Patent ID: 7731768

Claim:
A fuel emulsion comprises a water-in-diesel emulsion containing an emulsifier composition in an amount effective to form a stable emulsion, the emulsifier composition comprising: (i) a polyester non-ionic surfactant having hydrophilic repeating units comprising polyoxyalkylene and hydrophobic repeating units comprising long chain hydrocarbon residues; and (ii) at least one component selected from: a) fatty acid esters or partial esters of polyhydric alcohols; b) alkoxylated fatty acid esters or partial esters of polyhydric alcohols; and c) alkoxylated primary alcohols; wherein: 1) the polyester non-ionic surfactant has a hydrophile/lipophile balance value of between 4 and 8, and 2) the emulsifier composition has an hydrophile/lipophile balance value of at least 4 and not more than 8; 3) the fuel emulsion is stable for at least 10,000 minutes.