First attempt at Bho

[outerstar]

Howdy all, I have to say thanks first as reading people posts has gotten me where I am. With the butane element its not for everyone, but I subscribe to hexane lifestyle as everything is made from it now.

I started with 3/4 ounce of crappy Vermont home grown (people think just because its legal they can grow it).
Packed it moderately with wooden rod into 16 inch blasting tube, may have had blow out. Froze everything sealed and blasted in below 20 deg outside. Had a thin film on my pyrex dish and left it over night then scraped next day. Been trying to make a muffin but not a lot of bubbles, around 85 deg.

My next step is to raise temp to 110 deg and vacuum for 4 hours for my final purge. I dont want to off gas terps really and if Im at 400ppm Butane Id be happy. Not enough yield but I want to send it for testing eventually if I get my tech down.

I would say this has been a really fun project and have utilised Butanes strength as a solvent with this crappy weed.

 

[Fadedawg]

Rolling it thin and running it at 110/115F under 10,000 microns/-29.5" vacuum for 4 hours should get below 400 ppm.

 

[outerstar]

I definitely see the advantage of adding alcohol to it at this point.
Mercene boils off at 120 deg f I think, as long as I keep it from going over 115 deg f I should be ok.
-29.5" is almost pure vacuum kinda hard for a 1 stage pump to pull, maybe why people go for 48 hours, that just seems excessive.

 

[Fadedawg]

I definitely see the advantage of adding alcohol to it at this point.
Mercene boils off at 120 deg f I think, as long as I keep it from going over 115 deg f I should be ok.
-29.5" is almost pure vacuum kinda hard for a 1 stage pump to pull, maybe why people go for 48 hours, that just seems excessive.

Why are you adding alcohol?

Myrcene boils around 168C.

Depending on the pump. My single stage pump pulls to 100 micron.

 

[outerstar]

Some one suggested to add a very small percentage of ethanal to remove butane. Goes into solution lowers viscosity boils off at 170 ish adds volume then removes some butane but leaves some ethanol. Rso is another day.

Oh my bad wow I thought the whole reason to not go about 115 deg was for terp loss and not to liquify product. Vacuum just vaporizes terps if you go too long then?

One hundred microns equal one MM, humm. Ill just go with inches of Hg, -25" Hg. Ill just use more time then. I wish there was more impercal means of testing for presents of butane. Its still bubbling in vacuum, once it stops then a good 4 hours at -28" Hg? Maybe 6 hours at -25" Hg.

 

[outerstar]

More purging needed but its looking good.

 

[outerstar]

Purged yesterday for 10 hours at -27 Hg between 100-110f, turned off heat and let sit overnight with vacuum.
Tried a bit this morning, a little petro taste so put back on heat with -27Hg for 4 hours.
Worried now small bubbles are terps so just calling it done.

 

[outerstar]

Final product, excluding winterization I wonder what folks think about these results. Believe these are air bubbles as I folded final product together.

 

[Fadedawg]

Some one suggested to add a very small percentage of ethanal to remove butane. Goes into solution lowers viscosity boils off at 170 ish adds volume then removes some butane but leaves some ethanol. Rso is another day.

Oh my bad wow I thought the whole reason to not go about 115 deg was for terp loss and not to liquify product. Vacuum just vaporizes terps if you go too long then?

One hundred microns equal one MM, humm. Ill just go with inches of Hg, -25" Hg. Ill just use more time then. I wish there was more impercal means of testing for presents of butane. Its still bubbling in vacuum, once it stops then a good 4 hours at -28" Hg? Maybe 6 hours at -25" Hg.

Subsequently removing the alcohol will remove more terpenes than removing the butane, but does work. Butane and Propane are listed as GRAS by the FDA, as is Ethanol, which limits residual of either to 5000 ppm. We get below 10% of FDA residual limits of LPG in about four hours at 115F and -29.5" Hg.

Liquifying the mixture makes it easier for the bubbles to form and escape, and 115F minimizes decarboxylation, as well as terpene loss.

If you are only reaching -28", it will take longer at temperature, so suggest you find out why. I suggest starting with a calibrated gauge, and after changing the oil, hook the pump directly to the gauge and nothing else, just dead headed. What does it read under those conditions?

If it still reads -28" as opposed to reading right at -30" Hg (-29.92) on that gauge, I suggest replacing your pump. Single stage pumps able to pump to 100 microns, and double stage pumps below that, are readily available at reasonable prices. That 1.5" Hg difference is significant in that the effects are non-linear.

 

[Fadedawg]

Final product, excluding winterization I wonder what folks think about these results. Believe these are air bubbles as I folded final product together.
View attachment 4267382

Color and clarity look good.

How are the texture, aroma, taste, and effects?

Winterization is typically done before purging, so suggest this should be the final product this time. Winterizing at this point will further reduce the terpenes.

 

[outerstar]

Cool thanks for the info. Im thinking the -28 is the gauge (Ill get new one, pump is new). Also I was more at 106 to 110 deg f. I know for this to work there needs to be consistent so these two I need to work on. Giving more time purging may have compensated. I only ended up with 1.3 grams.

Its weird its like super thick but at the edges it shatters and brakes off. Very little taste or aroma (a lot like this ethanol hash oil I have from CO). I figured this was because I didnt winterize. Its stoney as hell, one very small dab will kick my ass, nice little white puff when it hits the nail.

Im a runner and I wanted to cut down on my herb consumption. This is an experiment Im really liking the ease of this solvent. Gotta get better product, try again and send for testing.

 

[Renfro]

...If you are only reaching -28", it will take longer at temperature, so suggest you find out why.

Wouldnt altitude have an effect on this number? I'm at 5000 feet and barely hit -25"

 

[Fadedawg]

Wouldnt altitude have an effect on this number? I'm at 5000 feet and barely hit -25"

A pressure at altitude table is attached and at 5000 feet there is only 24.9" Hg atmospheric pressure, so that is what a calibrated gauge will read.

Consider however what your concentrate sees. At 5000 feet it is already under a partial vacuum of 5.02", so all the pump does is remove the rest, and you are in fact under -29.92" Hg vacuum when your gauge reads -24.9.

If your calibrated gauge shows your pump is achieving -25"Hg at 5000 feet, your pump is ostensibly working fine.

 

[outerstar]

Baking was different in Colorado, makes sense though if you think about it. The chart Fadedawg just gave I looked at before I started (different one but the same). Vermont is 800 feet, funny how most of the country just assumes its at approximately that hight. People in Colorado are higher.

Yea I dont have a liquid filled gauge since gasses compress Im figuring its that.

I just took another sample (quality control people), and It does taste like herb, subtle but clean.
Indica, the kind when after taken a hit you stand there for a minute wondering what the hell is going on until you figured out your just really stoned.