181 results about "Oxoacid" patented technology

Methods for solubilizing algae or algal material are provided to facilitate the recovery of oil or lipids, as well as hydrocarbons and carbohydrates, from algae or algal material. The methods involve contacting algae or algal material with an oxoacid ester or thioacid ester of phosphorus or a mixture of an oxoacid of phosphorus and/or an alcohol to form a mixture thereof under conditions effective to solubilize the algae or algal material. These methods optionally further comprise bioconversion of the solubilized algae or algal material to form a composition suitable for recovery of oils and non-oil chemicals.

The present invention is directed toward a method of solubilizing coal. The method includes providing coal and providing an oxoacid ester of phosphorus or a mixture of an oxoacid of phosphorus and an alcohol. A blend of the coal, the oxoacid ester of phosphorus or the mixture of the oxoacid of phosphorus and alcohol is formed. The blend is then treated under conditions effective to solubilize the coal.

The invention relates to magnesium alloy anodic oxidation electrolyte and anodic oxidation method under arc inhibiting state. The electrolyte is used water as solvent; and its component are 75-150g/L organic amine, 6-12g/L inorganic phosphatic and boron compounds, 1-4g/L organic carboxylate, 2-5g/L fluoride, 4-10g/L metal oxysalt. Its feature is that the magnesium alloy anodic oxidation surface do not happen spark discharge in high oxidation pressure and oxidation peak current parameter. And it has the advantages of low solution toxicity, fast film forming, safe and simple operation, and low cost. The formed anodic oxide film is smooth and compact, has high hardness, and can increase magnesium and its alloy corrosion resistance. The film can be used as magnesium alloy protective layer and other coating foundation base.

Electrolytic stripping solutions, which incorporate the novel use of oxoacids and/or oxoacid salts, and hydrogen peroxide, have been formulated for the rapid removal of electroless nickel from iron, steel, aluminum, and titanium alloys as well as other selected electrically conductive substrates. The formulations provide improved resistance to etching of the substrate and can be formulated to be free of chelates, chromates, nitrates, or concentrated acid solutions thereby increasing worker safety and reducing the cost of waste disposal of spent stripping solutions.

The present technology is directed to prodrugs and compositions for the treatment of various diseases and/or disorders comprising methylphenidate, or methylphenidate derivatives, conjugated to at least one alcohol, amine, oxoacid, thiol, or derivatives thereof. In some embodiments, the conjugates further include at least one linker. The present technology also relates to the synthesis of methylphenidate, or methylphenidate derivatives, conjugated to at least one alcohol, amine, oxoacid, thiol, or derivatives thereof or combinations thereof.

An acidic chromium-free solution for treating a metal surface containing: a vanadium cation source and/or a vanadyl cation source; an organic acid as an anion source; and at least one oxoacid as another anion source is provided. The oxoacid is selected from oxoacids of nitrogen, sulfur, phosphorus, boron, and chlorine. A metal component composed of, for example, aluminum or magnesium is brought into contact with the chromium-free solution to form a vanadium coating film of a surface of the metal component. A surface treating process using this chromium-free solution is useful for formation of a coating film having low corrosion resistance and low electric resistance.

The invention provides a ZSM-35 molecular sieve and a preparation method thereof. The ZSM-35 molecular sieve is an aggregation-state ZSM-35 molecular sieve with a macroporous-mesoporous-microporous composite hierarchical pore structure. The raw materials of the preparation method do not contain organic template agents and seed crystals, the preparation method comprises the following steps: preparing a reactant gel, wherein the molar ratio of SiO2, Al2O3, Na2O, K2O, oxygen-containing acid group and H2O is (20-40):1.0:(1.5-2.0):(4.0-6.5):(1.0-4.0):(600-1200); performing aging treatment and crystallization treatment on the reactant gel in sequence, and washing and drying the obtained synthetic product. The ZSM-35 molecular sieve provided by the invention can be synthesized on the premise of not using the organic template agent and the seed crystal, in addition, due to the hierarchical pore structure, diffusion and mass transfer of materials are facilitated.

The invention discloses a graphene composite flame-retardant material and a preparation method thereof. The graphene composite flame-retardant material comprises the following raw materials in parts by weight: 30-50 parts of modified graphene and 10-15 parts of a flame-retardant additive, under the action of 1-hydroxyl benzotriazole, amino of the flame-retardant additive and carboxyl of the modified graphene carry out condensation, so that flame-retardant additive molecules are fixed on the surface of the modified graphene, thereby obtaining the graphene composite flame-retardant material. According to the graphene flame-retardant material, oxygen-containing acid of phosphorus catalyzes a hydroxyl-containing compound to be dehydrated into carbon, then a coke layer is generated on the surface of the material, the coke layer can isolate oxygen and heat to extinguish flame, meanwhile, little smoke is generated when the material is combusted, and the flame-retardant performance of the material cannot be reduced due to long-time use.

A biotransformation process for preparing chiral aromatic-hydroxy ketones in high yields is described, using 2-hydroxy-3-oxoacid synthase, such as AHAS or TSAS. Optionally substituted arylaldehydes and -oxoacids react in this process to provide pure enantiomers, useful as synthons in the production of various drugs, an example being (R)-phenylacetyl carbinol.

An etchant and a method for roughening a copper surface each capable of permitting copper with roughened surface which exhibits acid resistance and permits a copper conductive pattern and an outer layer material to be firmly bonded to each other therethrough in manufacturing of a printed wiring board to simplify the manufacturing. The etchant may contain an oxo acid such as sulfuric acid, peroxide such as hydrogen peroxide and an auxiliary component such as an azole and chlorine. The azole may comprise benzotriazole (BTA). The chlorine may be in the form of sodium chloride (NaCl). The etchant permits a copper surface to be roughened in an acicular manner.

[Problem] Provided is a method for regenerating a catalyst, the method decreasing the SO₂ oxidation rate, which has been increased by Fe and V compounds, of a spent denitration catalyst to an extremely low level, and improves the oxidation activity of the catalyst for metal mercury by the regeneration treatment.

[Solving Means] A method for regenerating a catalyst, including steps of immersing a spent denitration catalyst composed mainly of titanium oxide in (a) a mixed aqueous solution containing phosphate ions and oxo-acid ions of one or more elements selected from vanadium (V), molybdenum (Mo), and tungsten (W), (b) a heteropoly acid compound aqueous solution containing phosphorus and one or more elements selected from V, M, and W, or (c) a mixed aqueous solution containing a phosphate compound and a vanadyl compound, and then drying the catalyst.

The homogeneous catalyst system for catalyzing decomposition of oxygen releasing agent hydrogen peroxide includes oxo acid, oxo salt or peroxy acid complex of VIb metal; iodine, hydroiodic acid or its salt; and alkali cocatalyst hydroxide, strong base-weak acid salt or organic base compound. The composite catalyst system is used in the decomposition of oxygen releasing agent hydrogen peroxide and can reach unexpected effect. It has high catalytic activity, smooth oxygen release, capacity of forming homogeneous solution with water, reuseability, long shelf life and environment friendship.

The invention discloses a method and catalyst for preparing adipic acid. With metal oxyacid of tungsten or molybdenum or salt thereof as a catalyst and aqueous hydrogen peroxide solution with the mass fraction of 30-50% as an oxidizer, catalytic oxidation is carried out on 6-hydroxyl adipic acid or epsilon-caprolactone or mixture of the 6-hydroxyl adipic acid and the epsilon-caprolactone to synthesize the adipic acid under the conditions that a reaction temperature is 50-150 DEG C, reaction time is 1-15 times, molar ratio of raw material to hydrogen peroxide is 1: (1-10) and mass ratio of the raw material to the catalyst is (20-200): 1. The adipic acid is prepared from the 6-hydroxyl adipic acid or the epsilon-caprolactone as the raw material, no organic solvent is used in a preparation process, and no nitric acid is used, so that environmental pollution is reduced; and the oxidant is hydrogen peroxide, the catalyst is polyoxometallate, and no toxic gas is discharged in a reaction process, yield of the apidic acid is high and activity of the catalyst is high.

The invention provides a phosphorus binding agent with a MOFs structure and a preparation method and application thereof. The preparation method comprises the following steps of: cationizing the surface of a metal-based organic framework material to obtain the phosphorus binding agent with the MOFs structure. According to the preparation method, a functional group is introduced into an organic ligand or an active component is introduced by using the MOFs as a subjective environment; for example, Lewis acid sites rich in the surface of the MOFs can be used as an inorganic oxyacid root anion toprovide ideal coordination adsorption sites so as to synthesize the cationized MOFs material, and the prepared cationic MOFs material with cationic degree of 25-35% has the characteristics of no toxicity, good biocompatibility and the like; and the prepared cationic MOFs material can be combined with phosphate ions to reduce the phosphorus content in a human body so as to treat hyperphosphatemia.

The invention discloses framework modified sepiolite as well as a preparation method and an application thereof. The method comprises steps as follows: single-fiber sepiolite is obtained after sepiolite is subjected to acidification treatment and dissociation with an inorganic acid solution, and then subjected to hydrothermal modification with trivalent inorganic salt or oxyacid salt; filtration, separation and drying are performed after treatment, and framework modified sepiolite is obtained. The modified sepiolite regulates surface activity sites and pore canal ion exchange characteristics by regulating the stoichiometric ratio of framework doping atoms and counterions as well as the type of the doping atoms and the counterions to improve the absorption performance. The modified sepolite can efficiently adsorb organic pollutants in paper wastewater, sepiolite with the organic pollutants adsorbed can enter a paper pulp system after being separated from water, the utilization rates of pigments and adsorbent materials are increased, and efficient recycling of resources is formed.

The invention discloses a veneer base plate with sound insulation and flame retardant effects. The veneer base plate is prepared from the following raw materials in parts by weight: 50-60 parts of diatomite, 10-15 parts of cement, 5-8 parts of silicon powder, 3-5 parts of a flame retardant, 5-8 parts of glass fibers, 5-8 parts of sepiolite fibers, 5-8 parts of basalt fibers, 10-15 parts of bentonite and 30-40 parts of water. A large number of porous fibers are added, so that the veneer has a very good sound insulation effect, an intermediate 6 and cyanuric chloride are reacted to prepare a flame retardant, oxyacid of phosphorus contained in the flame retardant catalyzes a hydroxyl-containing compound to be dehydrated into carbon during combustion of the veneer, and then a coke layer is generated on the surface of a material. The coke layer can insulate oxygen and heat so as to extinguish flames and prevent the flames from spreading.

The invention discloses a chromium-free passivation solution for the surface of a hot-dip zinc-aluminum-magnesium steel plate and a preparation method of a hot-dip zinc-aluminum-magnesium chromium-free passivation plate, and belongs to the technical field of hot-hip zinc-aluminum-magnesium steel plates. The passivation solution is prepared from, by weight, 5-15 parts of silicate, 10-50 parts of strong oxidizing acid group ion containing compound, 5-30 parts of organic acid salt, 150-450 parts of waterborne polyurethane emulsion and 0.1-10 parts of a defoaming agent. The coating of the hot-dipzinc-aluminum-magnesium steel plate is prepared from, by weight, 1%-5% of Al, 0.2%-3% of Mg, 0%-0.3% Si and the balance Zn. After the passivation solution is used for hot-dip zinc-aluminum-magnesium steel plates, the steel plate has excellent environmental protection performance, coating property, corrosion resistance, blackness resistance, fingerprint resistance and water resistance.

The present invention provides a galvanized steel sheet including: a steel sheet; and a galvanizing layer provided on a surface of the steel sheet; wherein the galvanizing layer includes an amorphous coating layer having an inorganic oxoacid salt and metallic oxide on a surface layer of the galvanizing layer; the galvanizing layer includes a ζ phase and a δ₁ phase; the galvanizing layer includes, by mass, 8 to 13% of Fe; Zn in the metallic oxide exists up to an outermost surface layer of the amorphous layer; and an X-ray diffraction intensity ratio I, which is obtained by dividing an X-ray diffraction intensity of the ζ phase at d=0.126, after removing background intensity, by an X-ray diffraction intensity of the δ1 phase at d=0.126, after removing background intensity, is 0.06 to 0.35.