Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range of salts with the formula FeSO4·xH2O. These compounds exist most commonly as the heptahydrate (x = 7) but are known for several values of x. The hydrated form is used medically to treat iron deficiency, and also for industrial applications. Known since ancient times as copperas and as green vitriol (vitriol is an archaic name for sulfate), the blue-green heptahydrate (hydrate with 7 molecules of water) is the most common form of this material. All the iron(II) sulfates dissolve in water to give the same aquo complex [Fe(H2O)6]2+, which has octahedral molecular geometry and is paramagnetic. The name copperas dates from times when the copper(II) sulfate was known as blue copperas, and perhaps in analogy, iron(II) and zinc sulfate were known respectively as green and white copperas.
Yunnan is a landlocked province in the southwest of the People's Republic of China. The province spans approximately 394,000 square kilometres (152,000 sq mi) and has a population of 48.3 million. The capital of the province is Kunming. The province borders the Chinese provinces of Guizhou, Sichuan, autonomous regions of Guangxi, and Tibet as well as Southeast Asian countries: Vietnam, Laos, and Myanmar. Yunnan is China's fourth least developed province based on disposable income per capita in 2014.
Cupronickel or copper-nickel (CuNi) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. The copper content typically varies from 60 to 90 percent.
Kunming is the capital and largest city of Yunnan province, People's Republic of China. Also known as Yunnan-Fu, today it is a prefecture-level city and the political, economic, communications and cultural centre of the province as well as the seat of the provincial government. The headquarters of many of Yunnan's large businesses are in Kunming. It was important during World War II as a Chinese military center, American air base, and transport terminus for the Burma Road. Located in the middle of the Yunnan–Guizhou Plateau, Kunming is located at an altitude of 1,900 metres above sea level and at a latitude just north of the Tropic of Cancer. As of 2014, Kunming has a population of 6,626,000 with an urban population of 4,575,000. It is located at the northern edge of Dian Lake, and is surrounded by temples and lake-and-limestone hill landscapes.
Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds with the chemical formula CuSO4(H2O)x, where x can range from 0 to 5. The pentahydrate (x = 5) is the most common form. Older names for this compound include blue vitriol, bluestone, vitriol of copper, and Roman vitriol.
Copper sulfate may refer to:
Barium sulfate (or sulphate) is the inorganic compound with the chemical formula BaSO4. It is a white crystalline solid that is odorless and insoluble in water. It occurs as the mineral barite, which is the main commercial source of barium and materials prepared from it. The white opaque appearance and its high density are exploited in its main applications.
Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.
The Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist, and consists of a copper pot filled with a copper (II) sulfate solution, in which is immersed an unglazed earthenware container filled with sulfuric acid and a zinc electrode. He was searching for a way to eliminate the hydrogen bubble problem found in the voltaic pile, and his solution was to use a second electrolyte to consume the hydrogen produced by the first. Zinc sulfate may be substituted for the sulfuric acid. The Daniell cell was a great improvement over the existing technology used in the early days of battery development. A later variant of the Daniell cell called the gravity cell or crowfoot cell was invented in the 1860s by a Frenchman named Callaud and became a popular choice for electrical telegraphy.
Tetraamminecopper(II) sulfate is the salt with the formula [Cu(NH3)4]SO4·H2O. This dark blue to purple solid is a salt of the metal complex [Cu(NH3)4(H2O)]2+. It is closely related to Schweizer's reagent, which is used for the production of cellulose fibers in the production of rayon. It is used to print fabrics, used as a pesticide and to make other copper compounds like copper nano-powder.
Panzhihua, formerly Dukou (渡口), is a prefecture-level city located in the far south of Sichuan province, People's Republic of China, at the confluence of the Jinsha and Yalong Rivers. It has an administrative area of 74,423.42 square kilometres (28,735.04 sq mi), and a population at the 2010 census of 1,214,121. 662,814 lived in the metropolitan area made of 3 urban districts.
Dongchuan District is one of seven districts of the prefecture-level city of Kunming, the capital of Yunnan Province, People's Republic of China. The district was approved to form from the former Dongchuan City by the State Council on December 6, 1998.
Mixian is a type of rice noodle from the Yunnan Province, China. It is made from ordinary non-glutinous rice, and it is generally sold fresh rather than dried.
The Kunming High-tech Industrial Development Zone is a state-level high-tech industrial zone established in 1992 in Northwest Kunming, Yunnan Province, China. It is administratively under Kunming Prefecture. It covers an area of 9 square kilometers. The zone is located in the northwest part of Kunming city, four kilometers from Kunming Railway Station and five kilometers from Kunming International Airport.
Yunnan Chihong Zinc and Germanium Company Limited is the state-owned enterprise engaged in the processing, extracting and prospecting and trading of zinc, lead, germanium and sulphuric acid products.
Xingye Alloy Materials Group Limited was formerly known as Huan Yue Interactive Holdings Limited, and Xingye Copper International Group Limited, one of the leading high precision copper producer in China. It mainly involves in producing high precision copper plates and strips, tin phosphorus bronze plates and strips, brass plates and strips, lead frame strips and nickel silver plates and strips. Its products are sold under the “Three Rings” brand, which has been awarded recognition as a “China Top Brand”. It is established in 1998 and headquartered in Cixi, Ningbo, Zhejiang province, China.
Yunnan Tin Group (Holding) Company Limited (YTC) is the largest tin producer and exporter in China and the world. It is headquartered in Kunming, Yunnan. It involves in the production, processing and export of tin metal, and also for the production of tin-based and arsenic-based chemicals. It was established in 1883 by the Government of Qing Dynasty as the Gejiu Manufacture & Commercial Bureau.
Palabora Mining Company Limited is a publicly traded mining company headquartered in Phalaborwa, Limpopo province, South Africa. The company operates a single cluster of open-pit and underground mines producing mainly copper as well as byproducts such as precious metals from anode slimes, nickel sulfate, sulfuric acid, magnetite, and vermiculite. Palabora also has processing facilities on site for the production of purified copper from mined copper ore, and a vermiculite recovery plant. Its final copper product has two forms namely, copper cathode and copper rod.
Tin mining began early in the Bronze Age, as bronze is a copper-tin alloy. Tin is a relatively rare element in the Earth’s crust, with approximately 2 ppm, compared to iron with 50,000 ppm.
Qing dynasty coinage was based on a bimetallic standard of copper and silver coinage. The Manchu-led Qing dynasty was established in 1636 and ruled over China proper from 1644 until it was overthrown by the Xinhai Revolution in 1912. The Qing dynasty saw the transformation of a traditional cash coin based cast coinage monetary system into a modern currency system with machine-struck coins, while the old traditional silver ingots would slowly be replaced by silver coins based on those of the Mexican peso. After the Qing dynasty was abolished its currency was replaced by the Chinese yuan of the Republic of China.
