Copolymer for inhibiting inorganic deposits

Patent metadata

Field	Value
Publication number	US-9115236-B2
Application number	US-200913144752-A
Country	US
Kind code	B2
Filing date	Dec 23, 2009
Priority date	Jan 16, 2009
Publication date	Aug 25, 2015
Grant date	Aug 25, 2015

Abstract

The invention relates to a copolymer having:
A) at least one monomer unit a) derived from at least one ethylenically unsaturated aliphatic monocarboxylic or polycarboxylic acid, a corresponding anhydride, or a corresponding water-soluble salt; B) at least one monomer unit b) derived from a particular sulfonated or sulfated ethylenically unsaturated ether or at least one monomer unit (b′) derived from a sulfonated ethylenically unsaturated monomer other than (b), C) at least one monomer unit (c) derived from a monomer with the average general formula [CH 2 ═CH—CH 2 —R 6 —O—] x P(═O)(OM) 3-x .

The invention also relates to a method for preparing such a copolymer, an inhibitor composition including such a copolymer, and a method for inhibiting inorganic deposits in a petroleum reservoir by means of said inhibitor composition.

First claim

The invention claimed is:

1. Copolymer comprising:
A) at least one monomer unit a) derived from at least one ethylenically unsaturated aliphatic monocarboxylic or polycarboxylic acid, a corresponding anhydride, or a corresponding water-soluble salt;
B) at least one monomer unit b) derived from an ethylenically unsaturated sulfonated or sulfated monomer unit b) with the formula (I)
CH 2 ═C(R 1 )—C(R 2 )(R 3 )—O—R′—Y − X +   (I)

in which formula the various symbols have the following meaning:
R 1 , R 2 , and R 3 , similar or different, represent
a hydrogen atom or
an alkyl radical

R′ represents a linear or branched divalent aliphatic radical comprising at least one OH substituent
Y − represents SO 3 − or SO 4 −
X is a counterion

or at least one monomer unit b′) derived from an ethylenically unsaturated sulfonated monomer unit other than (b) with the formula (II)
CH 2 ═C(R 1 )—(Z) n —R″—SO 3 − X +   (II)

in which formula the various symbols have the following meaning:
R 1 represents
a hydrogen atom or
an alkyl radical

n is equal to 0 or 1
Z represents a divalent group with the formula —C(O)—N(R 4 )—R 5 — where
R 4 represents a hydrogen atom or an alkyl radical
R 5 represents a linear or branched aliphatic divalent radical

R″ represents a linear or branched divalent aliphatic radical
X is a counterion; and

C) at least one monomer unit (c), wherein the at least one monomer unit (c) comprises a diphosphate ester derived from polyoxyethylene alkyl ether phosphate, wherein the polyoxyethylene alkyl ether phosphate has the general formula
[CH 2 ═CH—CH 2 —R 6 —O—] x P(═O)(OM) 3-x   (III)

Wherein:
R 6 is a polyoxyethylene group
x is a number between 1 and 2 inclusive or exclusive
M is a hydrogen atom or a cation counterion.

2. Copolymer according to claim 1 wherein, in formula (I) representing monomer (b):
R 1 represents
a hydrogen atom or
an alkyl radical containing 1 to 6 carbon atoms

R 2 , and R 3 , similar or different, represent
a hydrogen atom or
an alkyl radical containing 1 to 6 carbon atoms

R′ represents a linear or branched divalent aliphatic radical comprising at least one OH substituent and containing 1 to 6 carbon atoms
Y − represents SO 3 − or SO 4 −
X is a hydrogen, alkali metal, or ammonium counterion.

3. Copolymer according to claim 2 wherein monomer (b) is chosen from 3-(meth)allyloxy-2-hydroxy-1-propanesulfonic acids and their water-soluble salts, ammonium sulfate, and 1-(allyloxy)-2-hydroxypropyl or ammonium 1-(allyloxy)-2-hydroxypropyl sulfate.

4. Copolymer according to claim 3 wherein monomer (b) is the sodium salt of 1-allyloxy-2-hydroxy-1-propanesulfonic acid (AHPS).

5. Copolymer according to claim 1 wherein, in formula (II) representing monomer (b′):
R 1 represents
a hydrogen atom or
an alkyl radical

n is equal to 0 or 1
Z represents a divalent group with the formula —C(O)—N(R 4 )—R 5 — where
R 4 represents a hydrogen atom or an alkyl radical
R 5 represents a linear or branched aliphatic divalent radical

R″ represents a linear or branched divalent aliphatic radical
X is a counterion.

6. Copolymer according to claim 5 wherein, in formula (II) representing monomer (b′):
R 1 represents
a hydrogen atom or
an alkyl radical containing 1 to 6 carbon atoms

n is equal to 0 or 1
Z represents a divalent group with the formula —C(O)—N(R 4 )—R 5 — where
R 4 represents a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms
R 5 represents a linear or branched aliphatic divalent radical containing 1 to 8 carbon atoms

R″ represents a linear or branched divalent aliphatic radical
X is a hydrogen, alkali metal, or ammonium counterion.

7. Copolymer according to claim 6 wherein the monomer (b′) is chosen from:
sodium vinylsulfonate (SVS)
2-methyl-2-propene-1-sulfonic acid (SMS)
2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS)

and their water-soluble salts.

8. Copolymer according to claim 6 wherein, in formula (II) representing monomer (b′):
R 1 represents
a hydrogen atom or
an alkyl radical containing 1 to 3 carbon atoms

n is equal to 1
Z represents a divalent group with the formula —C(O)—N(R 4 )—R 5 — where
R 4 represents a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms
R 5 represents a linear or branched aliphatic divalent radical containing a C(CH 3 ) 2 — radical

R″ represents a linear or branched divalent aliphatic radical containing 1 to 7 carbon atoms
X is a hydrogen, alkali metal, or ammonium counterion.

9. Copolymer according to claim 2 wherein, in formula (I) representing monomer (b):
R 1 represents
a hydrogen atom or
an alkyl radical containing 1 to 3 carbon atoms,

R 2 , and R 3 , similar or different, represent
a hydrogen atom or
an alkyl radical containing 1 to 3 carbon atoms,

R′ represents a linear or branched divalent aliphatic radical comprising at least one OH substituent and containing 3 carbon atoms
Y − represents SO 3 − or SO 4 −
X is a hydrogen, alkali metal, or ammonium counterion.

10. Copolymer according to claim 9 wherein, in formula (I) representing monomer (b):
R 1 represents
a hydrogen atom or
an alkyl radical containing 1 carbon atom

R 2 , and R 3 , similar or different, represent
a hydrogen atom or
an alkyl radical containing 1 to 3 carbon atoms,

R′ represents a linear or branched divalent aliphatic radical comprising at least one OH substituent and containing 3 carbon atoms
Y − represents SO 3 −
X is a hydrogen, alkali metal, or ammonium counterion.

11. Copolymer according to claim 1 wherein the monomer (a) is chosen from acrylic acid, methacrylic acid, maleic anhydride, or their water-soluble salts.

12. Copolymer according to claim 11 where the monomer a) is chosen from acrylic acid or maleic anhydride.

13. Copolymer according to claim 1 wherein the at least one monomer unit (a) represents between 20% and 80% (as a molar percentage of the polymerized monomers), the at least one monomer unit (b) or (b′) represents between 10% and 70% (as a molar percentage of the polymerized monomers), and the at least one monomer unit (c) represents between 10% and 70% (as a molar percentage of the polymerized monomers).

14. Copolymer according to claim 1 wherein the average molecular mass (expressed by weight) of the copolymer according to the invention is preferably between 1000 and 50,000 g/mol.

15. Copolymer according to claim 1 wherein, the monomer unit (c) further comprises a monophosphate ester derived from polyoxyethylene alkyl ether phosphate.

16. Method for preparing a copolymer according to claim 1 comprising:
A) at least one monomer unit a) B) at least one monomer unit b) C) at least one monomer unit c) by radical polymerization in the presence of a polymerization initiator which is a free-radical initiator of:
A) at least one ethylenically unsaturated monocarboxylic or polycarboxylic aliphatic acid, a corresponding anhydride, or a corresponding water-soluble salt;
B) at least one ethylenically unsaturated sulfonated or sulfated ether with the formula (I)
CH 2 ═C(R 1 )—C(R 2 )(R 3 )—O—R′—Y − X +   (I)

in which formula the various symbols have the following meaning:
R 1 , R 2 , and R 3 , similar or different, represent
a hydrogen atom or
an alkyl radical

R′ represents a linear or branched divalent aliphatic radical comprising at least one OH substituent
Y − represents SO 3 − or SO 4 −
X is a counterion
or at least one monomer unit b′) derived from an ethylenically unsat

Assignees

• Adam Hervé
• Labarre Dominique
• Wilson James
• Argillier Jean-François
• Bazin Brigitte
• Gateau Patrick
• Herzhaft Benjamin
• IFP Energies Nouvelles
• Rhodia Operations

Inventors

• Adam Hervé
• Labarre Dominique
• Wilson James
• Argillier Jean-François
• Bazin Brigitte
• Gateau Patrick
• Herzhaft Benjamin

Classifications

• C08F220/06 Primary

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title

• C09K8/528

  inorganic depositions, e.g. sulfates or carbonates · CPC title

• C08F230/02

  containing phosphorus · CPC title

• C23F11/173

  Macromolecular compounds · CPC title

• C02F5/10

  using organic substances · CPC title