Patent ID: 11857956
Assignee: SYNGARS TECHNOLOGY CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
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.