20 results about "Slurry reactor" patented technology

1. A method for transitioning two different catalysts during the production of a polypropylene homopolymer or copolymer in a sequential multi-stage polymerization reaction, said method comprising: a) polymerizing propylene and optionally a comonomer in the presence of a first catalyst in a multi-stage polymerization reactor system comprising a prepolymerization reactor followed by a slurry reactor and then a gas phase reactor; b) discontinuing the supply of the first catalyst to the prepolymerization reactor; c) subsequently introducing propylene, optionally a comonomer, and a second catalyst into said prepolymerization reactor, and further introducing an aluminum alkyl into said polymerization reactor simultaneously with said introduction of said second catalyst; d) polymerizing propylene and optionally a comonomer in the presence of a second catalyst in said multi-stage polymerization reactor system. The process includes the steps of: wherein the first catalyst is a Ziegler-Natta catalyst and the second catalyst is a single-site catalyst; and wherein the amount of aluminum alkyl supplied in step c) is 0.5 to 10.0 g per ton of total propylene supplied into the prepolymerization reactor and the slurry reactor in steps c) and d). The method.

The invention discloses a novel slurry bed reactor and a reaction method. The novel slurry bed reactor comprises a reactor shell, a spiral filler, a fluid distribution device and a reactor base. The core of the invention lies in that the spiral filler can promote liquid to be condensed to form a liquid bridge, and the liquid bridge flows downwards along a spiral track, so that a unique semi-constrained liquid flowing mode is constructed. In the mode, gas-phase molecules firstly realize efficient mass transfer at the spiral liquid film and then diffuse to the surface of the catalyst for reaction. The design effectively solves the problems of low mass transfer efficiency, high pressure drop, non-uniform fluid distribution, serious flow back mixing and the like of the traditional slurry bed, and obviously improves the reaction performance. The reactor integrates a distribution and temperature control system, and is suitable for various catalytic reactions and gas-liquid mass transfer strengthening processes.

The invention discloses a preparation method of a catalyst for producing biological aviation kerosene by using high alcohol as a raw material and adopting a slurry reactor. The preparation method comprises the following steps: (1) respectively dissolving a nickel source and an organic amine source in methanol; slowly dripping the methanol solution of the organic amine source into the methanol solution of the nickel source under stirring; after dropwise adding, heating and carrying out reflux reaction for 30-90 minutes; filtering while hot, washing with methanol, collecting solid, and drying in vacuum to obtain the organic nickel catalyst. (2) respectively acidifying aqueous solutions of an organic amine source and a molybdenum source with diluted hydrochloric acid until the pH is 2-4; slowly dripping the acidified organic amine source into the acidified molybdenum source under stirring; after dropwise adding, stirring and reacting for 30-90 minutes; filtering, washing, collecting solids, and drying in vacuum to obtain the organic molybdenum catalyst. And (3) compounding the organic nickel catalyst and the organic molybdenum catalyst according to the mass ratio of 1: (1-10) to obtain the catalyst. The catalyst is simple in preparation process and low in energy consumption, and has high catalytic activity and high hydrodeoxygenation selectivity when being used for producing biological aviation kerosene by using high-carbon alcohol as a raw material and adopting a slurry reactor.

The application belongs to the technical field of CO2 capture and utilization, and provides a method and device for impurity separation-high-efficiency mineralization-solid-liquid separation of calcium-based solid waste. The method comprises an impurity separation device, an efficient mineralization device and a solid-liquid separation device. The calcium-based solid waste is purified by using the primary separation device and the slurry reactor to remove floating coke powder impurities and remove silicon-iron impurities by magnetic separation. The calcium-based solid waste after primary purification is mixed with water from the water tank in the slurry reactor by stirring to form calcium-based solid waste slurry and release calcium ions. The calcium-based solid waste slurry is introduced into the mineralization reactor with CO2 to complete the mineralization reaction and form CaCO3 suspension. The suspension is introduced into the plate and frame filter press for solid-liquid separation to obtain CaCO3. The gas-liquid-solid three-phase reaction occurs simultaneously, the process flow is simple, the time consumption is short, the efficiency is high, the equipment investment and operation cost are low, the reagent can be recycled, there is no secondary pollution, the production energy consumption is low, the product quality is good, carbon emission reduction can be realized, and the like.

The invention relates to the technical field of petrochemical engineering, and particularly discloses a device for automatically cleaning a slurry reactor coke block filter and a control method thereof.The device comprises a filter A and a filter B which are redundant backups for each other, the filter A is communicated with a slurry inlet pipe through a first liquid inlet pipeline, and the filter A is communicated with a slurry outlet pipe through a first liquid outlet pipeline; the first liquid inlet pipeline is provided with a first cleaning assembly connected with the filter A in parallel, the filter B is communicated with the slurry inlet pipe through a second liquid inlet pipeline, the filter B is communicated with the slurry outlet pipe through a second liquid outlet pipeline, and the second liquid inlet pipeline is provided with a second cleaning assembly connected with the filter B in parallel. The state of the filter is monitored through pressure and temperature, automatic cleaning is carried out in combination with a control system, the filter is prevented from being blocked, the shutdown frequency is reduced, the energy efficiency is improved, the service life of equipment is prolonged, and the risks of leakage and scalding caused by disassembly of a high-temperature and high-pressure flange by maintenance personnel are reduced; and the risk of sealing surface damage caused by flange dismounting at high-temperature parts is reduced.

Methods for operating a polymerization reactor system are described, and these methods include the steps of contacting a transition metal-based catalyst system with an olefin monomer and an optional olefin comonomer in the polymerization reactor system comprising a loop slurry reactor and a reactor circulating pump under polymerization conditions to produce an olefin polymer; measuring a kW power consumption of the reactor circulating pump to generate power consumption versus time data; converting the power consumption versus time data using frequency analysis to generate intensity versus frequency data at a first frequency interval encompassing a time equal to one-half an average recirculation period in the loop slurry reactor, and intensity versus frequency data at a second frequency interval encompassing a time equal to the average full recirculation period in the loop slurry reactor; and reducing a production rate of the olefin polymer in the loop slurry reactor when a total of a first peak intensity at the first frequency interval and a second peak intensity at the second frequency interval is equal to 10,000 or more, or when the rate of change of the first peak intensity or the rate of change of the second peak intensity is equal to 5,000 / hr or more.

In some embodiments, a process for producing propylene homopolymer or copolymer includes polymerizing propylene and optionally one or more comonomers selected from the group consisting of one or more C2 or C4-C20 alpha-olefins, by introducing the propylene, optionally the one or more C2 or C4-C20 alpha-olefins, and optionally hydrogen, with a catalyst system comprising a catalyst compound and an activator, in solution, gas phase, or slurry reactor, in series, or in parallel, at a reactor pressure of about 0.05 MPa to about 1,500 MPa and a reactor temperature of about 30°C to about 230°C to form the propylene homopolymer or copolymer. The catalyst compound is represented by Formula (I) wherein R9, R10, R11, R12, R13, R14, R15, and R16 are each independently hydrogen or a substituted or unsubstituted C1 to C20 hydrocarbyl group, wherein optionally R9 and R11 combine to form a substituted or unsubstituted divalent methylene or divalent ethylene group.

The utility model relates to the technical field of petrochemical engineering, in particular to slurry bed residual oil hydrogenation fractionation equipment which comprises a slurry fractionating tower, a slurry feeding pipe and a hydrogen injection pipe are arranged on the side face of the slurry fractionating tower, the hydrogen injection pipe is located below the slurry feeding pipe, and a hydrogen distributor is arranged in the slurry fractionating tower. And the hydrogen distributor is connected with the hydrogen injection pipe. According to the utility model, hydrogen is uniformly sprayed out, is in uniform contact with materials and gradually rises, so that the temperature of the materials at the bottom of the slurry fractionating tower can be reduced, high-temperature dehydrogenation and polycondensation reaction can be relieved, meanwhile, the inner wall of the tower is purged, slurry coking in slurry reactor residual oil hydrogenation fractionating equipment can be inhibited, and stable and long-term operation of a slurry fractionating system is realized.

A system including a slurry reactor configured to receive an acetylene-rich gas stream and a hydrogen stream as one stream or as separate streams flowing upwards and a slurry catalyst comprising catalyst particles and a liquid solvent flowing downwards, wherein the liquid solvent extracts acetylene in the acetylene-rich gas stream and hydrogen in the hydrogen stream and at least a portion of the acetylene is converted to ethylene in the presence of the slurry catalyst and the hydrogen under hydrogenation reaction conditions to generate an acetylene-lean gas effluent and a spent slurry catalyst including spent catalyst particles and the liquid solvent.

This invention relates to the field of storage device technology and relates to an AMPS (Ammonium Metal Pulsat) production slurry reactor. It includes a reactor body with a vertically rotating column inside. Several layers of stirring and heat exchange plates are arranged side-by-side from top to bottom on the rotating column. Each layer of stirring and heat exchange plates has several heat exchange cavities within it. Independent flow channels for the heat exchange medium are opened within the rotating column, each connecting to a heat exchange cavity in each layer. The heat exchange cavities within the same layer are interconnected. This invention solves the problem in traditional reactors where, with continuous material addition, the material at the bottom reacts first, producing an exothermic reaction. Due to the limitations of existing stirring structures, it is impossible to quickly exchange heat with the material at different levels based on their reaction temperatures, thus affecting the reaction efficiency.

The present application relates to a kind of preparation methods of ultra-high molecular weight polyethylene, comprising the following steps: S1, in slurry reactor, diluent, polyethylene catalyst, co-catalyst and raw materials including ethylene are added, ethylene polymerization is carried out, and the slurry material after reaction is obtained;S2, the slurry material after reaction obtained in S1 is concentrated, then is added in the stirring vessel containing aqueous solution and is washed once;S3, the material after washing once in S2 is added in the stirring vessel containing pure water and is washed twice, then is dehydrated and dried, and the ultra-high molecular weight polyethylene is obtained, as product output.Compared with prior art, the present application greatly improves the cleanliness of ultra-high molecular weight polyethylene product by optimizing the resin preparation process.

The invention discloses a heavy oil slurry bed hydrocracking method, which comprises a heating furnace, a slurry bed reactor, a circulating pump, a circulator, a cooler, a hot separator, a cold separator and a product fractionating tower, the hot separator is provided with a circulating pump, thereby effectively reducing temperature difference in the reactor. Compared with the conventional scheme of arranging cold hydrogen, the invention can reduce the flow of the circulator, lower the differential pressure of the reaction system and lower the overall energy consumption of the device. The bottom of the slurry bed reactor is provided with a mixed feed inlet, a hydrogen distributor and a circulating oil distributor, under the comprehensive action of the scheme, the two-phase mixing effect in the reactor is greatly enhanced, and the overall heavy oil conversion rate is increased.

Disclosed are systems and processes for distributing reactor coolant flow to the cooling jackets of a loop slurry reactor, where the reactor coolant is used to control the temperature of the loop slurry reactor in olefin polymerization. Also disclosed are systems and processes for controlling the temperature of the reactor coolant that is used for cooling olefin polymerization reactors, which can be used in combination with traditional coolant distribution regimes and in combination with the coolant distribution systems and processes that are disclosed herein.

The invention belongs to the technical field of petrochemical engineering, and relates to a method for increasing the yield of heavy naphtha by adopting a slurry bed hydrogenation device. According to the method, normal-pressure fractionation is carried out on the mixed oil obtained after the hydrogenation reaction of the slurry reactor, on the premise that an atmospheric tower is not transformed, operation parameters are optimized and adjusted, and gas-liquid phase distribution and product cutting points in the tower are changed, so that more C11 and part of suitable components in diesel oil fractions are transferred into heavy naphtha fractions, and the yield of heavy naphtha is increased; meanwhile, the quality control index of the heavy naphtha is changed from traditional final boiling point control to control based on specific component content, so that the heavy naphtha after yield increase meets the feeding requirements of subsequent naphtha hydrogenation and reforming devices.

A method for upgrading pyrolysis oil includes contacting a pyrolysis oil feed with hydrogen in the presence of a mixed metal oxide catalyst in a first slurry reactor, where: the pyrolysis oil feed comprises multi-ring aromatic compounds comprising greater than or equal to sixteen carbon atoms, and contacting the pyrolysis oil feed with hydrogen in the presence of the mixed metal oxide catalyst in the first slurry reactor to convert at least a portion of the multi-ring aromatic compounds in the pyrolysis oil feed to light aromatic compounds comprising di-aromatic compounds, tri-aromatic compounds, or both, passing an intermediate stream comprising the light aromatic compounds to a second slurry reactor downstream of the first slurry reactor; and contacting the intermediate stream with hydrogen in the presence of a mesoporous zeolite supported metal catalyst in a second slurry reactor.

A system including a slurry reactor configured to receive an acetylene-rich gas stream and a hydrogen stream as one stream or as separate streams flowing upwards and a slurry catalyst comprising catalyst particles and a liquid solvent flowing downwards, wherein the liquid solvent extracts acetylene in the acetylene-rich gas stream and hydrogen in the hydrogen stream and at least a portion of the acetylene is converted to ethylene in the presence of the slurry catalyst and the hydrogen under hydrogenation reaction conditions to generate an acetylene-lean gas effluent and a spent slurry catalyst including spent catalyst particles and the liquid solvent.

The invention discloses a slurry reactor methanol synthesis device heated by electromagnetic induction and a slurry reactor methanol synthesis method, and belongs to the technical field of energy and chemical industry. The slurry bed methanol synthesis device comprises: a slurry bed reactor, wherein the bottom of the slurry bed reactor is provided with a reactor inlet, and the top of the slurry bed reactor is provided with a reactor outlet; the electromagnetic induction coil is arranged around the barrel shell of the slurry bed reactor; the cooling pipe is arranged in the inner cavity of the reaction section of the barrel of the slurry bed reactor; the gas distributor is arranged at the lower part of the inner cavity of the barrel of the slurry bed reactor; and the paraffin / heavy component outlet is formed in the middle of the barrel of the slurry bed reactor. According to the invention, an efficient and green methanol synthesis process can be realized, and the defects of high energy consumption, non-uniform temperature control and high carbon emission of a traditional heating method are overcome.

Provided is a process for optimizing throughput and flash during the hydroconversion of circular and renewable feed stocks into renewable fuel comprising the use of a slurry reactor. The present process uses high pressure operation of a vaporization stage in combination with the use of low-pressure stripping segments. The inclusion of low-pressure stripping segments allows the reactor to operate at high pressure, reducing CAPEX and OPEX, without the associated issues with flash and throughput commonly observed.

The present application provides a method for hydroliquefaction and / or lightening of carbon-containing raw material and a device for implementing the method, which can process coal, biomass, industrial and domestic waste and poor / heavy oil to obtain liquid hydrocarbon. The slurry reactor in the device is a suspended bed reactor, which is simple in system, easy to control, does not need an external circulation pump, optimally utilizes the slurry of liquefaction residue on line, is beneficial to obtain reasonable material distribution, realizes self-balance of solvent and improves oil yield. The method adopts cyclone feeding mode, thereby achieving the purpose of reducing coking.

According to the method for repairing the soil polluted by the polycyclic aromatic hydrocarbon through the ultrasonic mud bioreactor, ultrasonic pretreatment is added on the basis of the mud bioreactor, so that desorption and degradation of the polycyclic aromatic hydrocarbon are promoted, and the soil polluted by the polycyclic aromatic hydrocarbon is repaired. According to the method for repairing the polycyclic aromatic hydrocarbon contaminated soil through the ultrasonic slurry bioreactor, ultrasonic and the biological slurry reactor are combined, optimal ultrasonic setting parameters and selection of efficient degrading bacteria are given, the degrading effect is improved, and meanwhile cost and energy consumption are reduced.