US 12,258,281 B2
Strontium aluminate mixed oxide and method for producing same
Thomas Harmening, Munster (DE); and Marcos Schoneborn, Hamburg (DE)
Appl. No. 17/620,534
Filed by Sasol Germany GmbH, Hamburg (DE)
PCT Filed Jul. 10, 2020, PCT No. PCT/EP2020/069669
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2021/005241, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 19185570 (EP), filed on Jul. 10, 2019.
Prior Publication US 2022/0356069 A1, Nov. 10, 2022
Int. Cl. C01F 7/166 (2022.01); C09K 11/77 (2006.01)
CPC C01F 7/166 (2013.01) [C09K 11/7734 (2013.01); C01P 2002/52 (2013.01); C01P 2002/60 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of preparing a strontium aluminate mixed oxide precursor, the method comprising:
a) according to a first method:
i) providing a boehmite suspension, wherein the boehmite in the boehmite suspension has a crystallite size (021 and/or 020 reflex) of between 3 nm and 50 nm;
ii) hydrothermally treating the suspension to obtain a hydrothermally treated boehmite suspension;
iii) adding a strontium compound to the hydrothermally treated boehmite suspension to form a strontium alumina suspension (Sr—Al suspension); and
iv) drying the Sr—Al suspension to produce the strontium aluminate mixed oxide precursor; or
b) according to a second method:
i) providing a boehmite suspension, wherein the boehmite in the boehmite suspension has a crystallite size (021 and/or 020 reflex) of between 3 nm and 50 nm;
ii) adding a strontium compound to the boehmite suspension to form a strontium alumina suspension (Sr—Al suspension);
iii) hydrothermally treating the Sr—Al suspension to obtain a hydrothermally treated Sr—Al suspension; and
iv) drying the hydrothermally treated Sr—Al suspension to produce the strontium aluminate mixed oxide precursor; or
c) according to a third method:
i) providing a boehmite suspension, wherein the boehmite in the boehmite suspension has a crystallite size (021 and/or 020 reflex) of between 3 nm and 50 nm;
ii) hydrothermally treating the suspension to obtain a hydrothermally treated boehmite suspension;
iii) adding a strontium compound to the hydrothermally treated boehmite suspension to form a strontium alumina suspension (Sr—Al suspension);
iv) hydrothermally treating the Sr—Al suspension to obtain a hydrothermally treated Sr—Al suspension; and
v) drying the hydrothermally treated Sr—Al suspension to produce the strontium aluminate mixed oxide precursor.