtained by activating the spherical carbon particle according to claim 10.