Asphaltene dispersant composition

Patent metadata

Field	Value
Publication number	US-10961475-B2
Application number	US-201916293768-A
Country	US
Kind code	B2
Filing date	Mar 6, 2019
Priority date	Mar 6, 2018
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

An asphaltene dispersant composition is provided. The composition may contain an alkylphenol copolymer having the following repeating units (A) and (B):

wherein,
x is an integer from 1 to 200; y is an integer from 2 to 200; R 1 is a straight or branched C 1 -C 15 alkyl; and R 2 is a straight or branched C 2 -C 40 alkyl, wherein R 2 is different than R 1 .

First claim

What is claimed is:

1. An asphaltene dispersant composition comprising an alkylphenol copolymer having the following repeating units (A) and (B):

wherein,
x is an integer from 1 to 200;
y is an integer from 2 to 200;
R 1 is a straight or branched C 1 -C 15 alkyl; and
R 2 is a straight or branched C 2 -C 40 alkyl, wherein R 2 is different than R 1 .

2. The asphaltene dispersant composition of claim 1 , wherein R 1 is C 8 -C 14 alkyl.

3. The asphaltene dispersant composition of claim 1 , wherein R 2 is C 16 -C 40 alkyl.

4. The asphaltene dispersant composition of claim 3 , wherein R 2 iS C 24 -C 32 alkyl.

5. The asphaltene dispersant composition of claim 1 , wherein the alkyl of R 2 contains 3 or more carbon atoms than the alkyl of R 1 .

6. The asphaltene dispersant composition of claim 1 , wherein x and y are independently from 5 to 25.

7. The asphaltene dispersant composition of claim 1 , where the ratio of the moles of repeating unit (A) to the moles of repeating unit (B) is from about 0.2 to about 3.

8. The asphaltene dispersant composition of claim 1 , wherein the number average molecular weight of the alkylphenol copolymer is from about 4,000 to about 60,000 Daltons.

9. The asphaltene dispersant composition of claim 1 , wherein the alkylphenol copolymer is a random copolymer.

10. The asphaltene dispersant composition of claim 1 , wherein the alkylphenol copolymer is a block copolymer.

11. The asphaltene dispersant composition of claim 10 , wherein the block copolymer is formed by a process that comprises:
reacting a phenol monomer used to form the repeating units (A) with a formaldehyde source in a first reaction vessel to form a first oligomer;
reacting a phenol monomer used to form the repeating units (B) with a formaldehyde source in a second reaction vessel to form a second oligomer; and
thereafter, reacting the first oligomer and the second oligomer with a formaldehyde source to form the block copolymer.

12. The asphaltene dispersant composition of claim 11 , wherein the ratio of the total number of moles of the formaldehyde source added to the first reaction vessel to the total number of moles of the phenol monomers used to form the repeating units (A) is from about 0.5 to about 1.

13. The asphaltene dispersant composition of claim 11 , wherein the ratio of the total number of moles of the formaldehyde source added to the second reaction vessel to the total number of moles of the phenol monomers used to form the repeating units (B) is from about 0.5 to about 1.

14. The asphaltene dispersant composition of claim 11 , wherein the phenol monomer used to form the repeating units (A) includes dodecylphenol.

15. The asphaltene dispersant composition of claim 11 , wherein the phenol monomer used to form the repeating units (B) includes butylphenol, nonylphenol, tetracosanylphenol, pentacosanylphenol, hexacosanylphenol, heptacosanylphenol, octacosanylphenol, or a combination thereof.

16. The asphaltene dispersant composition of claim 1 , wherein the composition exhibits an asphaltene dispersancy parameter of about 500 or less as determined at a non-volatile residue percentage of 15%.

17. The asphaltene dispersant composition of claim 1 , wherein the composition exhibits a percent asphaltene inhibition of about 50% or more as determined at a non-volatile residue percentage of 15%.

Assignees

• Si Group Inc

Inventors

• Doane Joseph T
• Chichak Kelly S
• Christofel Brian
• Shanklin Elliott W

Classifications

• C10G2300/80

  Additives · CPC title

• C08G8/10

  with phenol · CPC title

• C08L61/06

  of aldehydes with phenols · CPC title

• C10L10/14

  for improving low temperature properties · CPC title

• C10G71/00 Primary

  Treatment by methods not otherwise provided for of hydrocarbon oils or fatty oils for lubricating purposes · CPC title