	US 11,806,690 B2
	Acid-treated filter aid blend
Jeffrey D. Taniguchi, Santa Maria, CA (US); and Larisa Tihomirov, Lompoc, CA (US)
Assigned to Imerys USA, Inc., Roswell, GA (US)
Filed by Imerys USA, Inc., Roswell, GA (US)
Filed on Nov. 18, 2020, as Appl. No. 16/950,943.
Application 16/950,943 is a division of application No. 16/073,417, granted, now 10,864,497, previously published as PCT/US2017/015425, filed on Jan. 27, 2017.
Claims priority of provisional application 62/288,218, filed on Jan. 28, 2016.
Prior Publication US 2021/0069670 A1, Mar. 11, 2021
Int. Cl. B01J 20/10 (2006.01); B01D 37/02 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/14 (2006.01); A23F 3/20 (2006.01); A23L 2/72 (2006.01); C12H 1/07 (2006.01)

CPC B01J 20/103 (2013.01) [A23F 3/20 (2013.01); A23L 2/72 (2013.01); B01D 37/02 (2013.01); B01J 20/10 (2013.01); B01J 20/106 (2013.01); B01J 20/14 (2013.01); B01J 20/28011 (2013.01); B01J 20/28092 (2013.01); B01J 20/30 (2013.01); B01J 20/3085 (2013.01); C12H 1/063 (2013.01); A23V 2002/00 (2013.01)]

19 Claims

1. A filter aid composition comprising:

a first acid-treated silica-based filter aid having a first particle size distribution; and

a second acid-treated silica-based filter aid having a second particle size distribution,

wherein the filter aid composition has a multimodal particle size distribution such that the first particle size distribution has a d₅₀of 15-30 μm and the second particle size distribution has a d₅₀of 2-10 μm;

wherein the first silica-based filter aid and the second silica-based filter aid are blended to form the filter aid composition.