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US 2008/0177103 A1Published application
Biologically Degradable Gas Hydrate Inhibitors
OwnerDirk Leinweber, Michael Feustelinventors
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Abstract
The invention relates to tri- and tetracarboxylic acid ester of the formula (1) wherein R1 and R2 independently of one another are C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl or C7- to C30-alkylaryl, and A is a C2- to C4-alkylene group, B is an arbitrarily substituted organic group having 3-100 carbon atoms, n is a number from 1 to 30, m is 3 or 4, whereby the structural units —NR1-R2 are partly or completely quaternized and the use thereof as a gas hydrate inhibitor.
Claims6
A tri- or tetracarboxylic acid ester of formula (1)
- in which
- R1, R2 independently of one another are C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl or C7- to C30-alkylaryl, and
- A is a C2- to C4-alkylene,
- B is an optionally substituted organic group having 3-100 carbon atoms,
- n is a number from 1 to 30,
- m is 3 or 4,
- wherein it being possible for the structural units —NR1—R2 are partly or completely quaternized.
4 more elements
Dependencies are inferred from the claim text.