Reprocessing with HMPEs

[1958steveflying]

Initial mix was 45l creamy HMPEs and 80l WVO (36% HMPEs).  Whole lot heated to 100C and melted to clear liquid.

I took a sample from this, which is currently showing about 20% HMPE formation (11 days on).

I made bio with this mix, and took a sample (after bubbling trace Methanol off).  This shows about 3-4% HMPE formation tops (11 days on).  The weather has been bitterly cold - plenty of thermal cycling!

I'm hoping this is representative of the 125l I've got standing - if so I'm definitely keeping all my HMPEs from this point forward for reprocessing.

I don't understand why, but it seems to work!

That's really interesting results Tony, I for one would love to know exactly what HMPE's are.

[Head Womble]

I have accumulated around 100L of HMPE's, so I'm very pleased to read your findings.

[1958steveflying]

I have accumulated around 100L of HMPE's, so I'm very pleased to read your findings.

What am I doing wrong, I only have about 400ml tops ?  lol.

[K.H]

I haven't got any, i feel left out ,do you give lessons?

[Head Womble]

Keith, Steve.
You're doing it wrong, try two stage non titration with NaOH, WBD, followed by bubble and settle.

Then you'll be able to join the HMPE club.

[Julian]

Keith, Steve.
You're doing it wrong, try two stage non titration with NaOH, WBD, followed by bubble and settle.

Then you'll be able to join the HMPE club.

I Know tosser doesn't, but do you WBD Steve?

[Head Womble]

The biggest producer of HMPE's is when you combine two stage non titration with WBD.

I stopped doing WBD for this reason alone.

[K.H]

Keith, Steve.
You're doing it wrong, try two stage non titration with NaOH, WBD, followed by bubble and settle.

Then you'll be able to join the HMPE club.

I Know tosser doesn't, but do you WBD Steve?

Mr Soap Rich Bio Poor is grumpy tonight
Nige gave up WBD for the same reasons I believe

[Head Womble]

Mr Soap Rich Bio Poor is grumpy tonight

Nice one kieth.

[Julian]

Mr Soap Rich Bio Poor is grumpy tonight

He, he

[1958steveflying]

Keith, Steve.
You're doing it wrong, try two stage non titration with NaOH, WBD, followed by bubble and settle.

Then you'll be able to join the HMPE club.

I Know tosser doesn't, but do you WBD Steve?

No I was using the meth laden Glyc for pre treating my oil way before WBD came in and found the benefits of that far outweighed those of getting the Meth back from the Glyc.

I also think WBD Bio could do with EN testing ! I fear weird chemical changes may be going on.

[Julian]

Right from the introduction of WBD there "appears" to be connection between WBD and increased HMPEs, but I don't think any one has done any meaningful tests to prove the point.

If anyone wants to prepair samples I'll happly run some chilling tests on them.

[1958steveflying]

 Luckily with the ambient temperature staying low Fuging my bio is taking most if not all of them out, I have a sample in a jar sat outside in the snow and it is still crystal clear.

[Tony]

Right from the introduction of WBD there "appears" to be connection between WBD and increased HMPEs, but I don't think any one has done any meaningful tests to prove the point.

I'd agree that there appears to be some connection, there was some speculation that maintaining high temperatures for prolonged periods (as part of Demething) caused it but I'm not sure.  Certainly I did a batch without WBD a long time ago during winter and got comparable HMPEs.  But that was just a single test.

I think I'll drywash my HMPE reprocess batch tonight, fingers crossed that the sample represents what's in the drum and there will be very little HMPEs left.  If so, happy days - I'll be keeping all future HMPEs for reprocessing

[Tony]

Delighted to report that the settled batch was even better than the sample!  Only a light dusting of HMPEs at the bottom - the rest is all super usable biodiesel, despite having cycled through colder weather than the original HMPEs had - happy days!