alumina refineries encyclopedia

How aluminum is made - material, manufacture, making, used ...

Approximately 10% of the alumina produced each year is used for applications other than making aluminum. The largest waste product generated in bauxite refining is the tailings (ore refuse) called "red mud." A refinery produces about the same amount of red mud as it does alumina (in terms of dry weight).

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Natural gas - Wikipedia

Natural gas (also called fossil gas; sometimes just gas) is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium. It is formed when layers of decomposing plant and animal matter are exposed to intense heat and ...

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Wisconsin Department of Transportation

12/21/2018. 1/4/2017 60649. 5/21/2018. 9/26/2016 53208. 3/2/2016 53204. 3/25/2019 53220. 7/10/2016 53208. 10/3/2016 53704. 10/15/2016 53227. 4/18/2016 54729. 5/30/2017 70068

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Aluminum sulfate | Al2S3O12 - PubChem

Aluminum Sulfate Anhydrous is an aluminum salt with immune adjuvant activity. This agent adsorbs and precipitates protein antigens in solution; the resulting precipitate improves vaccine immunogenicity by facilitating the slow release of antigen from the vaccine depot formed at the site of inoculation.

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Hydrotreating - an overview | ScienceDirect Topics

Abdullah M. Aitani, in Encyclopedia of Energy, 2004 4.1 Catalytic Hydrotreating. Catalytic hydrotreating is a hydrogenation process used to remove approximately 90% of contaminants, such as nitrogen, sulfur, oxygen, and metals, from liquid petroleum fractions. These contaminants, if not removed from the petroleum fractions as they travel through the refinery processing units, can have ...

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Venezuela - The economy - Encyclopedia Britannica

Venezuela - Venezuela - The economy: The Venezuelan economy is based primarily on the production and exploitation of petroleum. From the late 1940s to 1970 the country was the world''s largest petroleum exporter; it remains one of the principal exporters of oil to the United States. Venezuela''s economy has relied on earnings from the petroleum sector to modernize and diversify other ...

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Petroleum refining - Catalytic cracking | Britannica

Petroleum refining - Petroleum refining - Catalytic cracking: The use of thermal cracking units to convert gas oils into naphtha dates from before 1920. These units produced small quantities of unstable naphthas and large amounts of by-product coke. While they succeeded in providing a small increase in gasoline yields, it was the commercialization of the fluid catalytic cracking process in ...

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Potassium hydroxide | KOH - PubChem

Potassium hydroxide, also known as lye is an inorganic compound with the chemical formula KOH.Also commonly referred to as caustic potash, it is a potent base that is marketed in several forms including pellets, flakes, and powders is used in various chemical, industrial and manufacturing applications. Potassium hydroxide is also a precursor to other potassium compounds.

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List of alumina refineries - Wikipedia

This is a list of alumina refineries in the world. The list is incomplete and missing some data. Smelter-grade alumina refineries. Country Location Coordinates Total Annual Capacity (kt) Ownership Australia Gladstone, Queensland: 3,954 80 % (Rio Tinto Alcan) 20% Rusal: Australia Yarwun ...

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Aluminium oxide - Wikipedia

Aluminium oxide is a chemical compound of aluminium and oxygen with the chemical formula Al 2 O 3 is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide is commonly called alumina and may also be called aloxide, aloxite, or alundum depending on particular forms or applications. It occurs naturally in its crystalline polymorphic ...

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Palladium | Pd - PubChem

Noble metal alloy: (a) Identification. A noble metal alloy is a device composed primarily of noble metals, such as gold, palladium, platinum, or silver, that is intended for use in the fabrication of cast or porcelain-fused-to-metal crown and bridge restorations.(b) Classification. Class II (special controls).

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Natural Resources of the Caribbean | Encyclopedia

Most Caribbean islands import petroleum products, usually from the several oil refineries located in the region. Jamaica became an important producer of bauxite (aluminum ore) and its dehydrated variant, alumina, in the mid-twentieth century, after the discovery of bauxite deposits there in 1942.

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Sodium hydroxide | NaOH - PubChem

Caustic soda reacts with all the mineral acids to form the corresponding salts. It also reacts with weak-acid gases, such as hydrogen sulfide, sulfur dioxide, and carbon dioxide.Caustic soda reacts with amphoteric metals (Al, Zn, Sn) and their oxides to form complex anions such as AlO2(-), ZnO2(-2), SNO2(-2), and H2 (or H2O with oxides).

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