Gloopy bio when settled?

[db]

I have finished bio stood in 25L containers, typically stood for a week, before pouring into by 'filling station' which filters down to 1 mic.

When pouring the last say 10L it's gloopy to pour sometimes. Is this the start of HMPE's? It still goes in the car!!

Dawson

[Julian]

If you're getting 10 litres of HMPEs from 25 litres, your pretty unlucky, similarly if it's soap.

What was the bio like when it went into the drums?  What sort of over night temperatures is the bio seeing? Did you do any soap or 3/27 tests?

Take a couple of samples of gloop.  Mix one 50/50 with water.  The other heat in a saucepan, and post the results?

[Tony]

Have you tested it for soap? HMPEs are yellow like margarine so I think you'd notice them.

[db]

If you're getting 10 litres of HMPEs from 25 litres, your pretty unlucky, similarly if it's soap.

What was the bio like when it went into the drums?  What sort of over night temperatures is the bio seeing? Did you do any soap or 3/27 tests?

Take a couple of samples of gloop.  Mix one 50/50 with water.  The other heat in a saucepan, and post the results?

The bio looks fine when put in drums, clear 50/50 pass and usually (but sometimes cloudy) 27/3. I will try a sample of gloop. What am I looking for when heating the one in the saucepan?

6-7 degrees overnight.

[Julian]

Those sorts of temperatures could promote HMPEs.

If it's soluble in water, you're looking at soap.  If it's HMPEs it should melt back to clear bio at around 30°C ish.

[db]

Those sorts of temperatures could promote HMPEs.

If it's soluble in water, you're looking at soap.  If it's HMPEs it should melt back to clear bio at around 30°C ish.

I've done a 50/50 and it's fine. Maybe I exaggerated when I said 10L, looks like 5L in this tub. Have a look at the photo, it's not the best. Looks like bubbles on the top in a little gel!!

[Julian]

Anything like this ...





or this ...




What happens when you heat it?

[Tony]

The only time I've seen a clear gel has been too much catalyst + water. But that would fail a soap test. Very odd.

[Chug]

if you filtered to 1 micron then it won't be soap so I guess the colder nights/mornings were getting now is allowing the bio to start thickening.

What is your main feedstock oil?

[db]

Hi Julian, It's not hmpe's as your photo's. The feedstock is KTC rape. The sample photo I've shown is less bubbly on top this morning obviously due to settlement overnight. I'll pull the sample in doors and let it warm up see what happens.

My process is: Glyc wash, 2 stage titrated using Naoh, demeth (bio only) then bubble & settle 1 week, hardwood tower, then filter 1 mic x 2

[Julian]

From the OP this gel is forming before it's filtered to 1µ in your filling station, is that correct?

[Tony]

Soap is smaller than 1u so filtering won't remove it.

[db]

From the OP this gel is forming before it's filtered to 1µ in your filling station, is that correct?

Hi Julian, I filter twice at 1 mic, the gel is after the 1st filter.

I took a jam jar sample in the house for 4 hours - see photo attached. It seems to clear the gel, but looks like cloudy bio?

[Tony]

Looks like HMPEs to me, pop it in the microwave and heat, bet it clears, then slowly reforms as it cools (but with less).

Would explain the soap test pass if it's HMPEs and not soap.

[K.H]

If i hadn't read the rape bit i would say its just gelling because of the cold and contained palm oil