31results about How to "To achieve the purpose of deep desulfurization" patented technology

A process for diesel oil distillation oxidation sweetening comprises, adding in 0.1-20% diesel oil distillation volume of hydrogen dioxide and 0.1-20% acetic anhydride, reacting at the temperature of 30-90 deg. C, wherein the sulfide is oxygenized into sulfone or sulfoxide compounds, rinsing to remove acidic material, and removing sulfone or sulfoxide compounds from the diesel oil through adsorptive separation method. The catalyst has good regeneration effect and thus can be reutilized.

The invention discloses a catalyst for deep desulfuration and octane number increase for gasoline and preparation and application methods thereof. The functional catalyst comprises NiM/ZnO-ZSM-5. The preparation method comprises the steps of: firstly, synthesizing nanometer zinc oxide with high specific surface by using a low-temperature solid-phase method, then respectively steeping nickel and auxiliary metal, in the form of ions, onto the surface of the zinc oxide by using a steeping method, drying, roasting, and reducing in hydrogen to obtain a nanometer composite of the nickel, the auxiliary metal and the zinc oxide, wherein the nickel and the auxiliary metal are bonded in an alloy manner and uniformly disperse on crystalline phases of the zinc oxide. The catalyst has the reaction conditions that the reaction temperature is 350-450 DEG C, the pressure is 0.5-1.6MPa, the hydrogen-oil volume ratio is 100-300 and the air speed is 2<-10>h<-1>. By using the catalyst disclosed by the invention to treat straight-run gasoline, the deep desulfuration and the aromatization of alkane and olefin are performed at the same time, so that the octane number of a product gasoline is obviously increased.

A heteropoly acid / ordered meso-porous silicon oxide catalyst used for removing the S-contained benzothiophenium compounds from the fractional oil of petroleum is prepared through such steps as dissolving heteropoly acid in the mixture of absolute alcohol and distilled water, adding ethyl n-silicate, magnetic stirring to obtain solution A, dissolving the polyoxyethene-polyoxypropene-polyoxyethene triblock copolymer in the mixture of absolute alcohol and distilled water to obtain solution B, slowly adding B to A, magnetic stirring to obtain sol, culturing it at 38-42 deg.C for 6-8 days, pulverizing, and calcining in N2.

The invention relates to a method for desulfurization of coal by electrochemical catalytic oxidation, although the exiting coal chemical desulfurization methods can almost remove all inorganic sulfur and part of organic sulfur in the coal, most of the methods need strong acid, strong base and strong oxidants and need to be operated under the conditions of high temperature and high pressure, the process conditions are harsh and the cost is high; furthermore, a plurality of chemical methods can cause series damages to the structure and the nature of the coal. The invention discloses the method for desulfurization of the coal by the electrochemical catalytic oxidation, which comprises the following steps: (A) adopting NaI with the concentration of 1.5mol/L as supporting electrolyte, weighing a certain amount of the electrolyte, adding into an anode chamber in an electrolysis bath, simultaneously adding the supporting electrolyte in the same volume and the same composition into a cathode chamber, and well connecting a gas collecting system; (B) adding a coal sample with the particle size of below minus 200 meshes into the anode chamber of the electrolysis bath, and controlling the concentration of coal slurry at 0.05g/ml; (C) connecting with circulating water of a water bath tank, and energizing for electrolysis; and (D) filtering electrolyte solution after energizing for 4 hours, washing the coal sample, drying, weighing and carrying out sulfur, calorific value, ash content and infrared spectrum analysis. The technology is used for the coal desulfurization.

The invention provides a method for improving the shale oil hydrorefining denitrification rate, and relates to a whole fraction shale oil hydro-denitrification process. The method aims at solving the technical problems that in the existing method for producing diesel oil through shale oil hydrorefining, the stability of a diesel oil product is low, and the operation running period of a hydrorefining catalyst is short. According to the method, a raw material pretreatment unit 1, a raw material pre-fractionation unit 2, a primary hydrorefining reaction unit 3, a secondary hydrorefining reaction unit 4 and a product fractionation unit 5 are used. When the method provided by the invention is used for processing shale oil, the light oil yield is high; the nitrogen content of the diesel oil product is low; the chromaticity and the stability conform to national V standard requirements; the goal of light oil product deep denitrification can be achieved; the service life of the hydrorefining catalyst is prolonged; the operation running period of the catalyst is improved. A main product of the method is hydrorefining diesel oil; byproducts are high-value LPG and hydrogenated naphtha; heavy shale oil and hydrogenation tail oil thrown out in the technical process can be further processed and used in a downstream device. The method provided by the invention belongs to the field of whole-fraction shale oil deep processing.

The present invention relates to a method to remove sulphur in gasolene by using electrochemistry measure, which comprises the following procedures: first mix gasolene with an electrolytic system that consists of polar solvent, supporting electrolyte and water and place the mixture into an isolated electric tank for electrolysis, then settling separate fat phase and electrolytic system phase, electrolytic oxidation product of sulfur-containing compound of gasoline enter into electrolytic system phase to be removed; volume ratio between gasolene and electrolytic system is 0.5-2; electrolytic temperature range is from 40 DEG C to 50 DEG C; supporting electrolytes/ polar solvent is 0.1-2mol/L; volume ration between water and dissolvent is 0.1-1; polar solvent is one of acetic acid and ethyl hydrate or the mixture; supporting electrolytes is sodium chloride or sodium acetate; water is used to provide oxygen source in the process; operation condition is mild; dissolvent and supporting electrolytes can be used for periodic duty in electrolytic process; zero discharge can be realized primarily; hydrogen gas is produced secondarily; octane ratio lowing down problem because of hydrogenation in oil-extraction plant gasoline catalysis and cracking process can be solved.

The invention provides a deep desulfurization catalyst and a preparation method and application thereof. The preparation method of the deep desulfurization catalyst includes: weighing ammonium paramolybdate and cobalt acetate tetrahydrate, dissolving into glacial acetic acid and water mixed solution, stirring to dissolve, adding hydrazine sulfate, stirring to dissolve, performing stirring reactionin a constant-temperature water bath to obtain a cobalt-molybdenum heteropoly compound after reaction is finished; dispersing the cobalt-molybdenum heteropoly compound into water, ultrasonically treating, adding aluminum oxide, well stirring, and performing hydrothermal load dispersion in an autoclave to obtain the desulfurization catalyst after reaction is finished. The desulfurization catalystis high in dispersion performance and activity, deep desulfurization can be realized, and the desulfurization rate is up to 94.1%.

The invention discloses a hydroxyl functionalized heteropolyacid catalyst as well as a preparation method and an application thereof. The cationic structure of the hydroxyl functionalized heteropolyacid catalyst contains hydroxyl. Preferably, the hydroxyl functionalized heteropolyacid catalyst has the structure shown in the description, wherein R1 is C2-C45 alkyl, R2, R3 and R4 are selected from C1-C25 alkyl or hydroxyalkyl, at least one of R2, R3 and R4 contains hydroxyl, Zn- is heteropolyacid radical, and n is any integer of 1-8. The hydroxyl functionalized heteropolyacid catalyst can be used in the oxidative desulfurization process, for example, the sulfur content of fuel can be decreased to 70% or below at the normal temperature while the quality indexes such as olefin content, octanenumber and the like of fuel are not affected, besides, and the hydroxyl functionalized heteropolyacid catalyst can still keep 50% desulfurization efficiency or above after being recycled.

The invention relates to a method and device for removing hydrogen sulfide in shale gas with high sulfur content, and particularly relates to a method for removing hydrogen sulfide in shale gas with high sulfur content. The method comprises the following steps of (1) filtering and separating the shale gas with high sulfur content to remove contained solid particles and liquid drops in the shale gas; (2) sequentially carrying out primary amine desulfuration and secondary amine desulfuration on the filtered shale gas with high sulfur content, wherein the desulfuration process intensification and amine solution removal coupling operation is realized by using a rotational flow field provided by a micro rotational flow in an amine desulfuration process, and a desulfurized shale gas product which does not contain amine liquid drops is obtained; (3) carrying out flash distillation on an amine rich solution to remove light hydrocarbon, and then, regenerating an amine solution to ensure that the amine solution can be recycled, wherein the amine solution is obtained in the amine desulfuration process. The invention also provides a device for removing hydrogen sulfide in shale gas with high sulfur content.

The invention provides a catalyst for selective oxidation desulfurization of fuel oil as well as a preparation method and an application of the catalyst. The catalyst for selective oxidation desulfurization of fuel oil comprises the following raw materials: 80wt%-95wt% of polybenzimidazole and 5wt%-20wt% of heteropoly acid, wherein the total amount of the raw materials of the catalyst for selective oxidation desulfurization of fuel oil is 100wt%. The invention also provides a preparation method of the catalyst for selective oxidation desulfurization of fuel oil. The catalyst for selective oxidation desulfurization of fuel oil prepared by the method, has the advantages of high catalytic desulfurization efficiency when the catalyst is used for catalyzing the selective oxidation desulfurization of fuel oil and can also be recycled.

The invention relates to a UiO-66-based third-class porous ionic liquid, which is prepared from a metal organic framework (UiO-66) and an ionic liquid ([Omim] [NTF2]) as raw materials, the preparation process is simple and environment-friendly, and the porous ionic liquid has better oxidation removal effect and conversion effect on thiophene sulfides in oil products, especially dibenzothiophene (DBT), and has better oxidation removal effect and conversion effect on thiophene sulfides in oil products. In the oxidative desulfurization process of diesel oil, deep desulfurization can be realized after a very small amount of hydrogen peroxide (H2O2, 30%) is added.

The invention belongs to the technical field of metallurgical and chemical processes, and particularly relates to a treatment system for smelting high-sulfur-content tailings. The treatment system for smelting the high-sulfur-content tailings comprises a raw material supply system, a pretreatment system, a reaction system, a smoke treatment system and a dry material bin. According to the treatment system for smelting high-sulfur-content tailings, the process is smooth, the structure is complete, and the requirement for large-scale continuous treatment of various types of high-sulfur-content tailings and mixtures of the high-sulfur-content tailings can be met; and the problems that a large quantity of solid tailings accumulate and valuable metal cannot be recovered easily are solved.

The invention discloses an adsorptive desulfurization technology for liquefied petroleum gas. At least two fixed bed reactors are adopted. The method comprises the steps as follows: the liquefied petroleum gas is firstly sent into the fixed bed reactors filled with adsorbents for adsorptive desulfurization reaction; when the adsorbent reaches an adsorption saturation state, the liquefied petroleumgas is transferred to another fixed bed reactor filled with the adsorbent for adsorptive desulfurization reaction continuously, and hydrogen is introduced into the fixed bed reactor filled with the adsorbent reaching adsorption saturation for regeneration. The adsorptive desulfurization technology has the advantages that no alkali residues are discharged, desulfurization precision is high and thelike, and organic sulfide can be removed from the liquefied petroleum gas.

The invention provides a catalytic oxidation electrolytic desulfurization method for light oil. The method is mainly characterized in that: an electrolytic system composed of a solvent, an oxidant, acatalyst, an electrolyte and water is mixed in an electrolytic tank for electrolysis, a carbon graphite plate serves as the positive electrode, a stainless steel plate serves as the negative electrode, settling separation of an oil phase and the mixed system is carried out, and an electrolytic oxidation product of a sulfur compound in the oil is subjected to electrolytic system removal. The methodhas the advantages that: water supplies the oxygen source for reaction, no external supply of hydrogen and oxygen is not needed, the operation is mild, the process is carried out under low temperature and atmospheric pressure, the solvent supports the recycling of the electrolyte in the electrolysis process, and at the same time zero emission is achieved. The by-product is hydrogen, is free of polluting gas, can achieve up-to-standard discharge, or the hydrogen can be recovered, thus reaching the purpose of deep desulfurization.