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
Restrição da imagem:	This image may not be used to state or imply the endorsement by the Science History Institute of any product, service or activity, or to concur with an opinion or confirm the accuracy of any text appearing alongside or in logical association with the image.,Editorial use only

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