I'm working on an MSDS sheet for raw glycerin and I'm looking for some help to finish it off. Does anyone have or can get the flashpoint of raw and demethed glycerin. Actual numbers not guesses please.
I do have some flashpoint information somewhere for a couple of glycerin samples we had tested but I will have to have a dig around in the archives at the office next week and see if I can find them because we basically binned the information as being unreliable due to the inconsistencies in the results. The problem is it is all going to depend upon exactly what feedstock quality, which process, how good the phase separation and then how complete demething is done amongst other things.
How many people get the phase separation exactly right, if they drop out out an extra couple of litres of biodiesel with their glycerin when separating it is going to lower the flash point compared to 100% glycerin.
How many people actually "demeth" completely i.e. remove 100% of the available methanol, if they don't then the flash point will be lower.
What about the amount of water, catalyst, soap, mono glycerides, di glycerides, mong etc. it all has an effect on the "raw glycerin" sample results.
IMO an MSDS for "raw glycerin" is likely to be an almost impossible task for you and in actual fact would only be suitable for the fluid sample you send for test to get the results. Otherwise you are going to have to include such a large range for all parameters that it could cover a multitude of products not only "raw glycerin" as to make its usefulness limited.
The last thing you want to do is take the liability and write an MSDS that someone relies on for toxicology, fire fighting, exposure or other health effects.
I see your point about the variations. MSDS are allowed to offer a range. I've seen one where the active ingredient was a range of 30% to 90% as in one msds covered multiple variations of a single product. Have you ever looked closely at the MSDS for 0.01M NaOH? other than the composition section it looks identical to 50% NaOH solution. 0.01M NaOH is so weak as to not be hazardous at all.
I was thinking of using the msds for premix as the basis for it. As to liability, It would have a clear disclaimer total lack of "manufactures information" or contact information.
I was talking to a University of Tenn professor and some of his students about this very thing thursday. They are workng on uses for glycerol before it is cleaned up to tech grade glycerine, they are doing some interesting work.
They collect glycerol samples from several different bio facilities, and as Fuzznu has said samples vary greatly from different facilities. He did say that UVO facilities have the crudest glycerol and has the most "Trace" contaminates, normally.
I dont have the results from my sample here, but I will have to say there was alot less "glycerine" in the glycerol that I would have thought. Seems like methanol content was 6%, but I can verify later.
Sorry if I was slightly off topic.
Rick, unless you have gotten these numbers already I can get a closed cup flash test done at the local college here. Let me know,
Without intentionally whizzing in the Corn Flakes (but doing it anyways), it is impossible to draw up an MSDS that encompasses ALL biodiesel glycerol. You can however put one together that covers YOUR glycerol, the one you have complete control over, but that is about as far as that is going to go, due to the vast amount of variables at play.
Someone actually did put one together and IIRC Graydon posted it a while back, and I basically answered the same thing then too. Great, if you can draw up an MSDS for a customer that wants to buy up all your glyc that has been produced from one single large batch (the params will or can differ form batch to batch), but from there to making any sort of statement to the effect that this MSDS is universal in scope just isn't happening.
** Biodiesel Glycerine Soap - The Guide
- on 5 continents helping people make & sell soap from the Biodiesel Glycerine.
I would have tried to do my glycerine flash test as generic as possible for that reason. 20% methanol for rxn. Use that glycerine for methylated stuff. Then boil the guts out of the same sample and use that as the de-methed
An MSDS sheet is not required to list exact figures. Based on that fact I don't think it would be all that difficult to make a generic one, unless I am missing something? (very possible!)
Simple schematic for a pump and heater control with a high limit
Sensor for the biodiesel/glycerin layer
Don't worry about it Reece. I'll make a best guess. It will be close enough.
|Powered by Social Strata|