Corrosion inhibitors with improved water solubility and improved film persistence

US7160507B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Uwe Dahlmann · Heidelberg, DE
• Michael Feustel · Kelkheim, DE

Key dates

• Filing date: Jun 27, 2002
• Grant date: Jan 9, 2007
• Expiry date: Nov 2, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/141
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to an additive and to a method of corrosion inhibition on devices for the recovery and transportation of hydrocarbons in crude oil recovery and processing by adding an effective amount of an inhibitor. The inhibitor comprises an alkoxylated quaternary compounds of the formula 1where R1, R2 are independently groups of the formula —(B)—(O—A)n—O—CO—R5 or —(A—O)n—(C)—CO—O—R5, R3 is C1— to C30-alkyl or C2— to C30-alkenyl, R4 is an organic radical with 1 to 100 carbon atoms optionally containing heteroatoms, R5 is an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C1— to C6-alkylene group and X is an anion, used as corrosion inhibitors.