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Old 08-28-2004, 07:14 PM
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How do they make peanut oil?

Sure, this is a stupid question, but then, most of my questions in this forum are. Anyway, I don't get it. Peanut oil? How on earth do you possibly bleed oil from a peanut? It seems like it would be akin to marketing "gravel oil". So, what is it? Some kind of vegetable oil with microscopic peanut particles infused in it to give it flavor? I just can't figure it.
Old 08-28-2004, 07:20 PM
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Try this: press the edge of your fingernail against a shelled peanut for a few seconds. Don't press so hard that the peanut breaks up. Move your fingernail and look where you pressed. The peanut is most likely a bit darker in color and you may even see a trace of oil on your fingernail. Peanuts (actually a legume) contain quite a bit of oil. Put 'em in a press of some type and I'm sure you'd be surprised how much oil actually comes out of them.

What's really fun is to get a shelled brazil nut and light the end of it with a match or lighter. It burns like a candle because of all the oil contained in the meat.
Old 08-28-2004, 07:22 PM
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from here:
Quote:
Oil Extraction

Peanut Oils

Peanut oil is obtained by one of three methods, including hydraulic, expeller and solvent extraction methods. The hydraulic method of extraction consists of pressing the shelled peanuts under 14,000 psi, while adding steam and heat.

Expeller pressing is the most popular method of peanut oil extraction. Expeller pressing resembles a modern day meat grinder. Peanuts are fed into a grinder, and pressure is added as the screw turns. This forces the mass out through a perforated screen. The screen separates the oil from the proteinaceous material.

The solvent method is the most expensive of the three methods. It involves using hexane to extract oil from a peanut meal. This method is frequently combined with the expeller methods.
Old 08-28-2004, 07:22 PM
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Here you go:


Quote:
In extracting the oil in the U.S., the cleaned nuts are passed through hullers or shellers to separate the kernels. The kernels, which contain 48 to 56 percent of oil, are then crushed, heated and pressed hot in hydraulic presses. The oil is used in the manufacture of margarines and shortenings, and as a salad and cooking oil. The press cake is used for cattle food.
Old 08-28-2004, 07:23 PM
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Oops, I forgot to make my link work.
Old 08-28-2004, 07:47 PM
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Thanks, guys.
Old 08-28-2004, 08:03 PM
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So, how do they make baby oil?

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Old 08-28-2004, 08:32 PM
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You know when you open your half-used jar of peanut butter that you haven't opened for a while and you have to mix it up because there's oil settled out of it? What did you think that was, peanut tears?
Old 08-28-2004, 08:41 PM
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Quote:
Originally Posted by Rico
So, how do they make baby oil?
Obviously, it's extracted from soylent baby.
Old 08-28-2004, 08:50 PM
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I sometimes considered asking the following question, and this thread seems a perfect oportunity.

How comes nuts (peanuts, walnuts, hazelnuts, etc...) are so hard despite containing so much oil? What is the rest of the nut made of, besides oil? In what exactly is contained the oil? Are there "oil cells" in the nuts?
Old 08-28-2004, 09:28 PM
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Quote:
Originally Posted by woodstockbirdybird
So, what is it? Some kind of vegetable oil with microscopic peanut particles infused in it to give it flavor?
For the record, peanut oil does not taste like peanuts. It is prized for its high smoke point (does not scorch easily) and lack of flavor, so it is excellent for high temperature frying.
Old 08-28-2004, 09:58 PM
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Now, to me, it seems obvious that we have peanut oil...eat a lot of peanut and your hands will be a little greasy, no? But how in the Hell do we get vegetable oil? I have yet to encounter a vegetable that seems like it could provide oil.
Old 08-28-2004, 10:19 PM
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Seeds. Don't know what kind, though, but I think it comes from the seeds.
Old 08-28-2004, 10:44 PM
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Quote:
Originally Posted by chaoticdonkey
Seeds. Don't know what kind, though, but I think it comes from the seeds.
Oilseeds.

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Old 08-28-2004, 11:21 PM
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The one that's always stumped me, and I was going to do a GQ thread about, is olive oil. How do they get oil out of something so juicy? Do they press, and separate the oil from the liquid later?

Color me baffled.
Old 08-28-2004, 11:23 PM
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Quote:
Originally Posted by woodstockbirdybird
Sure, this is a stupid question, but then, most of my questions in this forum are. Anyway, I don't get it. Peanut oil? How on earth do you possibly bleed oil from a peanut?
It's done with very small oil derricks
Old 08-29-2004, 12:24 AM
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Quote:
Originally Posted by Cheesesteak
For the record, peanut oil does not taste like peanuts. It is prized for its high smoke point (does not scorch easily) and lack of flavor, so it is excellent for high temperature frying.
For the record, it actually depends on the peanut oil. I have a bottle of "Spectrum Naturals" brand unrefined (n.b.) peanut oil that imparts a pronounced peanut taste. And trust me when I say that peanut-flavored pancakes don't go too well with maple syrup.
Old 08-29-2004, 01:24 AM
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This thread is giving me a headache.
Old 08-29-2004, 01:25 AM
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They squeeze their nuts!
Old 08-29-2004, 01:36 AM
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Quote:
Originally Posted by Zsofia
You know when you open your half-used jar of peanut butter that you haven't opened for a while and you have to mix it up because there's oil settled out of it? What did you think that was, peanut tears?
I assumed it was my drool. I loves me some PB.
Old 08-29-2004, 07:44 AM
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Quote:
Originally Posted by bouv
Now, to me, it seems obvious that we have peanut oil...eat a lot of peanut and your hands will be a little greasy, no? But how in the Hell do we get vegetable oil? I have yet to encounter a vegetable that seems like it could provide oil.
Vegetable oil is almost always soybean oil. They mean vegetable in the "animal, vegetable, or mineral" sense, not in the "leafy green vegetable" sense. In other words, they mean oil that doesn't come from an animal.

FTR, peanuts are around 48% oil (by weight). If you want to see it for yourself, throw a bunch of shelled and roasted peanuts (maybe a little salt) in your food processor and process until smooth. Let it sit for a few hours and watch the oil rise to the top. Or, buy some "natural" peanut butter (the kind that doesn't contain hydrogenated oils in it). The ingredients list will usually just say "peanuts" and the jar will have a layer of oil sitting on top of the peanut butter.
Old 08-29-2004, 07:48 AM
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Oh, and also FTR soybeans (dried) contain about 18% oil. Oily for a bean, but it doesn't come close the to the oiliest bean, the peanut.
Old 08-29-2004, 08:04 AM
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Quote:
Originally Posted by Peanuthead
This thread is giving me a headache.

Quote:
Originally Posted by Kniz
They squeeze their nuts!
Old 08-29-2004, 09:24 AM
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Quote:
Originally Posted by Zsofia
You know when you open your half-used jar of peanut butter that you haven't opened for a while and you have to mix it up because there's oil settled out of it? What did you think that was, peanut tears?
May not actually be peanut oil, oddly enough.

Particularly in the case of cheap brands, peanut butter may be made from defatted peanut meal (a byproduct of the peanut oil extraction process) with some other kind of oil added (oibviously a cheaper one that peanut oil, or the process would be pointless), such as rapeseed (I think this is called canola in the USA) or palm oil.
Old 08-29-2004, 09:33 AM
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OK, sure, most vegetable oil is from soy...but what about corn oil? I can go buy a bottle of 100% corn oil. Do corn seeds have that much oil? But aren't the seeds the kernals? So maybe corn oil comes from a different part of the corn?
Old 08-29-2004, 10:03 AM
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All grains contain oil. Corn included. It is in the seed. Specifically, mostly in the germ and the hull and not in the endosperm (the soft, sugary part of sweet corn that tastes so good). Since corn used to produce corn meal or grits is hulled and degerminated first, producers have all of these germs and hulls left over that they can squeeze to get the oil out. Hybrid producers are also working on high oil corn varieties (mostly for llivestock feed).
Old 08-30-2004, 05:08 PM
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Quote:
Originally Posted by woodstockbirdybird
Sure, this is a stupid question, but then, most of my questions in this forum are. Anyway, I don't get it. Peanut oil? How on earth do you possibly bleed oil from a peanut? It seems like it would be akin to marketing "gravel oil". So, what is it? Some kind of vegetable oil with microscopic peanut particles infused in it to give it flavor? I just can't figure it.
Peanuts have a lot of oil in them. You're thinking of dried peanuts, I think. You make peanut oil pretty much the same way you make olive oil: by squeezing peanuts.

The question is, "how do they make baby oil?"
Old 08-30-2004, 05:55 PM
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Quote:
Originally Posted by Mathochist
The question is, "how do they make baby oil?"
That's easy. Babies are soft. It's machine oil that's a bitch to squeeze out.
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