Biopowered - vegetable oil and biodiesel forum
Biodiesel => Biodiesel equipment => Topic started by: alifreddy on September 15, 2013, 09:36:19 AM
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using my new feedstock mcdonalds oil which is a blend of sunflower and rapeseed oil.
I did a 65 litre batch added about 12 litres methanol and base amount of koh per litre.
I was surprised to see no glycerol when I opened the drainpipe.
did a 50/50 shake test and it seperated quite quickly leaving clear water and no emulsions
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http://https://www.facebook.com/photo.php?fbid=299222293550201&set=a.115291161943316.16830.100003872979703&type=1&theater
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A strange result, what was the result of your 10/90 test ?
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don't have any clean methanol to do one. Must titrate the oil to see what it comes out at. Had this once before with brand new oil no glycerol the water does look a little cloudy in 50/50 test
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I left bio overnight in processor
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It's impossible to make biodiesel without producing glycerol.
We remove the glycerol molecules from the triglycerides and replace them with methanol molecules the glycerol then drops out.
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then should I add some more methanol and catalyst
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will try doing a 27/3 test that's all I can do to see if its reacted. Its probably cos I'm skimping on the methanol hat no glycerol I read that less methanol is better in reacted bio cos it holds soap
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dipped the top of processor and seems very clear liquid like methanol. adding another litre and 85 gs more koh to give the batch a push to react
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I think you are misunderstanding slightly.
Yes - in the finished bio product you want zero methanol. It seems the methanol holds the soap in solution.
However - you must add the correct amount of methanol for a reaction to take place. Skimping on it will stall the reaction - which seems to be what's happened here.
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kool thanks for the advise. I'm running out of methanol so had to make a smaller batch usually make 70-75 litres. seems to be dark puddles forming in my processor now.
When heater is on
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Worry ye not Julianf...methanol when mixed with a catalyst and blended with oil does not boil at 65C. Methanol as a liquid does....but not as a mixture.
However, I'm with you on asking the question..."how do you know there are dark pudles forming in the reactor"
BTW alifreddy you are not skrimping on methanol. If anything you are adding too much at 20%
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tried draining and gone a more orangy colour still no glycerol after an hour and a half settling looked in top of processor saw black puddles.
When I was heating
will only tell when I put it in my van if its ok or not think in the end put about 550gs koh and 13 litres methanol to 65 litres of good oil
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tried draining and gone a more orangy colour still no glycerol after an hour and a half settling looked in top of processor saw black puddles.
Whne I was heating
will only tell when I put it in my van if its ok or not think in the end put about 550gs koh and 13 litres methanol to 65 litres of good oil
Your Koh is only just enough for NEW veg let alone used.
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will only tell when I put it in my van if its ok or not
There are plenty of tests to see if your bio is good enough for your van or not! Don't just stick it in.
We may only be dealing with shed science here...but it's science nonetheless.
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did a 50/50 test and it split ok just need to buy some more methanol to do a 27/3 test
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for the amount of oil you have processed, there must be at least 15 lts of gly.
as Julian mentioned the amount of catalyst you have used is the minimum required to process new cooking oil.
you def need to do a 27/3 test and see what proportion of the 3 parts oil falls out, then add the catalyst that is needed, you need to add very little methanol, just to dissolve the catalyst
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did a titration and it took about 6.5 ml of sodium hydroxide solution to get a colour change quite heavily used oil.
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after 3 titrations 4ml for a 15 second change and 6ml for a permanent change quite heaviliy used oil
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so the value is 6.5= 6.5 grs per litre of oil plus the base rate, so you need to add the 6.5 grs per litre of oil, as you have already put in the base rate.
I would put in 5grs per litre with enought methanol ot get it to dissolve. and re process, then do a 27/3 test. good luck
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thanks guys got a reaction and 10 litres of glycerol and bright clear bio. will always titrate before do a batch now
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there is at least 5 litres of glycerol and 12 Lt's of methanol to account for. some of the methanol will be in the bio and some is in the glycerol
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its important I get my catalyst correct as my processor only heats to 50 degrees then cuts out with a thermostat. I have a plastic conical processor but was using a hot water copper tank with a tap on the bottom and always getting a full reaction with that cos it got very hot the heater packed up then it started to fall apart the stand and piping bought it for only 20 quid off ebay and resold it for 20 for scrap
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some pics of my set up
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later pic
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Wow look how clean it all is :)
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I know, all other members compeat to see who has the dirtist shed. maybe I''ll change as i get more batches under my belt :o
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I know, all other members compeat to see who has the dirtist shed. maybe I''ll change as i get more batches under my belt :o
No competition there my friend. Tony's shed is the dirtiest I've ever been in....closely followed by Jims ;)
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I know, all other members compeat to see who has the dirtist shed. maybe I''ll change as i get more batches under my belt :o
No competition there my friend. Tony's shed is the dirtiest I've ever been in....closely followed by Jims ;)
Now that has pee'd me off, I ain't used to coming second.
Anyone know where I can get some more good quality crap, I just gotta beat that young pretender?
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I'm now out of methanol found someone selling virgin grade on ebay 60 p per litre in Newark going on Saturday to get some.
how do I embed pictures on here??
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upload them somewhere and then, when you type the message, add the image url, highlight it, and then hit the little icon that is under the "B" and next to the globe.
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how do I embed pictures on here??
Do you ever read the replies to your posts? People take time and trouble to help you and appear to get ignored ... I'm starting to wonder why they bother.
SEE THIS THREAD ... http://www.biopowered.co.uk/forum/index.php/topic,1511.15.html
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I tried what u said but doesn't seem to work just makes a cross if I highlight link and press insert image dunno where I'm going wrong
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what link are you trying to post?
paste it into a message, plain text, so as we can check.
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was gonna take a pic of my processor and holding tank
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what link are you trying to post?
paste it into a message, plain text, so as we can check.
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Do you ever read the replies to your posts? People take time and trouble to help you and appear to get ignored ... I'm starting to wonder why they bother.