US 12,338,153 B2
Method for producing mixed raw material, method for producing molten glass, method for producing glass article, apparatus for producing molten glass, and apparatus for producing glass article
Terutaka Maehara, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Apr. 18, 2022, as Appl. No. 17/659,556.
Application 17/659,556 is a continuation of application No. PCT/JP2020/039382, filed on Oct. 20, 2020.
Claims priority of application No. 2019-193025 (JP), filed on Oct. 23, 2019.
Prior Publication US 2022/0242770 A1, Aug. 4, 2022
Int. Cl. C03B 1/02 (2006.01); B01D 53/62 (2006.01); B01D 53/78 (2006.01); C03B 5/235 (2006.01); C03B 25/04 (2006.01)
CPC C03B 1/02 (2013.01) [B01D 53/62 (2013.01); B01D 53/78 (2013.01); C03B 5/235 (2013.01); C03B 25/04 (2013.01); B01D 2251/304 (2013.01); B01D 2251/604 (2013.01); B01D 2257/504 (2013.01); B01D 2258/0241 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of producing a mixed raw material, comprising:
preparing a glass raw material and an aqueous solution of sodium hydroxide;
exposing the aqueous solution to carbon dioxide gas, such that the carbon dioxide gas is absorbed in the aqueous solution and sodium hydrogen carbonate is deposited in the aqueous solution;
mixing the sodium hydrogen carbonate with the glass raw material such that a mixed raw material comprising the sodium hydrogen carbonate and the glass raw material is obtained; and
heating the mixed raw material before charging the mixed raw material into a melting furnace such that the sodium hydrogen carbonate is converted to sodium carbonate and the carbon dioxide gas is released,
wherein at least a portion of the carbon dioxide gas released in the heating of the mixed raw material is absorbed in the aqueous solution.