Description: technologyComment of adipic acid production (RER, RoW): This dataset models the production of adipic acid by nitric acid oxidation of a mixture of cyclohexanol and cyclohexanone, which is obtained by oxidation of cyclohexane. Abatement of N2O emissions is assumed to reduce the emissions by 80%. Essentially all production of adipic acid is derived from the nitric acid oxidation of a mixture of cyclohexanone – cyclohexanol (KA mixture). The reactor, controlled at 60 – 80 °C and 0.1 – 0.4 MPa, is charged with the recycled nitric acid stream, the KA feed material, and makeup acid containing 50 – 60 % nitric acid and copper – vanadium catalyst. The reaction is very exothermic (6.280 MJ/kg). Adipic acid is obtained with a yield greater than 90%. Nitrogen oxides, carbon dioxide, and some lower dicarboxylic acids are the major by-products, as well as oxidation products arising from impurities in the KA intermediate. The nitric acid oxidation step produces three major waste streams: an off-gas containing oxides of nitrogen and CO2, water containing traces of nitric acid and organics from the water removal column; and a dibasic acid purge stream containing adipic, glutaric and succinic acids. The production of adipic acid can be represented by the following simplified reaction formula: 0.733 C6H12O + 0.367 C6H10O + 2 HNO3 -> C6H10O4 + N2O + 2 H2O + 7.23 H2 References: Althaus H.-J., Chudacoff M., Hischier R., Jungbluth N., Osses M. and Primas A. (2007) Life Cycle Inventories of Chemicals. ecoinvent report No. 8, v2.0. EMPA Dübendorf, Swiss Centre for Life Cycle Inventories, Dübendorf, CH.
Types:
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text_type: Report,
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Comment: This is a market activity. Each market represents the consumption mix of a product in a given geography, connecting suppliers with consumers of the same product in the same geographical area. Markets group the producers and also the imports of the product (if relevant) within the same geographical area. They also account for transport to the consumer and for the losses during that process, when relevant. This is the market for 'adipic acid', in the Global geography. Transport from producers to consumers of this product in the geography covered by the market is included. 'adipic acid' is an organic substance with a CAS no. : 000124-04-9. It is called 'hexanedioic acid' under IUPAC naming and its molecular formula is: C6H10O4. It is solid under normal conditions of temperature and pressure, has a white colour and has a crystalline form. The substance is modelled as a pure substance. On a consumer level, is used in the following products: washing & cleaning products. On industrial sites, the substance is used for the manufacture of products in the following sectors: pH regulators and water treatment products, polymers and leather treatment products. This substance is used for the synthesis of other substances (use as intermediate). This market is supplied by the following activities with the given share: adipic acid production, RER: 0.174 adipic acid production, RoW: 0.826 generalComment of adipic acid production (RER, RoW): This dataset represents the production of 1 kg of adipic acid. Adipic acid is isolated as colourless, odourless crystals having an acidic taste. It is very soluble in methanol and ethanol, soluble in water and acetone, and very slightly soluble in cyclohexane and benzene. Adipic acid crystallises as monoclinic prisms from water, ethyl acetate, or acetone - petroleum ether. Solubility in water increases rapidly with temperature. Adipic acid is the most commercially significant aliphatic dicarboxylic acid. Appearing in nature in only minor amounts, it is synthesised on a very large scale world-wide. Adipic acid is an organic compound used for the production of nylon 66 polyamide, which is widely used for the production of synthetic textiles and plastics. This dataset is based on estimations using industrial data. It models the production of adipic acid by the nitric acid oxidation of a mixture of cyclohexanone – cyclohexanol (KA mixture) which is produced by the oxidation of cyclohexane. More than 80% of the total production is through this process. Only the most important flows are taken into account. The energy and water demands are approximated based on data from a large chemical factory (Gendorf 2016). References: Althaus H.-J., Chudacoff M., Hischier R., Jungbluth N., Osses M. and Primas A. (2007) Life Cycle Inventories of Chemicals. ecoinvent report No. 8, v2.0. EMPA Dübendorf, Swiss Centre for Life Cycle Inventories, Dübendorf, CH. Gendorf (2016) Umwelterklärung 2015, Werk Gendorf Industriepark, www.gendorf.de.
Origin: /Bund/UBA/ProBas
Tags: Zyklohexan ? Adipinsäure ? Vanadium ? Kupfer ? Katalysator ? Salpetersäure ? Schweiz ? Lachgas ? Futtermittel ? Kohlendioxid ? Stickoxide ? Abfallart ? Chemikalien ? Nebenprodukt ? Oxidation ? Reaktor ? Zwischenprodukt ? Entwässerung ? Manufacture of basic chemicals ? Manufacture of basic chemicals, fertilizers and nitrogen compounds, plastics and synthetic rubber in primary forms ? Manufacture of chemicals and chemical products ? Manufacturing ?
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Language: Deutsch
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