Microbial oils with lowered pour points, dielectric fluids produced therefrom, and related methods
First Claim
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1. A method of producing an RBD microbial oil, wherein the microbial oil has a pour point of less than about −
- 5°
C., and wherein the fatty acid composition of the microbial oil is at least 50 area % C18;
1 fatty acids and less than 10 area % C18;
2 fatty acids, as determined by fatty acid methyl ester gas chromatography flame ionization detection methods, the method comprising;
a. cultivating a genetically engineered microbe engineered to express one or more exogenous genes until the microbe has at least 10% oil by dry weight;
b. separating the oil from the microbe; and
c. subjecting the oil to refining, bleaching, deodorizing or degumming to produce RBD microbial oil.
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Abstract
Methods and compositions for the production of dielectric fluids from lipids produced by microorganisms are provided, including oil-bearing microorganisms and methods of low cost cultivation of such microorganisms. Microalgal cells containing exogenous genes encoding, for example, a sucrose transporter, a sucrose invertase, a fructokinase, a polysaccharide-degrading enzyme, a lipid pathway modification enzyme, a fatty acyl-ACP thioesterase, a desaturase, a fatty acyl-CoA/aldehyde reductase, and/or an acyl carrier protein are useful in manufacturing dielectric fluids.
219 Citations
16 Claims
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1. A method of producing an RBD microbial oil, wherein the microbial oil has a pour point of less than about −
- 5°
C., and wherein the fatty acid composition of the microbial oil is at least 50 area % C18;
1 fatty acids and less than 10 area % C18;
2 fatty acids, as determined by fatty acid methyl ester gas chromatography flame ionization detection methods, the method comprising;a. cultivating a genetically engineered microbe engineered to express one or more exogenous genes until the microbe has at least 10% oil by dry weight; b. separating the oil from the microbe; and c. subjecting the oil to refining, bleaching, deodorizing or degumming to produce RBD microbial oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 5°
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9. A method of producing a product comprising microbial oil, wherein the product has a pour point of less than about −
- 5°
C., and wherein the fatty acid composition of the microbial oil is at least 50 area % C18;
1 fatty acids and less than 10 area % C18;
2 fatty acids, as determined by fatty acid methyl ester gas chromatography flame ionization detection methods, the method comprising;a. subjecting a first microbial oil to refining, bleaching, deodorizing or degumming to produce RBD oil, wherein the RBD oil is characterized by an initial pour point and a first temperature; b. lowering the temperature of the RBD oil to a second temperature, which is lower than the first temperature; c. holding the RBD oil at the second temperature; and d. filtering the RBD oil at the second temperature to provide a second microbial oil characterized by a second pour point that is lower than the initial pour point, wherein the second pour point is less than about −
5°
C. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- 5°
Specification