Winter heating, freon is what?

refrigerant is tightening operation of refrigeration medium, circulating in the system. It under the low temperature heat vaporization and condensation at high temperature heat release. Used in the history of ammonia, carbon dioxide, sulphur dioxide and air as refrigerant. In 1930 the United States announced the freon, is full of hydrocarbons the floorboard of the fluorine, chlorine, bromine derivatives, freon is a broad categories, there are dozens of. They are there is a big difference in thermal properties, but their physical and chemical properties and has many advantages. Thus, from 1930 to 1990, freon has been widely used.

1975 experts in the United States, chlorine of freon chlorine atom can damage the ozone layer. The ozone layer in the 25 - from the ground 40 in the stratosphere. It can shield the earth biological harmful ultraviolet light. There are all kinds of wavelength solar radiation of ultraviolet ray, the wavelength of 0. 28 - 0. Ultraviolet rays can damage the life under 32 microns. The ozone layer can block the harmful uv rays, protect humans and creatures on the earth. Freon chlorine atom can damage the ozone layer in the theory in the ninety s widely, under this theory got the Nobel Prize in chemistry in 1995. According to the theory of chlorine of freon chlorine atoms in the stratosphere, and the effect of ozone molecules generated oxide chlorine and oxygen molecules. Chlorine oxide with ozone effect, heavy and generate chlorine atoms and oxygen molecules. So repeated, ozone makes a lot of damage.

discussion shows that every 1% reduction in the ozone ozone is harmful radiation add 2%. The consequences are skin cancer and eye diseases to add, the body's immune system function decline, the Marine food chain is damaged, the affected (some plants to grow Including agricultural production) 。 Someone proposed that when the remaining 1/5 of ozone layer, is the critical point of life on earth. Freon

freon

a few kinds of fluorine of chlorinated methane, and the floorboard of the fluorine chlorine generation of ethane. Contains CCl3F ( F - 11) 、CCl2F2( F - 12) 、 CClF3( F - 13) 、 CHCl2F ( F - 21) 、CHClF2( F - 22) FCl2C - CClF2( F - 113). F2ClC - CClF2( F - 114). 。 Above the freon is a colorless gas at room temperature or volatile liquid, a slight fragrance, low toxicity, chemical properties. One of the most primary is dichlorodifluoromethane CCl2F2 ( F - 12) 。 Dichlorodifluoromethane under atmospheric pressure is colorless gas; Melting point - - 158 ℃, boiling point 29. 8 ℃, density 1. 486 g/cm ( - 30℃) ; Slightly soluble in water, soluble in ethanol, ethyl ether; Do not reaction with acid, alkali. Dichlorodifluoromethane can be made of carbon tetrachloride and anhydrous hydrogen fluoride was prepared in the presence of catalyst reaction, reaction product first is dichlorodifluoromethane, as well as CCl3F and CClF3, will CCl2F2 separated by fractionation.

first used as a refrigerant freon. Their commercial code F showed that fluorine generation of hydrocarbon, the first number is equal to the number of carbon atoms minus 1 ( If it is zero will eliminate) , the second number is equal to the number of hydrogen atoms plus one, the third number is equal to the number of fluorine, chlorine atom number column. As the freon may damage the atmospheric ozone layer, have been used constraints.

this release of the refrigerant, freon manufacturers, for details, please click on the query.

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