JPWO2020169809A5

JPWO2020169809A5 -

Info

Publication number: JPWO2020169809A5
Application number: JP2021549266A
Authority: JP
Publication date: 2022-08-22

Claims

A method for producing a particulate carbon material with reduced odor, comprising:
a first process step in which a particulate carbon material obtained by precipitation of a starting material dissolved wholly or partially in a liquid is provided;
the particulate carbon material is subsequently treated in a second process step by heating in a gas atmosphere, thereby obtaining an odor reducing particulate carbon material;
in the second process step, the process temperature does not exceed a maximum temperature of 300°C and a minimum temperature of no less than 150°C;
The gas atmosphere in the second process step is
a) air enriched with inert gas with an oxygen content of less than 15% by volume, and/or
b) decompressed air at a pressure of less than 500 mbar;
A method selected from.

2. A process according to claim 1, wherein the oxygen content of the gas atmosphere consisting of air enriched with inert gas is at least 0.1% by volume.

3. Process according to claim 1 or 2, wherein in the first process step the starting material contains 50% or more lignin and precipitation of the starting material occurs by introducing acid gas and/or adding acid.

Process according to any one of claims 1 to 3 , wherein in the first process step the starting material contains 50% or more lignin and the stabilization of the starting material is carried out under hydrothermal carbonization conditions.

The method of any one of claims 1-4 , wherein the particulate carbon material has a BET surface area of at least 5 m ² /g to 200 m ² / g after the first process step.

The method according to any one of claims 1 to 5, wherein the process temperature of the particulate carbon material under the gas atmosphere is maintained for 1 second or more and 60 minutes or more during the second process step.

A method according to any one of the preceding claims, wherein in the second process step the particulate carbon material is treated at a process temperature under a gas atmosphere and further heated and cooled under said gas atmosphere .

Process according to any one of the preceding claims, wherein said second process step is carried out in a rotary kiln or in a fluidized bed .

A method according to any one of the preceding claims, wherein said second process step is performed in combination with grinding or classifying .

A method according to any one of the preceding claims, wherein in said first process step the particulate carbon material is obtained from a starting material containing more than 50% sugars, starches or lignin.

The inert gas is nitrogen, carbon dioxide, superheated steam and gases released during said second process step, and/or air enriched with inert gas and having an oxygen concentration of less than 10% by volume. A method according to any one of claims 1 to 10, selected from the group consisting of:

A particulate carbon material with reduced odor obtained by the method according to any one of claims 1-11.

Particulate carbon with reduced odor according to claim 12 or obtained by the process according to any one of claims 1 to 11, wherein the content of dimethyl sulfide and guaiacol is less than 1 mg/kg material.

A particulate carbon material with reduced odor according to claim 12 or 13 or obtained by the method according to any one of claims 1 to 11, wherein the naphthalene content is less than 5 mg/kg.

12-14 or any one of claims 1-11, wherein the content of 18EPA-PAK excluding BG (according to DIN EN 16181:2017-11/draft) is less than 5 mg/kg 2. A particulate carbon material with reduced odor, obtained by the method according to claim 1.

benzo(a)anthracene, chrysene, benzo(b)fluoroantene, benzo(k)fluoroantene, benzo(a)pyrene, indenol(1,2,3-cd)pyrene, dibenzol(a,h)anthracene, benzene ( 16. or according to any one of claims 12 to 15 , wherein the content of g,h,i) perylenes, benzo(e)pyrenes and benzo(j)fluoroantenes is less than 0.1 mg/kg. A particulate carbon material with reduced odor, obtained by the method according to any one of 1 to 11.

Particulate carbon material with reduced odor according to any one of claims 12 to 16 or obtained by the process according to any one of claims 1 to 11 in polymer blends, especially elastomer blends. as an additive for

A polymer blend comprising a reduced odor particulate carbon material as defined in any one of claims 12-16.

19. The polymer blend of claim 18, wherein said polymer blend is an elastomer blend.

a) a BET surface area of at least 5m ^２2 / g,
b) a dimethyl sulfide and guaiacol content of less than 1 mg/kg;
c) a BET surface area that deviates up to 20% from the STSA surface area;
d) has a carbon content of 50 to 80% by weight, based on ash-free dry matter;
e) benzo(a)anthracene, chrysene, benzo(b)fluoroantene, benzo(k)fluoroantene, benzo(a)pyrene, indenol(1,2,3-cd)pyrene, dibenzol(a,h)anthracene, the content of benzene (g,h,i) perylene, benzo (e) pyrene and benzo (j) fluoroantene is less than 0.1 mg/kg;
A particulate carbon material with reduced odor produced from renewable raw material-based starting materials.

21. A polymer blend comprising the reduced odor particulate carbon material of claim 20.