79 results about "Polychlorinated Dibenzo-p-dioxins" patented technology

Two (or more), -component, body-implantable, absorbable, biocompatible, putty, and non-putty hemostatic tamponades for use in surgery. Component 1 is a finely powdered bulking material, preferably less than 50 microns, e.g. the calcium, magnesium, aluminum, or barium salts of saturated or unsaturated carboxylic acids containing about 6 to 22 carbon atoms, hydroxyapatite, DBM, polyglycolide, polylactide, poldioxinones, polycaprolactones, absorbable glasses, gelatin, collagens, mono, and polysaccharides starches. Component 2, a dispersing vehicle, may be esters of C8-C18 monohydric alcohols with C2-C6 aliphatic monocarboxylic acids; C2-C18 monohydric alcohols with polycarboxylic acids; C8-C30 monohydric alcohols; tocopherol and esters thereof with C2-C10 aliphatic monocarboxylic acids or polycarboxylic acids; absorbable 10-14C hydrocarbons; free carboxylic acids such as oleic, capric, and lauric; dialkyl ethers and ketones; alkyl aryl ethers and ketones, polyhydroxy compounds and esters and ethers thereof; (ethylene oxide / propylene oxide copolymers), oils e.g. olive oil, castor oil and triglycerides.

A method and apparatus for heat treating of hazardous waste by heating the waste in a pyrolyzing chamber and forming an off-gas, heating the off-gas for a sufficient time to destroy dioxins and furans, then reducing and cooling the off-gas in a secondary treating chamber having a graphite stack and recovering metallics by distillation.

The present invention is directed to crystal forms of the 5-HT2C agonist (S)-(8-(2,6-dichlorophenyl)-6-fluoro-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanamine hydrochloride, as well as compositions, processes of preparation, and uses thereof.

The invention relates to a filter material integrating dust removal and dioxin decomposition and a preparation method thereof. The filter material comprises a supporting catalyst layer, a base cloth layer and a supporting layer. One side of the base cloth layer is arranged at one side of the supporting catalyst layer, and the other side of the base cloth layer is arranged on the supporting layer; the supporting catalyst layer is formed by stacking and covering a catalyst layer on the catalytic supporting layer. The preparation method is as follows: stacking, needling and post treatment, and the like, are carried on a polytetrafluoroethylene microporous membrane with a dioxin decomposition catalyst, a high temperature resistant fiber supporting layer and the base cloth layer to obtain the filter material. The preparation method has the advantages of simple and practical process, low machining cost and little fiber damage. The filter material can be widely used for dust removal and dioxin decomposition in high-temperature tail gas.

Provided is an unbleached paper product made from grass type pulp, the unbleached paper product has a brightness of 35-60% ISO, the grass type pulp is unbleached. The unbleached paper product includes an unbleached toilet paper, an unbleached hand towel, an unbleached wiping paper, an unbleached duplicating paper, an unbleached meal container, an unbleached food wrapping paper and an unbleached printing paper. The paper products have a high intensity and have no detection of dioxin and absorbable organic halides in the harmful substance detection test.

A method is provided for the removal of polychlorinated contaminants including polychlorinated dioxins, furans, byphenyls, and polycyclic aromatic hydrocarbons from marine oils by a process that minimizes processing of the oil, and the degradation of polyunsaturated fatty acids. Also provided are marine oils such as cod liver oil obtained by the method of the invention than can be used otherwise unrefined as a source of economical, contaminant-reduced bulk marine oil.

The catalyst for removing dioxin-type halogenated aromatic compounds of the invention is a catalyst which adopts titanium dioxide and carbon nanotubes as carriers and vanadium and a transition metal as active ingredients; the weight percent of the components is as follows: 0.1-6% of vanadium, 1-15% of transition metal, 0.1-10% of carbon nanotubes and the allowance titanium dioxide; wherein, the transition metal is Mn, Fe, W, Co, Ni, Cu, Cr or Mo. The catalyst of the invention contains no noble metal, the raw materials are accessible, binary carriers are used to increase the surface area the catalyst and the conversion rate for removing the dioxin-type halogenated aromatic compounds is high; high energy ball milling method is adopted in preparation method, the production process and the devices are very simple, the preparation method has no pollution, the catalyst is applicable to the industrialized mass production and is easily commercialized.

The invention relates to a method for preparing polyfluortetraethylene fiber with dioxin decomposition function. The method comprises the following steps: firstly, polyfluortetraethylene emulsion is adopted to carry out surface modification on dioxin decomposition catalyst powder; then, the polyfluortetraethylene resin powder and the modified catalyst powder are mixed, and are mixed with liquid lubricant to process the polyfluortetraethylene fiber through extruding, rolling, vertical stretching, sintering, molding, fiber opening and other processes. The method can effectively avoid loss of catalyst powder in the fiber during using. The fiber material can be widely applied to the dust-removal and waste gas decomposition of high-temperature tail gas. Compared with the prior art, the method has the advantages of simple and easy process, low manufacturing cost, non pollution and the like.

A principal object of the present invention is to provide low-cost techniques for readily detecting or quantifying dioxins using substances which are inexpensive and can be easily produced, and extracting dioxins using such substances. Dioxin binding peptides of the present invention are highly selective to dioxins, and are therefore capable of detecting or quantifying dioxins in test samples containing impurities. Dioxin binding peptides of the present invention are also capable of selectively extracting dioxins from impurity-containing test samples, and are therefore useful in simple pretreatment for quantifying and analyzing dioxins.

Belonging to the technical field of flue gas denitration, the invention relates to a preparation method of a dioxin removal and denitration catalyst. The method comprises the steps of: pretreatment; mixing of titanium dioxide and tungsten trioxide active components; ball milling and mixing; and finished product drying. The technical scheme realizes recycling of a hydrogenation catalyst, and converts it into the catalyst for dioxin removal and denitration, avoids the environmental pollution caused by direct emission, and lowers the making cost of the dioxin removal catalyst. The invention also relates to the dioxin removal and denitration catalyst prepared by the method. In the technical scheme, all components of the catalyst form an Mo-V-Ni-W / TiO2-Al2O3 system to realize denitration function under the action of active components Mo, V, Ni, W and the carrier TiO2-Al2O3. Also, by means of the V-W-Ti-Mo system composed by transition metals, dioxin can be well decomposed into HCl, CO2 and H2O. Therefore, the catalyst integrates the functions of dioxin removal and denitration, and has significant effect.

The invention discloses an integrated garbage treatment and utilization method for effectively controlling dioxin, which comprises a garbage sorting, drying and storing method, a garbage dry distillation, pyrolysis and gasification method, an integrated treatment and utilization method for garbage ash and combustible gas and an integrated treatment and utilization method for exhaust gas and wastewater, belonging to the field of environmental protection. The method comprises how to effectively control the dioxin and solve the pollution problem of reducing waste water, exhaust gas, waste residue and the like in the garbage treatment process. The solution comprises the steps of sorting and drying the garbage, turning the garbage into renewable resources like combustible gas, tar and the like through integrated treatment of dry distillation, pyrolysis and gasification, comprehensively utilizing the waste residue and waste water for brick making and emitting the exhaust gas up to the standard after treatment. By adopting the technique for garbage treatment, the generation and damage of the dioxin can be effectively controlled, the emission of no waste water, no waste residue and no wastes can be achieved, and the better effect of complete harmlessness, reduction and recycling approximate to 100% can be realized.

The invention relates to a liquid phase method for removing dioxin-like compounds from flue gas and a device thereof. The invention is used for solving the problem of the dioxin-like compound removal in the incineration flue gas, which utilizes an absorbent to absorb the dioxin-like compounds in the flue gas in a jet bubbling reactor at the temperature of 50-120 DEG C and finish the purification process; the absorbent consists of an absorption liquid and an additive and the absorption liquid is the mixing solution of sodium chlorite and sodium hypochlorite, wherein the concentration of NaClO2solution is 0.01M to 0.1M per liter and the concentration of NaClO solution is 0.01M-0.08M per liter. The additive is one of calcium hypochlorite, sodium bicarbonate, hydrogen peroxide or disodium hydrogen phosphate and the dosage of the additive is 0.001M-0.05M per liter. The invention has removal rate of 94 percent to 98 percent and absorbent utilization ratio higher than 97 percent and is characterized by high removal efficiency, low investment and operation cost, simple device, stable operation, convenient use and the like.

The invention provide a technique for the treatment of harmful substances by which the inhibition of soil or ash containing lead, cadmium, mercury, hexavalent chromium, selenium and / or arsenic in a high concentration from dissolving and the decomposition of organochlorine compounds such as trichloro- ethylene, polychlorinated dibenzo-p-dioxins and PCB into harmless substances can be attained economically and effectively. The invention relates to an encapsulating agent which contains sulphide iron ore and an activator and which may further contain soft-burned magnesia, cement, quicklime, slakedlime, magnesium carbonate, limestone, dolomite and / or alkali silicates. The encapsulating agent makes it possible to conduct reliably and economically the inhibition of lead, cadmium, mercury, hexavalent chromium, selenium and / or arsenic contained in soil or ash from dissolving and the decomposition of organochlorine compounds such as trichloroethylene, polychlorinated dibenzo -p-dioxins and PBCinto harmless substances. The encapsulating agent is also favorably usable as an encapsulating agent or blowing agent for incineration ash containing lead, hexavalent chromium, or the like in a high concentration. The soil or incineration ash encapsulated with the agent is in a harmless and firmly hardened state and therefore permits safe recycling.

The invention provides an adding method and a device of an inhibitor used for reducing generation of dioxin in sintering process. According to the adding method, two stage mixing is adopted for adding of the inhibitor. The adding method comprises following steps: first stage mixing is carried out, wherein an inhibitor solution is delivered into a solution conveying system, conveying amount is controlled by a flow amount control device, and the inhibitor solution is uniformly mixed in a sintered pellet system or a coke blending system; another time of mixing is carried out, wherein the sintered pellets mixed with the inhibitor solution or coke powder mixed with the inhibitor solution and a sinter mixture are delivered into a sintering material mixer for another time of mixing; and at last an obtained sintering material is delivered into a sintering machine for sintering. Fine control on the inhibitor used for reducing generation of dioxin is carried out, and adding amount of the inhibitor solution is controlled to range from 0.005 to 0.01%, so that generation of dioxin is reduced, and at the same time unfavorable influences on sintered ore quality and sintering equipment caused by excessive adding of urea are avoided.

A composition and method for extracting, recovering, removing, and / or reducing at least one harmful compound selected from a harmful polycyclic aromatic hydrocarbon (PAH), bisphenol A (BPA), a harmful phthalate, a harmful polychlorinated biphenyl (PCB), a harmful dioxin, a harmful hexachlorobenzene, or a harmful organotin from a harmful compound-containing material using harmful compound-extracting composition comprising a turpentine fluid.

The present invention relates to a compound of the general formula (I) wherein Het is an optionally substituted 4-, 5-, 6- or 7-membered heterocyclic ring having at least one nitrogen atom; R1 is hydrogen, hydroxy, C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl or C2-C4 alkynyl; R2 and R3 is each and independently selected from hydrogen, C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 alkoxy, halogen and cyano, provided that R2 and R3 may not both be hydrogen; R4 is C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl or C2-C4 alkynyl; Ar is an optionally substituted aromatic ring system selected from pyridinyl; 1-naphthyl; 5,6,7,8-tetrahydro-1-naphthyl; quinolinyl; 2,3-dihydro-1,4-benzodioxinyl; 1,3-benzodioxolyl; 5,6,7,8-tetrahydroquinolinyl; 5,6,7,8-tetrahydroisoquinolinyl; 5,6,7,8-tetrahydroquinazolin-4-yl; 1-benzo[b]thiophen-7-yl; 1-benzo[b]thiophen-4-yl; 1-benzo[b]thiophen-3-yl; isoquinolinyl; quinazolinyl; and indan-4-yl; or Ar is substituted phenyl; or an enantiomer thereof or any salt thereof; to a pharmaceutical composition containing said compounds and to the use of said compounds in therapy. The present invention further relates to processes for the preparation of compounds of formula I and to new intermediates used in the preparation thereof.

The invention relates to a chiral thermal activation delayed fluorescence material and a preparation method thereof. The delayed fluorescence material is R / S-18,21-di(10H-phenoxazine-10-yl)-3,4,5,6,7,8,9,10-octahydrodibenzo[a,c]dinaphtho[2',1':5,6;1',2'':7,8][1,4]dioxin[2,3i]phenazine, or R / S-16,17-bis(4-(10H-phenoxazine-10-yl)phenyl)3,4,5,6,7,8,9,10-octahydronaphthalo[2',1':5,6; 1',2'':7,8][1,4]dioxane[2,3g] quinoxaline. The compound provided by the invention has the characteristics of a rigid large-plane twisted structure and a remarkable internal charge transfer (ICT) effect, and has the advantages of typical thermal activation delayed fluorescence (TADF) property, circular polarization (CPL) property, high fluorescence quantum yield (PLQY), good thermal stability and the like. The method has the advantages of few synthesis and preparation steps, readily available raw materials, simple synthesis and purification processes and high yield, and can be used for large-scale synthesis andpreparation.

An acrylic sol composition comprising (a) acrylic polymer fine particles, (b) blocked polyurethane, (c) a polyamine compound containing at least one modification product derived from a polyether polyamine compound represented by formula (I): wherein X represents a residue of a di- to hexahydric polyol with m hydroxyl groups removed therefrom; A represents an alkylene group having 2 to 4 carbon atoms; B represents an alkylene group having 1 to 4 carbon atoms; m represents a number of 2 to 6; and n represents a number of 0 to 50; a plurality of A's, B's, and n's per molecule may be each the same or different, (d) a plasticizer, and (e) a filler. The composition generates neither hydrogen chloride nor dioxin when incinerated, exhibits high storage stability, cures at relatively low temperatures, and provides a coating film excellent in adhesion to a substrate, cold resistance, and strength.

A method or process is provided for treating contaminated sludge or soil that includes adsorbed polychlorinated biphenyl compounds (PCB) and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (collectively termed “dioxin-furans compounds”), the method includes pulverizing the sludge or soil and thereafter directing the sludge or soil to an extraction tank where the PCB and dioxin-furan compounds are extracted from the sludge or soil and are caused to become dissolved in a solvent. The treated sludge or soil is separated from the solvent and the solvent is subjected to an ultraviolet irradiation process that destroys the PCB and dioxin-furan compounds.

A dioxin analyzing method sensitively detecting dioxins is provided. The method includes the first step of obtaining respective specific wavelength spectra of a plurality of dioxin isomers whose concentrations are known, selecting a plurality of specific wavelengths from each of the specific wavelength spectra, and preparing calibration curves, each showing the relationship between the ion signal intensity and the dioxin isomer concentration at any one of the selected specific wavelengths, for all the specific wavelengths selected for each dioxin isomer; the second step of preparing a sensitivity matrix showing the relationship between the ion signal intensities and the dioxin isomer concentrations at the specific wavelengths, from the calibration curves of the dioxin isomers prepared in the first step; and the third step of obtaining a specific wavelength spectrum of a sample to be analyzed, and determining the concentrations of a plurality of dioxin isomers in the sample using the ion signal intensities of the specific wavelength spectrum and the sensitivity matrix prepared in the second step.

The invention provides an adding method and a device of an inhibitor used for reducing generation of dioxin in sintering process. According to the adding method, two stage mixing is adopted for adding of the inhibitor. The adding method comprises following steps: first stage mixing is carried out, wherein an inhibitor solution is delivered into a solution conveying system, conveying amount is controlled by a flow amount control device, and the inhibitor solution is uniformly mixed in a sintered pellet system or a coke blending system; another time of mixing is carried out, wherein the sintered pellets mixed with the inhibitor solution or coke powder mixed with the inhibitor solution and a sinter mixture are delivered into a sintering material mixer for another time of mixing; and at last an obtained sintering material is delivered into a sintering machine for sintering. Fine control on the inhibitor used for reducing generation of dioxin is carried out, and adding amount of the inhibitor solution is controlled to range from 0.005 to 0.01%, so that generation of dioxin is reduced, and at the same time unfavorable influences on sintered ore quality and sintering equipment caused by excessive adding of urea are avoided.

Provided is an unbleached paper product made from grass type pulp, the unbleached paper product has a brightness of 35-60% ISO, the grass type pulp is unbleached. The unbleached paper product includes an unbleached toilet paper, an unbleached hand towel, an unbleached wiping paper, an unbleached duplicating paper, an unbleached meal container, an unbleached food wrapping paper and an unbleached printing paper. The paper products have a high intensity and have no detection of dioxin and absorbable organic halides in the harmful substance detection test.

A dioxin analyzing method sensitively detecting dioxins is provided.The method includes the first step of obtaining respective specific wavelength spectra of a plurality of dioxin isomers whose concentrations are known, selecting a plurality of specific wavelengths from each of the specific wavelength spectra, and preparing calibration curves, each showing the relationship between the ion signal intensity and the dioxin isomer concentration at any one of the selected specific wavelengths, for all the specific wavelengths selected for each dioxin isomer; the second step of preparing a sensitivity matrix showing the relationship between the ion signal intensities and the dioxin isomer concentrations at the specific wavelengths, from the calibration curves of the dioxin isomers prepared in the first step; and the third step of obtaining a specific wavelength spectrum of a sample to be analyzed, and determining the concentrations of a plurality of dioxin isomers in the sample using the ion signal intensities of the specific wavelength spectrum and the sensitivity matrix prepared in the second step.

The invention discloses an inorganic adhesive, as well as preparation and application methods thereof. The inorganic adhesive is prepared from the following materials in parts by mass: 100 parts of water glass, 1 to 15 parts of phosphoric acid, 0.2 to 5 parts of sodium aluminate, 1 to 5 parts of polymeric borate-sodium, and 3 to 5 parts of potassium trimethylsilanolate. The invention further discloses the preparation method of the inorganic adhesive. The preparation method comprises the steps of mixing, heating and stirring the components so as to form a colorless, tasteless, non-combustible and transparent resin. The inorganic adhesive prepared through the invention is mainly applied to the casting industry so as to replace an alkaline phenolic resin and a furan resin, and the problem that an organic resin produces pungent smells and dioxin during the casting process is solved. The inorganic adhesive provided by the invention is low in inorganic resin adding amount, high in strength,good in collapsibility, good in withdrawing capability, beneficial to reducing the casting cost, and tasteless and non-toxic at the same time; and the non-combustible water-based inorganic resin is agreen and environmental-friendly product.

The invention relates to a method and device for purifying waste incineration smoke. In the method, smoke generated in a waste incineration process is subjected to processes such as wet-type deacidification, heating, activated carbon adsorption, bag dust collection and the like, wherein the wet-type deacidification process plays a role in instantly cooling the smoke generated in a secondary combustion chamber so as to avoid re-synthesis of dioxin. Meanwhile, before entering a dust collector, the smoke subjected to wet-type deacidification is heated by virtue of a heater, so that the phenomenon of pasted bag caused by water vapor condensation is avoided.

A compound of Formula (I) or a pharmaceutically acceptable salt thereof:wherein:R1 represents a group selected from:i) phenyl optionally substituted with one or two substituents independently selected from Me, OMe, CF3, F, Cl and NMe2;furanyl, thiophenyl, pyrrolyl, pyridyl, cyclohexyl or naphthyl, each of which is optionally substituted with one or two substituents independently selected from Me, OMe, CF3, F, Cl and NMe2; andiii) benzo[1,3]dioxo5-yl or 2,3-dihydrobenzo[1,4]dioxin-6-yl;R2 represents CF3, C1-4alkyl, or CHF2;when R1 represents optionally substituted furanyl, thiophenyl, pyrrolyl, pyridyl or naphthyl, R3 represents Et;when R1 represents optionally substituted cyclohexyl, R3 represents Et or Me;otherwise R3 represents Et, Me, Br or OMe,compositions containing them, their use in therapy, for example in the treatment of tuberculosis, and methods for the preparation of such compounds, are provided, together with certain novel compounds.

The invention relates to the technical field of catalysts, in particular to a multifunctional catalyst for denitration and dust removal of dioxin as well as a preparation method and application of themultifunctional catalyst. The multifunctional catalyst provided by the invention is prepared from the following raw materials: filter cloth and slurry containing the catalyst; the slurry is preparedfrom the following components in parts by weight: 100 parts of a V2O5-MoO3-TiO2 catalyst, 100 to 350 parts of water, 0.1 to 0.2 part of a dispersing agent, 50 to 80 parts of a binding agent, 0.1 to 1part of a defoaming agent and 1 to 3 parts of a tetrafluoroethylene solution, wherein the mass concentration of tetrafluoroethylene is 5%, and the mass ratio of the filter cloth to the slurry containing the catalyst is 20:(3-9). The multifunctional catalyst provided by the invention can integrate denitration, dust removal and dioxin removal, the denitration efficiency reaches 79% or above, the dust removal efficiency reaches 99% or above, and the highest dioxin removal rate can reach 99.5% or above.

The present invention relates to a thermal oxidative treatment method and system for organic sludge, wherein the organic sludge and a thermal metal ball are mixed and transported to an oxidative chamber to burn, where the temperature reaches 850 to 1000 DEG C required by sludge complete oxidation decomposition, the reactive result is to generate flue gas and dust that contain COV, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzo-furans which is absorbed from a dioxin collecting-purifying tank and is dissolved in an oilness dissolvant, 60% of the fuel gas and dust heat can be used in a next circulation reheating reaction of the steel ball and the sludge, the temperature of the gas after purifying processing is 22 DEG C, thus it is able to reduce greenhouse gases discharge and energy consumption.

The invention discloses application of thiourea-formaldehyde macromolecules in iron ore sintering fly ash and belongs to the field of environment and macromolecule chemical technologies. According to the application, the thiourea-formaldehyde macromolecules are added into the iron ore sintering fly ash to serve as an inhibitor to inhibit the toxicity equivalent weight of dioxin in the iron ore sintering fly ash sintering product, and an obvious inhibiting effect is achieved on generation of dioxin in the iron ore sintering fly ash and a precursor of the dioxin. The adding amount of the thiourea-formaldehyde macromolecules is 0.5%-2% of the mass of the iron ore sintering fly ash. Compared with a previous common sulfur-based and nitrogen-based inhibitor, the inhibitor for application is non-toxic, good in stability, high in decomposing temperature and easy to store and transport; and the obvious inhibiting effect is achieved on the generation of the dioxin in the iron ore sintering fly ash and the precursor of the dioxin, and the inhibiting efficiency of the inhibitor is higher than that of reported substances such as urea.