Polymeric Materials
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United States of America Patent
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Issued Date -
Sep 4, 2008
app pub date -
Nov 2, 2005
filing date -
Nov 10, 2004
priority date (Note) -
Abandoned
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Abstract
Copolymers, desirably having a molecular weight of from 500 to 20000, of aminoesters or aminoamides of (meth)acrylic acid and (meth)acrylamides at a molar ratio of from 10:1 to 60:1, particularly from 12:1 to 50:1 and especially about 20:1, can act as gas hydrate inhibitors in water containing hydrocarbon gas streams. Desirably the aminoesters or aminoamides are N-alkyl-amino(esters or amides) in particular of the formula (I): H.sub.2C.dbd.CR.sup.1 C(O)XR.sup.2NR.sup.3R.sup.4 (I) where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X have defined meanings and the (meth)acrylamides are of the formula (II): H.sub.2C.dbd.CR.sup.6C(O)NR.sup.7R.sup.8 (II) where R.sup.6, R.sup.7 and R.sup.8 have defined meanings. Methods of treating gas water mixtures using the copolymers to inhibit gas hydrate formation are described.
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