	US 12,239,970 B2
	Method for reducing dilution effects in fluid treatment vessels
J. Marcus Slagt, Nisse (NL); and Maria de los angeles Perez Macia, Madrid (ES)
Assigned to DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US); and SPECIALTY ELECTRONIC MATERIAL NETHERLANDS BV, Dordrecht (NL)
Appl. No. 17/293,173
Filed by SPECIALTY ELECTRONIC MATERIALS NETHERLANDS BV, Hoek (NL); and DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
PCT Filed Nov. 19, 2019, PCT No. PCT/US2019/062106 § 371(c)(1), (2) Date May 12, 2021, PCT Pub. No. WO2020/112427, PCT Pub. Date Jun. 4, 2020.
Claims priority of provisional application 62/771,619, filed on Nov. 27, 2018.
Prior Publication US 2022/0001373 A1, Jan. 6, 2022
Int. Cl. B01J 47/022 (2017.01); B01J 49/05 (2017.01); B01J 49/50 (2017.01)

CPC B01J 47/022 (2013.01) [B01J 49/05 (2017.01); B01J 49/50 (2017.01)]

6 Claims

1. A fluid treatment apparatus comprising:

(a) a tank comprising a bed of at least one fluid treatment medium,

(b) a distributor plate separating the bed from an end portion of the tank, and

(c) at least one inert medium comprising amorphous particles having a harmonic mean diameter from 2.5 to 250 mm and a density from 0.57 to 0.998 cm³/g;

wherein the end portion has a total volume; and the volume of the end portion containing inert medium is from 25 to 95% of the total volume of the end portion; and

wherein the amorphous particles have an average sphericity from 0.7 to 1 and an average roundness from 0.4 to 1.