US 11,905,604 B2
Formulation for corrosion inhibition
Raghava Krishna Kanala, Bangalore (IN); Naresh Kottari, Bangalore (IN); Venkateswarlu Cheerladinne, Bangalore (IN); Srinivasa Rao Ganagalla, Bangalore (IN); Ramkumar Mangala, Bangalore (IN); Bojja Ramachandrarao, Bangalore (IN); Venkat Chalapathi Rao Peddy, Bangalore (IN); Venkateswarlu Choudary Nettem, Bangalore (IN); and Sriganesh Gandham, Bangalore (IN)
Assigned to Hindustan Petroleum Corporation Limited, Mumbai (IN)
Appl. No. 16/758,607
Filed by Hindustan Petroleum Corporation Limited, Mumbai (IN)
PCT Filed Oct. 23, 2018, PCT No. PCT/IN2018/050686
§ 371(c)(1), (2) Date Apr. 23, 2020,
PCT Pub. No. WO2019/082205, PCT Pub. Date May 2, 2019.
Claims priority of application No. 201721037647 (IN), filed on Oct. 24, 2017.
Prior Publication US 2021/0180193 A1, Jun. 17, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C23F 11/14 (2006.01)
CPC C23F 11/143 (2013.01) 19 Claims
OG exemplary drawing
 
1. A corrosion inhibitor formulation comprising:
a) at least one quaternary ammonium salt in a range of 10-50 weight % with respect to the formulation;
b) at least one fatty acid methyl ester in a range of 10-50 weight % with respect to the formulation;
c) at least one viscosity reducing agent in a range of 0-5.0 weight % with respect to the formulation; and
d) at least one solubilizing agent in a range of 0.3-3 weight % with respect to the formulation,
wherein the at least one quaternary ammonium salt to the at least one fatty acid methyl ester weight ratio is in a range of 1:0.2-1:5.0.