Complex sentence: Before the process with titanium white had been fully solved, Jebsen he had become chief executive officer of Elektrokemisk in 1912, and in 1916 he became chairman of the new company Titan Co. which produced titanium dioxide.
Split into simpler sentences: Before the process of producing titanium white had been fully figured out, Jebsen had become chief executive officer of Elektrokemisk. This happened in 1912, and in 1916 he became chairman of the new company Titan Co. which produced titanium dioxide.