US 12,134,114 B2
Acidic cleaner
Sukhwan Soontravanich, Inver Grove Heights, MN (US); Chris Nagel, St. Paul, MN (US); Jennifer Stokes, Rosemount, MN (US); Claire Notermann, Sunfish Lake, MN (US); James S. Dailey, Grosse Ile, MI (US); Thomas B. Gessner, Ypsilanti, MI (US); and Joseph P. Borst, Plymouth, MI (US)
Assigned to ECOLAB USA INC., Saint Paul, MN (US)
Filed by ECOLAB USA INC., St. Paul, MN (US); and BASF SE, Ludwigshafen (DE)
Filed on Jun. 21, 2022, as Appl. No. 17/845,885.
Application 17/845,885 is a continuation of application No. 16/682,547, filed on Nov. 13, 2019, granted, now 11,421,191.
Claims priority of provisional application 62/767,797, filed on Nov. 15, 2018.
Prior Publication US 2022/0396751 A1, Dec. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C11D 1/72 (2006.01); B08B 3/08 (2006.01); B08B 3/10 (2006.01); C11D 1/722 (2006.01); C11D 3/04 (2006.01); C11D 3/20 (2006.01)
CPC B08B 3/08 (2013.01) [B08B 3/10 (2013.01); B08B 3/106 (2013.01); C11D 1/72 (2013.01); C11D 1/722 (2013.01); C11D 3/042 (2013.01); C11D 3/2075 (2013.01); C11D 3/2079 (2013.01); C11D 3/2082 (2013.01); C11D 3/2086 (2013.01); C11D 2111/20 (2024.01)] 30 Claims
OG exemplary drawing
 
1. A method of cleaning in place industrial biofuel equipment contaminated with solids comprising:
applying a composition to industrial biofuel clean-in-place equipment at a temperature of 40° C. or higher, the composition consisting of methane sulfonic acid, formic acid, phosphoric acid from 0.1% to 5.1% by weight of urea, and, optionally one or more additional ingredients selected from the group consisting of nonionic surfactants, builders, solvents, preservatives, corrosion inhibitors, anti-redeposition agents, fluorescing materials, and mixtures thereof, and having a pH of less than 4.0;
collecting the solids and the composition; and
processing the solids and the use solution for further use by animals.