Compressed gas cylinder instrument and precautions

In organic chemistry experiments, compressed gas cylinders sometimes use gases as reactants For example, hydrogen and oxygen will also be used as protective gas, such as nitrogen and argon Some gases will be used as fuel, such as gas and liquefied gas All these gases need to be packed in special containers It's usually a compressed gas cylinder The gas is stored in the cylinder at a higher pressure, which is convenient for transportation and can be used for very pure gas at any time in the general laboratory Due to the high pressure compressed gas contained in the cylinder, it is necessary to pay strict attention to safety when using, otherwise it will be very dangerous The pressure of compressed gas commonly used in organic chemistry laboratory is close to 200 atmospheric pressure The whole cylinder body is very solid, and Zui is easy to be damaged It should be the exhaust valve installed at the cylinder outlet Once the exhaust valve is damaged, the consequences are unimaginable Therefore, for the sake of safety, a cover should be installed on the exhaust valve In addition, these compressed gas cylinders shall be kept away from fire sources and corrosive substances, such as acid, alkali, etc The compressed gas cylinder used in the laboratory is generally about 160cm in height and about 70-80kg in gross weight For such a huge object, if it is not fixed, once it falls down, it will certainly smash things or hurt people, not to mention the danger of high-pressure gas itself Therefore, for safety reasons, the cylinder should be fixed in a certain place, such as at the table or at the corner of the wall (as shown in Fig 2.15) In order to facilitate the transfer, the special cart is generally selected (as shown in Fig 2.16) How to correctly identify the type of gas in the cylinder is also a very important thing Although all gas cylinders are labeled to indicate the type and purity of the gas contained in the cylinder, these labels are often damaged or rotted For the sake of safety, all compressed gas cylinders will be painted in different colors according to certain standards according to the gas they contain.