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

The invention provides a method for producing clean fuels, utilizing the relatively high temperature and pressure of the hot high-pressure separator in the existing hydrocracking process, and having the characteristics of a hydrogen-facing environment at the same time, through the upper part of the hot high-pressure separator Fill the refined catalyst bed or install a hydrofinishing reactor between the hot high-pressure separator and the cold high-pressure separator to refine the product of the hydrocracking unit and other refined hydrocarbon oils from outside the unit, with a set of hydrogenation The cracking unit can realize the effect of producing light and clean fuel products at the same time.

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 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 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 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 method and device for refining carbon-4 ionic liquid alkylation material by the aid of etherified carbon 4. The method includes: sequentially removing mercaptan from the carbon-4 raw material through a primary fiber liquid film contact reactor after impurities are filtered via a carbon-4 filter primarily and removing alkali and methanol through a secondary fiber liquid film contact reactor; removing light components including dimethyl ether through a light removal tower; further lowering the content of free water, carbonyl sulfide and H2S in the carbon-4 raw material components through an alkali solidifying tower; performing drying and dewatering through a molecular sieve drying tower; further removing methanol, dimethyl ether and MTBE (methyl tert-butyl ether) through a purification tower; performing dearsenification through a dearsenification tank to obtain the refined carbon-4 ionic liquid alkylation material. The method is unique in process design and low in energy consumption, the etherified carbon 4 of a refinery plant can be completely refined to obtain the highly refined carbon 4, and needs of the ionic liquid alkylation process are met.

The invention discloses efficient composite slag lotion which comprises the following raw materials in percentage by weight: 49-70% of calcium powder, 20-45% of aluminum ash, 5-12% of high-alumina cement and 0.5-2.0% of sodium carboxymethylcellulose. The calcium powder, the aluminum ash and the high-alumina cement are applied to synergic desulfuration, and are used for mutually filling and refining the porous structure of the slag lotion, and the obtained efficient composite slag lotion is good in deoxidation and desulfuration effect and impurity absorption effect and rapid in slagging speed, and has a remarkable function in improving the comprehensive economic benefits of steel plate companies.

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 method for oxidative desulfurization of diesel oil with a metal oxide-modified nano-iron oxide catalyst, which comprises the following steps: 1) dissolving soluble metal salt in distilled water, immersing nano-α-Fe2O3 in the solution, and ultrasonically Disperse, dry, and roast in a muffle furnace; 2) Use hydrogen peroxide-acidic reagent as the oxidation system, add hydrogen peroxide-acid oxidant and catalyst, and convert organic sulfides into sulfones and sulfoxides; 3) Separate the catalyst and Diesel oil; 4) The sulfur products in the diesel oil are mixed with the extractant, left to stand for phase separation to obtain the upper phase oil phase and the lower phase extraction phase, and the sulfur content in the diesel oil is determined with a microcoulombometer. The invention adopts a diesel oxidation desulfurization catalyst with higher selective oxidation, strong acid center and high activity to carry out oxidation desulfurization, effectively removes various sulfur compounds in diesel oil, and can achieve the purpose of deep desulfurization.

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 provides a method for refining liquefied petroleum gas. The method comprises the following steps: mixing amine-washed liquefied petroleum gas and an alcohol amine solution, and removing carbonyl sulfide and hydrogen sulfide from the liquefied petroleum gas under the coaction of a carbonyl sulfide hydrolysis catalyst and the alcohol amine solution; performing sulfur etherification reaction in contact with a sulfur etherification catalyst to ensure that mercaptan in the liquefied petroleum gas is reacted with olefin and converted into a thioether compound with a high boiling point, and simultaneously performing selective hydrogenation saturation on diolefin; performing distillation treatment, and separating the liquefied petroleum gas fraction from the thioether compound with the high boiling point to obtain a deep desulfurized liquefied petroleum gas product, wherein the refined liquefied gas can be used for producing low-sulfur methyl tertiary butyl ether and alkylation gasoline. According to the method disclosed by the invention, the carbonyl sulfide and the hydrogen sulfide are removed by adopting a one-step method, and the mercaptan is removed by using the catalytic reaction between the raw material components, so that no alkali residue is discharged, the existing process for refining the liquefied petroleum gas is simplified, meanwhile, the purpose of deep desulfurization is achieved, and the sulfur content of the refined liquefied petroleum gas is reduced to below 5mu g / g.

The invention relates to a deep desulfurization adsorbent of fuel at normal pressure and normal temperature and a preparation method thereof, and belongs to the fields of an environment-friendly absorbent material and an energy chemical material. The deep desulfurization adsorbent of the fuel is characterized in that aluminosilicate composite oxide is taken as an adsorbent carrier; rare-earth cerium modified nickel duplex metal is an active component of the adsorbent; the quality percent of the active component Ni-Ce load is 1-30%, and the molar ratio of Ni / Ce is 2-19. The method comprises the steps of: mixing, staling, extruding and molding saturated nickel-cerium composite solution, strongly acidic alumina sol gel, pseudo-boehmite, diatomite or silica sol, and preparing the absorbent by drying and roasting in reducing atmosphere. The adsorbent prepared by the invention has strong Lewis acidity, high adsorption and removal efficiency of thiophenic sulfur, excellent regenerability, high mechanical strength, good thermal stability, low price without secondary pollution, and simple preparation process. The adsorbent disclosed by the invention is preferably suitable for absorbing and desorbing the thiophenic sulfur, and is also suitable for desulfuration of JP fuel, gasoline, diesel oil and kerosene.