69results about How to "Strong sulfur resistance" patented technology

The invention provides a coke-oven gas methanation catalyst and a preparation method thereof. The coke-oven gas methanation catalyst is prepared by loading a certain amount of active ingredients Ni on composite oxide TiO2-ZrO2-SiO2 serving as a carrier, and using rare-earth elements RE and metal M as aids. The catalyst has the advantages which cannot be achieved by other methanation catalysts. The catalyst has the characteristics of high low-temperature activity, sulfur resistance capacity, good high temperature resistance performance and the like, and the function of hydrocarbon cracking andgood antioxidation performance and the like and is easy to prepare.

The invention provides a catalyst for hydrogenation refining, wherein the main active constituent of the catalyst is Ni, the auxiliary agent is Mo, the carrying agent is Ti-modified SiO2, the content of NiO is 20-60 wt%, the content of MoO3 is 0.5-10 wt%, the content of TiO2 is 2-20 wt%.

The invention belongs to the technical field of atmosphere pollution control and in particular relates to a denitration catalyst for inhibiting SO2 oxidization as well as a preparation method and application thereof. The denitration catalyst takes titanium dioxide as a carrier, takes one or more of cerium oxide, iron oxide and vanadium oxide as active components and takes one or more of barium oxide, molybdenum oxide and tungsten oxide as auxiliary agents. The denitration catalyst has the advantages that the specific surface area of the catalyst is effectively enlarged and the denitration efficiency is remarkably improved; the problem of a traditional vanadium-based catalyst that low-temperature sulfur poisoning suddenly reduces the activity is solved. The denitration catalyst has the specific surface area of 100m<2>/g to 160m<2>/g; the denitration efficiency keeps 95 percent or more under conditions that the temperature is 150 DEG C to 300 DEG C and the air speed is 3,000h<-1> to 100,000h<-1>, and the N2 selectivity is higher than 92 percent; nitrogen oxide flue gas containing 0 to 3000mg/m<3> of SO2 still keeps 90 percent or more, the N2 selectivity is higher than 90 percent and the SO2 oxidization efficiency is less than 1 percent; the denitration catalyst has a high anti-sulfur capability and is especially suitable for nitrogen oxide emission control of flue gas generated in fields of glass, steel, coke ovens for coking and the like.

The invention relates to a catalyst used in a hydrofining reaction of terephthalic acid and a preparation method thereof, and mainly solves the problems that the prior Pd-C catalyst has poor sulfur resistance and the Pd grain is liable to grow. The components in weight percentages of the catalyst are as follows: a) 0.3% to 0.8% of Pd; b) 0.01% to 0.5% of oxides of at least one metal selected from rare-earth elements; and c) a carrier in balance amount, wherein the carrier is coconut shell charcoal with a particle size ranging from 4 meshes to 8 meshes and a specific surface area more than 1000 square meter/g; and the Pd and the oxides of rare-earth elements are distributed from the surface of the carrier to the superficial layer (at a depth ranging from 40micrometers to 100 micrometers). With the technical scheme, the catalyst overcomes the problems in the prior art and is applied to the commercial-scale hydrofining of terephthalic acid.

The invention belongs to the technical field of chemistry and chemical engineering and particularly provides a coupled catalyst system used for directly producing light olefins with synthetic gas. Theinvention mainly solves the problem of low selectivity on the light olefins of a catalyst used for preparing light olefins with synthetic gas in the prior art. In the catalyst, a synthetic gas-to-alcohol catalyst and an alcohol-to-olefin catalyst are coupled to achieve the one-step process of directly producing olefins with synthetic gas. The synthetic gas-to-alcohol catalyst is a modified molybdenum-based catalyst had has the molecular general formula of MoTt-XaYbZc, wherein T is at least one selected from S, O or C, the X is one or more of Fe, Co, Ni, Ru, Rh and Pd; the Y is one or more ofCr, Mn, Zn, La, Ce; the Z is one or more selected from alkali metals. The alcohol-to-olefin catalyst is a molecular sieve having a CHA skeleton structure. The catalyst solves the mentioned problems well, can product C2-C4 olefin products high-effectively, continuously and stably, and can be used for industrial production of preparing light olefins with synthetic gas.

A nano-molybdenum-based sulfur-tolerant methanation catalyst takes metal Mo as the main active component.A second active component metal M1 and an additive metal M2 are added on the basis of the main active component, and the catalyst is prepared from, by mass, 5%-55% of M, 2%-50% of M1, 0.2%-20% of M2 and the balance oxygen atoms.The nano-molybdenum-based sulfur-tolerant methanation catalyst has the advantages of being simple in preparation, high in sulfur-tolerant capacity, high in methanation activity, good in stability and free of carbon deposition.

The invention discloses a medium and low temperature denitration catalyst with a protective layer and a preparation method thereof. The catalyst is composed of an outer layer protective film and an inner layer catalyst body; the outer layer protective film takes a mixture of titanium dioxide nanoparticles and titanium nanotubes as a substrate material, and V, Ce and Cu composite oxide is doped; the inner layer catalyst body takes the titanium dioxide nanoparticles as carriers, takes V and Ce composite oxide as a main active component and takes trace precious metal as an additive. The catalyst is provided with the protective film with a special structure, the protective film has good medium and low temperature denitration activity by itself, sulfur ammonium salt particles can not enter pore passages of the titanium nanotubes, reaction gas can reach the inner layer catalyst body through the pore passages of the titanium nanotubes, the catalyst shows excellent water-resistant and sulfur-resistant properties, and the service life is effectively prolonged.

The invention discloses a sulfur-resistant BaFe1-xTixO3 perovskite catalyst, preparation and application, preparation and application, and belongs to a NOx eliminating catalyst technology. The structural formula of the catalyst is BaFe1-xTixO3, wherein X is 0.1-0.3; a preparation method of the catalyst comprises the following steps of: after mixing nitrates of Ba and Fe, using citric acid and EDTA (ethylene diamine tetraacetic acid) as complexing agents to regulate the pH (potential of hydrogen) to be 6, drying the sol after the mixture forms the sol, and dipping the sol in Ti after roasting the gel at a low temperature; roasting the gel at a high temperature to prepare a perovskite sample; performing NOx storage on the sample; and testing the sulfur-resistance and regeneration performance of the sample. The catalyst has the following advantage: a NOx storage catalyst with high sulfur-resistance is prepared through a dipping method. The perovskite catalyst has an excellent sulfur-resistant characteristic and regeneration performance, and is a non-noble metal NOx storage reduction catalyst which has a good development prospect.

The invention provides a doped Hollandite type titanium oxide ammonia catalytic selective reduction nitrogen oxide (NH3-SCR) denitrified monolithic catalyst, and relates to the environmentally-friendly technology in the field of catalytic science and energy saving. The catalyst is characterized in that: a honeycomb cordierite ceramic material serving as a base material and gamma-Al2O3 serving as a carrier carry Anatase crystal TiO2 powder at first, and then carry Hollandite structured titanium oxide (V-HOL) of an active component framework vanadium ion (V5+), wherein the contents of gamma-Al2O3 and TiO2 are 5-15 weight percent and 5-10 weight percent respectively; the V-HOL is 5-20 weight percent; and the molar ratio of V/Ti is between 0 and 0.20. According to the monolithic catalyst, at a broad temperature window of between 100 and 450 DEG C, the conversion rate to NOx by using NH3 as a reducing agent is more than 85 percent, and the selectivity to N2 is more than 95 percent. The catalyst is suitable for controlling emission of nitric oxides.

The invention discloses a method for preparing hydrocarbyl phenol by catalytic conversion of a phenolic compound in the presence of a molybdenum-based catalyst. The method comprises mixing a phenoliccompound, a molybdenum-based catalyst and a reaction solvent, adding the mixture into a sealed reactor, feeding gas into the reactor, heating the mixture to 150-350 DEG C, carrying out stirring for areaction for 0.5-2h, then filtering to remove a solid catalyst and carrying out rotary evaporateion to obtain a liquid product. The phenolic compound has a wide source, a cost is low, product alkyl phenol selectivity is high, an added value is high, alcohol or an alcohol-water mixture is used as a reaction solvent, environmental friendliness is realized, pollution is avoided, any inorganic acids and alkalis are avoided in the reaction process, the common environmental pollution problems in the biomass processing technology are solved, the reaction conditions are mild, the process can be carried out at a low temperature, high-efficiency conversion of the reactants can be realized without consuming hydrogen gas and the method is suitable for large-scale industrial trial production.

The invention relates to the technical field of catalysts, and provides an organic contaminated soil thermal desorption waste gas catalytic oxidation purification catalyst and a preparation method and application thereof. The catalyst provided by the invention comprises a matrix, a carrier and active components, the matrix is honeycomb cordierite, the carrier is a CeO2-ZrO2 compound or a CeO2-ZrO2-R compound (R is one or more of La2O3, Co3O4, Y2O3 and SiO2), the active components are MnO2 and RuO2, and an auxiliary agent WO3-TiO2 is further loaded on the matrix. The catalyst provided by the invention has high catalytic efficiency in a temperature range of 450-650 DEG C, can completely convert organic contaminated soil thermal desorption waste gas, has good high-temperature stability, strong sintering resistance and carbon deposition resistance, and also has good alkali, alkaline earth and heavy metal resistance, chlorine resistance and sulfur poisoning resistance.

The invention relates to a sulfated vanadium-chromium-titanium denitration catalyst as well as a preparation method and application thereof, and belongs to the fields of air pollution control technology and environmental catalysis. The catalyst is obtained by sulfating with titanium dioxide serving as a carrier, V2O5 serving as a main active component and Cr2O3 serving as an auxiliary agent. The sulfated vanadium-chromium-titanium catalyst prepared by the method has good activity in the ammonia selective catalytic reduction NOx reaction, the NOx conversion rate is 80% or above within the range of 250-450 DEG C and the air speed is 100000 h<-1>, and the sulfated vanadium-chromium-titanium catalyst has good sulfur resistance. The catalyst disclosed by the invention can be used for efficiently removing NOx in stationary source flue gas and diesel vehicle tail gas.

The invention provides a low-temperature sulfur-tolerant denitration catalyst and a preparation method and application thereof. The catalyst consists of an active component, an auxiliary agent and a carrier. The active component has a perovskite structure and is a composite oxide containing La, Ni, Co and Mn elements, the auxiliary agent is oxide of Ce and P, and the carrier is a mixture containing iron oxide, titanium oxide and zirconium oxide. The catalyst is prepared by a method of combining chemical precipitation, chemical complexing and impregnation, and the preparation method is simple,mild in condition and low in cost. The NO conversion rate of the catalyst reaches up to 90% within the temperature range of 200-300 DEG C, and the catalyst has excellent sulfur resistance and water resistance.

The invention discloses inner-wall paint for liquid-food can with high-temperature resistant sterilization. The paint is prepared from the following compositions: modified polyester resin, ethyl acrylate, shellac resin, starch gel powder, stuffing, adjuvant, and solvent. Compared with other existing inner-wall paint for liquid-food can, the present inner-wall paint for liquid-food can is capable of greatly enhancing the storage stability of canned food. The paint film has long life, and is 2-3 times higher than the life of normal canned food inner-wall paint. The paint layer formed after coatings of the inner-wall paint for canned food is firm, with greater brightness, strong adhesion, acid resistant, sulfur resistant, strong salt resistant, stable in functionality, hard to be corroded, and non-discoloring. The present paint has good high-temperature resistant ability and sterilization ability; it can adapt to most of the high-temperature sterilizations at different temperature levels on the market; meanwhile the paint is not harmful to environment, does no harm to human bodies, and is beneficial for green environmental protection.