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Soap with used cooking oilby vitorgil on June 11, 2009

Table of Contents

intro:   Soap with used cooking oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

step 1:   Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

step 2:   Soap recipe and fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

step 3:   Final preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

http://www.instructables.com/id/Soap-with-used-cooking-oil/

intro:  Soap with used cooking oilEasy and cheap way of making soap.Avoid the obstruction of kitchen pipes and the polution made by the used cooking oil!

step 1: MaterialsYou will need this materials to make a good home made soap.

Image Notes1. Caustic soda (NaOH)2. Used cooking oil3. Measuring cup4. Balance5. Protecting glasses6. Protecting mask7. Rubber gloves8. Softener from clothes

http://www.instructables.com/id/Soap-with-used-cooking-oil/

step 2: Soap recipe and fabricationFirst I will give you the base recipe for one liter of used cooking oil.

1 liter of used cooking oil200 grammes of caustic soda (NaOH)400 milliliters of warm water40 milliliters of softener for clothes

1. mesure the cooking oil and put on a recipient after filtering impurities out2. mesure the water3. weight the caustic soda4. dissolve the caustic soda with the water (use mask, glasses and protection gloves because the mixture will boil and release toxic gases)5. join the mixture with the oil6. stir 15 minutes with a wooden spoon, until the prepared becomes consistent and put the softener for clothes to give the soap softness and fragrance

Image Notes1. This could be a dangerous step (mixing the water with the caustic soda) protection gloves are missing here.

step 3: Final preparationsPut the soap in diferent recipient and let it dry two days. You will see when you can take it out of the containers when we turns white.

Let it curate two weeks, the soap will turn much more soften.

http://www.instructables.com/id/Soap-with-used-cooking-oil/

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Comments18 comments Add Comment

 sam12587 says:  Jun 25, 2009. 11:23 AM  REPLYDoes it just pop out of those accurate cups after curing??And can you just slice it up like a cake from that cat box or do you need to pop it out first?I might try this and I just want to make sure I understand the whole process & don't destroy my soap at the end :-)

 vitorgil says:  Jun 27, 2009. 2:45 AM  REPLYYes it's easy to pop out of the cups, you can do since you feel the soap have become solid then slice it.

 dchall8 says:  Jun 17, 2009. 1:46 PM  REPLYIf you are trying this in the US, find a recipe in ounces and pounds before you try it. Soap is a relatively safe chemistry experiment that can go dangerouslywrong if you make one simple mistake. Caustic soda (sodium hydroxide or lye) is not something to play around with.

 wolfsingleton says:  Jun 15, 2009. 5:53 AM  REPLYMy wife does a very similar method, but she scents the oil itself before reusing. If you plan ahead and have a dedicated vessel for the oil, place your 'scent'in the bottom before dumping in the hot oil. My wife collects lilacs from the yard and puts about one big handful of torn off petals into a 5 gallon bucket thenfills it about 3/4 with warm oil and then adds another handful of lilac petals. Cover the bucket and slosh around a few minutes before allowing to sit for acouple of days. When you filter, the leaves come out but the smell remains! We have also had some success using orange juice or peppermint leaves, butother options haven't come out too well.

Hope this helps with the scenting issue for those wanting to keep it natural. Keep up the great work.

 lemonie says:  Jun 11, 2009. 12:37 PM  REPLYBacon-aroma soap?

L

 vitorgil says:  Jun 11, 2009. 12:51 PM  REPLYNo way it will smell like real soap. Just try it!

 PKM says:  Jun 12, 2009. 5:48 AM  REPLYWould it be a good idea to clean and filter the oil first? I'm sure it makes good soap but I'd prefer to have soap without bits of food in it :)

 vitorgil says:  Jun 12, 2009. 9:45 AM  REPLYYes, you should clean the oil frist.

 lemonie says:  Jun 11, 2009. 1:14 PM  REPLYThanks - I actually want to make bio-diesel, but I might try it. You don't mention adding any fragrance, so I imagine the smell is just "soapy"?

L

http://www.instructables.com/id/Soap-with-used-cooking-oil/

 PKM says:  Jun 12, 2009. 6:01 AM  REPLYHmm, biodiesel you say? Do you have a source of "second generation" plant oil (ie. algae, jatropha, hemp)? WVO will work for now but I suspectit's only a matter of time before commercial recycling starts up- if collecting WVO, processing and paying fuel duty on it can be anything likecompetitive with petrodiesel then someone will do it, and then it won't be a waste product any more.

One of my pie-in-the-sky ideas is to set up a sunlight-to-diesel machine- imagine a basement-sized contraption with an algae bioreactor feedinginto a press for extracting oil, feeding into a biodiesel processor. A few solar panels outside for the energy needs (heating/blending/pumping etc)and you essentially have the green revolution in machine form.

 lemonie says:  Jun 12, 2009. 11:56 AM  REPLYI've got a pint-glass full of saturated animal-fat. However, looking out the back of the pub, I did see 3 drums of what must be used cooking oilfrom the take-aways a bit further down.Think how much stuff gets fried every day - it's going somewhere, but when it's been used for cooking it's potential fuel?

L

 iPodGuy says:  Jun 11, 2009. 3:23 PM  REPLYThey added fabric softener. That's where the scent comes from.

 lemonie says:  Jun 11, 2009. 11:34 PM  REPLYI'd thought that was only for making laundry-soap by the "for clothes", but looking at it again it's the way you put it.

L

 richardsalt says:  Jun 12, 2009. 8:31 AM  REPLYreally ingenious - thanks!

 Skip says:  Jun 11, 2009. 2:19 PM  REPLYI've heard -and don't take this as scripture- that the clear soaps are made by adding some alcohol to the mix. Anyone interested in attempting that?

 ericsgonzalez says:  Jun 11, 2009. 10:50 AM  REPLYi am confused. After it turns white, it should be used within two weeks? or after two weeks of curing?

 vitorgil says:  Jun 11, 2009. 12:29 PM  REPLYThe soap should be used after two weeks of curing.

 rimar2000 says:  Jun 11, 2009. 9:25 AM  REPLYThis is very useful, thanks.