366results about How to "High sulfur capacity" patented technology

The invention relates to a preparation of catalyzing and transforming-absorbing Fe-desulphurizer by high accuracy carbonyl sulfur at medium and low temperature, which has a good hydrogenation effect to the carbonyl sulfur and absorbs the produced carbonyl sulfur. The invention can be used to accurately remove the carbonyl sulfur in the ammonia material gas, coke oven gas, natural gas and composed gas. The desulphurizer is provided with primary active components Fe2O3, CeO2, MnO2, Ni2O3, and secondary components CuO, ZnO, MgO, K2O and etc, and the carriers are Al2O3, ZrO2, and residual binding agent and expanding drilling agent, and water. The process has a reacting temperature of 150-350 DEG C, an airspeed of 500-2000h-1, a carbonyl sulfur concentration in the gas from minim to 5000ppm. The inventive desulphurizer has a high catalytic transforming capacity with a carbonyl sulfur converting ratio more than 99%.

The invention relates to a method for preparing magnetic oxide iron Fe21.333O32, which comprises the following steps: (a) mixing solid soluble ferrous salt and solid hydroxid according to a molar ratio of iron to hydroxyl being between 1:2 and 1:3; (b) completing reaction of a mixed material prepared in step (a) by kneading, and controlling the temperature of the material not to exceed 70 DEG C in the kneading process; (c) drying a reaction product obtained in step (b) in air; (d) washing and filtering a material obtained in step (c); (e) naturally drying or baking a solid obtained in step (d); and (f) roasting a product obtained in step (e) at a temperature of between 150 and 500 DEG C. The invention further discloses a magnetic oxide iron Fe21.333O32 desulfurizer prepared by the preparation method. Tests show that the desulfurizer has high sulfur capacity reaching 62.0 percent.

The invention relates to a method for preparing a material containing amorphous iron oxide hydroxide and two methods for regenerating the same after being used as desulfurizer. The content of the amorphous iron oxide hydroxide in the material prepared by the invention is as high as 65% to 100%, so the sulfur capacity of the material is high; and the desulfurizer in the prior art is non-regenerative or costly for regeneration, so that the desulfurizer in a large amount cannot but be dumped as waste liquid in landfills, while the amorphous iron oxide hydroxide in the material of the invention can be repeatedly regenerated and reused after the material is used as the desulfurizer, thereby solving the problems of the waste of effective resources in the original desulfurizer and the severe environmental pollution.

The invention provides a gasoline desulfurization method. The gasoline desulfurization comprises the following steps: cutting a gasoline raw material into a light gasoline fraction and a heavy gasoline fraction; performing adsorption desulfurization on the light gasoline fraction to obtain desulfurized light gasoline fraction; and performing selective hydrogenation desulfurization on the heavy gasoline fraction to obtain desulfurized heavy gasoline fraction, wherein the cutting temperature of the light gasoline fraction and the heavy gasoline fraction is 70-110 DEG C. By adopting the gasoline desulfurization method, not only can deep desulfurization of gasoline be realized, but also the octane loss is low.

The invention relates to a sulfur and arsenic adsorbent and a preparation method thereof to mainly solve the problems of high bulk density and low sulfur and arsenic capacity of sulfur and arsenic adsorbents in the prior art. The sulfur and arsenic adsorbent comprises, by weight, 1-10 parts of aurichalcite, 10-50 parts of copper oxide, 10-60 parts of zinc oxide, 0.1-5 parts of iron oxide and 0.1-5 parts of manganese oxide. The sulfur and arsenic adsorbent adopting the above technical scheme well solves the problems, and can be used to purify natural gas, synthetic gases and lightweight gas and liquid hydrocarbons.

The invention relates to novel spherical active carbon and the application thereof in the field of desulfurization. The novel spherical active carbon of the invention is prepared by carrying out equivalent volume impregnation or excessive impregnation of pitch-based spherical activated carbon or resin-based spherical activated carbon with the alkaline compound of sodium or potassium and drying the materials at 30-160 DEG C. The novel spherical active carbon of the invention can be taken as H2S desulfurizer and has the advantages of simple preparation, large breakthrough sulfur capacity, small air resistance in the application of a fixed bed, small pressure reduction and low dust capacity of active carbon. The novel spherical active carbon can be widely applied to the removal process of H2S in the tail gas of sewage treatment plants, synthesis gases, petroleum and natural gas.

The invention provides an adsorbent for deep desulfurization of refined benzene and a preparation method thereof. With alumina or sodium-potassium-lanthanum modified alumina as carrier-loaded noble metal palladium, the adsorbent at least comprises the following components in percentage by weight: 0.3-1.5 % of noble metal palladium, 0-3 % of sodium, 0-3 % of potassium, 0-5 % of lanthanum and the balance of alumina carrier. A best desulfurization effect is obtained if the alumina manufactured by using an oil column molding method is used as the carrier-loaded noble metal palladium. The adsorbent provided by the invention has the advantage of strong adsorbing capacity to sulfur and large sulfur capacity; and the total sulfur in the refined benzene can be reduced from 1 ppm to less than 0.01 ppm.

The invention provides a desulfurization adsorption agent used for gasoline and a gasoline desulfurization method. The desulfurization adsorption agent is obtained by taking a molecular sieve treated by an alkali and active carbon as compound carriers, and loading active metal components, wherein active metal is selected from one or more of elements in IA, IIA, VIII, IB, IIB and VIB groups in a periodic table. The desulfurization adsorption agent has a large sulfur capacity and long service life; and furthermore, a regeneration method is simple.

A desulfurizing with high sulfur capacity for removing thiols, thioether and hydrogen sulfide from natural gas, petroleum gas, and other industrial gases is composed of carrier (activated carbon) and catalyzing component prepared from metallic oxide or salt (0.1-5 Wt%), modifier (2-10) and promoter (0.01-0.5). Its preparing process includes such steps as pre-treating activated carbon, impregnating the catalytic component, and drying.

The invention discloses a desulfurizer which is composed of subcarbonate, silica and accessory ingredient. Based on the total weight of the desulfurizer, the desulfurizer comprises, in percentage by weight, 50-97 wt% of subcarbonate, 2.5-20 wt% of silica and 0.1-30 wt% of accessory ingredient, wherein the subcarbonate is at least one of basic cupric carbonate and basic zinc carbonate, and the accessory ingredient is at least one of alumina and attapulgite powder. The desulfurization (H2S) precision of the desulfurizer can be less than 0.05mg/M3, and sulphur content is about 20% (Wt/Wt). Because the raw material does not need high-temperature decomposition, energy consumption can be greatly lowered by more than 50%, thus obtaining the purpose of energy saving and emission reduction.

The invention discloses high-efficiency deep desulfurization active carbon and a preparation method thereof, belonging to the field of modified active carbon materials. The high-efficiency deep desulfurization active carbon is prepared through the steps of by adopting coal or a coconut shell as raw materials, crushing, screening, then adding a coal tar adhesive for extrusion forming, and calcining at 750-950 DEG C to form primary active carbon; carrying out dipping treatment on the primary active carbon, uniformly loading a hydroxide active agent and a cyclodextrin assistant active agent, carrying out secondary high-temperature calcination in the presence of excessive heat water vapors to obtain a high-efficiency desulfurization active carbon product. The active carbon prepared through the method disclosed by the invention has the advantages of high sulphur capacity, high desulfurization speed, long usage period, high strength, good abrasion resistance, good material permeability, no dust and the like, can not only be used for the large-scale deep desulfurization and purification of petrochemical products such as fuel oil, natural gas, gas, liquid hydrocarbon and synthetic ammonia, but also be used for the fields of pharmaceutical gas sterilization, solution filtration and purification, solvent recovery, water purification, gas purification and the like.

The invention discloses a desulphurization and denitration catalyst. The catalyst comprises the following components by mass percentage: 4 to 18 percent of CuO, 80 to 95 percent of gamma-Al2O3, and 1 to 2 percent of promoter. A method for preparing the catalyst comprises the following steps: (1) adding aluminum isopropoxide into distilled water, stirring the mixture, adding a nitric acid solution into the mixture dropwise, and carrying out the evaporation in the air to obtain a boehmite sol; (2) adding the promoter into a copper nitrate solution, then adding the mixture into the boehmite sol, then adding the nitric acid solution dropwise, stirring the mixed solution for ageing, and aggregating the mixed solution into a semi-gel; and (3) adding the semi-gel dropwise into a gel pool containing ammonia water and liquid paraffin through a dropper, and obtaining the catalyst after ageing, drying and baking. The prepared catalyst can be used for synchronous desulphurization and denitration, and can be regenerated and used cyclically with low raw material cost. As the byproducts can be reutilized, the catalyst brings about no secondary pollution.

A process for removing SO2 from fume by use of the activated carbon-based adsorbent features that the fume containing SO2 flows through the desulfurizing tower (or tank) filled by activated carbon-based adsorbent, and said adsorbent can be regenerated by hot water washing or high-temp inertial gas scavenging. Its by-product is H2SO4 or S.

The invention belongs to the technical field of waste gas desulfurization and purification, particularly provides a modified active carbon desulfurizer and a preparation method thereof, and a hydrogen sulfide waste gas treatment method using the desulfurizer. The modified active carbon desulfurizer is prepared from impregnating activated carbon with active agent mixed solution comprising phenol, acetone, sodium carbonate, ferric nitrate and organic solvent, and drying and roasting the mixture. The modified active carbon desulfurizer converts the hydrogen sulfide in the waste gas into sulfur dioxide at atmospheric temperature and pressure under the absorption and catalytic oxidation action, and the sulfur dioxide is converted into SO42- in water phase by washing and removed. The waste gas treatment method uses the modified active carbon desulfurizer, and prevents the defects that the desulfurizer needs to be regularly desorbed and regenerated due to blockage caused by adsorption saturation and generated elemental sulfur. Compared with an ordinary activated carbon desulfurization process, the process has the advantages of high hydrogen sulfide removal rate, long service life of the desulfurizer, low operation cost, simplicity in operation and management and the like.

The invention relates to a desulfurizing agent, which comprises the following compositions in percentage by weight: 40 to 90 percent of nanometer-sized zinc oxide, 5 to 50 percent of cupric oxide and 0 to 20 percent of caking agent. The method for preparing the desulfurizing agent comprises the following steps: firstly, mixing the nanometer-sized zinc oxide, the cupric oxide, the caking agent, a pore creating material and water to form a mixture, wherein the weight ratio of the nanometer-sized zinc oxide to the cupric oxide to the caking to the pore creating material is 40-90:5-50:0-20:1-10; secondly, pinching and forming the mixture to obtain a formed object; and finally, drying and baking the formed object so as to obtain the desulfurizing agent. The desulfurizing agent has high sulfur capacity, can remove sulfureted hydrogen and other sulphides with high accuracy, and realize desulfurization with high accuracy at lower temperature, thereby reducing the requirement of desulfurizing equipment on thermal resistant strength, resistance of oxidation, and the like.

The invention provides a preparation method of a medium temperature ferric oxide desulfurizer, and the active component of the medium temperature ferric oxide desulfurizer is amorphous ferric oxide of high activity. The preparation method of the medium temperature ferric oxide desulfurizer comprises the steps of directly kneading soluble ferrite, calcium hydroxide and a binder, extruding, drying and roasting. The desulfurizer obtained by using the preparation method of the invention has high content of ferric oxide, high sulphur capacity and good desulfurizing property; in addition, the preparation method of the invention has the advantages of simple process, low cost and suitability for industrialized mass production. The desulfurizer of the invention is mainly used for medium temperature desulfurization of hydrogen sulfide in chemical fertilizer industry synthesis gas.

A phthalocyanin-iron-cobalt-ammonium sulfonate as the dsulfurizing catalyst with high catalytic activity and desulfurizing efficiency (more than 99%) is prepared through preparing the sulfonated chemical from phthalic anhydride as raw material and smoking sulfuric acid as sulfonating agent, preparing phthalocyanin-iron-cobalt- ammonium sulfonate from said sulfonated chemical, ammonium molybdate as catalyst, urea, cobalt chloride and iron salt, drying, and pulverizing.

The invention relates to the technical field of ferrous metallurgy, in particular to a pre-melted desulfurizing agent for refining molten steel, which is characterized by comprising the following components in percentage by weight: 55 to 70 percent of calcium oxide, 10 to 25 percent of high alumina bauxite and 10 to 25 percent of aluminum ash. The aluminum ash is molten slag in aluminum production. A preparation method for the pre-melted desulfurizing agent comprises the following steps: grinding the components into powder of 0 to 2 millimeters, mixing the powder according to a proportion, melting the mixed powder at the high temperature of between 1,450 and 1,600 DEG C, discharging and cooling the melted mixture, and then crushing the mixture into granules of 0 to 70 millimeters to obtain the pre-melted desulfurizing agent. In the impurities, the content of SiO2 is less than or equal to 8 percent, the content of Fe2O3 is less than or equal to 1.5 percent, the content of MgO is less than or equal to 1.2 percent, the content of CaF2 is less than or equal to 3 percent, and the content of moisture is less than or equal to 0.5 percent. The pre-melted desulfurizing agent has the advantages that: (1) the melting point is low, and the melting speed is high; (2) the desulfurizing rate can reach over 60 percent; (3) the using amount of the desulfurizing agent is reduced by about 50 percent; (4) the desulfurizing agent can be used for desulfurizing molten steel and molten iron; and (5) the desulfurizing agent is fluorine-free or has micro-fluorine, and is favorable for environmental protection.

The invention relates to a method for preparing a material containing amorphous iron oxide hydroxide and two methods for regenerating the same after being used as desulfurizer. The content of the amorphous iron oxide hydroxide in the material prepared by the invention is as high as 65% to 100%, so the sulfur capacity of the material is high; and the desulfurizer in the prior art is non-regenerative or costly for regeneration, so that the desulfurizer in a large amount cannot but be dumped as waste liquid in landfills, while the amorphous iron oxide hydroxide in the material of the invention can be repeatedly regenerated and reused after the material is used as the desulfurizer, thereby solving the problems of the waste of effective resources in the original desulfurizer and the severe environmental pollution.

The desulfurizing agent is made from metal oxide (oxide of copper, zinc, iron, sodium, nickel and titanium, etc.) as main component, and can be divided into two types of DSO1 and DSO2. The preparation method of DSO1 includes the following steps: firstly, preparing carrier using Al2O3, ZnO, NiO, TiO2 and Na2O as component, the attaching the metal oxide to the carrier, and the preparation method ofDSO2 includes the following steps: mixing the metal oxide, activating agent, adhesive and pore-forming agent and making them undergo the one-step forming process to obtain the invented product. It can be used for desulfurizing and cleaning fuel gas and flue gas, and its desulfurizing efficiency can be up to 90%.