
Trichlorofluoromethane - Wikipedia
Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon (CFC). It is a colorless, faintly ethereal, and sweetish-smelling liquid that boils around room temperature. [5] CFC-11 is a Class 1 ozone-depleting substance which …
The story behind unexpected emissions of CFC-11
2021年12月2日 · What is CFC-11? CFC-11 was a widely produced man-made chemical with a variety of applications – predominantly as an aerosol propellant, in the production of insulating foams, as a solvent and as a refrigerant for air conditioners. Other applications included asthma inhalers and tobacco processing.
Fully halogenated chlorofluorocarbons (e.g., CFC-11, CFC-12, CFC-113) are usually characterised by high vapour pressure and density and low viscosity, surface tension, refractive index, and solubility in water (EHC 1990).
CFC(含氯氟烃)为什么要起像CFC-11这样的名字? - 知乎
C2Cl3F3 叫做 CFC-113; 已知数字要写化学式的情况下,先将数字a b c +90,得到一个三位数 d, e 和 f,d 是碳原子数量,e 是氢原子数量,f 是氟原子数量;则:2d + 2 - e - f = 氯原子数量. 所以对于CFC-11,def = 90 + 11 = 101, 碳原子数量 =1,氢原子数量 =0,氟原子数量 =1,氯 ...
Emissions of a banned ozone-depleting gas are back on the decline
The new results show that from 2018 to 2019, emissions of CFC-11 decreased globally by 18,000 tonnes per year (or about 20,000 U.S. tons) to 52,000 tonnes per year (57,000 U.S. tons), a decline of 26 percent. Current annual emissions now appear to have returned to pre-2012 levels.
A decline in global CFC-11 emissions during 2018−2019 | Nature
2021年2月10日 · We find that global CFC-11 emissions decreased by 18 ± 6 gigagrams per year (26 ± 9 per cent; one standard deviation) from 2018 to 2019, to a 2019 value (52 ± 10 gigagrams per year) that is...
A decline in emissions of CFC-11 and related chemicals from …
2021年2月10日 · Emissions of ozone-depleting substances, including trichlorofluoromethane (CFC-11), have decreased since the mid-1980s in response to the Montreal Protocol 1, 2. In recent years, an unexpected...
臭氧層危機:科學家發現中國東部三氯氟甲烷排放不降反升 - BBC News 中文
2019年5月23日 · 三氯氟甲烷(CFC-11)的英文全名是trichlorofluoromethane,也被稱作氟利昂-11,是氯氟烴(Chlorofluorocarbon,簡稱CFC)的一種,氯氟烴最早的產品是1930年代出現的氟利昂,被普遍用來做制冷劑。 但科學家後來發現,氯氟烴在大氣層分解的時候,會釋放氯分子,破 …
一氟三氯甲烷 - 维基百科,自由的百科全书
一氟三氯甲烷,又称 氟利昂 -11,分子式CFCl 3。 一氟三氯甲烷在低于23.7°C时为液体,呈无色,易挥发,微有 醚 的臭味。 不可燃,但在高温下可分解产生有害物质。 几乎不溶于水,溶于 乙醇 、 乙醚 和其他有机溶剂中。 毒性比 二氧化碳 和 氯代烃 低,但有报道其浓度在10%以上时,可引起兴奋、痉挛,并最后陷入麻醉状态。 由 四氯化碳 和 氢氟酸 在 五氯化锑 催化下进行反应再经分馏而得。 用作 制冷剂 、气雾剂、灭火剂、干洗剂和 发泡剂 等。 对 臭氧层 有损耗作用,對 …
一氟三氯甲烷(CFC-11) - ChemicalBook
ChemicalBook 为您提供一氟三氯甲烷(CFC-11)的化学性质,熔点,沸点,密度,分子式,分子量,物理性质,毒性,结构式,海关编码等信息,同时您还可以浏览一氟三氯甲烷(CFC-11)产品的价格,供应商,贸易商,生产企业和生产厂家,最后一氟三氯甲烷(CFC-11)的中文 ...