Around the First World War, he was considered a remarkable importer of saltpetre from his own mines in Chile, and was listed as the richest person in Hamburg.
When his father had lost all his assets in the Crimean War, he sent Henry and his sister Harriet to wealthy relatives in Hamburg.
[2] After 22 years of working for Fölsch & Martin, Sloman established his own saltpetre business in Tocopilla and returned to Hamburg in 1889 as a wealthy man.
In 1922, Sloman commissioned the Chilehaus (Chile House), a ten-story office building in Hamburg that is notable for its architecture.
[5] Henry B. Sloman married Renata Hilliger on 5 February 1881[5] with whom he had four children: Adelaida (1881–1901), Enrique Juan, Ricardo Federico (1885–1983), and Alfred Herbert (1887–1935).