US 12,138,638 B2
Composition and method for use of 1-alkyl-5-oxopyrrolidine-3-carboxylic acids as collectors for phosphate and lithium flotation
Dirk Leinweber, Kelkheim (DE); Adriana Grossmann, Mühldorf (DE); Wagner Claudio Da Silva, São Paulo (BR); and Leandro Seixas Bicalho, Belo Horizonte (BR)
Assigned to Clariant International Ltd, Muttenz (CH)
Filed by Clariant International, Ltd., Muttenz (CH)
Filed on Sep. 9, 2021, as Appl. No. 17/470,795.
Prior Publication US 2023/0091787 A1, Mar. 23, 2023
Int. Cl. B03D 1/01 (2006.01); B03D 1/008 (2006.01); C02F 1/24 (2023.01); C07D 207/277 (2006.01); C02F 103/10 (2006.01)
CPC B03D 1/01 (2013.01) [B03D 1/008 (2013.01); C02F 1/24 (2013.01); C07D 207/277 (2013.01); B03D 2201/02 (2013.01); C02F 2103/10 (2013.01)] 19 Claims
 
1. A flotation agent for a phosphate or a lithium ore, comprising
from 70 to 99 wt.-%, based on the total weight of the flotation agent, of at least one fatty acid; and
from 1 to 30 wt.-%, based on the total weight of the flotation agent, of at least one 1-alkyl-5-oxopyrrolidine-3-carboxylic acid or 1-alkenyl-5-oxopyrrolidine-3-carboxylic acid according to formula (1)

OG Complex Work Unit Chemistry
or a combination thereof, wherein R is a C7 to C21 alkyl or alkenyl group.