- Method for preparing ethylene diamine tetraacetic acid disodium
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The invention discloses a method for preparing ethylene diamine tetraacetic acid disodium by means of a membrane chemical reactor. The method comprises the steps of 1, material feeding, wherein a certain amount of deionized water is put into the membrane chemical reactor, and then liquid sodium hydroxide and ethylene diamine tetraacetic acid are put into the membrane chemical reactor according to the mass ratio of 2:4 at 95 DEG C by eight batches till the pH value of reaction solution is 5; 2, heat insulation, after materials are fed, heat insulation is conducted on the reaction solution at 90 DEG C for 45 min, and the pH value of reaction solution is controlled to be 5. The preparing process is simple, parallel reaction selectivity and safety are high, three wastes are not generated basically during production, the produced ethylene diamine tetraacetic acid disodium powder is pure white, purity is 99.8% or more, and quality is stable.
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Paragraph 0014-0019
(2018/02/04)
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- VINYL MONOMERS HAVING CHELATING FUNCTIONALITY
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The present invention provides novel polymerizable monomers having chelating functionality and processes to make them. In particular, the novel monomers are ethylenically unsaturated aminocarboxylates and are prepared by reacting ethylenediamine triacetic acid or its salt with an ethylenically unsaturated monomer. The ethyleneically unsaturated monomer may be a polymerizable vinyl monomer selected from (o-, p-, m-)DVBMO, allyl glycidyl ether, and glycidyl (meth)acrylate.
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Page/Page column 10-11
(2013/05/22)
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- NOVEL POWDERED POLYMER, PREPARATION METHOD THEREOF AND USE OF SAME AS A THICKENER
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Disclosed is a branched or crosslinked anionic polyelectrolyte of at least one monomer having a partially- or totally-salified strong acid function, with at least one neutral monomer and at least one monomer having formula (I), wherein: R represents a linear or branched alkyl radical including between 8 and twenty carbon atoms, and n represents a number greater than or equal to 1 and less than or equal to twenty. Also described is the use thereof as a thickener in topical compositions.
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- AMINOCARBOXYLATE POWDERS WITH IMPROVED PURITY AND FLOW ABILITY PROPERTIES
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Provided is a method for preparing stable free flowing solid aminocarboxylate chelants by adding to a chelant that contains residual alkaline metal hydroxide a free or partially neutralized carboxylic acid such that the free or partially neutralized acid neutralizes at least a portion of the alkaline metal hydroxide; and isolating therefrom the free-flowing solid chelant.
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Page/Page column 10-11
(2011/12/04)
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- Cleansing foaming lotion
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The invention described herein includes a formulation comprising: a structurant and an emulsion comprising a homogenized mixture of wax and alcohol components, at least one of which is a surfactant, wherein the formulation comprises a stable lamellar or spherulite phase.
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- ALKOXY ARYL BETA2 ADRENERGIC RECEPTOR AGONISTS
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The invention provides novel β2 adrenergic receptor agonist compounds. The invention also provides pharmaceutical compositions comprising such compounds, methods of using such compounds to treat diseases associated with β2 adrenergic receptor activity, and processes and intermediates useful for preparing such compounds.
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- Preparation and crystal structure of the trans(O5) isomer of magnesium(ethylenediamine-N,N,N'-triacetato-N'-3-propionato)cuprate(II) octahydrate, Mg[Cu(ed3ap)]·8H2O. Stereochemistry of octahedral Cu(II)-EDTA-type complexes in relation to the structure of the ligand
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The hexadentate complex trans(O5)-Mg[Cu(ed3ap)]·8H2O (1) (ed3ap=ethylenediamine-N,N,N'-triacetate-N'-3-propionate (4-) ion) has been prepared and its structure established by X-ray crystallography. The complex crystallizes in space group Pna21 of the orthorhombic crystal system. The structure converged to R = 0.076 for 2213 observed reflections. The Cu(II) ion is surrounded by two nitrogen and four oxygen atoms of the ligand, making an elongated rhombic octahedron (tetragonality, T = 0.859). The conformations of the chelate rings of the complex anion were found to be an envelope (or twist) for the five-membered rings and a distorted skew-boat (half-chair) for the G2 β-alaninate ring. The extremely large total deviation observed for the R2 ring (- 11°) is not common for axially coordinated glycinates in M-edta-type complexes. A comparison of the structures of octahedral Cu(II)-edta-type complexes shows an expected variation in their stereochemistry, depending on the structure of the ligand and the geometry of the complex. Data for the electronic absorption and reflectance spectra are also reported.
- Radanovic, Dusan J.,Ama, Tomoharu,Guresic, Dejan M.,Ristanovic, Divna M.,Radanovic, Dusanka D.,Kawaguchi, Hiroshi
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p. 2283 - 2288
(2007/10/03)
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- Synthesis and vibrational study of some polydentate ligands
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Sodium salts of iminodiacetic acid (IDA), ethylenediaminetetraacetic acid (EDTA), 1,2-propylenediaminetetraacetic acid (PDTA) and 1,2-diaminocyclohexanetetraacetic acid (DCTA) were prepared by modification of the literature methods and their i.r. and Raman spectra were studied.The results obtained by application of both techniques allowed a better characterization of these polydentate ligands.Raman spectroscopy was specially useful in elucidating structural aspects in compounds containing acetate groups.
- Esteban, M. F. Gargallo,Serrano, Vilaplana R.,Vilchez, F. Gonzalez
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p. 1039 - 1044
(2007/10/02)
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