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

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.

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.

Disclosed is a vanadium / titania-based catalyst including natural manganese ore for removing nitrogen oxides and dioxin in a wide operating temperature range and a method of using the same. Specifically, this invention pertains to a vanadium / titania (V / TiO2)-based catalyst, including natural manganese ore, and a method for removing nitrogen oxides and dioxin over a wide operating temperature range, in which the WTiO2 catalyst for selective catalytic reduction of nitrogen oxides and removal of dioxin contained in flue gas includes 5-30 wt % of natural manganese ore.

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.

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.

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.

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.

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.

Provided are a peptide with a cytoprotective effect against environmental pollutants and a use thereof. The peptide consisting of an amino acid sequence of SEQ ID NO: 1, 2, or 3 directly binds to 2,3,7,8-tetrachlorodibenzo-p-dioxin (hereinafter, referred to as TCDD), known as being the most toxic among the class of dioxins, to prevent dermal penetration and the activation mechanism of AhR by TCDD and polycyclic aromatic hydrocarbons contained in fine dust. Such a direct cytoprotective effect against environmental pollutants is distinguished from preexisting methods that are configured to indirectly block opportunities to contact these materials or to reduce toxicity through barrier reinforcement.

Disclosed herein is a method for producing a transparent or opaque flooring sheet or a flooring using a styrene-butadiene copolymer resin (as a thermoplastic elastomer) by calendering. The flooring causes no problems associated with environmental hormones, and generates no halogen gases or endocrine disruptors, such as dioxin, during incineration. Further, the flooring can be regenerated and reused at any time, and exhibits superior stability upon installation and mounting and excellent elastic restoration after application of stress due to inherent flexibility of rubber.

A process and apparatus assuring low costs and high efficiency in practicing refuse incineration. A applying electromagnetic wave of a frequency band resonant with rotation or vibration of a specific substance e.g., dioxins molecule, thereby to heat the dioxins molecule selectively up to high temperature to remove the dioxins molecule by decomposition.

The invention discloses a method for controlling dioxin in waste salt pyrolysis. The method comprises the following steps: step 1, introducing waste gas generated by pyrolyzing waste salt through a pyrolyzing furnace into a secondary combustion chamber; 2, introducing sufficient air and auxiliary fuel into the secondary combustion chamber to heat pyrolysis gas to 1100 DEG C so that the pyrolysis gas can be subjected to combined firing in the secondary combustion chamber and stay for 2 seconds or above; 3, after flue gas incinerated in the secondary combustion chamber enters a waste heat boiler for heat recovery, reducing the temperature of the flue gas to 550 DEG C from 1100 DEG C, and then enabling the flue gas to enter a quench tower; and 4, controlling the temperature of the flue gas to be 500-220 DEG C through the quench tower for emergency cooling. The control method has the beneficial effects that the sufficient air and auxiliary fuel are introduced into the secondary combustion chamber to heat flue gas to 1100 DEG C, so that the pyrolysis gas is subjected to combined firing in the secondary combustion chamber and stays for 2 seconds or above, harmful gas is thoroughly decomposed and combusted and is completely converted into harmless CO2 and H2O, and the dioxin and dioxin precursors which are possibly generated are fully destroyed.

The present invention refers to new purified compositions of long chain polyunsaturated fatty acids, or their salts or esters, characterized by being essentially free from other usually present—but structurally different—components, such as furan fatty acids, phytanic and pristanic acids, squalene, and some oligomers, as well as several “persistent” environmental pollutants, such as polychlorinated dibenzo-dioxins and polychlorinated dibenzo-furans, polychlorinated biphenyls, polybrominated diphenyl-ethers, polycyclic aromatic hydrocarbons, and others, which are also usually present and extremely toxic. The invention also refers to the purification method to obtain said compositions and the use thereof as food, food for special medical use, food and diet supplement, and drug.