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Would it be feasible to mix fully hydrogenated oils with unsaturated oils (eg. soybean oil) to create an edible fat with the consistency of margarine?

If so, what is the motivation for interesterified oils? If not, then what is the constraint that prevents this? Do the fats not form a solution?

I'm trying to understand how palm oil came to replace partially hydrogenated oils in margarines in response to trans-fat bans, and what possible alternatives might be.

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The purpose of hydrogenation is to convert liquid oils into semi-solids at room temperature. Palm "oil" is unusual among natural vegetable oils/fats in that it is naturally fairly unsaturated and is thus a semi-solid at room temperature.

Economics is probably the driving factor preventing significant research into the solution (pun intended) you propose with mixing saturated and unsaturated fats to get the desired consistency. Hydrogenation techniques are cheap, well established, agency approved, etc. Same idea with palm oil.

I hope I hit the points of your question, comment if I missed anything.

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