Sometimes there is a need to quickly cool drinks, meat, vegetables, fish or other products, but there is no access to the refrigerator. Dry ice is ideal for this. Dry Ice is a necessary thing in the household, only to purchase it is problematic. No need to look for in stores and supermarkets, because you can make dry ice yourself!
How to make dry ice
The method is simple, only the problem is always the same, because you need the main ingredient, and it is very difficult to “get” it. The main ingredient for the manufacture of dry ice is carbon dioxide, it is carbon dioxide, which is located in fire extinguishers. Look for this substance with the labeling "OU".
In addition, you need to prepare the following materials:
- scotch;
- glasses to protect the eyes;
- linen bag;
- gloves or thick mittens to protect the skin of the hands;
- the container for the preparation and storage of dry ice with thermal insulation protection.
Production of dry ice:
- In industrial conditions and in home, the technological process is no different, except in quantity. And the principle of preparation is very simple: the liquid that is in the cylinder is under pressure, it expands due to the fact that it passes from the liquid state to the gaseous state. It turns out that the temperature of this substance is very reduced.
- Well, actually in detail about the manufacture of dry ice: you need to take a spray can with a fire extinguisher, remove protection (seal, check).
- You need to quickly put on a bag on an unprotected bell so that it tightly tightens and there is no free space and also quickly wrap the hole with tape.
- Now, holding the bag with one hand, the second smoothly press on the lever to release a little gas.
- The lever needs to be released, remove the bag and immediately shift what formed in it, into a container.
- This is dry ice. If not enough, repeat your actions again.
- After the right amount of dry ice has been done, the fire extinguisher must be closed and put in the same place.
About precautions with dry ice
It seems that everything is so simple - I pressed the lever and now there is already a little dry ice in the bag. But in reality, everything can be different. The fact is that the formation of dry ice is due to a sharp drop in temperature. And this is fraught with frostbite. To prevent this from happening, you need to work in mittens and glasses. The face can also be protected just in case with a mask of dense fabric, and put on a protective cap on your head.
If you get a lot of dry ice, this can lead to unpleasant consequences: a deterioration in well -being, dizziness, headache, increased pressure, weakness. To prevent this from happening, it is necessary to work in a well -ventilated room.
The skills of handling a fire extinguisher are also very necessary and important. On the handle you need to press smoothly to release a small stream of gas. The fire extinguisher must be kept tight. Just in case, stock up on two fire extinguishers, if suddenly a fire occurs due to careless actions, then the second fire extinguisher will come in handy in order to put out the fire.
On the storage and use of dry ice
Ready ice, just received, must be stored in a tightly closed container with thermal insulation. If you haven’t come up with anything suitable, prepare a cardboard box in advance, put the bars of foam tightly in each other - in this container the ice will last for a while. As for storage in the freezer, in order to maintain dry ice in its original form, it is necessary that the temperature in the chamber is minus 80 degrees! It turns out that you cannot count on long -term storage of dry ice at home.
In no case should you store dry ice in a tightly closed vessel. For example, in glass containers, because this substance tends to expand, which can lead to an explosion.
Application of dry ice:
- for cooling products and drinks (during transportation);
- from dry ice, you can cook carbonated water: you need to put a couple of pieces of ice in a glass with ordinary water, and if you put ice in a glass with juice, then you get lemonade;
- with the help of dry ice, mosquitoes are scared away;
- they also make special effects at discos (let smoke) and cool computer equipment.
Now you know how to make dry ice yourself. Be careful!
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