Shale oil extraction in the context of "Industrial process"

In a chemistry laboratory, a retort is a device used for distillation or dry distillation of substances. It consists of a spherical vessel with a long downward-pointing neck. The liquid to be distilled is placed in the vessel and heated. The neck acts as a condenser, allowing the vapors to condense and flow along the neck to a collection vessel placed underneath.

In the chemical industry, a retort is an airtight vessel in which substances are heated for a chemical reaction producing gaseous products to be collected in a collection vessel or for further processing. Such industrial-scale retorts are used in shale-oil extraction, in the production of charcoal and in the recovery of mercury in gold-mining processes or from hazardous waste. A process of heating oil shale to produce shale oil, oil shale gas, and spent shale is commonly called retorting. Airtight vessels to apply pressure as well as heat are called autoclaves.

Bathgate (Scots: Bathket or Bathkit, Scottish Gaelic: Both Chèit) is a town in West Lothian, Scotland, 5 miles (8 km) west of Livingston and adjacent to the M8 motorway. Nearby towns are Linlithgow, Livingston, and West Calder. A number of villages fall under the umbrella of Bathgate, including Blackburn, Whitburn, Stoneyburn, Armadale, Torphichen and Fauldhouse.

Situated 2 miles (3 km) south of the ancient Neolithic burial site at Cairnpapple Hill, Bathgate and the surrounding area show signs of habitation since about 3500 BC and the world's oldest known reptile fossil has been found in the town. By the 12th century, Bathgate was a small settlement, with a church at Kirkton and a castle south of the present day town centre. Local mines were established in the 17th century but the town remained small in size until the coming of the industrial revolution. By the Victorian era, Bathgate grew in prominence as an industrial and mining centre, principally associated with the coal and shale oil industries. By the early 20th century, much of the mining and heavy industry around the town had ceased and the town developed manufacturing industries, principally in vehicle production and later electronics before these factories closed in the late 20th century.

Spent shale or spent oil shale (also known as retorted shale) is a solid residue from the shale-oil extraction process of producing synthetic shale oil from oil shale. It consists of inorganic compounds (minerals) and remaining organic matter known as char—a carbonaceous residue formed from kerogen. Depending on the extraction process and the amount of remaining organic matter, spent shale may be classified as oil shale coke, semi-coke, or coke-ash residue, known also as oil shale ash. According to the European Union waste list, all these types of spent shale are classified as hazardous waste.

Oil shale coke is created by chamber ovens which were used for oil shale gas production. Vertical retorts create mainly semi-coke. Most solid heat-carrier processes create coke-ash residue, as the semi-coke created during the process is combusted for the process's energy needs.