Additives for inhibiting gas hydrate formation
AssigneeClariant GmbH
InventorsPeter Klug, Michael Feustel
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Abstract
The invention relates to the use of compounds of the formula (1) in which R1 is C1-C30-alkyl, C2-C30-alkenyl or a group of the formula —CH2—CO—NR2R3 or a C6-C18-aryl radical which may be substituted by a C1-C12-alkyl group, R2, R3 independently of one another, are hydrogen, C1-C6-alkyl or C5-C7-cycloalkyl, or R2 and R3, including the nitrogen atom to which they are bonded, form a ring of 4 to 8 ring atoms, it being possible for the ring also to contain oxygen or nitrogen atoms in addition to carbon atoms, A is a C2-C4-alkylene radical and n is an integer from 1 to 20, as gas hydrate inhibitors.
Claims7
A method of inhibiting gas hydrate formation in a multiphase mixture comprising combining the multiphase mixture with compounds of the formula (1)
- in which
- R1 is C1-C30-alkyl, C2-C30-alkenyl or a group of the formula —CH2—CO—NR2R3 or an aryl radical which is substituted by a C1-C12-alkyl group,
- R2, R3 independently of one another, are hydrogen, C1-C6-alkyl or C5-C7-cycloalkyl, or R2 and R3, including the nitrogen atom to which they are bonded, form a ring of 4 to 8 ring atoms, it being possible for the ring also to contain oxygen or nitrogen atoms in addition to carbon atoms,
- A is a C2-C4-alkylene radical and
- n is an integer from 1 to 20.
An additive for inhibiting gas hydrate formation, comprising
- A) a compound of the formula 1
- in which
- R1 is C1-C30-alkyl, C2-C30-alkenyl or a group of the formula —CH2—CO—NR2R3 or an aryl radical which is substituted by a C1-C12-alkyl group,
- R2, R3 independently of one another, are hydrogen, C1-C6-alkyl or C5-C7-cycloalkyl, or R2 and R3, including the nitrogen atom to which they are bonded, form a ring of 4 to 8 ring atoms, it being possible for the ring also to contain oxygen or nitrogen atoms in addition to carbon atoms,
- A is a C2-C4-alkylene radical and
- n is an integer from 1 to 20, and
- B) at least one water-soluble polymer selected from polyisopropylacrylamide, polyacryloylpyrrolidine, polyvinylcaprolactam, polyvinylpyrrolidone, copolymers of vinylcaprolactam with vinylpyrrolidone or N-vinyl-N-methylacetamide and copolymers which contain structural units of maleic acid or its anhydride or amide derivatives.
Dependencies are inferred from the claim text.