I was recently given some home canned fresh pork, that was preserved by boiling at 100C for three hours. It is only a few weeks old and tastes delicious, but after reading up on canning processes, I believe the above process is not safe.
The canned pork, along with the new confrontation the US seems to be provoking with Russia and imminent apocalypse, inspired me to look into canning my own meat.
As far as I can tell, the aim is to get the cold spot internal temperature up to around 120C for a while to kill clostridium spores, and it is not effective to use dry heat, because heat exchange is too slow and the cans don't like it.
The typical method I found online involves a water bath in a large pressurized container, to get the boiling point up.
I don't have a large pressure canner and I would like to do a large quantity of cans. Can i simply use a bath of vegetable oil maintained at around 130C?
As the answer and comments below describe, a pressurized can in a hot oil bath could explode and cause an eruption of hot oil. However, that leads to another avenue of thinking. PET bottles are designed to withstand high internal pressure, and would probably not melt at 120c (I need to check) but PET has high oxygen permeability. There are plastic canning jars such as these https://www.mycosupply.com/cgi-bin/shopper.cgi?preadd=action&key=PLID02 . But there is no data on internal pressure abilities. Is there a common container designed to handle high internal pressure that can be heated to 120C with low gas permeability? (beer bottles come to mind)
It seems beverage cans, especially those designed for in can pasteurization, would work https://hypertextbook.com/facts/2000/SeemaMeraj.shtml but those cans require expensive equipment.
UPDATE 2 So after more research, there is a process called Flame Sterilization, done at atmospheric pressure, and requires a smaller, robust can. However, the process is problematic and little used in industry. The trick would be to source cans intended for flame sterilization and then the oil bath would work. Any clues where from?