Polyalkyl phosphonated polyol ether based scale inhibitors
AssigneeChampionX LLC
InventorsGedeng RUAN, Clare Johnston, Chris Popeney, II, Wei Lu
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Abstract
Scale inhibitor compositions that include at least one polyalkyl phosphonated polyol ether. A method of inhibiting scale that includes contacting an aqueous fluid with a scale inhibitor composition comprising at least one polyalkyl phosphonated polyol ether.
Claims23
A scale inhibitor composition comprising a polyalkyl phosphonated polyol ether having a structure represented by Formula I:
- wherein,
- each W is —OH or
- each R1 and R2 is independently selected from —H, —W, and —CH2OH;
- R3 is absent or —CH2— and when R3 is absent, O is attached to C that is connected to R1 and R2;
- each R4 is independently selected from —H, —CH3, —CH2CH2OH, —CHZCO2H, and —CH2P(O)(OH)2, wherein at least one R4 is —CH2P(O)(OH)2;
- each X independently is absent or —NHCH2CH2— and when X is absent, N(R4)2 is attached to C that is connected to X;
- each Z independently is a side chain of an amino acid;
- and
- n is an integer selected from 1, 2, 3, 4, 5, 6, 7 and 8,
- wherein when W is —OH and R3 is absent, R1 and R2 are not —H;
- wherein when R1 and R2 are H and R3 is absent, W is not —OH;
- wherein when R3 is absent, W is not —OH or R1 and R2 are not —H.
A scale inhibitor composition comprising a polyalkyl phosphonated polyol ether having a structure represented by Formula II:
- wherein,
- each R1 and R2 is independently selected from —H, —OR5, and —CH2OH;
- R3 is absent or —CH2— and when R3 is absent, O is attached to C that is connected to R1 and R2;
- each R4 is independently selected from —H, —CH3, —CH2CH2OH, —CHZCO2H, and —CH2P(O)(OH)2, wherein at least one R4 is —CH2P(O)(OH)2;
- each R5 is independently H or —CH2CH(OH)CH2N(R4)2;
- each X independently is absent or —NHCH2CH2— and when X is absent, N(R4)2 is attached to C that is connected to X;
- each Z independently is a side chain of an amino acid;
- and
- n is an integer selected from 1, 2, 3, 4, 5, 6, 7 and 8.
A scale inhibitor composition comprising a polyalkyl phosphonated polyol ether having a structure represented by Formula IIa, IIb, or IIc:
- wherein,
- each R4 is independently —H or —CH2P(O)(OH)2, wherein at least one R4 is —CH2P(O)(OH)2;
- each R5 independently is H or —CH2CH(OH)CH2N(R4)2;
- and
- each X independently is absent or —NHCH2CH2— and when X is absent, (NR4)2 is attached to C that is connected to X.
A scale inhibitor composition comprising a polyalkyl phosphonated polyol ether having a structure represented by Formula Hal, IIa2, IIa3, IIa4, IIb1, or IIc1:
- wherein,
- each R4 is independently —H or —CH2P(O)(OH)2, wherein at least one R4 is —CH2P(O)(OH)2.
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Dependencies are inferred from the claim text.