Additives for inhibiting gas hydrate formation
AssigneesClariant GmbH, RF-Rogaland Research
InventorsPeter Klug, Malcolm Kelland
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Abstract
The instant invention relates to the use of water-soluble polymers comprising structural elements of the formula 1 wherein each R is independently H or C1-5-alkyl; X is H, an alkaline or earth alkaline metal or a quarternary ammonium group; R1 is H or C1-18-alkyl; and R2 is C1-18-alkyl; and wherein the alkyl groups represented by R1 and R2 may carry a hydroxy or amino substituent; and, if desired, a minor proportion of structural elements of the formula 2 wherein R, R1, R2 and X may have the meaning as above, and Alk is a C1-C5-alkylene chain, as additives for inhibiting the formation of gas hydrates in connection with hydrocarbon production and transportation.
Claims27
Use of a water-soluble polymer comprising structural elements of the formula
- 6
- wherein
- each R is independently H or C1-C5-alkyl;
- X is H, an alkaline or earth alkaline metal or a quarternary ammonium group;
- R1 is H or C1-C5-alkyl;
- and
- R2 is C1-C18-alkyl;
- and wherein the alkyl groups represented by R1
- and R2 may carry a hydroxy or amino substituent;
- and, if desired a minor proportion of structural elements of the formula
- 7
- wherein R, R1, R2 and X may have the meaning as above, and Alk is a C1-C5-alkylene chain,
- as an additive for inhibiting the formation of gas hydrates in connection with hydrocarbon production and transportation.
Use of a chemical compound of the formula
- 8
- wherein each R is independently H or C1-C5-alkyl;
- X is H, an alkaline or earth alkaline metal or a quaternary ammonium group;
- R1 is H or C1-C18-alkyl, hydroxy alkyl or amino alkyl;
- R2 is C1-C18-alkyl, hydroxy alkyl or aminoalkyl, as an additive for inhibiting the formation of gas hydrates in connection with hydrocarbon production and transportation.
Dependencies are inferred from the claim text.