1939 results about "Hydroxylamine" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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%.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.