Alkyl lead compounds - Arukiru Namari Kagobutsu

Japanese: アルキル鉛化合物 - あるきるなまりかごうぶつ
Alkyl lead compounds - Arukiru Namari Kagobutsu

... refers to compounds added to gasoline to prevent knocking in gasoline engines. Organometallic compounds of lead, iron, manganese, etc. are known to have knocking prevention effects, but the most well-known are alkyl lead compounds such as tetraethyl lead (C 2 H 5 ) 4 Pb, tetramethyl lead (CH 3 ) 4 Pb, and ethylmethyl lead. When small amounts of these are added to gasoline along with auxiliary agents such as ethylene bromide and ethylene chloride, the octane number of the gasoline increases by 5 to 15.

*Some of the terminology that refers to "alkyl lead compounds" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ガソリンエンジンのノッキングを防止するために,ガソリンに添加される化合物をいう。鉛,鉄,マンガンなどの有機金属化合物がノッキング防止作用をもつことが知られているが,最も著名なのは四エチル鉛(C2H5)4Pb,四メチル鉛(CH3)4Pb,エチルメチル鉛などのアルキル鉛化合物である。これらを臭化エチレン,塩化エチレンなどの助剤とともにガソリンに微量添加すると,ガソリンのオクタン価が5~15上昇する。…

※「アルキル鉛化合物」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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