US 12,296,317 B2
Silicon-based solid amine sorbent for CO2 and making method thereof
Zuotai Zhang, Shenzhen (CN); Chunyan Li, Shenzhen (CN); Feng Yan, Shenzhen (CN); Xuehua Shen, Shenzhen (CN); and Fan Qu, Shenzhen (CN)
Assigned to DeCarbon Technology (Shenzhen) Co., Ltd., Shenzhen (CN)
Appl. No. 17/620,286
Filed by DeCarbon Technology (Shenzhen) Co., Ltd., Shenzhen (CN)
PCT Filed Jun. 9, 2021, PCT No. PCT/CN2021/099178
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2022/257045, PCT Pub. Date Dec. 15, 2022.
Prior Publication US 2024/0123423 A1, Apr. 18, 2024
Int. Cl. B01J 20/22 (2006.01); B01D 3/36 (2006.01); B01D 53/02 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/32 (2006.01)
CPC B01J 20/22 (2013.01) [B01D 3/36 (2013.01); B01D 53/02 (2013.01); B01J 20/28061 (2013.01); B01J 20/28064 (2013.01); B01J 20/28076 (2013.01); B01J 20/3078 (2013.01); B01J 20/3204 (2013.01); B01J 20/3244 (2013.01); B01J 20/3248 (2013.01); B01D 2253/20 (2013.01); B01D 2257/504 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A making method of a silicon-based solid amine sorbent for CO2, comprising:
providing a silicon source liquid which is a silicate solution or a liquid organosilicate, wherein the silicate solution comprises water and a first silicate dissolved in the water;
mixing the silicon source liquid with a precipitant to perform a precipitation reaction to obtain a product liquid containing a precipitate, wherein the precipitate is a second silicate or silicic acid;
filtering out the precipitate and washing the precipitate with water;
mixing the precipitate filtrated out but not dried yet with an organic alcohol and then performing an azeotropic distillation to obtain a dehydrated precipitate;
calcining the dehydrated precipitate to obtain a silicon-based support, wherein the silicon-based support is a powder of the second silicate powder or a silica powder; and
impregnating the silicon-based support with an organic amine solution and then drying the silicon-based support impregnated with the organic amine solution to obtain the silicon-based solid amine sorbent for CO2.