In processor titrated water wash method

[nigelb]

Can't wait to try the ASM - I hate Koh!!

Dawson

I should find out tomorrow or Tuesday for the delivery and price of the next consignment of ASM. Be patient young man.

[db]

Thanks Nige!

Quick update.. I'm on my 10th wash is this normal? The sample still shows cloudy water. Guess I'll just keep going.

[nathanrobo]

Thanks Nige!

Quick update.. I'm on my 10th wash is this normal? The sample still shows cloudy water. Guess I'll just keep going.

Putting to one side the odd looking bio, it would seem that something went wrong, with this many washes.

[nathanrobo]

I'm on my 6th wash now. I'm adding 10 L water at a time to 75L bio. I knew this batch would be soapy due to running out of sodium and wanting to use up the potassium I still have. I used a whopping 1Kg to convert this batch (usually only around 400g)!!

Can't wait to try the ASM - I hate Koh!!

Dawson

Did you do a 10/90?

[db]

I'm on my 6th wash now. I'm adding 10 L water at a time to 75L bio. I knew this batch would be soapy due to running out of sodium and wanting to use up the potassium I still have. I used a whopping 1Kg to convert this batch (usually only around 400g)!!

Can't wait to try the ASM - I hate Koh!!

Dawson

Did you do a 10/90?

I did a 27/3. it took 4 stages to get a pass. There was the teeniest weeniest bit of drop out, I'm talking less than 0.1ml.

[Carrington]

I've got to be quick
I think you meth is duff or your oil was very wet .
This is why you needed so much base chems
Leave it to settle over night . Drop the water put more vinegar in
This batch could take some time

[db]

I've got to be quick
I think you meth is duff or your oil was very wet .
This is why you needed so much base chems
Leave it to settle over night . Drop the water put more vinegar in
This batch could take some time

Yep I'll do that. I'm wondering if the Koh is off because it's been stood for about 18 months, but in sealed containers.

Cheers.

[nathanrobo]

KOH shouldn't go stale, but it will absorb water right out of the air.  If the flakes are wet or sticking together, it's no good!

I used ASM for a while leaving my KOH that was already 18 months old, in a mango chutney container with a screw top.  I went back to KOH and it was fine.  I've had as little as 6% drop out after the first stage (2 stage no-titration).

Assuming that your KOH is okay, i'd guess it's as Paul says, you've got to look at the dryness of your feedstock or meth.

[nathanrobo]

btw 10/90 testing will allow you to be more accurate with dosing.  Uberveg has the glass centrifuge tubes really cheap.

[Head Womble]

Now I've not done that much water washing, but does that bio look amiss, it's just too light in colour.

[Carrington]

Very emulsified to me, too much base  I think this is why I think it was wet oil/meth this is what held back the reaction.
The problem is that the stage fails so you add more base when realy it just needs dry meth, this means that when you get final completion it's massively over dosed with base

[nathanrobo]

Very emulsified to me, too much base  I think this is why I think it was wet oil/meth this is what held back the reaction.
The problem is that the stage fails so you add more base when realy it just needs dry meth, this means that when you get final completion it's massively over dosed with base

There's another similar thing that happens... If the process stalls due to insufficient meth first stage, more meth is added and more lye, but if the fuel has excess lye, then adding to it just makes more soap, when what it actually needs is meth.

I've spoken to a number of folk who have had high drop outs on their 10/90 after first dose and then had a mare with water wash or used a lot of vinegar trying to neutralise it. 

Question is, will just adding more meth in with the glyc still present and continuing the 1st stage work?

[kamaangir]

I have had that and yes it will work with glyc present and insufficient meth. I used to mix my naoh in with half of my meth (easier to mix in a cubie with 12 litres rather than 24) and injected it and went off to do something else and forgot to inject the other 12 litres. Came back and had a massive dropout. Added the rest and got a 95% pass. I dropped the glyc.

I would only do a 2nd stage if my drop out was more than 10-15% as my cars ran on veg any way and it was better for me to not risk making excess soap by adding in more chemicals. 

[db]

I used 12L meth on 1st stage, with 400 koh.  I wish I'd titrated now, then I could eliminte or blame the Koh. I'm gonna drain water and add more vinegar. Should i add the vinegar until a clear 50/50 again?

[db]

I've added another 1.2 l of vinegar and the 50/50 water is clear.

I've done 4 more washes and still cloudy.