Here he formed a partnership with John Hutchinson and developed a method to recover sulphur from the by-products of the Leblanc process, which was used to manufacture soda ash.

[6] Ores from nickel mines in Canada were given preliminary enrichment there and then shipped to Mond's works at Clydach, near Swansea, Wales for final purification.

[9] Abroad, he was elected to membership of the German Chemical Society, the Società Reale of Naples, and the Prussian Akademie der Wissenschaften.

He received honorary doctorates from the universities of Padua, Heidelberg, Manchester and Oxford and was awarded the grand cordon of the Order of the Crown of Italy.

In his later years he had built up a collection of old master paintings and he left the greater proportion of these to the National Gallery, London.

This home, the Palazzo Zuccari, was first leased and then (1904) bought in the name of his wife's friend Henriette Hertz, who developed it into a study centre for the history of art now called Bibliotheca Hertziana.

Although he had never practised any religion he was buried with Jewish rites at St Pancras cemetery where his sons erected a mausoleum.