US 12,187,649 B2
Method and apparatus for producing carbon foam boards
David Klein, Hennef (DE); and Michael Gerads, Bonn (DE)
Assigned to Nippon Kornmeyer Carbon Group GmbH, Windhagen (DE)
Filed by Nippon Kornmeyer Carbon Group GmbH, Windhagen (DE)
Filed on Jan. 24, 2024, as Appl. No. 18/421,115.
Claims priority of application No. PCT/EP2023/051907 (WO), filed on Jan. 26, 2023.
Prior Publication US 2024/0254053 A1, Aug. 1, 2024
Int. Cl. C01B 32/21 (2017.01); C04B 35/52 (2006.01); C04B 111/00 (2006.01)
CPC C04B 35/522 (2013.01) [C01B 32/21 (2017.08); C01B 2204/24 (2013.01); C04B 2111/00224 (2013.01); C04B 2235/614 (2013.01); C04B 2235/6581 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for producing carbon foam boards, comprising:
sprinkling a dry layer of foamable starch powder onto a temperature-resistant substrate board to form a starch-powder-coated substrate board;
introducing the starch-powder-coated substrate board into a furnace;
introducing argon or nitrogen into the furnace to displace air or pumping out air from the furnace until an internal pressure of 720 to 1000 mbar has been established;
heating the furnace to a foaming temperature between 180° C. and 450° C. and thereby foaming the starch powder on the starch-powder-coated substrate board; and
maintaining the foaming temperature over a prolonged duration between 1 and 10 hours to stabilize the foamed starch into a foam board.