32results about How to "Strong resistance to chlorine poisoning" patented technology

The invention relates to a catalyst for low temperature catalytic combustion of polychlorinated aromatic hydrocarbon. The catalyst is Fe, Ni, Cr, Bi or Mn doped with tricobalt tetroxide. The catalyst is used for low temperature catalytic combustion elimination of the polychlorinated aromatic hydrocarbon, and is high in activity, high in chlorine poisoning resistance, long in catalytic life and has few by-products, thus being especially suitable for eliminating the polychlorinated aromatic hydrocarbon by low temperature catalysis. In air, the catalyst can be used for stably converting the polychlorinated aromatic hydrocarbon in the waste into carbon dioxide and hydrogen chloride for a long time at the lower reaction temperature, and the activity of the catalyst is not lowered.

The invention discloses a catalyst for purifying waste incineration flue gas. The catalyst uses vanadium pentoxide, platinum oxide and tungsten oxide as active components, γ-alumina, titanium dioxide and carbon nanotubes as carriers, and manganese oxide One or more of , iron oxide, copper oxide, tin oxide, and cerium oxide are coagents. The catalyst of the invention not only has the function of decomposing dioxins and chlorobenzene compounds, but also has the function of denitrification and anti-sulfur, and still has excellent removal ability for dioxins and NOx at relatively low temperature. The invention also discloses a preparation method of the catalyst for purifying waste incineration flue gas. The preparation method has the advantages of simple operation, convenience and controllability, and is suitable for large-scale industrial production.

The invention provides a denitration catalyst, a preparation method and application thereof. The denitration catalyst includes CeO doped with Mn compound 2 , wherein the molar ratio of Ce atoms to Mn atoms is 0.2-5:1; the average particle size of the denitration catalyst is 1-100 nm; the surface of the denitration catalyst has active ions, and the active ions include inorganic acid ions. The denitration catalyst of the invention has excellent denitration efficiency, is low in price, is environmentally friendly and has no obvious toxicity. Furthermore, the denitrification catalyst can also remove chlorine-containing volatile organic compounds while removing nitrogen oxides, has excellent chlorine poisoning resistance, and is suitable for the removal of nitrogen oxides in flue gas in metallurgy, steel sintering, and waste incineration. Synergistic removal of chlorinated volatile organic compounds.

The invention discloses a third main group element modified ruthenium titanium compound oxide and a preparation method and an application thereof and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: first, preparing a titanium oxide catalyst carrier modified by third main group elements with different molar contents by means of a sol-gelmethod; and then loading ruthenium by means of an impregnating method to prepare the compound oxide. Titanium salt used by the sol-gel method is titanium sulfate, tetraisopropyl titanate or tetrabutyltitanate, and the used third main group element salt is borate, aluminate, gallium salt or indium salt. The catalyst for chlorohydrocarbon catalytic combustion is low in ignition temperature, and lowin complete combustion temperature. In conditions that the air speed is 60000 ml / g / h and the chlorohydrocarbon concentration is 1000 ppm, the chlorohydrocarbon can be fully combusted at a temperatureof lower than 350 DEG C. Meanwhile, the catalyst also has very high stability, and can be activated for 100 hour at 305 DEG C in catalytic combustion of dichloromethane. The preparation method of thecatalyst is simple and easy to operate, and the prepared catalyst has activity and stability.

The invention relates to a catalyst for eliminating benzene dichloride through complete catalytic oxidation and a preparation method of the catalyst. The catalyst is prepared by the following steps: adding citric acid monohydrate into a 0.1mol / L mixed solution containing a cobalt salt and a manganese salt according to a mole ratio of citric acid monohydrate to the sum of cobalt and manganese of 0.50-0.70, wherein the mole ratio of Mn / (Co+Mn) is equal to 0.08-0.75; when the citric acid monohydrate is completely dissolved, transferring the mixed solution to a spin steaming instrument; performing spin steaming at 20-25 DEG C until colloid is generated; then heating to 60-75 DEG C, and performing spin steaming for a whole night; drying obtained citrate at 80-110 DEG C; and roasting for 4 hours at 350-600 DEG C to obtain a manganese doped cobalt tetroxide catalyst. The catalyst provided by the invention is used for eliminating benzene dichloride through low-temperature catalytic combustion, is high in activity, less in byproduct and good in stability.

The invention discloses a composite catalytic filter material for low-temperature degradation of dioxins and a preparation method thereof, belonging to the technical field of waste incineration tail gas treatment. The high-temperature-resistant filter material is used as a catalyst carrier, activated by the filter material, precipitated in situ, and impregnated with V active group and low-temperature plasma oxidation steps to prepare loaded VO x -MnCeO x Composite catalytic filter material for three-way catalyst. The advantages of the present invention are: (1) excellent low-temperature activity and selectivity for catalytic degradation of dioxins; (2) active component V with high activity and excellent chlorine poisoning resistance is added to the filter material, through Effectively oxidize V active components, improve catalytic activity and chlorine poisoning resistance; (3) achieve even and firm loading of the catalyst on the surface of the filter material by in-situ precipitation method, mild preparation conditions, maintain the original performance and stability of the filter material, long lasting.

The invention discloses a Sn-Mn-Ce-La catalyst. A preparation method of the catalyst comprises the following steps: 1) weighing and dissolving metered Mn(NO3)2, Ce(NO3)3*6H2O, La(NO3)3*6H2O and citric acid in water to obtain a mixed solution, and stirring the mixed solution at the constant temperature of 50-80 DEG C for 5-10 hours to obtain a yellow jelly-like substance; 2) drying the yellow jelly-like substance, adding an aqueous SnCl2*2H2O solution, stirring sufficiently, adding ammonia water dropwise and regulating PH to 9-10 to obtain a precipitate and a mother liquor; and 3) filtering, washing and drying the precipitate and roasting the precipitate in air to obtain the Sn-Mn-Ce-La composite oxide catalyst. The catalyst has higher low-temperature catalysis to eliminate the activity, chlorobenzene can be converted completely at the temperature of 190 DEG C-210 DEG C, and inactivation does not occur when continuous reaction is performed for 30 hours at the temperature of 250 DEG C-300 DEG C.

The invention discloses a catalyst for low-temperature catalytic combustion of chlorinated hydrocarbons, which is composed of carrier nano-cerium oxide and loaded tungsten, wherein the tungsten exists in the form of tungsten oxide, and the loading capacity of tungsten element is calculated by weight. 1 to 20%. The invention also discloses a preparation method of the catalyst and an application of the catalyst in low-temperature catalytic combustion of chlorinated hydrocarbons. Compared with nano-cerium oxide without tungsten, the catalyst has significantly improved catalytic activity, has excellent catalytic activity for chlorinated aliphatic hydrocarbons and chlorinated aromatic hydrocarbons, and has strong chlorine poisoning resistance and long service life, etc. It can be widely used in the low-temperature catalytic purification of chlorinated hydrocarbons produced in textile, pharmaceutical, leather and wood processing. The preparation method of the catalyst of the invention has simple process and low raw material price.

The invention relates to a method for low-temperature catalyzing and burning chloro aliphatic hydrocarbon, wherein it is characterized in that: with catalyst, burning the air with water and the mixture with chlorine volatile aliphatic hydrocarbon; said catalyst is formed by rare-earth oxide, or rare-earth oxide and one or several oxides of order-variable transient metals; the doping amount of said transient metal is 0.1-30wt% at oxide; the invention has simple preparation, without side product and secondary pollution; and the catalyst has long service, to be completely catalyze and burn halide organic compound, with low cost.

The invention discloses a catalyst for removing chlorophenol compounds through catalytic hydrogenation. The catalyst is mainly composed of a phosphoric acid modified aluminum oxide carrier and a metal palladium loaded by the phosphoric acid modified aluminum oxide carrier. Nitrogen used as a reducing agent is introduced into a reactor, and the chlorophenol compounds are finally transformed into cyclohexanone and phenol without secondary pollution under the conditions of low temperature or room temperature and normal pressure or low pressure. The catalyst disclosed by the invention is high in catalytic activity, mild in reaction conditions, and convenient to operate, and is especially suitable for removing chlorophenol compounds in water thruogh catalytic hydrogenation.

The invention relates to a metal pillar modified layered manganese Birnessite and its preparation and application. The present invention prepares a layered manganese precursor by hydrothermal method by adding a sedimentation aid, and then undergoes hydrogen ion exchange, pillar replacement, and The reaction of introducing metal ions, and finally roasting to obtain metal pillar modified layered manganese Birnessite, the prepared catalyst has high catalytic oxidation activity, catalytic degradation performance, thermal stability and anti-poisoning ability, and can be used for catalytic degradation Volatile organic compounds (VOCs) in flue gas. The preparation method provided by the invention is simple and has industrial application value.

The invention relates to a metal-doped modified layered δ-MnO 2 Its preparation and application, by adding a sedimentation aid, the metal-doped layered δ-MnO is prepared by a hydrothermal method 2 , whose specific surface area increases as undoped layered δ‑MnO 2 5 times of , the pores are denser, so that the metal-doped layered δ-MnO of the present invention 2 It has high catalytic oxidation activity and high chlorine resistance, and has efficient catalytic degradation performance for refractory volatile organic compounds in organic waste gas. The preparation method provided by the invention is simple and has industrial application value.