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Atlas Chemical Company, chemical manufacturers of Widnes
1873 They set up the Atlas Chemical Company, Widnes, to make salt-cake and hydrochloric acid by Hargreaves's method. Hot gases from pyrites burners, mixed with steam, were passed over small blocks of moulded salt, a process which worked successfully for many years
1888 Mr T Robinson, who was a director of the company as well as of the Liver Alkali Works was to be a director of the British Patent Portland Cement Co Ltd formed to purchase the rights to a new type of Portland cement made from caustic lime mud to the patent of Mr John S. Rigby and build works at Widnes and St. Helens.
1890 the works were absorbed by the United Alkali Co
1896 Atlas Works closed
1918 the last Hargreaves–Robinson salt-cake plant closed.