Blending Xylol (Xylene) with waste Oil to make Blended Diesel Fuel - Diesel Forum -
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post #1 of 4 (permalink) Old 05-10-2011, 02:55 PM Thread Starter
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Blending Xylol (Xylene) with waste Oil to make Blended Diesel Fuel


Making vegetable oil blend Diesel Fuel (VOBDF) by blending Xylol with vegetable oil

The point of this experiment and video is simply to demonstrating that Xylene will dissolve readily into WVO. It is purely of academic interest and is in no way an attempt to encourage its use or recommend its use over petroleum distillates. I am just posting these experimental blending videos to show that there is a range of solvents that could be blended with waste oils to make diesel fuel. It is up to the user to decide whether they wish to further the experiment by running it on an engine. If you do, then please post your findings on this thread.

The point is making diesel fuel out of waste oils is a form of recycling. And, there are many people making viable and sustainable diesel fuels by blending various solvents with various waste oils. Therefore, there is no reason why the solvents used to thin waste oil need not also be recycled, therefore it is conceivable that someone may come across some recycled Xylene and consider using it as a solvent for making diesel fuel by blending it with waste oils.

Xylene Data Sheet
(from wiki)

dimethylbenzene (aka) Xylene or xylol is a mixture of three structural isomers of the aromatic hydrocarbon dimethylbenzene. Xylene is a clear, colorless, sweet-smelling liquid that is very flammable. It is usually refined from crude oil in a process called alkylation. It is also produced as a by-product from coal carbonisation derived from coke ovens, extracted from crude benzole from gas, or by dehydrocyclodimerization and methylating of toluene and benzene.[1] It is also manufactured from reformate.

Xylene is used as a solvent in the printing (Xylene is commonly found in ink), rubber, and leather industries. It is used as a cleaning agent for steel and for silicon wafers and chips.
It is used as a thinner for paint, and in paints and varnishes. It may be substituted for toluene to thin lacquers where slower drying is desired.
It is found in small amounts in gasoline and airplane fuel.
In animal studies it is often swabbed on the ears of rabbits to facilitate blood flow and collection, although the area must subsequently be cleansed with alcohol to prevent inflammation.
In histology, xylene is also used for clearing the tissues following dehydration in preparation for paraffin wax infiltration. It is also used after sections have been stained to make them hydrophobic so that a coverslip may be applied with a resin in solvent.
It is used as a carrier for acrylic based concrete sealers.
It is used in the laboratory to make baths with dry ice to cool reaction vessels to low temperatures when required, and as a solvent to remove synthetic immersion oil from the microscope objective in light microscopy [5]

Fuel uses:
Xylene has been used as a gasoline extender and even as a replacement for gasoline in spark ignited two and four-stroke gasoline engines.

Fuel Additive:
Xylene is the secret ingredient in many octane enhancers and fuel additives for both spark ignited two and four-stroke gasoline engines as well as an injector cleaner for diesel engines.

Chemical and physical properties:
Some chemical and physical properties differ from isomer to isomer. The melting point ranges from −47.87 C (−54.17 F) (m-xylene) to 13.26 C (55.87 F) (p-xylene). The boiling point for each isomer is around 140 C (284.00 F). The density of each is around 0.87 g/mL (7.26 lb/U.S. gallon or 8.72 lb/imp gallon) and thus is less dense than water.
Molecular formula C8H10, C6H4(CH3)2 or C6H4C2H6
Molar mass 106.16 g/mol
Appearance clear, colorless liquid
Density and phase 0.864 g/mL, liquid
Melting point Xylenes −47.4 C (−53.3 F; 226 K)
o-Xylene −25 C (−13 F; 248 K)
m-Xylene −48 C (−54.4 F; 225 K)
p-Xylene 13 C (55.4 F; 286 K)
Boiling point Xylenes 138.5 C (281.3 F; 412 K)
o-Xylene 144 C (291.2 F; 417 K)
m-Xylene 139 C (282.2 F; 412 K)
p-Xylene 138 C (280.4 F; 411 K)
Viscosity o-Xylene 0.812 cP at 20 C (68 F)
m-Xylene 0.62 cP at 20 C (68 F)
p-Xylene 0.34 cP at 30 C (86 F)

Health effects

Xylene exhibits neurological effects. High levels from exposure for acute (14 days or less) or chronic periods (more than 1 year) can cause headaches, lack of muscle coordination, dizziness, confusion, and alterations in body balance. Exposure of people to high levels of xylene for short periods can also cause irritation of the skin, eyes, nose, and throat, difficulty in breathing and other problems with the lungs, delayed reaction time, memory difficulties, stomach discomfort, and possibly adverse effects on the liver and kidneys. It can cause unconsciousness and even death at very high levels (see inhalants). Xylene or products containing Xylene should not be used indoors or around food. Xylene is not a controlled substance.

Studies of unborn animals indicate that high concentrations of xylene may cause increased numbers of deaths, and delayed growth and development. In many instances, these same concentrations also cause damage to the mothers. It is not yet known whether xylene harms the unborn fetus if the mother is exposed to low levels of xylene during pregnancy.

Besides occupational exposure, the principal pathway of human contact is via soil contamination from leaking underground storage tanks containing petroleum products. Humans who come into contact with the soil or groundwater may become affected. Use of contaminated groundwater as a water supply could lead to adverse health effects.
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post #2 of 4 (permalink) Old 05-12-2011, 10:54 PM
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great post!

I read somewhere on here that you dont want any brake fluid mixed in your WMO. is that true and why?

I have been thinking about adding a little Methanol to the blend to help remove water. Although I dont have any to speak of so Ive hesitated. We use it for race fuel and it is hydroscopic, would fall to the bottom of the tank.
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post #3 of 4 (permalink) Old 05-12-2011, 10:58 PM
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I did a test with 1.5% ethanol, the percentage that would be in a batch of W85 made with 10% ethanol RUG, to see if it had any dewatering effect and it did not. I would imagine methanol would be about the same.

1986 F350 Crew Cab 4wd DRW conversion. 1993 7.3 IDI, 5spd Sterling 10.25 4.10 rear, kingpin D60 4.10 front, 12" HD clutch. A Banks waste gated turbo. Midwest rebuilt IP turned up. AC Delco 6.5 GM 12V GP's, working great. Running W80-W85 high performance zero-gel black diesel! 4wd and dually conversion is done. Washer mod on the D60 kingpins eliminated the death wobble. Custom 10" C-channel front bumper with military D-rings front and rear. Pintle hitch, receiver hitch, and goose neck hitch. 7800lbs full of fuel....
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post #4 of 4 (permalink) Old 05-12-2011, 11:12 PM
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I dont really have a need for it. I settled this stuff for a week in 10- 55 gallon drums then skimmed the top 1/2 of each barrel and pumped it into a 275 gallon tote, added 15% rug and let it settle a week, no water on the bottom and very little sludge. So I kicked the 18 gpm pump on and started filtering. ( with the valve throttling it Its pumping at about 3-5 GPM).................... clogged the 30 micron filter off ( first one in line ) after about 6- 7 hrs of filtering.. pump slowed down and was only getting a trickle........ changed filter out and now I am back up to full speed again. Not sure when Im going to say its done. more filtering cant hurt.

Still have the absolute filter bypassed, I think Ill give it one more day of re circulating then let it run thru the absolute for a few hrs. @ 5GPM should have it all done in one hr of re circulating.

I took all the half barrels and combined them into full barrels and they are settling, Ill repeat the process of getting the top half, after a few weeks.

what I need right now is two more IBC totes! I have 250 gallons at the shop that needs to come home.

I plan to find some more totes Monday.
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