68 results about "Organohalogen compounds" patented technology

The invention relates to a piece of degradable food packaging paper and a preparation method of the degradable food packaging paper; the preparation method of the degradable food packaging paper comprises the following steps of preparing konjak sol, preparing slurry, padding, degassing membrane-making and drying, waxing and airing. The preparation method provided in the invention takes konjac glucomannan as main raw material; soy isolate protein and carrageenan are added as accessories; glycerol is used as a plasticizer; without being bleached, the added slurry does not contain carcinogens, such as dioxin, organohalogen compounds and the like; the fiber slurry is porous and has a thick wall, so as to improve air permeability and strength of products effectively; the degradable food packaging paper prepared by the processes, such as sol dissolving, mixing, swelling and smearing edible paraffin wax and the like has the characteristics of safety, no toxicity, environment-friendliness, etc., simultaneously, the mechanical strength is distinctly improved; various added raw materials are in food grade, so that osmosis phenomenon which may happen cannot pollute food; and the degradable food packaging paper can be used as internal package paper for food, such as ice cream, cake, fry, etc.

Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of α-Fe phase and Fe₃O₄ phase, and having a BET specific surface area of 5 to 60 m²/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.

A purifying agent for purifying soil or ground water which comprises a water suspension containing iron composite particles comprising α-Fe and magnetite, and having an average particle diameter of 0.05 to 0.50 μm, an S content of 3500 to 10000 ppm and an Al content of 0.10 to 1.50% by weight, and polyaspartic acid or a salt thereof. The purifying agent is capable of decomposing aliphatic organohalogen compounds or aromatic organohalogen compounds contained in the soil or ground water in an efficient, continuous and economical manner.

Iron composite particles for purifying soil or ground water, comprise an iron component, at least one noble metal selected from the group consisting of ruthenium, rhodium and palladium, and carbon or aluminum, and having a noble metal content of 0.01 to 5.00% by weight and a particle diameter of 0.01 to 1.0 μm. The iron composite particles and the purifying agent according to the present invention are capable of decomposing aliphatic organohalogen compounds such as dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, cis-1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethylene, tetrachloroethylene, 1,3-dichloropropene or the like, and aromatic organohalogen compounds such as dioxins, PCB (polychlorinated biphenyl) or the like, which are contained in soil, ground water or waste water, at ordinary temperature in an efficient and economical manner.

PCT No. PCT/JP96/01107 Sec. 371 Date Oct. 27, 1997 Sec. 102(e) Date Oct. 27, 1997 PCT Filed Apr. 24, 1996 PCT Pub. No. WO96/34034 PCT Pub. Date Oct. 31, 1996A fluorosilicon network polymer prepared by the reaction of a tetraholosilane of the formula 1: SiX4 with an organohologen compound of the formula 2: RZ , an insulating coating prepared therefrom, semiconductor devices coated therewith, and processes for producing the same. In said formulas, R represents at least monofluorinated alkyl or aryl; and X and Z represent each independently boromine, iodine or chlorine.

The invention discloses a Sn-Ag-Cu system lead-free soldering paste, which is characterized by comprising 5-45% (mass) of maleated rosin soldering flux and solder alloy powder mixed with soldering flux, wherein the powder comprises Sn, Ag and 1-8% (mass) of Sb; the solder alloy powder comprises 1.0-4.0% (mass) of Ag, 0.4-1.0% (mass) of Cu, 1-8% (mass) of Sb and the balance of Sn. The solder alloy powder also comprises one of nickel, cobalt and iron, and the total content is lower than 0.5% (mass). The soldering flux comprises more than one kind of haloid acid of which the content is larger than 0-2% (mass), and the use level of organohalogen compound is 0-3% (mass). The Sn-Ag-Cu system lead-free soldering paste has the beneficial effects that the cleaning is avoided, the soldering paste cannot easily change as time goes on, and the soldering paste is suitable for being used for a longer period.

The present invention provides a method and a device, by which it is possible to decompose and treat a large amount of organic halogen compounds, etc. which are environmental pollutants, to a low concentration range at which it is dischargeable as waste liquor to sewage in a short time, and it is also possible to decompose organic substances and nitrogen or phosphorus compounds which are hardly decomposable by oxidation. To a sample solution 20 contained in a reaction vessel 10a in which an aqueous solution containing environmental pollutants is stored, for example, ultrasonic waves 50 are irradiated from a transducer 30a disposed at the central bottom portion of the reaction vessel 10a, and at the same time, ultraviolet rays are irradiated from an ultraviolet lamp 40a disposed at the peripheral edge of the reaction vessel 10a. In this instance, the ultraviolet lamp 40a is disposed at a position such that it does not interfere with the path of travel of ultrasonic waves 50.

A powder-liquid dental curable material kit composed of (A) a liquid material and (B) a powder material, wherein the liquid material (A) contains (a1) a radically polymerizable (meth)acrylic monomer, (a2) an organic halogen compound and (a3) a radical chain transfer agent; the powder material (B) contains (b1) non-crosslinked resin particles, (b2) a pyrimidinetrione compound and (b3) an organic metal compound; and (Z) a peroxide is blended in at least one of the liquid material (A) and the powder material (B). This curable material kit is capable of reducing the heat generation during the curing of a curable material which is a mixture of the liquid material (A) and the powder material (B) and is not susceptible to the excessive prolongation of the curing time even when the curable material is cured by a brush-on technique, thereby ensuring an appropriate curing time for both of a brush-on technique and a kneading technique.

A purifying agent for purifying soil or ground water of the present invention comprises a water suspension containing iron composite particles comprising α-Fe and magnetite, and having an average particle diameter of 0.05 to 0.50 μm, an S content of 3500 to 10000 ppm and an Al content of 0.10 to 1.50% by weight, and at least one additive selected from the group consisting of polymaleic acid, salts of polymaleic acid, sodium hydrogencarbonate and sodium sulfate. The purifying agent of the present invention is capable of decomposing aliphatic organohalogen compounds or aromatic organohalogen compounds contained in soil or ground water in an efficient, continuous and economical manner.

The present invention provides: a catalyst which has more excellent removability upon organohalogen compounds and is suitable for removing the organohalogen compounds from exhaust gases; and a process for removing organohalogen compounds with this catalyst. The catalyst for removing organohalogen compounds comprises titanium oxide (TiO2) and vanadium oxide as catalytic components, and has pores that includes a group of pores having a pore diameter distribution peak in the range of 0.01 to 0.05 mum and another group of pores having a pore diameter distribution peak in the range of 0.1 to 0.8 mum, and this catalyst is characterized by further comprising an oxide of at least one metal selected from the group consisting of manganese, cobalt, nickel, zinc, zirconium, niobium, molybdenum, tin, tantalum, lanthanum and cerium as another catalytic component. The process for removing organohalogen compounds involves the use of this catalyst.

This solder paste can be produced by mixing a flux which comprises a solvent, a rosin, a thixotropic agent and an activator with a solder powder which has a mean particle diameter of 0.1 to 5mum. The solder powder is composed of composite particles, each of which comprises: a core; a first covering layer which consists of a copper-tin intermetallic compound and which covers at least a part of the core; and a second covering layer which consists of tin and which covers all the exposed surfaces of the core and the first covering layer. The core has a single structure which consists of a silver-tin intermetallic compound. The activator contains, relative to 100 mass% of the flux, 0.3 to 0.6 mass% of a hydrohalic acid amine salt and 0.1 to 10 mass% of a compound other than hydrohalic acid amine salts, said compound being an amine, an organohalogen compound, an organic acid, an organic acid ammonium salt, an organic acid amine salt or the like.

The invention provides a treatment device of dioxins atmospheric pollutants in high-temperature flue gas and belongs to a removal method of organic halogen compounds in flue gas. The treatment device is characterized by comprising the following successively-connected devices: a primary intensification combustion furnace (1), a secondary intensification combustion furnace (2), a silicon nitride porous ceramic filter (3), a countercurrent flow heat-exchange waste heat boiler (4), a combined type heat-pipe heat exchanger (5), a filter bag dust remover (6), an acid gas removal system (7), an active carbon adsorption tower (8) and an induced draft fan (9). The treatment device of the dioxins atmospheric pollutants in the high-temperature flue gas is high in waste heat recycling efficiency and is capable of effectively treating the dioxins atmospheric pollutants carried in the process of generating and treating the high-temperature flue gas; all the items of the atmospheric pollutants are lower than the limit values specified in table 4 of GB18485-2014 "Control Standards of Household Garbage Incineration Pollutants"; the emission amount of the dioxins atmospheric pollutants is smaller than or equal to 0.1ngTEQ/m<3>.

The invention relates to a process and a device for decontaminating waters, especially groundwaters, which are heavily and complexly polluted with organic halogen compounds (HHC), in which process the contaminated waters are pre-treated in order to convert low-volatility HHC into more readily volatile components, the halogenated hydrocarbons are subsequently transferred from the aqueous phase to the gaseous phase where complete conversion into halogen-free compounds takes place at elevated temperature by means of catalytic reductive dehalogenation.

The invention relates to an electrolyte for a lithium-air battery or a lithium-copper battery, the electrolyte comprises a lithium salt, an organic solvent and an additive, the additive is an ionic organic halogen compound composed of halogen ions and organic cations, and the molar concentration of the additive in the electrolyte is 0.01-1 mol/L.

The invention provides a treatment method for dioxins atmospheric pollutants in household refuse incineration smoke, and belongs to methods for removing organic halogen compounds in smoke. The method is characterized in that a treatment device is formed by sequentially connecting the following equipment of a primary intensified burning furnace (1), a secondary intensified burning furnace (2), a silicon-nitride porous ceramic filter (3), a countercurrent flow waste heat boiler (4), a combined type heat pipe exchanger (5), a bag dust collector (6), an acid gas removal system (7), an activated carbon adsorption tower (8) and an induced draft fan (9). The treatment method for the dioxins atmospheric pollutants in the household refuse incineration smoke is high in waste heat recovery efficiency and capable of effectively treating the dioxins atmospheric pollutants generated in the household refuse incineration process. All items in the atmospheric pollutants are lower than limiting values regulated in the sheet 4 of the GB18485-2014 household refuse incineration pollutant control standard. The emission of the dioxins atmospheric pollutants is not higher than 0.1 ngTEQ/m<3>.

The invention relates to a treatment device for dioxins air pollutants in household garbage incineration flue gas, and belongs to methods for removing organohalogen compounds in flue gas. The treatment device is characterized by being formed by a primary intensified combustion furnace (1), a secondary intensified combustion furnace (2), a silicon nitride porous ceramic filter (3), a countercurrent flow heat exchange waste heat boiler (4), a combined type heat pipe heat exchanger (5), a bag dust collector (6), an acid gas removal system (7), an activated carbon adsorption tower (8) and an induced draft fan (9), all of which are sequentially connected. The treatment device for the dioxins air pollutants in the household garbage incineration flue gas is high in waste heat recovery efficiency and can effectively govern the dioxins air pollutants generated in the household garbage incineration process. All items of the air pollutants are lower than limiting values specified in table 4 of the Standard for Pollution Control on the Municipal Solid Waste Incineration of GB18485-2014. The quantity of the discharged dioxins air pollutants is smaller than or equal to 0.1 ngTEQ/m<3>.

Provided is a method for producing a cyclic carbonate obtained by reacting epoxide and carbon dioxide, the method being capable of efficiently producing a cyclic carbonate at a high conversion rate and a high yield, in which degradation of the catalyst over time is suppressed and catalytic activity hardly decreases.

A method for producing a cyclic carbonate by reacting epoxide and carbon dioxide in the presence of a quaternary onium salt selected from the group consisting of a quaternary ammonium salt having a halogenated anion as a counter ion and a quaternary phosphonium salt having a halogenated anion as a counter ion, or in the presence of a solid catalyst obtained by immobilizing the quaternary onium salt onto a carrier, wherein an organohalogen compound containing at least one halogen atom in one molecule is added to the reaction system.

The invention discloses a dehalogenase DhmB, an encoding genes and application thereof. The dehalogenase DhmB is a protein in the following (a) or (b); (a) an amino acid sequence is a protein of a sequence 2 in a sequence table; (b) a protein associated with dehalogenation is obtained by the amino acid sequence, which is shown in the sequence 2 of the sequence table and subjected to replacement and/or missing and/or adding of one or a plurality of amino acid residues. The dehalogenase DhmB is easy in purification, good in stability, resistant to high-medium temperature, applicable to the optimum temperature of 65 DEG C, resistant to organic solvents and capable of degrading organohalogen compounds with low-carbon chains, classic pesticides and chemical toxicant and the like and has wide industrial application prospects.

Silanes containing halogen which is bound to silicon are prepared using microwave energy. Silicon is reacted with mixtures of elements or compounds selected from the group consisting of halogen or halogen and organohalogen compounds or halogen and hydrogen or halogen and halogen hydrogen or organohalogen compounds or organohalogen compounds and hydrogen or organohalogen compounds and halogen hydrogen or halogen hydrogen or fluorosilanes and hydrogen, or fluorosilanes and halogen hydrogen or hydrogen containing chlorosilanes and hydrogen or hydrogen containing chlorosilanes and halogen hydrogen or organohalogensilanes and hydrogen or organohalogensilanes and halogen hydrogen or hydro-carbons and halogen hydro-carbons.

A process for treating an organohalogen compound-containing soil or ash of the present invention, comprises: mixing the organohalogen compound-containing soil or ash with an organohalogen compound-decomposition catalyst composed of a composite catalyst comprising an amine compound and iron compound particles, and having an average particle size of 0.01 to 2.0 mum, a phosphorus content of not more than 0.02% by weight, a sulfur content of not more than 0.3% by weight and a sodium content of not more than 0.3% by weight; and having an apparent density (rhoa) of not more than 0.8 g/ml and a catalytic activity capable of decomposing not less than 50% by weight of monochlorobenzene; and heat-treating the obtained mixture at a temperature of 150 to 600 DEG C. The method for treating an organohalogen compound-containing soil or ash in order to effectively decompose dioxins and dioxin precursors such as aromatic organohalogen compounds or aliphatic organohalogen compounds, e.g., trichloroethylene and dichloromethane, which are contained in the soil or ash.

Disclosed is an agent for decomposing an organic halogen-containing compound, which comprises an iron powder being composed of flat iron particles having a planar ratio of 2 or more. Further, disclosed is an agent for decomposing an organic halogen-containing compound which comprises a copper salt-containing iron powder being composed of iron particles having a copper salt adhered thereto wherein flat iron particles having a planar ratio of 2 or more have copper particles being finer than the iron particles adhered to the surface thereof.