Biopowered - vegetable oil and biodiesel forum

Biodiesel => Chemistry and process => Topic started by: Tony on November 07, 2014, 01:14:41 AM

Title: 3/27 clear pass at -10C
Post by: Tony on November 07, 2014, 01:14:41 AM

Just for interest, this was a sparkling clear pass at 10C, taken down to -10C

(http://www.biopowered.co.uk/w/images/0/09/3_27_-10c.jpg)

As you can see there are floating flakes which settle to the bottom.  Easily distinguished from oil fallout because they float up and move easily with the liquid.

So this whole 3/27 pass at 20C thing that people go on about I'm not convinced by.  Even with palm oil it should be easy to see the difference between oil and waxing.

Title: Re: 3/27 clear pass at -10C
Post by: Julian on November 07, 2014, 11:27:20 AM

I don't bother too much about temperature and often get passes at below 20°C.

I had similar flakes a couple of batches ago, just a tiny amount, but noticeable, and as you say defiantly not oil.  I've no idea what they were but I don't think it was wax given the ambient at the time.

Title: Re: 3/27 clear pass at -10C
Post by: Chug on November 07, 2014, 09:15:34 PM

Nice one Tony, good experiment, I've never tested below fridge temps but in tests I did good bio will pass clear n bright at pretty much any test temp and any temp difference between meth n bio.

Reminds me I must get another driveway sample bottle now its starting to get a little colder, I caught the last one with the lawnmower as it had got lost in the grass.