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Trisodium Dicarboxymethyl Alaninate
Trisodium ''N''-(1-carboxylatoethyl)iminodiacetate, methylglycinediacetic acid trisodium salt (MGDA-Na3) or trisodium α-DL-alanine diacetate (N-(2-Carboxyethyl)iminodiacetic acid, α-ADA), is the trisodium anion of ''N''-(1-carboxyethyl)iminodiacetic acid and a tetradentate complexing agent. It forms stable 1:1 chelate complexes with cations having a charge number of at least +2, e.g. the "Hard water, hard water forming" cations Calcium, Ca2+ or Mg²⁺, Mg2+. α-ADA is distinguished from the isomeric β-alaninediacetic acid by better biodegradability and therefore improved environmental compatibility. Production The patent literature on the industrial synthesis of trisodium ''N''-(1-carboxylatoethyl)iminodiacetate describes the approaches for solving the key requirements of a manufacturing process that can be implemented on an industrial scale, characterized by * Achieving the highest possible space-time yields * Simple reaction control at relatively low pressures and temperat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N-(2-Carboxyethyl)iminodiacetic Acid
''N''-(2-Carboxyethyl)iminodiacetic acid or β-ADA (β-alanine diacetate) is an organic compound with the formula . It is a white solid. The compound is classified as an aminocarboxylic acid, formally a derivative of glycine. Ligand properties The conjugate base is tetradentate complexing agent that forms 1:1 complexes with cations having a charge number of at least +2, e.g. the "Hard water, hard water forming" cations Calcium, Ca2+ or Magnesium, Mg2+. ''N''-(2-Carboxyethyl)iminodiacetic acid should not be confused with α-alaninediacetic acid, also known as methylglycinediacetic acid (MGDA) or α-ADA. Alkaline earth and heavy metal complexes of both, α-ADA and β-ADA are biodegradable (in contrast to chelate complexes with conventional complexing agents such as Ethylenediaminetetraacetic acid, EDTA). Production ''N''-(2-carboxyethyl)iminodiacetic acid was first prepared from Β-Alanine, β-alanine and Monochloroacetic Acid, monochloroacetic acid as reported by Gerold Schwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iminodiacetic Acid
Iminodiacetic acid is the organic compound with the formula HN(CH2CO2H)2, often abbreviated to IDA. A white solid, the compound is a dicarboxylic acid amine (the nitrogen atom forms a secondary amino group, not an imino group as the name suggests). The iminodiacetate dianion is a tridentate ligand, forming metal complexes by forming two, fused, five membered chelate rings. The proton on the nitrogen atom can be replaced by a carbon atom of a polymer to create an ion-exchange resin, such as chelex 100. Complexes of IDA and EDTA were introduced in the early 1950's by Schwarzenbach. IDA forms stronger complexes than the bidentate ligand glycine and weaker complexes than the tetradentate ligand nitrilotriacetic acid. It can also act as a bidentate ligand through its two carboxylate groups. Several technetium-99''m'' complexes are used in cholescintigraphy scans (also known as ''hepatobiliary iminodiacetic acid scans'') to evaluate the health and function of the gallbladder. Im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethylenediaminetetraacetic Acid
Ethylenediaminetetraacetic acid (EDTA) is an aminopolycarboxylic acid with the formula H2N(CH2CO2H)2sub>2. This white, water-soluble solid is widely used to bind to iron (Fe2+/Fe3+) and calcium ions (Ca2+), forming water-soluble complexes even at neutral pH. It is thus used to dissolve Fe- and Ca-containing scale as well as to deliver iron ions under conditions where its oxides are insoluble. EDTA is available as several salts, notably disodium EDTA, sodium calcium edetate, and tetrasodium EDTA, but these all function similarly. Uses Textile industry In industry, EDTA is mainly used to sequester (bind or confine) metal ions in aqueous solution. In the textile industry, it prevents metal ion impurities from modifying colours of dyed products. In the pulp and paper industry, EDTA inhibits the ability of metal ions, especially Mn2+, from catalysing the disproportionation of hydrogen peroxide, which is used in chlorine-free bleaching. In a similar manner, EDTA is added ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrasodium Iminodisuccinate
Tetrasodiumiminodisuccinate is a sodium salt of iminodisuccinic acid, also referred to as ''N''-(1,2-dicarboxyethyl)aspartic acid.Van Iperen InternationalIDHA-chelates/ref> Preparation Iminodisuccinic acid can be prepared by reacting maleic anhydride with ammonia and sodium hydroxide: For the synthesis of tetrasodium iminodisuccinate, maleic anhydride is reacted with sodium hydroxide in water at elevated temperature. A concentrated disodium maleate solution is formed to which ammonia is added at 90 to 145 °C, than excess water and ammonia is distilled off. An aqueous solution containing about 34% tetrasodium iminodisuccinate is obtained with yields of up to 98%.Lanxess AG, ''General Product Information''Baypure/ref> Spray-drying can be used to obtain a mixture of solids consisting of> 65% tetrasodium iminodisuccinate salts (essentially the tetra sodium salts), <2% maleic acid sodium salts, <8% fumaric acid sodium salts, <2% malic acid sodium salts, <15% aspartic acid s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethylenediaminetetraacetic Acid
Ethylenediaminetetraacetic acid (EDTA) is an aminopolycarboxylic acid with the formula H2N(CH2CO2H)2sub>2. This white, water-soluble solid is widely used to bind to iron (Fe2+/Fe3+) and calcium ions (Ca2+), forming water-soluble complexes even at neutral pH. It is thus used to dissolve Fe- and Ca-containing scale as well as to deliver iron ions under conditions where its oxides are insoluble. EDTA is available as several salts, notably disodium EDTA, sodium calcium edetate, and tetrasodium EDTA, but these all function similarly. Uses Textile industry In industry, EDTA is mainly used to sequester (bind or confine) metal ions in aqueous solution. In the textile industry, it prevents metal ion impurities from modifying colours of dyed products. In the pulp and paper industry, EDTA inhibits the ability of metal ions, especially Mn2+, from catalysing the disproportionation of hydrogen peroxide, which is used in chlorine-free bleaching. In a similar manner, EDTA is added ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrasodium Iminodisuccinate
Tetrasodiumiminodisuccinate is a sodium salt of iminodisuccinic acid, also referred to as ''N''-(1,2-dicarboxyethyl)aspartic acid.Van Iperen InternationalIDHA-chelates/ref> Preparation Iminodisuccinic acid can be prepared by reacting maleic anhydride with ammonia and sodium hydroxide: For the synthesis of tetrasodium iminodisuccinate, maleic anhydride is reacted with sodium hydroxide in water at elevated temperature. A concentrated disodium maleate solution is formed to which ammonia is added at 90 to 145 °C, than excess water and ammonia is distilled off. An aqueous solution containing about 34% tetrasodium iminodisuccinate is obtained with yields of up to 98%.Lanxess AG, ''General Product Information''Baypure/ref> Spray-drying can be used to obtain a mixture of solids consisting of> 65% tetrasodium iminodisuccinate salts (essentially the tetra sodium salts), <2% maleic acid sodium salts, <8% fumaric acid sodium salts, <2% malic acid sodium salts, <15% aspartic acid s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raney Copper
Raney is a surname, and may refer to: * Albert Raney, Sr. (contemporary), developer of Mystic Caverns in Arkansas, USA *Catherine Raney (born 1980), American Olympic speed skater *Chad Raney (born 1970), American entrepreneur; founder of Lone Star Music *Della H. Raney (1912-1987), African American Army nurse. *Doug Raney (born 1956), American jazz guitarist; son of Jimmy Raney *George P. Raney (1845–1911), American politician and jurist; justice of the Florida Supreme Court 1885–1894 *Jimmy Raney (1927–1995), American jazz guitarist *John Henry Raney (1849–1928), American politician from Missouri; U.S. representative 1895–97 *John N. Raney (born 1947), American politician and businessman *Murray Raney (1885–1966), American mechanical engineer; inventor of Raney nickel *Paul Hartley Raney (1892–1917), Canadian fighter pilot killed in World War I *Sue Raney (born 1940), American jazz singer *Tom Raney, comic-book artist. *Wayne Raney (1921–1993), American country singe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autoclave (industrial)
An autoclave is a machine used to carry out industrial and scientific processes requiring elevated temperature and pressure in relation to ambient pressure and/or temperature. Autoclaves are used before surgical procedures to perform sterilization and in the chemical industry to cure coatings and vulcanize rubber and for hydrothermal synthesis. Industrial autoclaves are used in industrial applications, especially in the manufacturing of composites. Many autoclaves are used to sterilize equipment and supplies by subjecting them to pressurized saturated steam at for around 30-60 minutes at a pressure of 15 psi (103 kPa or 1.02 atm) depending on the size of the load and the contents. The autoclave was invented by Charles Chamberland in 1879, although a precursor known as the steam digester was created by Denis Papin in 1679. The name comes from Greek ''auto-'', ultimately meaning self, and Latin ''clavis'' meaning key, thus a self-locking device. Uses Sterilization au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethylene Oxide
Ethylene oxide is an organic compound with the formula . It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms. Ethylene oxide is a colorless and flammable gas with a faintly sweet odor. Because it is a strained ring, ethylene oxide easily participates in a number of addition reactions that result in ring-opening. Ethylene oxide is isomeric with acetaldehyde and with vinyl alcohol. Ethylene oxide is industrially produced by oxidation of ethylene in the presence of silver catalyst. The reactivity that is responsible for many of ethylene oxide's hazards also makes it useful. Although too dangerous for direct household use and generally unfamiliar to consumers, ethylene oxide is used for making many consumer products as well as non-consumer chemicals and intermediates. These products include detergents, thickeners, solvents, plastics, and various organic chemicals such as ethylene glycol, ethanolamines, simple an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continuous Production
Continuous production is a flow production method used to manufacture, produce, or process materials without interruption. Continuous production is called a continuous process or a continuous flow process because the materials, either dry bulk or fluids that are being processed are continuously in motion, undergoing chemical reactions or subject to mechanical or heat treatment. Continuous processing is contrasted with batch production. Continuous usually means operating 24 hours per day, seven days per week with infrequent maintenance shutdowns, such as semi-annual or annual. Some chemical plants can operate for more than one to two years without a shutdown. Blast furnaces can run from four to ten years without stopping. Common processes Some common continuous processes are the following: * Oil refining *Chemicals * Synthetic fibers *Fertilizers * Pulp and paper *Blast furnace (iron) *Metal smelting *Power stations * Natural gas processing *Sanitary waste water treatme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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