US 11,684,929 B2
Grinding stabilizing additive for vertical roller mills
Denise A. Silva, Los Alamitos, CA (US); Josephine H. Cheung, Lexington, MA (US); David F. Myers, Somerville, MA (US); Byong-Wa Chun, Honolulu, HI (US); Ernie Rocha, Merrimack, NH (US); Wee Fuk Lai, Singapore (SG); Leslie J. Buzzell, Burlington, MA (US); Jeffrey Thomas, Winchester, MA (US); and Joshua Detellis, Framingham, MA (US)
Appl. No. 16/485,716
Filed by GCP Applied Technologies Inc., Cambridge, MA (US)
PCT Filed Jan. 5, 2018, PCT No. PCT/US2018/012632
§ 371(c)(1), (2) Date Aug. 13, 2019,
PCT Pub. No. WO2018/147952, PCT Pub. Date Aug. 16, 2018.
Application 16/485,716 is a continuation in part of application No. PCT/US2017/058226, filed on Oct. 25, 2017.
Claims priority of provisional application 62/458,380, filed on Feb. 13, 2017.
Claims priority of provisional application 62/508,636, filed on May 19, 2017.
Prior Publication US 2020/0047188 A1, Feb. 13, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. B02C 23/06 (2006.01); B02C 23/18 (2006.01); C04B 7/52 (2006.01); C04B 24/02 (2006.01); C04B 24/06 (2006.01); C04B 24/10 (2006.01); C04B 24/12 (2006.01); C04B 24/16 (2006.01); C04B 24/00 (2006.01); C04B 24/38 (2006.01); B21B 27/02 (2006.01); C04B 103/52 (2006.01); C04B 103/60 (2006.01)
CPC B02C 23/06 (2013.01) [B02C 23/18 (2013.01); C04B 7/52 (2013.01); C04B 7/522 (2013.01); C04B 24/005 (2013.01); C04B 24/02 (2013.01); C04B 24/06 (2013.01); C04B 24/10 (2013.01); C04B 24/121 (2013.01); C04B 24/122 (2013.01); C04B 24/123 (2013.01); C04B 24/16 (2013.01); C04B 24/38 (2013.01); B21B 27/027 (2013.01); C04B 2103/52 (2013.01); C04B 2103/60 (2013.01)] 35 Claims
 
1. A method for grinding a solid in a vertical roller mill (VRM), comprising:
grinding at least one solid in the presence of a grinding stabilizing additive, wherein the grinding stabilizing additive comprises an alkanol amino acid compound or a disodium or dipotassium salt thereof having the structural formula:

OG Complex Work Unit Chemistry
wherein:
R1 is (C1-C4)alkyl-OH; and
R2 and R3, each independently, is (C0-C3)alkyl-COOR*, wherein R* is H, Na+, K+, or ½ Ca++, wherein the grinding stabilizing additive is a liquid.