# US 9,751,764 B2 · Carbon material production method and carbon material

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- Number: US 9,751,764 B2
- Document ID: US9751764B2
- Status: Granted
- Kind: B2
- Application number: 14/913,914
- Filed: 2014-09-09
- Published: 2016-07-14
- Granted: 2017-09-05
- Earliest claimed: 2013-09-11
- Assignees: Kobe Steel, Ltd.
- Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Inventors: Maki Hamaguchi; Shohei Wada
- Web page: https://patentgrep.com/patent/US9751764B2

## CPC

- C01B 32/26: Preparation (by using ultra-high pressure B01J3/06; by crystal growth C30B29/04)
- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

A method for producing a carbon material including an oxidation step of oxidizing an ashless coal, a forming step of mixing an oxidized ashless coal obtained in the oxidation step and an unoxidized ashless coal and forming a mixture thereof, and a carbonization step of carbonizing a formed body obtained in the formation step. Percentage of increase in oxygen of the oxidized ashless coal obtained in the oxidation step is from 2.0 to 10.0%. A mixing ratio of the oxidized ashless coal in the forming step is from 60 to 95 parts by mass per 100 parts by mass of a total of the oxidized ashless coal and the unoxidized ashless coal.

## Claims

### Claim 1

A method for producing a carbon material, the method comprising
oxidizing an ashless coal to obtain an oxidized ashless coal;
mixing the oxidized ashless coal and an unoxidized ashless coal and forming a mixture thereof, to obtain a formed body; and
carbonizing the formed body to obtain a carbon material,
wherein:
a percentage of increase in oxygen of the oxidized ashless coal obtained in the oxidizing step is from 2.0 to 10.0%; and
the oxidized ashless coal is mixed with the unoxidized ashless coal in an amount of from 60 to 95 parts by mass per 100 parts by mass of a total of the oxidized ashless coal and the unoxidized ashless coal.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the oxidation is an air oxidation.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the oxidation is performed at a temperature of 150° C. or more and less than an ignition point of the ashless coal.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the oxidation is performed at a temperature of 150° C. or more and less than an ignition point of the ashless coal.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the oxidized ashless coal is mixed with the unoxidized ashless coal in an amount of from 80 to 90 parts by mass per 100 parts by mass of a total of the oxidized ashless coal and the unoxidized ashless coal.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the percentage of increase in oxygen of the oxidized ashless coal obtained in the oxidizing step is from 4.0 to 9.0%.

### Claim 7 (depends on 1)

The method according to claim 1, percentage of increase in oxygen of the oxidized ashless coal obtained in the oxidizing step is from 6.0 to 8.5%.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the oxidizing is conducted at a temperature of from 150° C. to 350° C.