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Jumat, 27 Mei 2011

Minyak Bumi

A.  Pengertian minyak bumi
Minyak bumi (bahasa Inggrispetroleum, dari bahasa Latin petrus – karang dan oleum – minyak), dijuluki juga sebagai emas hitam, adalah cairan kental, coklat gelap, atau kehijauan yang mudah terbakar, yang berada di lapisan atas dari beberapa area di kerak Bumi. Minyak bumi terdiri dari campuran kompleks dari berbagai hidrokarbon, sebagian besar seri alkana, tetapi bervariasi dalam penampilan, komposisi, dan kemurniannya.

B.  Komposisi Minyak bumi
Komposisi minyak bumi dikelompokkan ke dalam empat kelompok, yaitu:
Hidrokarbon Jenuh (alkana)
§   Dikenal dengan alkana atau parafin
§   Keberadaan rantai lurus sebagai komponen utama (terbanyak), sedangkan rantai bercabang lebih sedikit
§   Senyawa penyusun diantaranya:
1.    Metana CH4
2.    etana CH3 CH3
3.    propana CH3 CH2 CH3
4.    butana CH3 (CH2)2 CH3
5.    n-heptana CH3 (CH2)5 CH3
6.    iso oktana CH3 – C(CH3)2 CH2 CH (CH3)2
 

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