# US 11,898,100 B2 · Compositions and methods for breaking foams and emulsions

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- Number: US 11,898,100 B2
- Document ID: US11898100B2
- Status: Granted
- Kind: B2
- Application number: 17/121,333
- Filed: 2020-12-14
- Published: 2021-06-17
- Granted: 2024-02-13
- Earliest claimed: 2019-12-14
- Assignees: Chevron U.S.A. Inc.
- Applicants: Chevron U.S.A. Inc.
- Inventors: Gayani W. Pinnawala; Sujeewa S. Palayangoda; Varadarajan Dwarakanath; Mohamad Salman; Mohsen S. Tagavifar
- Web page: https://patentgrep.com/patent/US11898100B2

## CPC

- C09K 8/86: containing organic compounds
- C09K 8/035: Organic additives
- C10G 33/04: with chemical means
- C09K 2208/26: Gel breakers other than bacteria or enzymes
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.

## Claims

### Claim 1

A method of breaking a foam, emulsion, or any combination thereof, the method comprising:
contacting the foam, emulsion, or any combination thereof with a breaking composition, wherein the breaking composition comprising a partitioning agent;
wherein the partitioning agent has an octanol/water partition coefficient ([P]) at 25°, and wherein the log of the partition coefficient at 25° (log[P]) is from 0.1 to 5.

### Claim 2 (depends on 1)

The method of claim 1, wherein the partitioning agent has a dielectric constant of from 1 to 50.

### Claim 3 (depends on 1)

The method of claim 1, wherein the partitioning agent comprises an alcohol, an ether, a non-ionic surfactant, or any combination thereof.

### Claim 4 (depends on 3)

The method of claim 3, wherein the partitioning agent comprises an alcohol, and wherein the alcohol comprises a branched C3-C10 alcohol.

### Claim 5 (depends on 3)

The method of claim 3, wherein the partitioning agent comprises an ether, and wherein the ether comprises an alkyl alkoxylate defined by the formula below
R1-Z(BO)-Y(PO)-X(EO)
wherein
R1 represents a branched or unbranched C1-C6 alkyl group or a phenyl group;
Z represents an integer from 0 to 35;
BO represents a butoxy group;
Y represents an integer from 0 to 35;
PO represents a propoxy group;
X represents an integer from 1 to 50; and
EO represents an ethoxy group.

### Claim 6 (depends on 3)

The method of claim 3, wherein the partitioning agent comprises a non-ionic surfactant, and wherein the non-ionic surfactant is defined by the formula below
R2-Z(BO)-Y(PO)-X(EO)
wherein
R2 represents a branched or unbranched hydrophobic carbon chain having 7-32 carbon atoms;
Z represents an integer from 0 to 35;
BO represents a butoxy group;
Y represents an integer from 0 to 35;
PO represents a propoxy group;
X represents an integer from 1 to 50; and
EO represents an ethoxy group.

### Claim 7 (depends on 3)

The method of claim 3, wherein partitioning agent comprises hexanol, isopropanol, 2-ethylhexanol, 4-methyl-2-pentanol, benzyl alcohol, isobutanol, sec-butanol, tert-butanol, pentaerythritol, ethylene glycol, ethylene glycol butyl ether (EGBE), diethylene glycol monobutyl ether (DGBE), triethylene glycol monobutyl ether (TEGBE), ethylene glycol dibutyl ether (EGDE), propylene glycol butyl ether, ethylene glycol monophenyl ether, phenol-2EO, phenol-4EO, phenol-1PO-2EO, phenol-2PO-2EO, a C8-C16 alkyl ethoxylate, or any combination thereof.

### Claim 8 (depends on 1)

The method of claim 1, wherein the breaking composition further comprises one or more defoamers, demulsifiers, or any combination thereof.

### Claim 9 (depends on 8)

The method of claim 8, wherein the one or more defoamers, demulsifiers, or any combination thereof comprise an oil-based defoamer, a water-based defoamer, a silicone-based defoamer, an alkyleneoxy-based defoamer, a polyacrylate defoamer, a ketone-based defoamer, a phenol-formaldehyde resin, an acid-catalyzed phenol-formaldehyde resin, a base-catalyzed phenol-formaldehyde resin, an epoxy resin, a polyamine, a polyol, a di-epoxide, a dendrimer, a star polymer, a zwitterionic surfactant, a cationic surfactant, or a combination thereof.

### Claim 10 (depends on 9)

The method of claim 9, wherein the one or more defoamers, demulsifiers, or any combination thereof comprise an oligo- and/or polysiloxane, polydimethylsiloxane, decamethylpentasiloxane, an organo-modified silicone, octamethylcyclotetrasiloxane, a silicone polyalkyleneoxide, a silicone glycol, a silicone co-polymer, a fluorosiloxane (e.g., trifluoropropylmethylsiloxane), a trimethylsiloxy-terminated polydimethylsiloxane, a trimethylsiloxy-terminated trifluoropropylmethylsiloxane, a alkylaryl siloxane, a polyether-modified polysiloxane, or any combination thereof.

### Claim 11 (depends on 1)

The method of claim 1, wherein the foam, the emulsion, or any combination thereof is present on or within equipment associated with an oil and gas operation.

### Claim 12 (depends on 11)

The method of claim 11, wherein the foam, the emulsion, or any combination thereof is present in a separator, and wherein the method comprises injecting the breaking composition into the separator, injecting the breaking composition upstream of the separator, injecting the breaking composition downstream of the separator, or any combination thereof.

### Claim 13 (depends on 12)

The method of claim 12, wherein the foam, the emulsion, or any combination thereof is present in a pipe, in a pipeline, in a wellhead, or any combination thereof, and wherein the method comprises injecting the breaking composition into the pipe, into the pipeline, into the wellhead, or any combination thereof.

### Claim 14 (depends on 13)

The method of claim 13, wherein the method comprises continuous injecting the breaking composition.

### Claim 15 (depends on 1)

The method of claim 1, wherein the foam, the emulsion, or any combination thereof comprises a produced fluid.

### Claim 16 (depends on 15)

The method of claim 15, wherein the produced fluid comprises an aqueous component, a hydrocarbon component, and one or more surfactants.

### Claim 17 (depends on 16)

The method of claim 16, wherein the one or more surfactants comprises one or more non-ionic surfactants, one or more anionic surfactants, one or more cationic surfactants, one or more zwitterionic surfactants, or any combination thereof.

### Claim 18 (depends on 17)

The method of claim 17, wherein the one or more surfactants comprise one or more non-ionic surfactants, and
wherein the one or more non-ionic surfactants comprises a branched or unbranched C6-C32:PO(0-65):EO(0-100), a branched or unbranched C6-C30:PO(30-40):EO(25-35), a branched or unbranched C6-C12:PO(30-40):EO(25-35), or a branched or unbranched C6-C30:EO(8-30).

### Claim 19 (depends on 17)

The method of claim 17, wherein the one or more surfactants comprise one or more anionic surfactants, and
wherein the one or more anionic surfactant comprise one or more of the following:
a branched or unbranched C6-C32:PO(0-65):EO(0-110)-carboxylate, a branched or unbranched C6-C30:PO(30-40):EO(25-35)-carboxylate, a branched or unbranched C6-C12:PO(30-40):EO(25-35)-carboxylate, or a branched or unbranched C6-C30:EO(8-30)-carboxylate;
a C8-C30 alkyl benzene sulfonate (ABS);
an internal olefin sulfonate (IOS);
an isomerized olefin sulfonate;
an alfa olefin sulfonate (AOS),
a sulfosuccinate surfactant;
an alcohol sulfate surfactant;
an alkoxy sulfate surfactant;
a surfactant defined by the formula below
R1-R2-R3
wherein
R1 comprises a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 6-32 carbon atoms and an oxygen atom linking R1 and R2;
R2 comprises an alkoxylated chain comprising at least one oxide group selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and any combination thereof; and
R3 comprises a branched or unbranched hydrocarbon chain comprising 2-12 carbon atoms and from 2 to 5 carboxylate groups;
a surfactant defined by the formula below
wherein
R4 is, individually for each occurrence, a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 6-32 carbon atoms; and
M represents a counterion;
or any combination thereof.