| 摘要 |
The present invention relates to formulations of asphaltenes' inhibitor-dispersant additives based on oxazolidine derived from polyalkyl or polyalkenyl N-hydroxyalkyl succinimides. Said formulations can contain inert organic solvents, preferably including: toluene, mixtures of xylene, o-xylene, p-xylene, kerosene, turbo-fuel; or inert hydrocarbon solvents having boiling points within the range of gasoline and diesel; or inert hydrocarbon or organic solvents having a boiling point within a range from 75 to 300° C. The ratio in weight of inert organic solvents to additive that prevents and controls the precipitation and deposition of asphaltenes ranges from 1:9 to 9:1, preferably from 1:3 to 3:1. |
| 主权项 |
1. An asphaltene dispersant-inhibitor additive formulation, said additive formulation comprising an oxazolidine derived from polyalkyl or polyalkenyl N-hydroxyalkyl succinimides as a main active component and inert organic solvents, said oxazolidine having the formula: wherein R is a polyalkyl or polyalkenyl group having an average molecular weight within the range from 450 to 5000 Daltons; m is an integer having values between 1 and 5; n is an integer between 0 and 1; and R1, R2, R3 and R4 are independent radicals represented by the groups —H, —CH2(CH2)AB, —C6H3DE or —C10H4FG; wherein: A is an integer between 0 and 8, B is a group selected among —H, —NH2, —OH, —COOH; and D, E, F and G are independent radicals, selected from the groups consisting of: —H, —CH3, —CH2CH3, —CH2CH2CH3, —CH2(CH2)2CH3, —(CH3)3, C6H5, —NH2, —OH, —OCH3, OCH2CH2OH, OCH(CH3)CH2OH, and OC6H5—COOH, —SO3, wherein said additive formulation when present in crude oil inhibits precipitation and disperses asphaltenes in crude oil at reservoir conditions. |
