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Chemische Industrie Uithoorn (Cindu, later ''Cindu Chemicals'') was a chemical company in Uithoorn, Netherlands specialising in processing from coal tar. The company was founded in 1922 as ''Teerbedrijf Uithoorn'' (''TEBU''), and operated under a number of company names. It was acquired by Koppers in 2010 and renamed ''Koppers Netherlands''. A subsidiary producing polymers from tar derived chemicals was formed in 1960 as ''Neville Cindu Chemie'' (later ''Nevcin Polymers'') and operated from the same site in Uithoorn. A reactor at the factory exploded in 1992, causing three deaths and several injuries. Cindu ceased operations in 2014. History Industrial chemical activity in Uithoorn dates to at least 1863; the ''Koninklijke Chemische Fabriek'' produced primarily Sulphuric acid the site. The company was acquired by rival sulphuric acid produced Ketjen en Co.Ketjen, founded by Gerhard Tileman Ketjen; one of the predecessor companies of AKZO. who concentrated their manufacturing capa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uithoorn
Uithoorn () is a municipality and a town in the Netherlands, in the province of North Holland. Population centres The municipality of Uithoorn consists of the following cities, towns, villages and/or districts: De Kwakel and Uithoorn. ''Dutch topographic map of the municipality of Uithoorn, June 2015'' History The name ''De Uithoorn'' (or also ''De Uythoorn'') was used at the end of the Middle Ages for the location of the lower courts of the deanery of Saint John. The village formed around its courthouse. People depended on agriculture and animal husbandry. Agriculture became increasingly more difficult due to the steady soil subsidence. From c. 1600 on, peat extraction became important and resulted in the formation of large ponds, which in turn would be made into polders later on. During the Franco-Dutch War in the "disaster year" of 1672, Uithoorn was on the front lines and fortifications were built. During the Batavian Republic period, the neighbouring village of Tham ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Black
Carbon black (subtypes are acetylene black, channel black, furnace black, lamp black and thermal black) is a material produced by the incomplete combustion of coal and coal tar, vegetable matter, or petroleum products, including fuel oil, fluid catalytic cracking tar, and ethylene cracking. Carbon black is a form of paracrystalline carbon that has a high surface-area-to-volume ratio, albeit lower than that of activated carbon. It is dissimilar to soot in its much higher surface-area-to-volume ratio and significantly lower (negligible and non-bioavailable) polycyclic aromatic hydrocarbon (PAH) content. However, carbon black can be used as a model compound for diesel soot to better understand how diesel soot behaves under various reaction conditions as carbon black and diesel soot have some similar properties such as particle sizes, densities, and copolymer adsorption abilities that contribute to them having similar behaviours under various reactions such as oxidation experiments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indene
Indene is a flammable polycyclic hydrocarbon with chemical formula . It is composed of a benzene ring fused with a cyclopentene ring. This aromatic liquid is colorless although samples often are pale yellow. The principal industrial use of indene is in the production of indene/coumarone thermoplastic resins. Substituted indenes and their closely related indane derivatives are important structural motifs found in many natural products and biologically active molecules, such as sulindac. Isolation Indene occurs naturally in coal-tar fractions boiling around 175–185 °C. It can be obtained by heating this fraction with sodium to precipitate solid "sodio-indene". This step exploits indene's weak acidity evidenced by its deprotonation by sodium to give the indenyl derivative. The sodio-indene is converted back to indene by steam distillation. Reactivity Indene readily polymerises. Oxidation of indene with acid dichromate yields homophthalic acid (''o''-carboxylphenylace ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinyltoluene
4-Vinyltoluene is an organic compound with the formula CH3C6H4CH=CH2. It is derivative of styrene and is used as a comonomer in the production of specialized polystyrenes. It is produced by the dehydrogenation of 4-ethyltoluene. It is also sometimes used in the production of styrene-free Polyester resin Polyester resins are synthetic resins formed by the reaction of dibasic organic acids and polyhydric alcohols. Maleic anhydride is a commonly used raw material with diacid functionality in unsaturated polyester resins. Unsaturated polyester resins .... References {{Hydrocarbons Monomers Vinylbenzenes C3-Benzenes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Styrene
Styrene () is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid, although aged samples can appear yellowish. The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. Styrene is the precursor to polystyrene and several copolymers. Approximately 25 million tonnes of styrene were produced in 2010, increasing to around 35 million tonnes by 2018. Natural occurrence Styrene is named after storax balsam (often commercially sold as ''styrax''), the resin of Liquidambar trees of the Altingiaceae plant family. Styrene occurs naturally in small quantities in some plants and foods (cinnamon, coffee beans, balsam tree (other), balsam trees and peanuts) and is also found in coal tar. History In 1839, the German apothecary Eduard Simon isolated a volatile liquid from the resin (called ''storax'' or ''styrax'' (Latin)) of the Liquidambar styraciflua, American sweetgu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicyclopentadiene
Dicyclopentadiene, abbreviated DCPD, is a chemical compound with formula C10H12. At room temperature, it is a white brittle wax, although lower purity samples can be straw coloured liquids. The pure material smells somewhat of soy wax or camphor, with less pure samples possessing a stronger acrid odor. Its energy density is 10,975 Wh/l. Dicyclopentadiene is a co-produced in large quantities in the steam cracking of naphtha and gas oils to ethylene. The major use is in resins, particularly, unsaturated polyester resins. It is also used in inks, adhesives, and paints. The top seven suppliers worldwide together had an annual capacity in 2001 of 179 kilotonnes (395 million pounds). Synthesis and structure The spontaneous dimerization of cyclopentadiene at room temperature to form dicyclopentadiene proceeds to around 50% conversion over 24 hours and yields the ''endo'' isomer in better than 99:1 ratio as the kinetically favored product (about 150:1 ''endo'':''exo'' at 80 °C). How ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
