Synergistic deposit control additive composition for diesel fuel and process thereof

Abstract

The present application relates to deposit control additive composition comprising of Mannich base and Polyisobutylene succinimide (PIBSI) having average molecular weight of about 800 as a synergistic component for hydrocarbon fuel, particularly diesel fuel along with other conventional additives such as fluidizer oil, dehazer, corrosion inhibitor, solvents, and optionally lubricity improver, antistatic agent and ignition accelerator to obtain diesel fuel composition. The application also relates to a process for the preparation of fuel composition by blending at an ambient temperature diesel fuel and deposit control additive formulation obtained by blending Mannich base, Polyisobutylene succinimide (PIBSI) fluidizer oil, dehazer, corrosion inhibitor, optionally lubricity improver, antistatic agent, ignition accelerator at a temperature ranging between 50° C. to 60° C. for a time period of up to 2 hours.

1 . A deposit control additive composition as a synergistic component for fuel, comprising: 
 a) a Mannich base; and    b) Polyisobutylene succinimide (PIBSA) having an average molecular weight ranging generally between about 700 and about 1000.    
   
   
       2 . A deposit control additive formulation comprising the deposit control additive composition of  claim 1  and fluidizer oil, a dehazer, a corrosion inhibitor, and a solvent.  
   
   
       3 . The additive composition of  claim 1 , wherein the ratio of PIBSA to the Mannich base is about 1:0.2 percent by weight.  
   
   
       4 . The composition of  claim 1  wherein the Mannich base is derived either from a reaction of a hydrogenated and distilled Cashew Nut Shell Liquid (CNSL) or from a reaction of a para substituted alkyl-phenol with an aldehyde and an amine having at least one reactive hydrogen atom.  
   
   
       5 . The composition of  claim 4  wherein the para substituted alkyl-phenol is para-nonyl phenol, the aldehyde is paraformaldehyde, and the amine is dibutylamine.  
   
   
       6 . A fuel composition, comprising: 
 a) a diesel fuel ranging from 99.90 to 99.99 percent by weight; and    b) the deposit control additive formulation of  claim 2  ranging from generally 0.01 to 0.10 percent by weight.    
   
   
       7 . A fuel composition of  claim 6 , wherein the diesel fuel is selected from a group consisting of cetane 45, cetane 46, cetane 47, cetane 48, cetane 49, cetane 50, and cetane 51.  
   
   
       8 . A fuel composition of  claim 6  wherein a concentration of the deposit control additive formulation ranges from 100 to 1000 milligram per liter.  
   
   
       9 . A process for the preparation of fuel composition, comprising: 
 i) obtaining the deposit control additive formulation of  claim 2  by mixing a Mannich base, Polyisobutylene succinimide, fluidizer oil, a dehazer, a corrosion inhibitor, and a solvent at a temperature ranging generally between 50° C. to 60° C. for a time period of up to 2 hours; and    ii) mixing the obtained deposit control additive formulation of step (i) with diesel fuel at an ambient temperature.    
   
   
       10 . The process of  claim 9 , wherein obtaining the deposit control additive formulation of  claim 2  further comprises mixing a lubricity improver, an antistatic agent and an ignition accelerator.  
   
   
       11 . The deposit control additive formulation of  claim 2 , further comprising a lubricity improver, an antistatic agent and an ignition accelerator.