Making the diester or biodiesel: Recipe

crude vegetable oil, diester, bio-ethanol or other biofuels, or fuel of vegetable origin ...
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chatelot16
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by chatelot16 » 27/12/09, 15:03

oiseautempete wrote: leave that to the industrialists who have the know-how and the technology to transform the products with a minimum of pollution and waste, as much of raw material as of energy ...


well then ! let the industrialists have the monopoly of knowledge and do not try to understand

stay ignorant and let yourself be plucked

made of chemistry, but only small experience with piles of product that change colors, but especially not to make useful products

of course it is a pity to imitate industrial process without mastering what we do, wasting and polluting

as long as we do not know everything it is only a small experience: the goal is to know more to do well

the big industrialists will never be able to make diester with recooked cooking oil

the big industrialists will never buy me my methanol of distillation of the wood: why not do a little diester?

I hope people who know more than me will read this and move us forward

do not make people fleeing!
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by chatelot16 » 27/12/09, 15:16

oiseautempete wrote:Methanol was used pure in racing cars until the 60 ... and is still used for dragster and model-making engines ... So say it's not a good fuel


of course he is very good at making race engines

but it is bad in energy per liter: even worse than ethanol

it is usable in a gasoline engine by modifying the wealth, but to make diester seems interressant also

remains to answer the real question? what is the difference between transesterification with methanol or ethanol?

is it a good method to use soda lye, which brings water? Would not it be better to mix 100% methanol and granulated sodium hydroxide to have a final product without water or glycerin will separate better?
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by delnoram » 27/12/09, 16:42

Cuicui wrote:
zac wrote:It also works with super 95 or white spirit.

Hello Zac
Do you use 95 gasoline or white spirit in an esterification process, or as a simple additive to improve the fluidity of the oil? Could you explain in more detail how you do, you who have a long experience in this area?


For Cuicui and all those who address zac, I recall that he has not written here since his departure to Madagascar there about 2 years and a half. :|
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by oiseautempete » 27/12/09, 19:28

chatelot16 wrote:
stay ignorant and let yourself be plucked


of course it is a pity to imitate industrial process without mastering what we do, wasting and polluting

the big industrialists will never be able to make diester with recooked cooking oil

the big industrialists will never buy me my methanol of distillation of the wood: why not do a little diester?

I hope people who know more than me will read this and move us forward

do not make people fleeing!


on a small scale this kind of manipulation has a ridiculous yield = waste of resources and unnecessary pollution ... have you taken into account the energy expenditure and the pollution of your wood alcohol or diester extractions? No doubt not if you abandon immediately so it's catastrophic!
Doing this kind of thing in time of war is understandable, because there is no other choice, but that's it!
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by chatelot16 » 27/12/09, 20:23

oiseautempete wrote:have you taken into account the energy costs and the pollution of your wood alcohol or diester extractions?


did you do it?

when I distil raw pyrolygneux to separate acetone, methanol and the rest I do it in winters when the wood heating is useful

the heat of the wood fire ends up heating the house through the still with the same efficiency as through a regular boiler

if the same thing was done in the industry the heat would be lost
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by Sim's » 28/12/09, 09:06

Hello
I have my methanol, 1.30 euro the liter by 20 liter.less expensive than alcohol to burn.
can we concentrate the laundry soda? note I will search the net.
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by chatelot16 » 28/12/09, 16:11

to remove water just heat in a saucepan

but atention the caustic soda only needs to absorb the CO2 of air to become sodium carbonate

as long as there is plenty of water, just a lid on the pan to avoid the presence of air and CO2: there is only water vapor: at the end the flow of steam becomes weak and the drying can last a long time, a simple cover is not enough anymore it needs a real tightness

the drying of the caustic soda is only useful for the one who manufactures the soda itself: because the caustic soda in grain is on the trade as easily and not as expensive as the lye of soda
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by Sim's » 28/12/09, 17:29

Indeed, the microperle soda is easy to find, the druggist had in stock.
he also has isopropyl alcohol.
I have rehearsed my food at 11 this morning: 3 liters of oil, 600 ml of methanol, 12 grams of soda, at 50 °, mixed for one hour.
glycerin is settling to the bottom. no "yellowish soap" on the surface, and what is becoming diester or biodiesel (neither of these names suits me) has well, let's call it The methyl ester! is perfectly clear and liquid.
I do not know if it will be energetically valid to distill the glycerine to recover the methanol, and wash the ester and distill the water after ... if I wash the ester, I will store the water while waiting for this where temperatures of 65 ° are attainable in full sun ...
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by chatelot16 » 28/12/09, 18:23

it is not because the methanol boils at 65 ° C that it suffices to heat water containing methanol at 65 ° C to have it

water containing 5% methanol boils almost at 100 ° C and makes steam richer in methanol but not pure methanol: it must be distilled several times and wasting energy to boil and condense water

it can of course be done in the summer with the sun, but it is done very well in winters using the heat of condensation for the heating of the house: the still serves as boiler
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by chatelot16 » 29/12/09, 14:09

distilling costs a lot of energy when there is water: when there is no water it goes much faster

distilling glycerine to recover methanol is obviously profitable

for the entire esther produced if the goal was to recover the methanol it would be better to distil everything than to put water

but why recover methanol? it's a fuel too, it will burn with the ether

The question is whether washing with water is useful for removing other harmful impurities? soda?

if washing with water is essential it will be necessary to recover the methanol ...
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