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US 4,395,353 AGranted
Polyanionic heteropolysaccharide biopolymers
AssigneePetroleum Fermentations N.V.
InventorsDavid L. Gutnick, Eugene Rosenberg, Igal Belsky, Zosim Zinaida
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AssigneePetroleum Fermentations N.V.
InventorsDavid L. Gutnick, Eugene Rosenberg, Igal Belsky, Zosim Zinaida
Estimating the term…
Growth of Acinetobacter Sp. ATCC 31012 on various substrates and under varying conditions has been used to produce two classes of extracellular microbial protein-associated lipopolysaccharides (the "emulsans") which, on a weight-for-weight basis, are probably the most efficient emulsifiers discovered and which possess certain characteristics that permit these unique extracellular microbial lipopolysaccharides to be widely used in cleaning oil-contaminated vessels, oil spill management, and enhanced oil recovery by chemical flooding. Emulsans and apoemulsans, both of which biopolymers are strongly anionic, exhibit a high degree of specificity in the emulsification of hydrocarbon substrates which contain both aliphatic and cyclic components. In addition, these extracellular microbial polysaccharides as well as their O-deacylated and N-deacylated derivatives are adsorbed on and capable of flocculating aluminosilicate ion-exchangers, such as kaolin and bentonite.
Polyanionic heteropolysaccharide biopolymers in which (a) substantially all of the sugar moieties are N-acylated aminosugars, a portion of which is N-acylated-D-galactosamine and another portion of which is N-acylated aminouronic acid, a part of the N-acyl groups of such heteropolysaccharide being N-3-hydroxydodecanoyl groups;
Dependencies are inferred from the claim text.