Thomas Midgley, US chemist C021/8827

Thomas Midgley, US chemist

Código da imagem : C021/8827
Dimensões : 3.626 X 4.838 pixels
Orientação : horizontal

Data do upload no fornecedor : 17/09/2014
Tamanho máximo não comprimido : 50,2MB

Pauta:	Thomas Midgley, US chemist
Título:	Thomas Midgley, US chemist
Descrição:	Thomas Midgley (1889-1944), US chemist and inventor. Working for Delco in World War I, Midgley led a team working on 'knocking' in petrol engines. He found that tetra-ethyl lead (when used with 1,2-dibromo-ethane to reduce lead oxide deposits in the engine) is highly effective at reducing knocking when added to petrol. The mixture is still used as an anti-knock additive today. Midgley devised the octane number method of rating petrol quality. In 1930 he introduced Freon 12 as a non-toxic non-flammable agent for domestic refrigerators. Both Freon and his lead-based anti-knock compound have since been shown to harm the environment.
Coleção:	Science Photo Library
Crédito:	CHEMICAL HERITAGE FOUNDATION/SCIENCE PHOTO LIBRARY/ Fotoarena
Disponibilidade:	imediata
Direito de uso:	Direito controlado
Autorização do(a) modelo:	não
Autorização da propriedade:	não

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