Patent ID: 9221803
Filing Date: 2015-12-29
Classification: C07D,C10L,Y02P

Abstract:
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 R wherein: A is an integer between 0 and 8, B is a group selected among —H, —NH and D, E, F and G are independent radicals, selected from the groups consisting of: —H, —CH wherein said additive formulation when present in crude oil inhibits precipitation and disperses asphaltenes in crude oil at reservoir conditions.