Crude oil composition including dispersant material for mitigating fouling of process equipment and method for mitigating crude oil fouling
View Patent ↗A crude oil composition wherein fouling has been mitigating and a method for mitigating crude oil fouling. The composition includes crude oil and an improved dispersant material for mitigating fouling which comprises a reaction product of a polyamine and a polyisobutylene succinyl anhydride made with a polyisobutylene having a vinylidene double bond content of at least 50%. The reaction product has an active nitrogen atom content of at least about 2% by weight. The reaction product is prepared by thermally reacting the polyisobutylene with maleic anhydride to produce said polyisobutylene succinyl anhydride and thereafter reacting the polyisobutylene succinyl anhydride with a polyamine having 5 to 7 active nitrogen atoms. The method includes providing the dispersant material and dispersing the same in crude oil.
1. A crude oil composition wherein fouling has been mitigated comprising crude oil and an anti-fouling amount of a dispersant material dispersed in said crude oil, said dispersant material comprising a reaction product of a polyamine and a polyisobutylene succinyl anhydride made with a polyisobutylene having a vinylidene double bond content of at least 50%, said reaction product having an active nitrogen atom content of at least about 2% by weight.
2. A crude oil composition as set forth in claim 1 , comprising from about 1 ppm to about 500 ppm of said dispersant material.
3. A crude oil composition as set forth in claim 1 , comprising from about 5 ppm to about 200 ppm of said dispersant material.
4. A crude oil composition as set forth in claim 1 , comprising from about 10 ppm to about 150 ppm of said dispersant material.
5. A method for mitigating crude oil fouling comprising:
providing a dispersant material comprising a reaction product of a polyamine and a polyisobutylene succinyl anhydride made with a polyisobutylene having a vinylidene double bond content of at least 50%, said reaction product having an active nitrogen atom content of at least about 2% by weight;
dispersing said dispersant material in crude oil wherein fouling is to be mitigated; and
subjecting said crude oil to processing in an environment conducive to the occurrence of fouling.
6. A method as set forth claim 5 , wherein said reaction product is prepared by thermally reacting said polyisobutylene with maleic anhydride to present said polyisobutylene succinyl anhydride, and thereafter reacting the polyisobutylene succinyl anhydride with a polyamine having 5 to 7 nitrogen atoms.
7. A method as set forth in claim 5 , wherein said reaction product has a number average molecular weight which ranges from about 400 to about 5000.
8. A method as set forth in claim 7 , wherein said reaction product has a number average molecular weight which ranges from about 500 to 2500.
9. A method as set forth in claim 5 , wherein said dispersant material has an active nitrogen atom content of at least about 4% by weight.
10. A method as set forth in claim 5 , wherein said dispersant material has an active nitrogen atom content of at least about 6% by weight.
11. A method as set forth in claim 6 , wherein said reaction product is prepared by reacting said polyisobutylene succinyl anhydride with a polyamine at a molar ratio within the range of from about 0.5:1 to about 5:1.
12. A crude oil composition wherein the tendency for fouling has been mitigated comprising crude oil and an antifouling amount of a dispersant material dispersed in said crude oil, said dispersant material comprising a reaction product of a polyisobutylene succinyl anhydride and a polyamine, wherein said polyisobutylene succinyl anhydride is characterized by having been prepared by thermally reacting a polyisobutylene with maleic anhydride, said reaction product having an active nitrogen content of at least about 2% by weight.
13. A crude oil composition as set forth in claim 12 , comprising from about 1 ppm to about 500 ppm of said dispersant material.
14. A crude oil composition as set forth in claim 12 , comprising from about 5 ppm to about 200 ppm of said dispersant material.
15. A crude oil composition as set forth in claim 12 , comprising from about 10 ppm to about 150 ppm of said dispersant material.
16. A method for mitigating crude oil fouling comprising:
providing a dispersant material comprising a reaction product of a polyamine and a polyisobutylene succinyl anhydride made with a polyisobutylene having a vinylidene double bond content of at least 50%, said reaction product having an active nitrogen atom content of at least about 2% by weight; and
dispersing said dispersant material in a crude oil wherein fouling is to be mitigated.
17. A method for mitigating crude oil fouling as set forth in claim 16 , wherein said polyisobutylene succinyl anhydride is characterized by having been made by a thermal process.
18. A method for mitigating crude oil fouling as set forth in claim 16 , wherein said reaction product has an active nitrogen atom content greater than 4.8% by weight.