Author Topic: Winter HMPE meltdown (Read 12169 times)

Tony · « **on:** May 17, 2012, 10:33:51 PM »

Since it's summer I figured it was time to try and use the 60l of HMPEs I'd stored from winter.

They're all in a 120l barrel so I made a brew of bio and dumped in 40l at 90C and stirred the resulting mix (which must be about the 40C mark). Anyway, all the HMPEs have melted, so I'm bubbling and will see what happens. Hopefully I'll only be left with a smaller layer of stubborn HMPEs at the bottom. Fingers crossed!

Currently sipping some red Methanol antidote since I probably breathed a fair bit.

Julian · « **Reply #1 on:** May 17, 2012, 11:37:23 PM »

I've just received a set of samples from Nige to test in the souped down freezer, along with three set of samples I've accumulated.

If you think it will reveal anything I'm happy to include some of yours too.

Tony · « **Reply #2 on:** May 17, 2012, 11:38:47 PM »

Do you remember the HMPEs I brought to the BBB last year?

It was blazing hot and they were in a small plastic bottle looking like solidified honey!

Julian · « **Reply #3 on:** May 17, 2012, 11:40:22 PM »

No, don't think I saw them.

Tony · « **Reply #4 on:** May 18, 2012, 09:21:42 PM »

Ice cream anyone?

The liquid is quite thick now its cooled, I think they're reforming.

Tony · « **Reply #5 on:** October 29, 2012, 11:30:42 AM »

I forgot to update this, the HMPEs did indeed reform. I wonder if I should've taken it up hotter (over 60C).

At any rate I'm getting HMPE formation in new batches back again now it's cooler, really very annoying!

Presumably the melt point is affected by hydrogenation of the fatty acid?

Carrington · « **Reply #6 on:** October 29, 2012, 12:18:23 PM »

Hi tony
How are you finishing your fuel is it water wash or de-meth settle
I have a bit of a idea but can't find the time to work on them can you message me with a contact number for a quick chat.

Paul

Tony · « **Reply #7 on:** October 29, 2012, 01:22:55 PM »

Spoke to Paul and now have a few things to experiment with - cheers chap!

Julian · « **Reply #8 on:** October 29, 2012, 05:36:07 PM »

Any chance of sharing pre experimentation?

Carrington · « **Reply #9 on:** October 29, 2012, 07:00:15 PM »

Hi Julian
Drop me a message with a contact number so we can have a quick chat about some more trials before I go and put loads on the forum

Cheers

Paul

Glycer-rides · « **Reply #10 on:** October 29, 2012, 07:48:20 PM »

I'm getting them on the last batch.
First time in 3+ years of demeth & settle.

I've never demethed over 75C until this batch, which I ran at 90C. This, of course, has been oft speculated before.

Julian · « **Reply #11 on:** October 29, 2012, 08:44:51 PM »

Quote from: sedir-recylg on October 29, 2012, 07:48:20 PM

I've never demethed over 75C until this batch, which I ran at 90C. This, of course, has been oft speculated before.

I've got no proof or logic as to why, but I'm sure high de-meth temperatures encourage the formation of HMPE's.

julesandtash · « **Reply #12 on:** October 30, 2012, 06:16:40 AM »

It is going to be interesting to see if anyone who has adopted the titrated in-processor water wash process gets any problems with HMPEs.

I strongly suspect we wont (I certainly hope not)

Carrington · « **Reply #13 on:** October 30, 2012, 07:06:34 AM »

Quote from: julesandtash on October 30, 2012, 06:16:40 AM

It is going to be interesting to see if anyone who has adopted the titrated in-processor water wash process gets any problems with HMPEs.

I strongly suspect we wont (I certainly hope not)

If my theory is correct then I think that they are a thing of the past for you ( let's hope I'm right )

Paul

Julian · « **Reply #14 on:** October 30, 2012, 07:40:10 AM »

Sounds like I need to buy another temperature controller to run chilling tests in the spare freezer again.

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Winter HMPE meltdown