Regulations on the storage period of full R22 gas cylinders

Element name: Fluorine. Atomic weight: 19.00. Element type: Non-metal. Discoverer: Moissan. Year of discovery: 1886. Discovery process: In 1886, Moissan in France electrolyzed dried potassium fluoride using a platinum-iridium alloy as electrodes in a platinum U-tube to produce fluorine. Element description: It is a pale yellow gas with a density of 1.69 grams per liter. Its melting point is -219.62°C and its boiling point is -188.14°C. Its valence is -1. Fluorine has the highest electronegativity, with an ionization energy of 17.422 electron volts. It is the most reactive element among non-metals, possessing strong oxidizing properties; it can react with most hydrogen-containing compounds such as water and ammonia, as well as with all chemical substances in liquid, solid, or gaseous states. The reaction with water is complex; primarily hydrogen fluoride and oxygen are produced, along with smaller amounts of hydrogen peroxide, dioxygen difluoride, and ozone. It can also displace other non-metal elements in compounds. It can react violently with all non-metallic and metallic elements to form fluorides and cause combustion. It is highly corrosive and toxic; special care must be taken when handling it, and its liquids or vapors must not come into contact with the skin or eyes. Element source: It can be obtained from an electrolytically melted mixture of potassium fluoride and anhydrous hydrogen fluoride. Uses of the element: Polymers such as fluorinated plastics and fluorinated rubbers, which possess excellent properties, are used in fluorine-oxygen torches and for the production of various fluorides. Elementary supplementary information: It was through repeated analyses by chemists in the early 19th century that the composition of hydrochloric acid was confirmed, and it was established that chlorine is an element; due to its similarities to chlorine, fluorine was quickly identified as an element as well, and it exists in hydrofluoric acid. Although its elemental form was not isolated until the 1880s. Like chlorine, fluorine is also one of the elements widely distributed in nature; among the halogens, its abundance in the Earth’s crust is second only to that of chlorine. As early as the first half of the 16th century, the natural fluorine compound fluorite (CaF2) was described in the writings of European mineralogists; at that time this mineral was used as a flux, added to the ore being melted in order to lower its melting point. Therefore, the Latin name for fluorine, fluorum, comes from fluo (to flow). Its element symbol was thus designated as F. Lavoisier included the hydrofluoric acid group as an element in his 1789 list of chemical elements. By 1810, Davy had established that chlorine was an element; in the same year, the French scientist Ampère, based on the similar properties and compositions of hydrofluoric acid and hydrochloric acid, boldly inferred the existence of a new element in hydrofluoric acid. He also suggested naming this element fluorine, following the naming convention for chlorine. However, elemental fluorine could not be produced for a long time; it was not until June 26, 1886, that it was synthesized by Moissan, a student of the French chemist Freytag. For this, Moissan was awarded the Nobel Prize in Chemistry in 1906; he became the second person to receive this prize for his contributions to the discovery of chemical elements.

In the laboratory, small amounts of fluorine gas are stored in gas collection bottles; to store it for an extended period, the fluorine gas is dissolved in water to form fluorine water, which is then stored in brown reagent bottles. In actual production, fluorine gas is compressed into liquid fluorine and stored in steel cylinders, as dry liquid fluorine and fluorine gas do not react with iron at room temperature. The electrolytically produced fluorine is cooled to 203 K, and HF is absorbed using a sodium fluoride scrubber, after which it is once again filled into special nickel cylinders under high pressure. Steel cylinders containing fluorine must be stored in a separate, well-ventilated concrete warehouse. Chlorine and fluorine, which are classified as toxic gases, require attention not only to their toxicity but also to their oxidizing properties; they should be stored, transported, and used separately from other flammable gases. This post was last edited by tfx511024 on 2009-2-13 10:13.]

No detailed regulations have been found regarding the storage period, but there are clear requirements for the storage environment; see the post above!

The original poster is referring to Freon, not fluorine – it’s a refrigerant

It is generally not allowed to store for more than 3 months

The original poster made it clear that it’s R22, not fluorine