JP-2025520131-A5 -

Dates

Publication Date

20260508

Application Date

20230601

Description

Preferred embodiments of the present invention have been shown and described herein, but it will be apparent to those skilled in the art that such embodiments are provided merely as examples. The present invention is not intended to be limited by the specific examples provided herein. While the present invention has been described with reference to the preceding specification, the descriptions and illustrations of embodiments herein are not intended to be constrained. Those skilled in the art will be able to conceive of numerous variations, alterations, and substitutions without departing from the present invention. Furthermore, it should be understood that all aspects of the present invention are not limited to the specific descriptions, configurations, or relative proportions described herein, which vary depending on various conditions and variables. It should be understood that various alternatives to the embodiments of the present invention described herein may be used in the practice of the present invention. Therefore, the present invention is intended to encompass all such alternatives, modifications, alterations, or equivalents. The following claims define the scope of the present invention, and methods and structures within the scope of these claims, as well as their equivalents, are intended to be protected thereby. The present invention provides, for example, the following items: (Item 1) A method for producing carbon particles, (a) In a reactor, a non-hydrogen gas is brought into contact with a hydrocarbon raw material in the presence of plasma, thereby obtaining an exhaust gas containing (i) carbon particles and (ii) hydrogen and the non-hydrogen gas, (b) Separating at least a portion of the hydrogen from the non-hydrogen gas of the exhaust gas to obtain a separated gas containing the non-hydrogen gas, (c) Providing the separation gas or a derivative thereof containing the non-hydrogen gas to the reactor, (d) A method comprising contacting the separation gas or a derivative thereof containing the non-hydrogen gas with a further hydrocarbon feedstock in the presence of the plasma to obtain (iii) further carbon particles and (iv) further exhaust gas containing hydrogen and the non-hydrogen gas. (Item 2) The method according to item 1, wherein the non-hydrogen gas comprises one or more gases selected from the group consisting of nitrogen, helium, neon, krypton, argon, carbon monoxide, and carbon dioxide. (Item 3) The method according to item 1, wherein the separation gas or its derivative contains about 50 mol% or less of hydrogen. (Item 4) The method according to item 3, wherein the separated gas or its derivative contains about 25 mol% or less of hydrogen. (Item 5) The method according to item 4, wherein the separated gas or its derivative contains about 10 mol% or less of hydrogen. (Item 6) The method according to item 1, further comprising providing the non-hydrogen gas and the hydrogen-containing gas mixture to the reactor in (a). (Item 7) The method according to item 6, wherein the gas mixture contains an average molecular weight of about 1 kg/kmol to 90 kg/kmol. (Item 8) The method according to item 6, wherein in (a), the ratio of the non-hydrogen gas to the hydrogen is at least 2 to 1. (Item 9) The method according to item 8, wherein the ratio is at least 10 to 1. (Item 10) The method according to item 1, further comprising providing the gas mixture containing the separation gas or a derivative thereof and hydrogen to the reactor in (c). (Item 11) The method according to item 10, wherein in (d), the ratio of the non-hydrogen gas to the hydrogen is at least 2 to 1. (Item 12) The method according to item 11, wherein the ratio is at least 10 to 1. (Item 13) (c) The method according to item 1, wherein hydrogen is not supplied to the reactor during or after the reactor. (Item 14) The method according to item 1, wherein the carbon particles or the further carbon particles are carbon black. (Item 15) The method according to item 1, further comprising bringing the non-hydrogen gas and the hydrocarbon raw material into contact at a temperature of approximately 1900°C or less in (a). (Item 16) The method according to item 15, wherein the temperature is approximately 1800°C or lower. (Item 17) The method according to item 1, further comprising bringing the separated gas and the further hydrocarbon raw materials into contact at a temperature of about 1900°C or less in (d). (Item 18) The method according to item 17, wherein the temperature is approximately 1800°C or lower. (Item 19) The method according to item 1, wherein the carbon particles or further carbon particles have a specific surface area of at least about 40 square meters (m²/g) per gram. (Item 20) The method according to item 1, wherein the carbon particles or the further carbon particles have a specific surface area of about 40 m² /g to 200 m² /g. (Item 21) The method according to item 1, wherein the carbon particles or the further carbon