Corrosion inhibitors with improved water solubility and improved film persistence
AssigneeClariant GmbH
InventorsUwe Dahlmann, Michael Feustel
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Abstract
The invention relates to an additive, the use thereof and a method for inhibiting corrosion on conveyors and transport devices for hydrocarbons in crude oil transport and processing, whereby an effective amount of an inhibitor is added, containing doubly alkoxylated quaternary compounds. Compounds of formula (1), where R1, R2 independently=groups of formula —(B)—(O-A)n-O—CO—R5 (2), or -(A-O)n—(C)—CO—O—R5 (3), R3=C1 to C30 alkyl or C2 to C30 alkenyl, R4=an organic group with 1 to 100 carbon atoms optionally containing heteroatoms, R5=C1 to C30 alkyl or C2 to C30 alkenyl; n=1 to 20, A=a C2 to C4 alkylene group, B=a C1 to C10 alkylene group, C=a C1 to C6 alkylene group and X=an anion, are used as corrosion inhibitors.
Claims9
The use of compounds of the formula 1
- 5
- in which
- R1, R2, is a radical of the formula
- -(A-O)n—(C)—CO—O—R5 (3)
- R3 is C1- to C30-alkyl or C2- to C30-alkenyl
- R4 is an organic radical having 1 to 100 carbon atoms which optionally contains heteroatoms
- R5 is C1- to C30-alkyl or C2- to C30-alkenyl
- n is a number from 1 to 20
- A is a C2- to C4-alkylene group,
- C is a C1- to C6-alkylene group and
- X is an anion
- as corrosion inhibitors.
A compound of the formula (1), but where those compounds in which R4 does not contain a heteroatom and R1 and R2 simultaneously have the meaning given in formula (2) are excluded.
Dependencies are inferred from the claim text.