74results about How to "Improve coking" patented technology

Gas oil components, coking process recycle, and heavier hydrocarbons are cracked or coked in the coking vessel by injecting an additive into the vapors of traditional coking processes in the coking vessel. The additive contains catalyst(s), seeding agent(s), excess reactant(s), quenching agent(s), carrier(s), or any combination thereof to modify reaction kinetics to preferentially crack or coke these components. The quenching effect of the additive can be effectively used to condense the highest boiling point compounds onto the catalyst(s), thereby focusing the catalyst exposure to these target reactants. With a catalyst to crack these highest boiling point materials, this mechanism can effectively increase the catalyst's selectivity, thereby increasing its efficiency and reducing catalyst requirements and costs. Selective, catalytic conversion of the highest boiling point materials in the coking process product vapors (coker recycle and/or ‘heavy tail’ of the heavy coker gas oil) may be accomplished with an exemplary embodiment of the present invention in varying degrees. Exemplary embodiments of the present invention can also provide methods to control the (1) coke crystalline structure and (2) the quantity and quality of volatile combustible materials (VCMs) in the resulting coke. Pet coke from this process may have unique characteristics with substantial utility.

Gas oil components, coking process recycle, and heavier hydrocarbons are cracked or coked in the coking vessel by injecting an additive into the vapors of traditional coking processes in the coking vessel. The additive contains catalyst(s), seeding agent(s), excess reactant(s), quenching agent(s), carrier(s), or any combination thereof to modify reaction kinetics to preferentially crack or coke these components. Modifications of the catalysts in the additive improve performance for certain desired outcomes. One exemplary embodiment of the present invention uses the olefin production capabilities from newly developed catalysts to increase the production of light olefins (e.g. ethylene, propylenes, butylenes, pentenes) for alkylation process unit feed, the production of oxygenates, and petrochemical feedstocks, such as plastics manufacture. Another exemplary embodiment of the present invention is the use of the olefin production from newly developed catalysts to improve the coker naphtha quality. A third exemplary embodiment of the present invention uses the cracking characteristics of newly developed catalysts to optimize the production of light gas oils, naphtha, and gases from the coking process.

The invention discloses a high-temperature-resistant methanation catalyst as well as a preparation method thereof. According to the catalyst, Al2O3 is used as a carrier, Ni is used as a primary active component, La and Ce are used as secondary components, and metallic oxides of Mn, Co, Fe, W or Mg are used as other active auxiliaries; the preparation method of the catalyst comprises the following steps: carrying out ultrasonic dispersion and coprecipitation on the primary active component Ni and a PEG (polyethylene glycol)-aqueous solution of a carrier precursor, and separating, drying and roasting to obtain a NiO-Al2O3 catalyst; then, loading the secondary components La and Ce and precursors of the active auxiliaries to the NiO-Al2O3 catalyst by adopting an incipient-wetness impregnation method; finally, roasting and carrying out reduction activation to obtain the high-temperature-resistant methanation catalyst; the catalyst has high specific surface area, and can reduce carbon deposition reaction and improve the selectivity of methane. The high-temperature-resistant methanation catalyst can maintain relatively high methanation catalytic activity for a long time at high temperatures and can be widely applied to a methanation process under a high-temperature environment.

The invention relates to a Zhundong coal additive and provides an additive for improving Zhundong coal combustion and coking characteristics and a use method thereof. The additive comprises, by mass, 20-36% of SiO2, 8-18% of Al2O3, 12-28% of MnO2, 6-23% of Fe2O3, 4-10% of KMnO4, 5-15% of Fe(NO3)3, 1-5% of TiO2 and 2-4% of a waterproof adhesive. The additive of Zhundong coal can be prepared by simple processes, has a low cost, can be transported, stored and used conveniently, can well improve Zhundong coal combustion, coking, slag-bonding and dust deposition characteristics, can effectively improve a blending combustion ratio of Zhundong coal, and has no side effect on fire coal equipment, no damage on the human body and no pollution on the environment.

The invention relates to a method for adopting waste derivative oversize material as substitute for cement kiln fuel, which is characterized in that the domestic waste in refuse reclamation station is separated and sorted, broken in packages, crushed and completely stirred and mixed, one part of the waste enters a precombustion furnace in the kiln tail of a cement kiln for combustion, while the other part of the waste enters the cement kiln from the kiln hood for combustion, thus the substitute fuel for cement production is produced. The invention has the advantages that the waste derivative oversize material having calorific value is adopted to substitute for industrial fuel in the cement kiln, thus resources of waste derivative oversize material are fully utilized, and coal energy resources are saved; simultaneously the cement kiln has the characteristics of high temperature, large carrying capacity, no residue after waste treatment and no secondary pollution, therefore the invention has the great advantages of energy saving and environmental protection.

The invention belongs to the field of biomass energy utilization, and discloses a preparation method of biomass-based porous carbon and a product. The method comprises the following steps: S1, mixingbiomass particles and an organic potassium salt or an organic sodium salt, heating and drying a mixture to obtain a porous carbon precursor; S2, heating, pyrolyzing and carbonizing the porous carbon precursor in an inert atmosphere, and then performing heat preservation; S3, performing acid pickling on the mixture, removing an alkali metal salt, then filtering and flushing the mixture with an excessive amount of deionized water till the filtrate is neutral, and performing drying to obtain the biomass-based porous carbon. The invention further discloses a corresponding product. According to thepreparation method, the preparation conditions are adjusted, the biomass is subjected to catalytic carbonization by adopting an activating agent, and the activating agent catalyzes the carbonizationand coking of the biomass, and is fully in contact with coke particles for further activation to generate micropores in order to obtain the biomass-based porous carbon with a large specific surface area. The method is simple, is a green and sustainable preparation method, and has wide applicablity for different saccharides and lignocellulose biomass raw materials.

The invention provides a high-temperature chain oil composition and a preparation method thereof. The high-temperature chain oil composition includes: (a) synthetic ester base oil; (b) alkoxy phosphate anti-wear reagent at extreme pressure; (c) oiliness agent; (d) viscosity index improver; (e) antioxygen; and (f) anticorrosive, wherein the (a) synthetic ester base oil is a mixture of dipentaerythritol ester and aromatic ester. The high-temperature chain oil composition is adapted to using at high temperature, has good high-temperature performance, has no carbon deposition residual working at high temperature for a long time, is without dripping, has good wear-resisting anti-attrition and corrosion resistant performances, and has low friction coefficient and small chain abrasion. Moreover, the high-temperature chain oil composition has low toxicity, is easy to decompose, and is environmentally friendly.

The invention provides an energy-saving method of an oxygenized air mixed blowing supporter combustion boiler and equipment used by the method, belonging to an energy-saving and emission-reduction combustion technology of the boiler; the invention more particularly relates to an efficient energy-saving combustion technology combining oxygenized air technology and supporter combustion technology and equipment thereof; the effects of energy-saving and emission-reduction of the invention are different according to the different running situations and equipment of the boiler (kiln); the statistics obtained from the cases studies of dozens of boilers and kilns proves that the lowest coal-saving ratio is 5.7%, the highest coal-saving ratio is 25%, and the coal-saving ratio of a pulverized coal fired boiler of 670t/h in a thermal power plant is 8.34%, so that the statistical data shows that the effects of energy-saving and emission-reduction of the technical improvement measure are excellent, the technology can be widely popularized, and good social and economical benefits can be brought about.

The present invention relates to a coking depressor for an ethylene cracking furnace, and a method for using the same. The depressor consists of a thiol compound, a quinoline compound, a disalicylic acid compound and an organic solvent. The coking depressor not only overcomes the shortcomings in the prior depressor that the manufacturing cost is high, the injection operation is difficult, the distribution in the cracking furnace tube is uneven, and the depressor erodes the inner wall of the furnace tube, etc., but also effectively prolongs the service life of the cracking furnace and improves the yield of ethylene, the usage of the material and the load of an ethylene device. The producing amount of CO and CO2 is largely reduced, and thus the depressor is safe and environment-friendly.

The invention discloses a hydrotreating method of an inferior gasoline raw material. The method comprises the following steps: mixing inferior gasoline with thermal loaded oil and circulating hydrogen, allowing the mixture to enter a fluidized bed hydrogenation pretreatment reactor; separating the effluent of the hydrogenation pretreatment to obtain gas and liquid; returning the liquid as thermal loaded oil to the pretreatment reactor, allowing the gas to pass through a gasoline hydrotreating reactor in an upward flow manner; performing gas-liquid separation of the gasoline hydrogenation effluent in a low temperature low pressure separator, purifying the obtained hydrogen-rich gas for recycle, and performing gas stripping of the obtained liquid so as to be used as a gasoline blending component or a chemical raw material. The method of the invention greatly prolongs the running period of the inferior gasoline hydrotreating device.

The invention provides a preparation method of a high-speed polyester POY (Pre-Oriented Yarn) spinning oil agent. A pure oil agent except for water in the oil agent is composed of a main body part and an additive, wherein the main body part includes over 20 kinds of polyether compounds and the rest components belong to non-polyether additive. The preparation method comprises the following steps: firstly, metering the main body component of the oil agent, pumping the main body component into a reaction kettle in vacuum, stirring, heating to 50-70 DEG C, stirring, metering the additive components and water, and adding the metered additive components and water into the reaction kettle, stirring, heating to 70-80 DEG C, keeping the temperature for 40-50min, closely filter-pressing a product, and subpackaging the product after the product is checked to be qualified. The oil agent prepared by using the method provided by the invention is suitable for high-speed polyester POY spinning and a production process of a subsequent deform yarn; the oil agent endows the fiber good smoothness and bundling and favorable total viscosity-temperature and viscosity-concentration characteristics; the fiber is few in broken filament breaks, even and uniform in dyeing in the later drafting process; the smoke formation amount of a hot processing tank is small, generated white powder and coke amount are small and the cleaning period is long; a product is good in quality and stability.

The method of treating waste water from propylene oxide production adopts multi-effect evaporator and includes the following steps: multi-effect evaporating waste water to obtain concentrated waste water; crystallizing concentrated waste water to obtain calcium chloride crystal; centrifugally separating the calcium chloride crystal from waste water; and finally condensing to recover waste water steam. The present invention also discloses the structure of the multi-effect evaporator.

The invention relates to a method for improving thermal cracking of heavy oil in sub (ultra) critical water. A radical initiator is introduced to improve the thermal cracking of heavy oil in the sub (ultra) critical water. Preferably, the heavy oil is selected from one or more of vacuum residuum, pitch and catalytic cracking slurry oil. The radical initiator is selected from one or more of elementary iodine, peroxide initiator and azo initiator. The thermal cracking temperature is 360-390 DEG C, the initial mass ratio of the heavy oil to the water is 2:1-1:4, the addition of the radical initiator is 5*10<-3>-20*10<-3> of the mass fraction of the heavy oil, and the thermal cracking is in intermittent or continuous operation mode. An ultrahigh reaction temperature threshold of the thermal cracking of the heavy oil at an induction period can be balanced, so that the thermal cracking of the heavy oil can be carried out under a mild condition, the distribution of cracked liquid phase products is improved, and at the same time coking is effectively suppressed. The operation is simple, the cost is greatly reduced, and the method is conductive to industrial production.

The invention relates to a feed method for coal tar. After the pressure of a coal tar raw material is boosted by a hydrogenation reaction raw material booster pump, the coal tar raw material enters a hydrogenation reactor without any indirect heat exchange; and before the pressure of the coal tar raw material is boosted, the coal tar raw material can be hot stream from a fractionating tower. The method can avoid a high-pressure heat-exchange temperature-rise process of the coal tar, eliminate the problem of fouling of high-pressure coal tar heat exchangers, reduce the hydrogenation catalyst bed pressure drop, slow down the coking, and prolong the operation cycle.

The invention belongs to the technical field of conductive carbon black materials and relates to a method for improving coking on the inner wall of an acetylene carbon black cracking furnace. The furnace body of the acetylene carbon black cracking furnace is divided into a reaction area and a cooling area from top to bottom; acetylene is subjected to a thermal cracking reaction in the reaction zone. According to the method of the invention, the discharging port of the cracking furnace is communicated with a gas reflux system, so that the gas reflux system refluxes hydrogen generated by cracking into the reaction zone, so that a gas curtain can be formed at a position close to the inner wall of the furnace, and therefore, the acetylene and cracking intermediate products can be prevented from coking on the inner wall of the reaction zone. According to the gas reflux system, the hydrogen generated by the cracking reaction of the acetylene can be utilized and re-sprayed to the inner wall surface of the reaction zone of the cracking furnace; and a protective gas isolation layer is formed between the furnace inner wall of the reaction zone of the cracking furnace and the acetylene atmosphere, so that the acetylene and the cracking intermediate products are prevented from contacting with the inner wall of the furnace body with relatively low temperature to form coking.

Disclosed is a hydrofining catalyst comprising: an inorganic refractory component comprising a first hydrodesulfurization catalytically active component in a mixture with at least one oxide selected from the group consisting of alumina, silica, magnesia, calcium oxide, zirconia and titania; a second hydrodesulfurization catalytically active component; and an organic component comprising a carboxylic acid and optionally an alcohol. The hydrofining catalyst of the present application shows improved performance in the hydrofining of distillate oils. Also disclosed are a hydrofining catalyst system comprising the hydrofining catalyst, a method for preparing the catalyst and catalyst system, and a process for the hydrofining of distillate oils using the catalyst or catalyst system.

The invention relates to a deoxidation catalyst for an oil product, a preparation method thereof and a catalytic hydrogenation method for removing dissolved oxygen in the oil product by adopting the catalyst. The deoxidation catalyst for the oil product takes gamma-alumina which has the specific surface area of between 50 and 300m<2>/g and the pore volume of between 0.2 and 2.0cm<3>/g as a carrier, palladium supported on the carrier as a main catalytic element, and one of silver, tin and lead as a co-catalytic element; and the preparation method thereof comprises two steps of the preparation of the alumina carrier and the preparation of the catalyst. The catalytic hydrogenation method for removing the dissolved oxygen in the oil product by adopting the catalyst comprises the following steps that: the oil product is fully mixed with hydrogen before the oil product enters a hydrogenation reactor; and then the mixed oil product enters the reactor and is contacted with the deoxidation catalyst. The catalyst has high strength and good deoxidation stability, can still have higher activity under lower temperature and pressure, can keep higher reaction activity for a long time, and ensure that the removal rate of trace oxygen in the oil product can reach over 90 percent.

The invention aims to provide a device and a method for online removal of coke powder from tower-top oil gas. The device and the method can effectively reduce the coke powder to enter a fractionatingtower and block a tower tray, and can avoid coking products from carrying the coke powder to enter a downstream device; thus, the catalyst activity of a downstream refining device and the long-periodoperation of the device are influenced. The device comprises a cyclone separator and a coke powder discharging system, wherein the cyclone separator comprises a separator tank body and a plurality ofcyclone single pipes; the plurality of cyclone single pipes are connected with and mounted in the separator tank body through supporting plates; the coke powder discharging system comprises a coke powder bin and a pressure balance pipe; the top part of the coke powder bin is connected with the bottom part of the cyclone separator through a star-shaped valve and a first gate valve; the pressure balance pipe is connected with the upper part of the coke powder bin, so the coke powder bin is connected with an oil-gas pipeline; the bottom part of the coke powder bin is connected with a discharge gate valve; and a pressurized gas inlet is also arranged at the upper part of the coke powder bin.

According to one or more embodiments disclosed herein, a mesoporous zeolite may be made by a method comprising contacting an initial zeolite material with ammonium hexafluorosilicate to modify the framework of the initial zeolite material, and forming mesopores in the framework-modified zeolite material. The contacting may form a framework-modified zeolite material. The mesoporous zeolites may be incorporated into catalysts.

The invention relates to a boiler combustion optimization adjusting method. The boiler combustion optimization adjusting method comprises that a wing wall is vertically provided with four ventilation slits, secondary air is blown into the wing wall, water-wall tubes on the wing wall have the external diameter of 120.65 mm, the center distance of 146.4 mm and the tube spacing of 25.4 mm, and tubes on the upper and lower parts of the wing wall have the external diameter of 69.85 mm; in an original design, the water-wall tubes are connected with the tubes through reducer pipes, thick tubes on four ventilation bands needing ventilation are replaced by thin tubes, i.e., large and small heads on the upper portion are moved down, the tube spacing is 76.55 mm, the height of the ventilation bands are set to be the total length of the tubes of the wing wall or the ventilation bands are only arranged on the upper half part of the wing wall, and a refractory belt on a tube at each of the two sides of a ventilation slot is removed. According to the invention, the original wing wall no longer has large coke and only has loose coke the thickness of which is smaller than 50 mm, and has no threat to safe operation of a machine set. The coking conditions of the front and rear walls are greatly improved, and the coke thickness is obviously reduced. The NOx discharge amount is also reduced.

The invention provides a catalyst for synthesis of acetonitrile by ammoniation of acetic acid and a preparation method thereof. The catalyst is porous spherical alumina containing transition metal or rare earth metal oxide, and the crystal form of alumina is a mixed crystal phase of one or two of gamma type or delta type. The preparation method comprises the following steps of: mixing powder prepared by neutralizing aluminum sulfate and sodium metaaluminate with pseudo-boehmite, then mixing the obtained mixture with transition metal, rare earth metal salts and a pore-enlarging agent, preparing small balls by using an oil ammonia column balling method, activating and roasting to obtain porous spherical aluminum oxide containing transition metal and rare earth metal oxide, and then hydrating the obtained aluminum oxide and drying to obtain the catalyst. A small amount of transition metal, rare earth metal and other auxiliaries are added in the preparation process of the catalyst, so that the stability of the catalyst is improved, the catalytic reaction temperature is greatly reduced, the coking condition of the catalyst is improved, the service life of the catalyst is prolonged, and the activity and selectivity of the catalyst are improved.