Abstract: The present invention provides a corrosion inhibitor composition comprising: a carrier; at least one compound of formulae (II)-(VII) or a salt or quaternized derivative thereof: wherein R is C5-21 alkyl or alkenyl, preferably alkyl; each R1 is independently an optionally substituted group of formula —(CH2)nX wherein n is an integer from 1 to 6 and X is C(O)OZ or SO3Z and Z is H or a cation; and R? is C4-20 alkyl or alkenyl, preferably alkyl; and a quaternary ammonium compound.

Abstract: Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate.

Abstract: The present invention provides a corrosion inhibitor composition comprising: a carrier; at least one compound of formulae (II)-(VII) or a salt or quaternised derivative thereof: wherein R is C5-21 alkyl or alkenyl, preferably alkyl; each R1 is independently an optionally substituted group of formula —(CH2)nX wherein n is an integer from 1 to 6 and X is C(O)OZ or SO3Z and Z is H or a cation; and R? is C4-20 alkyl or alkenyl, preferably alkyl; and a quaternary ammonium compound.

Abstract: Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate.

Abstract: The present invention provides compositions of oil-soluble inhibitors suitable for use in inhibiting scale formation in a hydrocarbon production system, such as in an oil field. The compositions comprise an acid form of a known scale inhibitor and 2-ethylhexylamine and similar amines. These compositions possess advantages over conventional compositions used for inhibiting scale formation in that they are less toxic, more biodegradable, and less likely to invade the fatty tissues of marine life.