Gas canister with liquid inside, but still empty?

Got a few used empty canisters. One i can clearly feal theres liquid inside, but no pressure.
After holding it in my hand a minute, I could get 5 sec burning - that was all.

Its a Coleman C300 / 240g (roughly 1/2 pound type "melange"), propane/butane mix.
How is it possible it will not burn?

Do they fill some other "cheating liquid" inside?
Can propane/butane exist in liquid form without evaporate and make pressure?

I tested inside in room temp.

Found a very similar looking canister on the web - the right one.
https://res.cloudinary.com/dcskb3gb...uto/v1600855982/media/uploads/coleman_500.jpg


Thanks.

 

That's weird. Perhaps it is clogged?

 

If used in too cold of temps, the propane will burn off and leave butane. Can dunk remainder in hot water or heat up briefly.
Duane

 

Duane,

Though butane may freeze in the cold, it won't stay frozen after being brought up to room temperature. Butane boils at -0.5C. Room temperature is 15-25C.

 

Canisters have been used, likely in sub freezing temps when only the propane evaporates and burns off, leaving butane behind. Butane doesn’t freeze, just won’t evaporate below 32F/0C.
Duane

 

I can’t recall if propane was also needed to help with pressure. I’ve had one Coleman Powermax canister needed additional heat to finish burning off fuel. You would think room temperature would work.
Duane

 

Propane boils at -42C. If you are outside in that kind of weather, well, good on you I guess.

 

Even if its just butane left and it wont work inside I expect a cool reception if I visit

 

Thanks for explanations. Even if butane is left, and canister in room temp, it will still evaporate and burn till empty...? (I have never seen a sigarette-lighter with liquid butane that will not work)

What about the stinking-stuff they add so propane cant leak without smelling rotten cabbage? Is it possible they added too much stink liquid?

 

When the evapurate, it needs energy. So when you open it, the temperature insde the canister will go down. With just a little in the canister, the temperature will go down fast. So just some seconds after you warmed it in your hands sounds, sounds perfectly normal for a near empty canister, its just how the physics works.

If you put the canister into temperated water, it will not cool down so fast.

 

Amount of odorant that is used to make gas smell is extremely small (just few ppm), so it is quite unlikely that there is much odorant that it would be in liquid form.

 

Try flipping the canister upside down and pressing down the valve core with a chopstick. Do this outdoors, away from sources of ignition, use common sense and all. If fuel sprays out, try it on a stove again. I suspect it is just clogged.

 

Plain butane may be filled differently than the isobutane mix, cannot recall if the propane is what makes the pressure in a canister with residual pressure sufficient to push leftover butane out. Us who have actual experience with isobutane can experience the lack of pressure after the propane has burned off in below freezing temperatures then try to get a flame when a stove is used in warmer temps and the canister requires added heat to make pressure to push out the remaining fuel. My Coleman Powermax canisters get that way.
Duane

 

I dont think a chopstick will fit inside the 7/16 Lindal fitting on the canister (the hole is 2,5 mm).
(If that was what you meant).

I am waiting some filling-adaptor stuff in the mail and maybe I will fill just some butane into the "strange" canister...

I recently got some other filling-adaptors that fits M14.5mm thread on Sievert/Primus tanks, but dont think I will fill/test propane on these lightweight butane/propane canisters.
(even they are meant for some propane in the mix).

Luckily I ordered 2 pcs of the adaptor, and it hit me I now can fill my bigger blue (Sievert/Primus) propane tank to smaller tank, by connecting the adaptors together with the Lindal-adaptor.
Heres a few photos:

 

Use any thin, dull object, then. Perhaps the dull end of a toothpick.

 

Im not sure if it's a good idea to put propane in a butane canister - propane tanks are at a much higher pressure. However, I must add that I don't have any experience with this, and it may be ok.

 

There have been some canisters with slightly "off standard" dimension in the 7/16" Lindal valve - in some cases bad thread but more often a need to tighten down quite hard with a wrench before the valve opens fully - in this case it use to open slightly when warm and close when it cooles down by the streaming gas if it is tightened normal.

 

I discovered some airduster canisters with Lindal 7/16 valve today.
It says EXTREMELY FLAMMABLE, so I just had to try with the burner.
Bad news - it did not burn...at all. Flammable???

 

Put the dusting nozzle back on and point it at a candle. Perhaps the stove is unhappy

 

I had no problem getting gas out of the burner, but it would not burn...