Patrick Dunbar Ritchie FRSE FRSC FPRI LLD (1907–1981) was a 20th-century British chemist of Scots descent.
Apart from being a noted chemist, he was an artist, fine art conservator, philatelist, ornithologist and mountaineer.
He then undertook postgraduate studies at Dundee gaining a PhD in 1932.
[4] In 1964 he became the first chairman of the Department of Pure and Applied Chemistry when the Technical College became the University of Strathclyde.
[3] He retired from Strathclyde in 1972 but then was appointed professor of chemistry at the University of Penang in Malaysia.