Vapor space corrosion inhibitor

• US 2,889,276 A
• Filed: 03/30/1955
• Issued: 06/02/1959
• Est. Priority Date: 03/30/1955
• Status: Expired due to Term

• Current Assignee: Barrett, Jack P., Jones, Loyd W.
• Original Assignee: Barrett, Jack P., Jones, Loyd W.
• Inventors: Barrett, Jack P., Jones, Loyd W.
• Application Number:
  US03/498,114
• Time in Patent Office: 1,525 Days
• US Class Current: 507/250
• CPC Class Codes: C23F 11/02 in air or gases by adding vapour phase inhibitors
• CPC Class Codes: C23F 11/141 Amines; Quaternary ammonium compounds
• CPC Class Codes: Y10S 507/939 Corrosion inhibitor

Claims

1. A METHOD OF INHIBITING CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE COMPRISING ESTABLISHING IN SAID WATER A CONCENTRATION OF AT LEAST ABOUT 50 PARTS PER MILLION BY WEIGHT OF A FREE ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE, SAID MONOAMINE BEING PRESENT IN AN AMOUNT SUFFICIENT TO COMBINE WITH ONLY A MINOR AMOUNT OF THE HYDROGEN SULFIDE IN THE FLUIDS TREATED BY THE MONOAMINE.

9. A METHOD FOR INHIBITING IN A WELL CORROSION OF FERROUS METALS EXPOSED TO WATER CONDENSING FROM VAPORS CONTAINING HYDROGEN SULFIDE AND WATER VAPORS AS WELL AS CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE IN THE BOTTOM OF THE WELL COMPRISING INTRODUCING INTO SAID WELL A COMBINATION OF FROM ABOUT 10 TO 80 PERCENT BY WEIGHT OF A FREE LOW-BOILING ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE AND FROM ABOUT 20 TO 90 PERCENT OF A SALT OF A HIGH-BOILING ALIPHATIC AMINE AND A CABOXYLIC ACID, SAID HIGH-BOILING AMINE CONTAINING AT LEAST 10 CARBON ATOMS PER MOLECULE AND SAID ACID CONTAINING AT LEAST 6 CARBON ATOMS PER MOLECULE, AND SAID SALT CONSISTING OF FROM 1/2 TO 2 TIMES THE AMOUNT OF HIGH-BOILING AMINE NECESSARY TO-NEUTRALIZE SAID CARBOXYLIC ACID.