US 12,662,387 B2
Precipitated silicic acids, process for their preparation and use thereof
André Wehmeier, Bornheim (DE); Dominik Maschke, Erftstadt (DE); and Agnieszka Ochenduszko, Attinghausen (CH)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 18/250,405
Filed by Evonik Operations GmbH, Essen (DE)
PCT Filed Oct. 18, 2021, PCT No. PCT/EP2021/078743
§ 371(c)(1), (2) Date Apr. 25, 2023,
PCT Pub. No. WO2022/089971, PCT Pub. Date May 5, 2022.
Claims priority of application No. 20204259 (EP), filed on Oct. 28, 2020.
Prior Publication US 2023/0391630 A1, Dec. 7, 2023
Int. Cl. C01B 33/193 (2006.01); C08L 9/00 (2006.01)
CPC C01B 33/193 (2013.01) [C08L 9/00 (2013.01); C01P 2006/14 (2013.01)] 9 Claims
 
1. Precipitated silicas, having:
a N-cetyl-N,N,N-trimethylammonium bromide (CTAB) surface area ≤115 m2/g,
a dioctyl adipate (DOA) absorption ≥130 ml/(100 g),
a RoTap for >300 μm of ≥86%,
a silanol group density ≥5.4 OH/nm2, and
a pore volume distribution of V (d5−d50)/V (d5−d100)<0.66.