Reduction of sterols and other compounds from oils
A process for the removal of sterols, specifically cholesterol, from a triglyceride oil, preferably a marine triglyceride oil, said process comprising contacting an oil with an absorbent, specifically TRIS YL™, clay or a mixture thereof, heating the mixture to 100° C. to 210° C., preferably 150° C. to 170° C., preferably for a time period of greater than one minute and optionally at a pressure less than 133 Pa, preferably less than 1.33 Pa.
1. A composition comprising a semi-refined fish oil, wherein the composition comprises less than about 2 mg of sterol per gram of composition, at least about 97% triglycerides, less than about 2% diglycerides, and less than about 1% monoglycerides and wherein the composition has a p-Anisidine value of from about 10 to about 25, as determined by ISO 6885:1998.
2. The composition of claim 1 , wherein the fish oil comprises an Atlantic fish oil, Pacific fish oil, Mediterranean fish oil, light pressed fish oil, alkaline treated fish oil, heat treated fish oil, light and heavy brown fish oil, tuna oil, bonito oil, sea bass oil, halibut oil, spearfish oil, barracuda oil, cod oil, menhaden oil, sardine oil, pilchard oil, anchovy oil, capelin oil, Atlantic cod oil, Atlantic herring oil, Atlantic mackerel oil, Atlantic menhaden oil, salmonids oil, or combination thereof.
3. The composition of claim 1 , wherein the composition comprises an EPA to DHA wt. % ratio of about 60:0.3, about 18:12, about 5:25, or about 0.8:60.
4. The composition of claim 1 , wherein the composition comprises from about 1.1 to about 0.9 milligrams of sterol per gram of the composition.
5. The composition of claim 1 , wherein the composition comprises about 1.0 milligram of sterol per gram of the composition.
6. The composition of claim 1 , wherein the sterol is cholesterol.
7. The composition of claim 6 , wherein the cholesterol is in its free form and esterified form.
8. The composition of claim 1 , wherein the composition has a Gardner color of less than or equal to about 5, as determined by ASTM D 1544.
9. The composition of claim 1 , wherein the composition comprises linolenic acid, octadecatetraenoic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), docosapentaenoic acid (DPA), or a residue, derivatives, or mixture thereof.
10. The composition of claim 1 , wherein the composition comprises from about 10 to about 16 wt. % DHA.
11. The composition of claim 1 , wherein the composition comprises from about 14 to about 20 wt. % EPA.
12. The composition of claim 1 , wherein the composition has less than or equal to about 2 wt. % trans-fatty acids.