US 11,857,956 B1
Solid acid catalyst for preparing D-galactose and preparation method thereof
Zhi Chen, Jinhua (CN); Qiang Huang, Jinhua (CN); Honghui Chen, Jinhua (CN); Xuming Shi, Jinhua (CN); Weimin Ni, Jinhua (CN); and Xiangrong Hu, Jinhua (CN)
Assigned to SYNGARS TECHNOLOGY CO., LTD., Jinhua (CN)
Filed by Syngars Technology Co., Ltd., Jinhua (CN)
Filed on Jan. 17, 2023, as Appl. No. 18/097,634.
Claims priority of application No. 202210897692.9 (CN), filed on Jul. 28, 2022.
Int. Cl. B01J 37/10 (2006.01); B01J 37/00 (2006.01); B01J 35/02 (2006.01); B01J 27/02 (2006.01); B01J 21/04 (2006.01); B01J 21/06 (2006.01)
CPC B01J 37/10 (2013.01) [B01J 21/04 (2013.01); B01J 21/066 (2013.01); B01J 27/02 (2013.01); B01J 35/02 (2013.01); B01J 37/0018 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A preparation method of a solid acid catalyst for preparing D-galactose, comprising the following steps:
S1. synthesis of a skeleton carrier
S11. preparation of a sodium aluminate solution and an organic template solution
dissolving sodium aluminate and sodium hydroxide in water to obtain the sodium aluminate solution; and
dissolving a compound as an organic template and concentrated sulfuric acid in water to obtain the organic template solution;
S12. mixing the sodium aluminate solution with the organic template solution, and thoroughly shaking a resulting mixture to obtain a mixed solution,
wherein the organic template is tetrapropylammonium bromide (TPAB) and
a mass ratio of the sodium aluminate to the organic template is 1:9;
S13. adding a zirconium source to the mixed solution obtained in S12, and thoroughly mixing, wherein a molar ratio of zirconium to aluminum is (85-115):150;
S14. subjecting a reaction system obtained in S13 to a hydrothermal reaction at 105° C. to 130° C. for 10 h to obtain a mixed crystal ZrO2/Al2O3; and
S15. heating the mixed crystal ZrO2/Al2O3 obtained in S14 until the organic template is completely ashed, and washing a resulting product with absolute ethanol to obtain a white solid ZrO2/Al2O3,
wherein the organic template is ashed at 500° C. for 30 min; and
S2. soaking the skeleton carrier obtained in S1 in concentrated sulfuric acid such that sulfonyl is loaded on the skeleton carrier to obtain the solid acid catalyst.