ALUMINA CATALYST PREPARATION METHOD, ALUMINA CATALYST PREPARED THEREBY, AND PROPYLENE PREPARATION METHOD USING SAME

WIPO Patent Application WO/2021/256628

A1

The present invention relates to an alumina catalyst preparation method, an alumina catalyst prepared thereby, and a propylene preparation method using same, and, more specifically, to an alumina catalyst preparation method, an alumina catalyst prepared thereby, and a propylene preparation method using same, the alumina catalyst preparation method comprising the steps of: (S1) primarily calcining an alumina precursor so as to form a mixed phase alumina comprising 1-15 wt% of α-alumina, 60-95 wt% of θ-alumina and 4-25 wt% of δ-alumina; (S2) steam-treating, with water vapor, the mixed phase alumina at a temperature lower than the primary calcination temperature, and activating same; and (S3) secondarily calcining same at a temperature higher than the steam-treatment temperature and lower than the primary calcination temperature after the steam-treatment step.

KEUM YOUNG SUB (KR)
CHOI DAE HEUNG (KR)
CHEON JOO YOUNG (KR)
KIM HYEON BIN (KR)

PCT/KR2020/016120

December 23, 2021

November 17, 2020

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LG CHEMICAL LTD (KR)

B01J21/04; B01J37/08; C07C5/48; C07C11/06

KR101527845B1	2015-06-16
KR20040065270A	2004-07-21
US5475183A	1995-12-12
KR970009880A	1997-03-27
KR20190093379A	2019-08-09

"Structure, Surface Area and Morphology of Aluminas from thermal decomposition of Al(OH) (CH COO) Crystals", AN. ACAD. BRAS. CIENC., vol. 72, 2000, pages 471 - 495
"Specific surface area and structures of aluminas from fibrillar pseudoboehmite", REVISTA MATERIA, vol. 13, no. 2, 2008, pages 329 - 341
See also references of EP 3944892A4

NEWKOREA PATENT & LAW FIRM (KR)

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