Oil anti-foulant and/or asphaltene agglomeration process

Patent metadata

Field	Value
Publication number	US-10995287-B2
Application number	US-201916707253-A
Country	US
Kind code	B2
Filing date	Dec 9, 2019
Priority date	Dec 20, 2018
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Fouling and/or asphaltene agglomeration (or flocculation) in midstream processes and transportation and in upstream transportation of a hydrocarbon oil is reduced by providing in the oil an additive combination including;
(A) a polyalkenyl-substituted carboxylic acid or anhydride, and (B) a metal detergent system comprising a hydrocarbyl-substituted hydroxybenzoate metal salt or a hydrocarbyl-substituted sulfonate metal salt or a mixure of both salts or a complex thereof,

where the mass:mass ratio of (A) to (B) is in the range of 20:1 to 1:20 and the treat rate of the additive is in the range of 5 to 10000 ppm by mass.

First claim

The invention claimed is:

1. A method for reducing fouling and/or asphaltene agglomeration (or flocculation) in midstream processes and transportation and in upstream transportation of a crude oil, including storage and blending, comprising providing in the crude oil an additive combination comprising:
(A) polyalkenyl-substituted carboxylic acid or anhydride, and
(B) a metal detergent system comprising a hydrocarbyl-substituted hydroxybenzoate metal salt or a hydrocarbyl-substituted sulfonate metal salt or a mixture of both salts or a complex thereof;

where the mass:mass ratio of (A) to (B) is in the range of 20:1 to 1:20, and the treat rate of the additive combination is in the range of 10 to 1000 ppm by mass.

2. The method of claim 1 wherein the mass:mass ratio of (A) to (B) is in the range of 10:1 to 1:10.

3. The method of claim 1 wherein die mass:mass ratio of (A) to (B) is in the range of 3:1 to 1:3.

4. The method of claim 1 wherein the treat rate of the additive combination is in the range of 500 to 1,000 ppm by mass.

5. The method of claim 1 where the midstream processes and transportation and the upstream transportation are according to ISO 20815 2018.

6. The method of claim 1 where the mass:mass ratio of (A) to (B) is in the range 1:1 to 1:6.

7. The method of claim 1 where the mass:mass ratio of (A) to (B) is in the range of 1:1 to 1:3.

8. The method of claim 1 where, in (A), the polyalkenyl substituent has from 8 to 400 carbon atoms.

9. The method of claim 1 where, in (A), the polyalkenyl substituent has a number average molecular weight of from 350 to 2000.

10. The method of claim 1 where, in (A), the polyalkenyl subsituent has a number average molecular weight of from 500 to 1000.

11. The method of claim 1 where (A) is a polyalkenyl-substituted succinic acid anhydride.

12. The method of claim 11 where (A) is a polyisobutene succimic acid anhydride.

13. The method of claim 1 where, in (B), the metal is calcium.

14. The method of claim 1 where, in (B), the hydrocarbyl-substituted hydroxybenzoate is a hydrocarbyl-substituted salicylate.

15. The method of claim 1 where, in (B), the hydrocarbyl group has from 8 to 100 carbon atoms.

16. The method of claim 1 where, in (B), each detergent in the metal detergent system has a TBN in a range with a lower limit of 0 and with an upper limit of 500.

17. The method of claim 1 wherein in (B), each detergent in the metal detergent system is present as an overbased detergent.

18. The method of claim 1 wherein the crude oil is additionally provided with one or more of emulsion-breakers (for demulsification), corrosion inhibitiors, hydrate inhibitors, scale inhibitiors, flow improvers, wax deposition inhibitors, pour-point depressants, viscosity improvers, and combinations thereof.

Assignees

• Infineum Int Ltd

Inventors

• Kerby Paul D
• Sutkowski Andrew C
• Maranski Krzysztof J
• Kyle Nichola

Classifications

• C10L1/188

  Carboxylic acids; {metal} salts thereof {(C10L1/1802, C10L1/1805, C10L1/1808, C10L1/1811, C10L1/1814, C10L1/1817 take precedence)} · CPC title

• C10L2230/08

  Inhibitors · CPC title

• C10L10/04

  for minimising corrosion or incrustation · CPC title

• C10L1/2437

  Sulfonic acids; Derivatives thereof, e.g. sulfonamides, sulfosuccinic acid esters · CPC title

• C10L1/195

  obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title