US 12,378,494 B2
Corrosion inhibitor and industrial lubricant including the same
David Edwards, Richmond, VA (US); Helen Ryan, Sheen (GB); and Robert Mccovick, Chesterfield, VA (US)
Assigned to Afton Chemical Corporation, Richmond, VA (US)
Filed by Afton Chemical Corporation, Richmond, VA (US)
Filed on Nov. 9, 2023, as Appl. No. 18/505,646.
Claims priority of provisional application 63/424,383, filed on Nov. 10, 2022.
Claims priority of application No. 2217954 (GB), filed on Nov. 29, 2022.
Prior Publication US 2024/0174939 A1, May 30, 2024
Int. Cl. C10M 135/36 (2006.01); C07D 285/125 (2006.01); C10M 137/12 (2006.01); C10M 141/10 (2006.01); C10M 169/04 (2006.01); C10N 30/12 (2006.01); C10N 40/02 (2006.01)
CPC C10M 135/36 (2013.01) [C07D 285/125 (2013.01); C10M 137/12 (2013.01); C10M 141/10 (2013.01); C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2219/106 (2013.01); C10M 2223/06 (2013.01); C10N 2030/12 (2013.01); C10N 2040/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A corrosion inhibitor made by a process comprising:
(a) reacting a 1,3,4-dimercapto thiadiazole or alkali metal salt thereof with an alkyl mercaptan in the presence of an acid to form a first reaction intermediate;
(b) reacting the first reaction intermediate with hydrogen peroxide to form the corrosion inhibitor; and
(c) wherein the 1,3,4-dimercapto thiadiazole or alkali metal salt thereof, the alkyl mercaptan, and the hydrogen peroxide are provided at a molar ratio of 1:1.95-2.15:2.1-2.4.