Phospholipid-based removal method of sterols from fats and oil

A technology of sterols and phospholipids, which is applied in the field of removing sterols in fat and oil based on phospholipids, can solve the problems of increasing the cost of waste, reduce deterioration, improve the value of nutritional medicines, reduce costs and the possibility of thermal deterioration of products Effect

Inactive Publication Date: 2000-02-16
CARGILL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical requirements, relatively complex steps, and waste generation add significantly to the cost of the method

Method used

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  • Phospholipid-based removal method of sterols from fats and oil
  • Phospholipid-based removal method of sterols from fats and oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add different proportions of distilled water and soybean lecithin (Lipotin A / UB, SR #19697 / 1 available from Lucas Meyer, Decatur, IL). The samples were stirred vigorously with a magnetic stirrer for 1 hour at ambient temperature, and then centrifuged at 3000 rpm (approximately 1000 xg) for 10 minutes in a benchtop centrifuge (IEC Clinical Centrifuge).

[0053] After centrifugation, the upper lipid layer was collected and analyzed for cholesterol content by gas chromatography. Oil samples were processed only once. This allowed the determination of the maximum amount of cholesterol removed in a single-step process under different conditions. The results are shown in Table 1 below:

[0054] Table 1

[0055] One-step process to remove cholesterol from fats

[0056] sample cholesterol * Lecithin: Water Lecithin: Fat Cholesterol removal

[0057] No. mg / 100g weight ratio weight ratio to percentage

[0058] ...

Embodiment 2

[0066] In the second experiment, an appropriate amount of distilled water was added to the same commercial soybean lecithin used in Example 1, and then heated to 60°C. The mixture was homogenized with a mechanical stirrer (Caframo model RZR1) for 15 minutes to form a slurry of lecithin and water. The remaining steps were performed at ambient temperature. Add the weighed lecithin-water paste into different amounts of the same type of liquid tallow used in Example 1, and mix thoroughly for 10 minutes with a high-speed shear mixer. Samples were then centrifuged at 10000 rpm (approximately 11400 xg) for 10 minutes in a Beckman J-21C floor-standing centrifuge. Separate the oily phase from the centrifuge bottle. The steps of contacting the once treated oil with the lecithin-water slurry, mixing, centrifuging and separating are repeated as many times as desired. Fresh lecithin-water paste was used for each repetition. The resulting cholesterol-depleted oil was then subjected to c...

Embodiment 3

[0073]In the third set of experiments, phosphatidylcholine derived from egg yolk (Sigma Chemical Co., St. Louis, MO; No. P-9671; phosphatidylcholine content about 60%) was used as a source of phospholipids. A slurry of phosphatidylcholine and water was prepared by mixing water and phosphatidylcholine in a weight ratio of 2:1 with a mechanical stirrer. The phosphatidylcholine used in this experiment contained only trace amounts of oil, whereas the soybean lecithin used in the previous examples contained about 50% by weight of oil. Thus, the phospholipid content of the 2:1 water to phosphatidylcholine slurry was approximately equal to the phospholipid content of the 1:1 water:lecithin slurry used in the previous examples. Liquid fats and oils (same type as in Examples 1 and 2) were treated with phosphatidylcholine-water paste with a ratio of phosphatidylcholine to fat of 1:20 to 1:10. The paste and fat were stirred rapidly with a mechanical stirrer for 30 minutes at ambient tem...

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PUM

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Abstract

Disclosed is a method for reducing the sterol, for example cholesterol, content of sterol-containing substances such as fats and oils. The method provides an efficient and cost effective process based on the phospholipid bilayers. Phospholipid aggregates are contacted with, for example, a sterol-containing fat or oil in an aqueous environment and then mixed. Following adequate mixing, the sterol-reduced fat or oil is separated from the aqueous separation mixture as shown in the figure. Alternatively, the corresponding sterol-enriched phospholipid also may be isolated from the aqueous separation mixture.

Description

Background of the invention [0001] Cholesterol is known to be an important factor in coronary heart disease, the leading cause of death in the United States. As such, many consumers are aware of the benefits of watching a diet that is low in saturated fat and cholesterol. According to a survey, 48% of American adults try to limit the amount of cholesterol in their daily diet (Science Council of Agriculture Technical Report No. 107, November 1985). Although dietary cholesterol intake has no decisive effect on the blood cholesterol levels of 70-80% of US adults, there is still a large market for products with less cholesterol, accounting for 20-30% of US adults (Sperber , Food Processing, November 1989, p. 155). [0002] Cholesterol-free or low-cholesterol foods are gaining popularity and market share as the relationship between high serum cholesterol levels and heart disease becomes clearer and cholesterol-free or low-cholesterol foods become more attractive to consumers. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C15/14A23K1/16C11B3/00C11B3/10
CPCA23K1/164C11B3/006C11B3/10A23C15/145A23K20/158
Inventor D·R·科达利
Owner CARGILL INC
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