Sulfuric acid the Hellenistic alchemical works of Zosimos of Panopolis, in the treatise "Phisica et Mystica", and the Leyden papyrus X. Medieval Islamic era alchemists, Jābir ibn Hayyān (c. 721 – c. 815 AD, also known as Geber), Razi (865 – 925 AD), and Jamal Din al-Watwat (d. 1318, wrote the book "Mabāhij al-fikar wa-manāhij al-'ibar"), included vitriol in their mineral classification lists. Ibn Sina focused on its medical uses and different varieties of vitriol. Sulfuric acid was called "oil of vitriol" by medieval European alchemists because it was prepared by roasting "green vitriol" (iron(II) sulfate) in an iron retort. There are
History of the petroleum industry in Canada (oil sands and heavy oil) difficulties marketing its oil, the provincial government established a policy that would limit oil sands production. According to this policy, synthetic oil from the oil sands could supplement conventional oil sales, but could not displace it. Oil from the plant could not exceed 5 per cent of total volumes in markets already supplied by conventional Alberta oil. Financial difficulties delayed construction of the GCOS plant until a new investor - Sun Oil Company's Canadian subsidiary, today known as Suncor - was found. The capacity of the proposed plant increased to 7,500 cubic metres per day and the cost escalated from