Phytosterol Esterification for Margarine Solidity
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Solution Overview
Problem
Phytosterols tend to form sharp needle-like crystals at ambient temperatures, making them difficult to work with in food products like margarines and bakery shortenings, and their cholesterol-lowering effectiveness is hindered by insolubility in edible fats.
Innovation Solution
Esterification of phytosterols with saturated fatty acids under controlled conditions, including the use of a catalyst and vacuum to achieve a substantially solid product suitable for use in margarines and bakery shortenings, while maintaining spreadability and enhanced cholesterol-lowering potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phytosterols are used in food products, then cholesterol-lowering effectiveness is improved, but the product becomes brittle and difficult to work with due to needle-like crystal formation
Solution Approach 1:
The patent combines phytosterols with edible fats or oils to create a composite material system. The phytosterols are incorporated into the fat matrix, which prevents their tendency to form needle-like crystals while maintaining their cholesterol-lowering functionality. This composite approach allows the beneficial health effects of phytosterols to be preserved while eliminating their adverse textural effects on food products.
2Reliability
If free sterols are incorporated into edible fats, then cholesterol-lowering ability is enhanced, but incorporation is difficult due to insolubility
Solution Approach 1:
The patent uses edible fats or oils as an intermediary medium to facilitate the incorporation of sterols into food products. Rather than attempting to incorporate free sterols directly into the food matrix, the sterols are first dissolved or dispersed in the edible fat, which acts as a carrier or intermediary. This approach overcomes the insolubility problem and enables effective incorporation while maintaining ease of manufacture.
3Reliability
If phytosterol esters are created with mono- and polyunsaturated fatty acids, then cholesterol-lowering potential is maintained, but the product becomes viscous or liquid at ambient temperature
Solution Approach 1:
The patent modifies the physical parameters of the phytosterol ester product by controlling the degree of esterification and selecting specific fatty acid compositions. By adjusting these parameters, the product can be formulated to remain stable and maintain appropriate consistency at ambient temperatures, rather than becoming overly viscous or liquid. This parameter optimization preserves cholesterol-lowering potential while ensuring ambient temperature stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting phytosterol ester products are substantially solid at ambient temperatures, providing improved spreadability and enhanced health benefits, making them suitable for margarines and bakery shortenings, with increased cholesterol-lowering potential compared to standard saturated fats.
Implementation Method 1
Esterification of phytosterols with saturated fatty acids under controlled conditions, including the use of a catalyst
Implementation Method 2
esterification reaction of a phytosterol material with a source of saturated fatty acid moieties under vacuum to eliminate the moisture produced during the reaction
Data Source
AI summary
An ingredient suitable for use in the manufacture of specialty margarines and bakery shortenings with nutritional and functional benefits is the reaction product of a phytosterol material esterified with a saturated fatty acid material. The reaction product is substantially solid at ambient temperature, and thus is suitable for use as an ingredient in solid shortening products, yet without the adverse health effects believed to be associated with saturated fatty acids. In the method of making the product, the esterification reaction is carried out at elevated temperatures, under vacuum, and for a relatively longer duration than prior art procedures. The esterification reaction may be carried out in the presence of a catalyst and optionally, high oleic canola oil. The reaction product is neutralized, then filtered at least once and preferably twice to remove any residual catalyst.