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"I always have 15-20kg of dry ice when I extract with isopropyl as an option." BTW The alcohol is to mix with the dry ice to create a chemical bath to cool the vessel that you wish to make low pressure as gas below the boiling point is liquid ergo no pressure, conversely hot water bath will boil...

Do you dry and grind your bud, then tightly pack? More efficient to grind and stuff (more backpressure) and try to avoid soaking as more time more wax. Think of your column as a simple machine where weight of solvent, density of sample matrix, flow rate and volume affect efficiency. Hard to...

My first build was very similar. You will need just under one imperial gallon of butane (approx. 5 lb.) per pound of sample matrix. Solvent will flow from high pressure (hot water bath) to low pressure that you create by chemical bath ( dry ice + ethanol/ isopropyl alcohol @ 99.9%) in metal 5...

BHO needs proper temperature control of solvent and sample matrix as well as filtration. I start with the sample matrix in a 150 micron filter-sock then chilled to -70C which then passes through a wad of stainless steel scrub-pad then 20 micron mesh then paper 20 micron, 10micron mesh 5 micron...

Yup looks like a filtration issue. What are you using right now?

Blast into the metal container and finish in the metal container. Use only water as a heat source until most of the degassing is complete, then use a hot-plate to finish as you may have to get the oil to around 145C max then let it cool a bit and repeat until no bubbles. To avoid condensation...

Purge requires heat, vacuum or both. If using only heat then water would be your safest heat source. this is why you blast into a metal container, the conductivity of the metal plus the btu's from the water does the initial degassing without threat of fire or explosion. Coffee filters are 25...

The alcohol reduces the surface tension of the oil allowing easier degassing and any clean up efforts. When making oil and the need to "polish" or apply some color remediation arises then dilute with alcohol and run through a Buchner filter before boiling off the alcohol.

Any amount of alcohol will be boiled off so it is a matter of experimentation, perhaps start with 10% to 15% of the volume of solvent/oil output. I would recommend that you visit a medical equipment vendor and buy a gallon of "surgical alcohol" @ 99.9% to avoid water contamination. Here, in...

I think that it is dimethyl ether, in any case, you have to apply heat via water until 95% purged then apply enough heat using a hotplate to reduce the surface tension of the oil to degas completely.

Heat the tank in a barrel of hot water, recover or use vapor via condensing coil for next blow. Alternatively create head pressure with some nitrogen.

Where to begin? Yes, safety first! Use metal containers {chrome plated aluminum salad bowl ideal and dollar store fare} for collection vessels. Only use water as a heat source until 95% of gas offed, then move to heated vacuum chamber or heat to 145C to complete off gassing in open recovery...

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Cool it, you want to chill/freeze it for some mechanical manipulation. Heat it and use a large syringe to move it into vials etc.,.

BHO is the easiest handling ever if you know what you are doing, otherwise it can get everywhere on everything. Some people can not properly poach an egg, dangerous handling power tools etc..

Truth is that I am quick to pan such things these days. Really, the good old days are long gone. I have McGiver'd my way to a very sophisticated apparatus over the years. I did start from some humble beginnings and my thought was that somebody might have as much fun with it as I had. Sometimes I...

I stand by what I wrote 100 percent. I was suggesting that spending under $15 on kit making five grams of BHO from a pvc tube is like a fart in a wind storm definitely not a tempest in a teapot. Would it make more sense to drop a $100 on some Mickey Mouse commercial kit to make a few g's of BHO...

It was back in the 80's, my first blast was through pvc pipe and it was better than alcohol extraction. A small tube held an ounce and 3 cans of butane. Mostly dissolved hash and keef in dimethyl ether back in the day. I do not know how I managed not to blow myself up.

Think of your tube as a simple machine. This machines efficiency will depend on a number of factors all of which should be carefully controlled and duly recorded and even being as predetermined and exact as possible, the learning is a long "drunken walk". Such factors as pressure, volume and...

How much solvent are you dealing with that you wish to recover? Having only to recover slightly less than one imperial gallon I am using a small Yellow Jacket YJ-LTE 3/8" with fittings and hose. I have never timed the degassing, always too busy doing other tasks. I get turned around for another...