Grange Chemicals
1956 British Hydrocarbon Chemicals had 2 subsidiaries - Forth Chemicals and Grange Chemicals[1], the latter being one-third owned by the Oronite Co of California.
1968 BP Chemicals was negotiating to acquire Chevron Chemical Co's share in Grange Chemicals phthalic anhydride plant at Salt End, Hull[2]
1969 BP Chemicals ran down and replaced the 5-year old Grange Chemical phthalic anhydride plant[3]