191 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.

Treating solution for surface treatment of metal to treat one metal material selected from the group consisting of ferriferous material, zinciferous material, aluminiferous material and magnesiferous material or to treat two or more metal materials selected from the group consisting of ferriferous material, zinciferous material, aluminiferous material and magnesiferous material at the same time, wherein the aqueous surface treating solution contains from 5 to 5000 ppm of at least one compound selected from the group consisting of zirconium compound and titanium compound by the metal element, and from 0.1 to 100 ppm of free fluorine ion, further the pH of the treating solution is from 2 to 6. To the treating solution, calcium compound, magnesium compound, strontium compound, nitric acid group, oxygen acid and / or salt of oxygen acid, polymer compound and surface active agent can be added.

Compositions and methods are provided for preparing a metal substrate having a uniform textured surface with a plurality of indentations with a diameter in the nanometer and micrometer range. The textured surface is produced by exposing the substrate to an etching fluid comprising a hydrohalic acid and a mixture of a hydrohalic acid and an oxyacid, a chloride containing compound, and an oxidant. The etching solution can be used at ambient temperature. This textured surface enhances adherence of coatings or cells onto the textured surface, improves the retention of proteins on the surface, and encourages bone in-growth.

A flame-retardant resin composition comprises a base resin (e.g., a polyester-series resin), a flame retardant (A) comprising a salt of an amino group-containing triazine compound with a sulfuric acid and / or a sulfonic acid, a flame-retardant auxiliary (B). The flame-retardant auxiliary (B) includes an aromatic resin, acyclic urea-series compound or a derivative thereof [e.g., acetyleneurea, uric acid, a salt of melamine or a condensate thereof (e.g., melam, melem, and melon) with cyanuric acid], an amino group-containing triazine compound (e.g., melamine or a condensate thereof), and / or an inorganic metal-series compound (e.g., a metal salt of an oxygen acid having no sulfur atom, a metal oxide, a metal hydroxide, and a metal sulfide). The present invention provides a flame-retardant resin composition to which flame retardancy is imparted without using a halogen-series flame retardant and an organic phosphorus-series flame retardant.

The invention relates to a chromium-free, corrosion prevention treatment for steel, zinc or zinc alloys, aluminum, magnesium or alloys thereof in which the metal surfaces are contacted in a first step with a first aqueous solution having a pH of 1.5 to 5 which contains Ti and / or Zr and / or Si ions and at least such a quantity of fluoride that the atomic ratio of Ti to F and / or Zr to F and / or Si to F is in the range from 1:1 to 1:6 and then, optionally after rinsing with water, and thereafter in a second step are contacted with a second aqueous solution having a pH of 1.5 to 5 which contains Ti and / or Zr and / or Si ions and at least such a quantity of fluoride that the atomic ratio of Ti to F and / or Zr to F and / or Si to F is in the range from 1:1 to 1:6, and which additionally contains such a quantity of soluble anions of oxo acids of Mo (VI) and / or W (VI) that the total concentration of molybdenum and / or tungsten is in the range from 5 to 1500 mg / l.

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.

A flame-retardant resin composition comprises a base resin (e.g., a polyester-series resin), a flame retardant (A) comprising a salt of an amino group-containing triazine compound with a sulfuric acid and / or a sulfonic acid, a flame-retardant auxiliary (B). The flame-retardant auxiliary (B) includes an aromatic resin, acyclic urea-series compound or a derivative thereof [e.g., acetyleneurea, uric acid, a salt of melamine or a condensate thereof (e.g., melam, melem, and melon) with cyanuric acid], an amino group-containing triazine compound (e.g., melamine or a condensate thereof), and / or an inorganic metal-series compound (e.g., a metal salt of an oxygen acid having no sulfur atom, a metal oxide, a metal hydroxide, and a metal sulfide). The present invention provides a flame-retardant resin composition to which flame retardancy is imparted without using a halogen-series flame retardant and an organic phosphorus-series flame retardant.

Pharmaceutical compositions for long-term sustained release of bisphosphonate drugs are provided. In one embodiment, the composition includes an aqueous suspension of a solid which includes a salt of a bisphosphonate drug and a salt of pentavalent phosphorus oxoacid. The compositions can be used to treat a variety of bone diseases, including osteoporosis.

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.

A gas generating composition for air bags to be used as occupant crash protection systems in automobiles, which is less toxic or dangerous, can be easily handled, has a high combustion efficiency and a high gas generation efficiency, produces few residue during combustion, can be safely manufactured and exhibits a high molding strength in the molding step; and a molded article thereof. The invention provides a gas generating composition containing (a) a fuel comprising at least one polymer compound selected from polyacrylic polymer compounds, polyacetal, urea resins, melamine resins, ketone resins and cellulose-based polymer compounds; (b) an oxidizing agent selected from ammonium nitrate and phase-stabilized ammonium nitrate; and (c) at least one combustion accelerator selected from oxyacid salts such as metal nitrates, metal nitrites, perchlorates and chlorates; a molded article thereof; and an inflator for air bags with the use of the same.

The invention discloses a preparation method of an adsorbing material for removing anions in water and application of the adsorbing material, and belongs to the technical field of sewage purificationtreatment in environmental protection. A chitosan acetic acid solution is taken as a material, liquid paraffin is taken as an organic dispersion medium, glutaric dialdehyde is taken as a crosslinkingagent, and a crosslinking chitosan microsphere is obtained through an emulsion crosslinking method. A crosslinking chitosan microsphere adsorbing agent prepared by adopting the method has good adsorption performance and cyclic utilization performance to iodine ions. Furthermore, the adsorbing agent also can adsorb other halide ions and oxyacid radical-containing ions and has great adsorption capacity. The adsorbing material prepared by the preparation method disclosed by the invention provides a new technical reference for removing anions in wastewater and has good recovery and cyclic utilization effects. The raw materials required for the adsorbing material are natural, nontoxic, universal and easily available, and the adsorbing material is low in price, simple in preparation process, high in treatment efficiency, short in treatment period and convenient for regenerated treatment and is an effective adsorbing agent for treating anions in wastewater.

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 Phosphor / TiO2 photocatalyst which has high thermal stability and the corresponding preparation method. The photocatalyst can be prepared though a method comprising the following steps: 1) a solution which contains the precursor of inorganic titanium salt and phosphorated compound is prepared, then a precipitant is added into the solution which contains the precursor of inorganic titanium salt and phosphorated compound until the pH value reaches to 4-8, and a solid is obtained by aging and filtering; 2) the solid obtained form the step 1) is dried and calcined to get the phosphor / TiO2 photocatalyst; the precursor of inorganic titanium salt is the random combination of one or more of TiCl4, TiCl 3, TiOCl 2, Ti(SO4)2 and TiOSO4; the phosphorated compound is phosphorated oxy acid and / or phosphorated oxysalt. The photocatalyst of the invention has no polymorphic transformation after being calcined under high temperature, maintains high photocatalitic activity under ultraviolet and visible light, and can be used in the degeneration of the pollutant in industrial effluent and the reparation of wall paint or wall brick paint film which have antibiotic and air purifying effects.

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 process of the present invention produces a hydroxylactone by subjecting an unsaturated carboxylic acid having a double bond not conjugated to a carboxyl group or an ester thereof to (i) a reaction with hydrogen peroxide in the presence of a metallic compound containing a metallic element selected from W, Mo, V and Mn or (ii) a reaction with a peroxide containing the metallic element to thereby yield a corresponding hydroxylactone having a hydroxyl group combined with one of carbon atoms constituting the double bond and being cyclized at the other carbon atom position. The metallic compound may be one selected from oxides, oxoacids and salts thereof. The unsaturated carboxylic acid includes, for example, β,γ-unsaturated carboxylic acids, γ,δ-unsaturated carboxylic acids, and δ,ε-unsaturated carboxylic acids. The process can produce hydroxylactones in high yields at low cost.

To provide a process capable of producing an aldehyde with a 2-position branched long-chain alkyl with high yield and high selectivity. The process for producing an aldehyde with a 2-position branched long-chain alkyl represented by the following general formula (2) contains: using a 2-position branched epoxide represented by the following general formula (1) as a raw material; and subjecting the epoxide to acid rearrangement reaction with a polyacid of a metallic oxoacid as a catalyst. In the formulae, n represents an integer of from 5 to 17.

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 present invention relates to novel D-amino acid oxidase isolated and purified from Candida intermedia, a gene encoding the D-amino acid oxidase, a recombinant plasmid containing the gene, and a transformant into which the D-amino acid oxidase gene has been introduced, as well as a production method of D-amino acid oxidase including culturing the transformant. Moreover, the present invention relates to a production method of L-amino acids, 2-oxo acids or cyclic imines, which include reacting racemic amino acids with the D-amino acid oxidase, more preferably, a production method of L-amino acids, which includes reacting racemic amino acid with the D-amino acid oxidase, amino acid dehydrogenase and an enzyme having a coenzyme-regenerating activity. According to the present invention, L-amino acids, 2-oxo acids or cyclic imines can be produced with good efficiency in an industrial scale.

This invention relates to compositions which are capable of sequestering calcium ions and are derived in part from renewable carbohydrate feedstocks. The calcium sequestering compositions are mixtures containing one or more hydroxycarboxylic acid salts, one or more oxoacid anion salts, and one or more citric acid salts.

[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 present invention discloses one kind of composite MoS2 and Ni-P depositing liquid for treating the friction surface of micro machine. The composite MoS2 and Ni-P depositing liquid includes soluble tetrathiomolyadate, soluble Ni salt, soluble oxasalt of P and water. The molar ratio between soluble tetrathiomolyadate and soluble Ni salt is 0.01-0.5, that between soluble oxasalt of P and soluble Ni salt is 0.01-30, and that between soluble Ni salt and water is 1-100 to 5000. The electric deposition process of utilizing the composite depositing liquid to treat surface of machine part is also disclosed and includes the steps of surface cleaning treatment of the machine part, setting the surface in the depositing liquid inside electrolytic bath, connecting the part with cathode of the power source, applying current in 0.1-100 mA / sq cm for 1-120 min, cleaning the part, drying and maintaining the temperature in protecting atmosphere.

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.