US 11,814,581 B2
Corrosion inhibiting acid mixture containing monoamine / diamine and method of inhibiting corrosion in acid treatment
Ali Abdullah Al-Taq, Qatif (SA); Shaikh Asrof Ali, West Bengal (IN); and Abdullah Alrustum, Al-Taraf (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and KING FAHD UNIVERSITY OF PETROLEUM & MINERALS, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and KING FAHD UNIVERSITY OF PETROLEUM & MINERALS, Dhahran (SA)
Filed on Jan. 19, 2022, as Appl. No. 17/648,388.
Prior Publication US 2023/0227714 A1, Jul. 20, 2023
Int. Cl. C09K 8/74 (2006.01); C09K 8/54 (2006.01); E21B 37/06 (2006.01); E21B 43/27 (2006.01)
CPC C09K 8/74 (2013.01) [C09K 8/54 (2013.01); E21B 37/06 (2013.01); E21B 43/27 (2020.05); C09K 2208/32 (2013.01)] 6 Claims
 
1. An acid mixture, comprising:
hydrochloric acid;
a monoamine corrosion inhibitor;
a diamine corrosion inhibitor;
an acid additive; and
an intensifier comprising formic acid and potassium iodide,
wherein the acid mixture comprises formic acid in an amount ranging from 3.5 g/100 mL to 10 g/100 mL of the acid mixture, and
wherein the acid additive is comprised in an amount of 1 gallon to 100 gallons per 1000 gallons of the acid mixture (gpt).