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1965 results about "Hydroxylamine" patented technology
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Hydroxylamine is an inorganic compound with the formula NH₂OH. The pure material is a white, unstable crystalline, hygroscopic compound. However, hydroxylamine is almost always provided and used as an aqueous solution. It is used to prepare oximes, an important functional group. It is also an intermediate in biological nitrification. In biological nitrification, the oxidation of NH₃ to hydroxylamine is mediated by the enzyme ammonia monooxygenase (AMO). Hydroxylamine oxidoreductase (HAO) further oxidizes hydroxylamine to nitrite.
Oligonucleotides comprising a non-phosphate backbone linkage
One aspect of the present invention relates to a ribonucleoside substituted with a phosphonamidite group at the 3′-position. In certain embodiments, the phosphonamidite is an alkyl phosphonamidite. Another aspect of the present invention relates to a double-stranded oligonucleotide comprising at least one non-phosphate linkage. Representative non-phosphate linkages include phosphonate, hydroxylamine, hydroxylhydrazinyl, amide, and carbamate linkages. In certain embodiments, the non-phosphate linkage is a phosphonate linkage. In certain embodiments, a non-phosphate linkage occurs in only one strand. In certain embodiments, a non-phosphate linkage occurs in both strands. In certain embodiments, a ligand is bound to one of the oligonucleotide strands comprising the double-stranded oligonucleotide. In certain embodiments, a ligand is bound to both of the oligonucleotide strands comprising the double-stranded oligonucleotide. In certain embodiments, the oligonucleotide strands comprise at least one modified sugar moiety. Another aspect of the present invention relates to a single-stranded oligonucleotide comprising at least one non-phosphate linkage. Representative non-phosphate linkages include phosphonate, hydroxylamine, hydroxylhydrazinyl, amide, and carbamate linkages. In certain embodiments, the non-phosphate linkage is a phosphonate linkage. In certain embodiments, a ligand is bound to the oligonucleotide strand. In certain embodiments, the oligonucleotide comprises at least one modified sugar moiety.
Owner:ALNYLAM PHARM INC
Post clean treatment
InactiveUS6546939B1Inorganic/elemental detergent compounding agentsOrganic detergent compounding agentsHydroxylamineHydrazine compound
A composition for removal of chemical residues from metal or dielectric surfaces or for chemical mechanical polishing of a copper or aluminum surface is an aqueous solution with a pH between about 3.5 and about 7. The composition contains a monofunctional, difunctional or trifunctional organic acid and a buffering amount of a quaternary amine, ammonium hydroxide, hydroxylamine, hydroxylamine salt, hydrazine or hydrazine salt base. A method in accordance with the invention for removal of chemical residues from a metal or dielectric surface comprises contacting the metal or dielectric surface with the above composition for a time sufficient to remove the chemical residues. A method in accordance with the invention for chemical mechanical polishing of a copper or aluminum surface comprises applying the above composition to the copper or aluminum surface, and polishing the surface in the presence of the composition.
Owner:DUPONT AIR PRODS NANOMATERIALS
Polyester and polyamide compositions of low residual aldehyde content
A mixture of a polyester, such as poly(ethylene terephthalate) PET, or a polyamide, and a suitable stabilizer selected from the group consisting of hydroxylamine stabilizers, substituted hydroxylamine stabilizers, nitrone stabilizers and amine oxide stabilizers, when extrusion compounded exhibits a lower residual acetaldehyde content than does polyester or polyamide alone when similarly treated. The invention pertains to any polyester or polyamide used in the manufacture of molded articles, fibers or films, for instance bottles or containers which are used to store consumer materials, for example food, beverages and water.
Owner:CIBA SPECIALTY CHEM CORP
Non-radical photochemical crosslinked hydrogel material preparation method, product and application
ActiveCN105131315APrecise and controllable time and spaceEasy to operateOrganic active ingredientsCosmetic preparationsPolymer scienceHydroxylamine
The present invention provides a non-radical photo-crosslinked hydrogel preparation method, comprising the following steps: a component A is dissolved in a biocompatible medium to obtain a solution A, component B-hydrazide, hydroxylamine or primary amine high molecular derivative is dissolved in a biocompatible medium to obtain a solution B; the solution A and the solution B are evenly mixed to obtain a hydrogel precursor solution; under illumination, aldehyde group produced by light excitation of o-nitrobenzyl in the component A of the hydrogel precursor solution is crosslinked with hydrazone, hydroxylamine or primary amine group in the component B in the form of respective formation of oxime and Schiff base to produce the hydrogel. The present invention also provides a kit for the hydrogel preparation, and application of the hydrogel in tissue repair, beauty and as a cell, protein or drug carrier. The tissue surface light-situ gel can be achieved by the hydrogel, in particular, wound surface in-situ thin glue formation can be achieved, and the hydrogel is especially suitable for clinical wound surface tissue repair and isolation.
Owner:上海戴云化工科技有限公司 +2
Synthesis of several metal selenides and tellurides as semiconductor material
InactiveCN1384047AOvercome the problems of high temperature, highly toxic raw materials, complicated process, etc.Low reaction temperatureSemiconductor/solid-state device manufacturingBinary selenium/tellurium compoundsSemiconductor materialsHydroxylamine
By using the soluble salt of transition metalz Zn, Cd, Pb, Mn, Co, Ni, Cu, Ag, Sb and Bi, selenious acid or its solutl salt, or antimonous acid or its soluble salt as raw material, and hydrazine hydrate, sodium borohydride, potassium borohydride, hydroxylamine or hydrazine sulfate as reductant, and through hydrothermal reduction reaction at 100-200 deg.c in a sealed container for 2 hr to 5 days, selenides or tellurides of the said metals as semiconductor material may be synthesized. Unlike available synthesis process, which needs high temperature, toxic feedstock and complex technological course, the present invention has the advantages of low-cost material, simple apparatus, easy control, good technological reproducibility, stable product quality, etc.
Owner:TSINGHUA UNIV
Flame retardant coatings
Provided are flame retardant coating compositions and articles coated therewith, which compositions comprise (A) a coating and (B) an effective flame retarding amount of a mixture of (i) at least one compound selected from the group consisting of the (a) sterically hindered nitroxyl stabilizers, (b) sterically hindered hydroxylamine stabilizers and (c) sterically hindered alkoxyamine stabilizers and (ii) at least one conventional flame retardant selected from the group consisting of (d) organohalogen flame retardants, (e) organophosphorus flame retardants, (f) isocyanurate flame retardants and (g) melamine based flame retardants. The coated articles are for example iron, steel, stainless steel, aluminum and other non-ferrous metals, wood, plywood, paper, cardboard, chip board, particle board, plastics, thermoplastics, epoxies, neoprene, rubber, composites, fiberglass reinforced composites, polyesters, polymeric foam, masonry, fabric or textiles, wire and cable constructions and circuit boards.
Owner:TROUTMAN MALISA +3
Preparing method for RRAM to avoid forming phenomenon using CuxO as storage medium
InactiveCN101051670AAvoid forming phenomenonElectrical apparatusHydroxylamineHydroxylamine Hydrochloride
In RRAM procedure of preparing storage medium of CuxO according to conventional technique, and after storage medium of CuxO film is completed, the method makes the CuxO film contact the stable solution of containing hydroxylamine component for 10-30 minutes to reduce CuO component in thin film to Cu2O. Thus, before use, the device does not need of a voltage activation process with voltage higher than voltage higher of normal operation, i.e. preventing forming phenomena.
Owner:FUDAN UNIV
Flame retardant compositions
Organic polymeric substrates, for example polyolefins such as polypropylene, can be made flame retardant by the incorporation of a synergistic mixture of (i.) a sterically hindered amine of the nitroxyl, hydroxylamine, alkoxyamine or hydroxyalkoxyamine class, and (ii.) a fluorinated polyolefin. Advantageously, a further flame retardant may be added, without the need of adding an antimony synergist. The compositions of the invention combine good flame retardant properties with light stability and good mechanical properties.
Owner:CIBA SPECIALTY CHEM CORP
Polymer inhibition of vinyl aromatic monomers using a quinone methide/alkyl hydroxylamine combination
ActiveUS7651635B1Other chemical processesDistillation purification/separationHydroxylamineQuinone methide
The invention provides a composition of matter and a method of its use in preventing unwanted polymerization reactions. The composition comprises an inhibitor and a retarder. The inhibitor is highly effective. The retarder is reliable under extreme and emergency situations. The inhibitor can be an alkylhydroxylamine. The retarder can be a 7-cyano-quinone methide. The combination of the inhibitor and retarder has been found to be far more effective than expected.
Owner:ECOLAB USA INC
Method of stripping resists from substrates using hydroxylamine and alkanolamine
InactiveUS6242400B1Efficient removalReduce stepsOrganic detergent compounding agentsDetergent mixture composition preparationResistHydroxylamine
A method for removing a resist from a substrate comprising contacting a substrate having a resist coating present thereon with a composition comprising hydroxylamine and at least one alkanolamine which is miscible with hydroxylamine is described. Optionally, the composition may comprise one or more polar solvents. The method is especially suitable for removing a photoresist from a substrate during the manufacture of semiconductor integrated circuits and for removing cured polymer coatings, such as polyimide coatings.
Owner:EKC TECH
Cleaning compositions for removing etching residue and method of using
InactiveUS6140287AImprove stabilityImprove effectivenessInorganic/elemental detergent compounding agentsOrganic detergent compounding agentsHydroxylamineHydroxylamine Hydrochloride
An etching residue remover for cleaning etching residue from a substrate, derived from a mixture of at least hydroxylamine, an alkanolamine which is miscible with said hydroxylamine, water, and, optionally, a chelating agent, wherein the hydroxylamine and the alkanolamine are present in amounts sufficient to clean etching residue from the substrate.
Owner:EKC TECH
Compositions suitable for removing photoresist, photoresist byproducts and etching residue, and use thereof
InactiveUS6951710B2Minimal metal etch rateSemiconductor/solid-state device manufacturingPhotosensitive material processingAmmonium compoundsHydroxylamine
Owner:VERSUM MATERIALS US LLC
Method for quickly starting oxygen-poor ammonia oxidizing biofilter
InactiveCN101830569AQuick changeLow running costBiological water/sewage treatmentHydroxylamineSludge
The invention relates to a method for quickly starting an oxygen-poor ammonia oxidizing biofilter, and relates to a method for biological denitrification of waste water, which comprises the following steps of: (1) inoculating an anaerobic denitrification biomembrane biofilter, and after a denitrification biomembrane is cultured, converting the anaerobic denitrification biomembrane biofilter into an oxygen-poor environment for cultivating oxygen-poor ammonia oxidizing bacteria; (2) taking inorganic carbon NaHCO3 as a carbon source, taking NH4Cl as a nitrogen source of ammonia nitrogen, taking NaNO2 as the nitrogen source of nitrite nitrogen, taking KH2PO4 as a phosphorus source, and controlling the pH value to be alkalescent, wherein the concentration is low-matrix, and the temperature is room temperature; adding hydroxylamine, and inducing and inoculating sludge to be converted towards an oxygen-poor ammonia oxidizing biomembrane; and (3) taking the biofilter as a reactor, and taking ceramsite as filter materials. In the method, the oxygen-poor ammonia oxidizing bacteria are applied to the sewage denitrifying technology to realize the shortest denitrification of nitrogen, so the problems of a large number of required carbon sources and neutralizers, large energy consumption and large sludge producing amount in the conventional biological denitrifying technology are solved.
Owner:SHENYANG JIANZHU UNIVERSITY
6-aliphatic hydrocarbon amido hexyl hydroximic acid collecting agent and preparation and application methods thereof
ActiveCN103301952AImprove flotation recoveryAchieve high flotation separationFlotationReaction temperatureCarboxylic acid
A structural formula of a 6-aliphatic hydrocarbon amido hexyl hydroximic acid collecting agent is represented by a formula (I), wherein R represents C2-C18 aliphatic hydrocarbon group. The preparation method comprises the steps as follows: caprolactam and hydroxylamine hydrochloride or hydroxylamine sulphate are taken as raw materials, methylbenzene is taken as a solvent, the reaction temperature ranges from 80 DEG C to 110 DEG C, the reaction lasts for 1-4 hours, and 6-amino hexyl hydroximic acid is generated; 6-amino hexyl hydroximic acid reacts with C2-C18 fat carboxylic acid at the reaction temperature ranging from 100 DEG C to 160 DEG C for 1-4 hours to generate 6-aliphatic hydrocarbon amido hexyl hydroximic acid, and the product yield can be higher than 91%; and 6-aliphatic hydrocarbon amido hexyl hydroximic acid used in flotation of scheelite, wolframite, tombarthite ore, tin ore, bauxite, titanic iron ore or fluorite ore is taken as the collecting agent, so that the flotation recovery rate can be increased by 3%-10%.
Owner:CENT SOUTH UNIV
Premixed liquid monopropellant solutions and mixtures
Nondetonable, or low detonation sensitivity, substantially nontoxic liquid monopropellants are provided. The liquid propellants are formed from aqueous solutions of solid oxidizers in liquid oxidizers and water soluble liquid fuels and formulated to have a freezing point less than −10° C. Liquid oxidizers may be inorganic or organic aqueous solutions, with hydrogen peroxide being preferred. Preferred solid oxidizers are water soluble nitrates including ammonium dinitramide, aminoguanidine dinitrate, ammonium nitrate, hydroxylamine nitrate, hydrazine nitrate, guanidine nitrate and aminoguanidine nitrate. Preferred liquid fuels are water soluble alcohols, amines and amine nitrates, hydroxyethyl hydrazine, hydroxyethylhydrazine nitrate, cyanoguanidine, guanidines, aminoguanidines, triaminoguanidines, and their nitrate salts, ethanolamine dinitrate, ethylenediamine dinitrate, polyvinyl nitrate, and aziridine.
Owner:AEROJET GENERAL CORP
Semiconductor process residue removal composition and process
InactiveUS7528098B2Efficient removalReduce rateOrganic detergent compounding agentsDetergent mixture composition preparationHydroxylamineGallic acid ester
A residue remover for removing polymeric material and etch residue includes 2-(2-aminoethylamino)-ethanol and optionally another two-carbon atom linkage alkanolamine compound, gallic acid or catechol, water, a polar organic solvent, and hydroxylamine. A process for removing photoresist or other residue from a substrate, such as an integrated circuit semiconductor wafer including titanium metallurgy, includes the steps of contacting the substrate with the above composition for a time and at a temperature sufficient to remove the photoresist or other residue from the substrate. Use of 2-(2-aminoethylamino)-ethanol in the composition and process provides superior residue removal without attacking titanium or other metallurgy on the substrate. The composition preferably has a flash point greater than about 130° C.
Owner:EKC TECH
Method for inhibiting amine degradation during c02 capture from a gas stream
ActiveUS20090205496A1Induce degradationGas treatmentOther chemical processesHydroxylamineSulfite salt
The present application includes a method for inhibiting amine degradation during CO2 capture from flue gas streams. Particularly, the present disclosure relates to a method of inhibiting O2- and / or SO2-induced degradation of amines using sodium sulfite (Na2SO3), potassium sodium tartrate tetrahydrate (KNaC4H4O6.4H2O), ethylenediaminetetraacetic acid (EDTA) or hydroxylamine (NH2OH), or analogs or mixtures thereof during CO2 capture by amines.
Owner:UNIVERSITY OF REGINA
Preparation method of azilsartan intermediate
The invention relates to the technical field of azilsartan intermediate preparation method. According to the invention, a compound 1-[(2'-cyanobiphenyl-4-group)methyl]-2-ethoxy benzimidazole-7-methyl carboxylate is subject to a reaction with an aqueous solution of hydroxylamine, such that the intermediate is prepared. In prior arts, amide impurities with an amount equal to that of the products are generated. With the method provided by the invention, the impurities are greatly reduced, such that the yield is increased. In prior arts, the reaction time is 48 hours, and yet a small amount of raw materials is not reacted. With the method provided by the invention, the reaction time is 24 hours, and the reaction is sufficiently carried out, such that the efficiency is improved. In a post-processing process, complicated steps of acid extraction and alkali ionization are not required. When the reaction id finished, the materials are cooled, and the target product can be precipitated directly.
Owner:SHANGHAI INST OF PHARMA IND
Synthetic method of 5, 5'-bistetrazole-1, 1'-dioxo hydroxyl ammonium salt (TKX-50)
InactiveCN103524444AAvoid purification processEasy to operateOrganic chemistryFiltrationOrganic synthesis
The invention provides a method for preparing 5, 5'-bistetrazole-1, 1'-dioxo hydroxyl ammonium salt (TKX-50), and belongs to the technical field of organic synthesis. The method comprises the steps as follows: step one, glyoxime is prepared, and the yield is 62%; step two, a product obtained in the step one is dissolved in water and concentrated hydrochloric acid, chlorine is introduced at the temperature of 0 DEG C for a reaction for a period of time, and dichloroglyoxime is obtained; and finally, a product obtained in the step two is dissolved in a solvent, and the product and sodium azide have a reaction at the temperature of 0 DEG C for a period of time; after that, the mixture is transferred into diethy ether, and sealed for a reaction at the room temperature overnight after HCl is introduced for a period of time; and after diethyl ether and most HCl gas are volatilized, pH of an aqueous NaOH solution is regulated to be about 8, reflux cooling is performed, filtered and separated solids are dissolved in hydroxylamine hydrochloride to have a reaction for a period of time, and TKX-50 is obtained. According to the method, glyoxal is adopted as a raw material, water is adopted as a solvent for preparation of dichloroglyoxime in the step two, and only direct filtration is required in postprocessing, so that the tedious purification process is prevented, and the cost is reduced; and besides, a target product TKX-50 is synthetized through three steps of reactions, the total yield is up to 34%, the reaction condition is mild, the operation is simple and convenient, and the industrialization is easy to realize.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Nitrite bacteria growth promoter and preparation method thereof
ActiveCN105621625AImprove settlement performanceImprove stabilityBiological water/sewage treatmentBacteroidesHydroxylamine
The invention discloses a nitrite bacteria growth promoter including the components: 40-100 parts by weight, preferably 50-80 parts by weight, of metal salts; 5-30 parts by weight, preferably 10-20 parts by weight, of an amine substance; 0.05-1.5 parts by weight, preferably 0.1-1.0 part by weight, of organic acid hydroxylamine; and 10-40 parts by weight, preferably 20-30 parts by weight, of Na2SO3; the metal salts comprise a calcium salt, a magnesium salt, a ferrous salt and a copper salt, and the molar ratio of Ca<2+> to Mg<2+> to Fe<2+> to Cu<2+> is (5-15) to (5-25) to (1-8) to (0.5-5), preferably (8-12) to (10-20) to (2-6) to (1-4). The promoter has the advantages of simple formula and easy preparation, can be used in the cultivation process of nitrite bacteria, can also be directly added into a sewage treatment system, accelerates starting of short-cut nitrification-denitrification and short-cut nitrification-anaerobic ammonium oxidation processes and achieves stable operation.
Owner:CHINA PETROLEUM & CHEM CORP +1
Device and method for realizing partial short-range nitrification-anaerobic ammonia oxidation by adding hydroxylamine
ActiveCN106865773AAddress serious problemsNo swellingTreatment with aerobic and anaerobic processesHydroxylamineAmmonia-oxidizing bacteria
The invention discloses a device and a method for realizing partial short-range nitrification-anaerobic ammonia oxidation by adding hydroxylamine, and belongs to the field of urban domestic sewage biological treatment. For two-stage partial short-range nitrification-anaerobic ammonia oxidation, the stable operation of the short-range nitrification is crucial to a process; the short-range nitrification is very difficult to start and maintain stably only through process parameter control; a very good nitrite accumulating effect can be achieved by adding the hydroxylamine in the patent; partial short-range nitrification reactors can be started and high nitrite accumulation can be maintained within a short time. The hydroxylamine serves as an intermediate product in a nitrifying process, is a reducing agent of ammonia monooxygenase and a stimulating agent of AOB (Ammonia Oxidizing Bacteria) and can improve the cell yield of the AOB; meanwhile, the hydroxylamine is an inhibiting agent of NOB (Nitrite Oxidizing Bacteria) and can elutriate the NOB. Compared with a conventional denitrogenation process, a partial short-range nitrification-anaerobic ammonia oxidation process can save aeration quantity and carbon source, and is particularly suitable for urban domestic sewage with low C / N.
Owner:BEIJING UNIV OF TECH
Nitrite bacterium culture promoter and preparation method thereof
ActiveCN105624093AImprove settlement performanceImprove stabilityBacteriaTreatment with aerobic and anaerobic processesHydroxylamineFerrous salts
The invention discloses a nitrite bacterium culture promoter, which consists of metal salts, polyamine substances, organic acid hydroxylamine and Na2SO3, wherein in parts by weight, the content of the metal salts is 40-100 parts by weight, preferably 50-80 parts by weight; the content of the polyamine substances is 5-30 parts by weight, preferably 10-20 parts by weight; the content of the organic acid hydroxylamine is 0.05-1.5 parts by weight, preferably 0.1-1.0 part by weight; and the content of the Na2SO3 is 10-40 parts by weight, preferably 20-30 parts by weight; the metal salts include calcium salt, ferrous salt and copper salt; and the molar ratio of Ca<2+> to Fe<2+> to Cu<2+> is (5-15) to (1-8) to (0.5-5), and preferably (8-12) to (2-6) to (1-4). The promoter is simple in formula and easy for preparing; and the promoter can be applied to the culture process of the nitrite bacteria and the promoter can be also directly added to a sewage treatment system, so that the starting of partial nitrification-denitrification and partial nitrification-anaerobic ammonia oxidation processes is accelerated and the stable running of the processes is achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1
F-18 peptides for pre targeted positron emission tomography imaging
InactiveUS20070048217A1Reduce needImprove simplicityIn-vivo radioactive preparationsIsotope introduction to peptides/proteinsHydroxylamineHydrazine compound
F-18 radiolabeled peptides are prepared by reacting a peptide comprising a hydroxylamine, a thiosemicarbazide, a hydrazine or a free amine group with 4-[18F]Fluorobenzaledyde. Specific, non-limiting examples of F-18 radiolabeled peptides are described herein. The labeled peptides are useful, for example, in clinical positron emission tomography.
Owner:IMMUNOMEDICS INC
Preparation method of hydroxamic acid or hydroxamic acid salt
The invention discloses a preparation method of hydroxamic acid or hydroxamic acid salt. The method comprises the steps of adding alkaline into a methanol solution of a hydroxylamine salt under a stirring condition, then, adding organic carboxylic acid methyl ester to react, distilling to recover methanol after the reaction is ended to obtain a product hydroxamic acid salt; or cooling a reaction system after the reaction is ended, adding concentrated sulfuric acid into the reaction system, and distilling to recover methanol to obtain hydroxamic acid. The method can be used for greatly increasing the yield of hydroxamic acid or hydroxamic acid salt; methanol as a solvent can be recycled, so that wastewater is prevented from being generated; in addition, the preparation method is wild in reaction condition and beneficial to industrial production.
Owner:岳阳中科华昂精细化工科技有限公司
Oligonucleotides comprising a non-phosphate backbone linkage
Owner:ALNYLAM PHARMA INC
Nitrifying bacterium culture promoter as well as preparation method and application thereof
ActiveCN105624094AImprove settlement performanceImprove stabilityTreatment with aerobic and anaerobic processesChemical cell growth stimulationHydroxylamineMagnesium salt
The invention discloses a nitrifying bacterium culture promoter, which consists of metal salts, polyamine substances and organic acid hydroxylamine, wherein in parts by weight, the content of the metal salts is 40-100 parts by weight, preferably 50-80 parts by weight; the content of the polyamine substances is 5-30 parts by weight, preferably 10-20 parts by weight; and the content of the organic acid hydroxylamine is 0.5-15 parts by weight, preferably 2-10 part by weight; the metal salts include calcium salt, magnesium salt, ferrous salt and copper salt; and the molar ratio of Ca<2+> to Mg<2+> to Fe<2+> to Cu<2+> is (5-15) to (5-25) to (1-8) to (0.5-5), and preferably (8-12) to (10-20) to (2-6) to (1-4). The promoter is simple in formula and easy for preparing; and the promoter can be applied to the culture process of the nitrifying bacteria and the promoter can be also directly added to a sewage treatment system, so that the rapid growth and reproduction of nitrifying bacteria can be achieved within a short time; and the cultured nitrifying bacteria are high in activity and strong in impact resistance.
Owner:CHINA PETROLEUM & CHEM CORP +1
UV-hardenable dispersions based on polyisocyanates
ActiveUS20080194775A1Good re-emulsifiabilityImprove responsePolyurea/polyurethane coatingsHydroxylamineMeth-
Aqueous UV-hardenable dispersions are provided, as well as their use for the production of coating agents, in particular coatings for ligneous substrates. The dispersions comprise the reaction product of a) one or more polyisocyanates of which at least one polyisocyanate is an oligomeric polyisocyanate of hexamethylene diisocyanate with urethane, biuret, iminooxadiazindione and / or isocyanurate structural units, b) one or more monohydroxy-functional compounds containing (meth)acryloyl groups, c) at least one component c1), which has a hydrophilising effect on the basis of incorporated (potentially) ionic groups and comprises at least one further isocyanate-reactive group and / or at least one component c2) which contains non-ionically hydrophilically acting groups and comprises at least one further isocyanate-reactive group, d) one or more difunctional and / or polyfunctional amines or hydroxyamines as chain extender, and e) optionally other monomeric, oligomeric and / or polymeric substances, which may optionally also contain further unsaturated groups.
Owner:COVESTRO DEUTSCHLAND AG
Modified cellulose material for adsorbing heavy metal ions and organic pollutants and preparation method thereof
ActiveCN104437410ASimple preparation processControllableOther chemical processesWater contaminantsHydroxylamineHydroxylamine Hydrochloride
The invention discloses a modified cellulose material for adsorbing heavy metal ions and organic pollutants and a preparation method thereof. The preparation method comprises the following steps of: by taking cellulose as a raw material, carrying out alkali activation to obtain alkalized cellulose; by taking ammonium ceric nitrate and azodiisobutyronitrile as composite initiating agents, grafting monomer ethyl 2-cyano-3-ethoxyl acrylate to the alkalized cellulose; carrying out amidoximation modification on the alkalized cellulose by adopting a hydroxylamine solution to prepare the modified cellulose material which contains an amidoxime group and a hydroxylamine oxime group. The preparation method disclosed by the invention has the advantages of simple preparation process, easiness for operation control and convenience for batch production, and the raw material is low in cost and easy to obtain; in addition, the modified cellulose material disclosed by the invention can be used for adsorbing the heavy metal ions and the organic pollutants which are contained in waste water.
Owner:扬州市新晟铭通信网络技术有限公司
Process for preparing heterocycles
Process for the preparation of heterocycles by reacting 2-substituted acetals of malondialdehyde with a reactant selected from hydroxylamines and their salts, hydrazines and their salts, formamid, amidines and their salts, guanidines and their salts, aminoguanidines and their salts, nitroguanidine and their salts, O-alkyl-isoureas and their salts, O-cycloalkyl-isoureas and their salts, O-aralkyl-isoureas and their salts, O-aryl-isoureas and their salts, S-alkyl-isothioureas, S-cycloalkyl-isothioureas, S-aralkyl-isothioureas, S-arylisothioureas, S-alkyl-isothiouronium salts, S-cycloalkyl-isothiouronium salts, S-aralkyl-isothiouronium salts, S-aryl-isothiuronium salts, thiourea and urea.
Owner:CREANOVA
Scale inhibitor for styrene rectification system
InactiveCN102070394AInhibition of polymerizationSuppress generationDistillation purification/separationHydrocarbonsHydroxylamineOrganic solvent
The invention relates to a scale inhibitor for a styrene rectification system. The technical problem to be solved by the invention is to inhibit the generation of the scaling matter in the styrene rectification system and disperse the scaling matter adhered to the surface of the equipment so as to prolong the operation cycle of the styrene equipment. The scale inhibitor comprises the following components by weight percent: 5-20% of antioxidant, 5-35% of nitrophenol polymerization inhibitor, 5-35% of hydroxylamine polymerization inhibitor, 5-40% of dispersant and 35-60% of organic solvent.
Owner:浙江杭化科技股份有限公司
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