49results about How to "High reaction space velocity" patented technology

The invention discloses a method for producing synthetic natural gas, which belongs to the technical field of coal chemistry and new energy. The method for producing the synthetic natural gas comprises: dividing raw material gases from a general gas source into low-carbon synthetic gases with a hydrogen to carbon ratio, namely a (H2-CO2) to (H2+CO2) ratio, being 4.5 to 15.0 and high-carbon synthetic gases with a hydrogen to carbon ratio being 0 to 2.0; according to a reaction temperature requirement, mixing the low-carbon synthetic gases with steam at certain flow, allowing the mixed gases to enter a primary thermal-insulation reactor to undergo a methanation reaction, subjecting the gases from the primary thermal-insulation reactor to heat exchange, mixing the gases with the high-carbon synthetic gases at a certain flow, and allowing the newly mixed gases into a secondary thermal-insulation reactor to undergo a methanation reaction; repeating the previous process for several times; and finally, obtaining the synthetic natural gas by processes of heat exchange, cooling, drying, compression and the like. The method has the characteristics that: (1) circulating equipment is not used; (2) all reactions are performed in thermal-insulation reactors, multiple stages of reactors are connected in series, and the reaction space velocity is high; and (3) the hydrogen to carbon ratio of the whole reaction system can be regulated easily, and the methane content in the product gas may reach over 95 percent.

The present invention relates to a catalyst for preparing propene by utilizing butene disproportionation. It is mainly aimed at solving the following problems of that previous technique has need of consuming ethylene with high additional value and in the process for preparing propene by means of butene disproportionation its space velocity is low, butene conversion rate is low, selectivity of propene is low and propene yield also is low. Said invention utilizes the technical scheme of adding copper or its oxide in the tungsten oxide/silicon dioxide catalytic system to better solve the said problems. Said invention can be used in industrial production for preparing propene by utilizing butene disproportionation.

The invention relates to the field of preparation of synthetic gas through dry reforming of methane, and discloses a method for preparing synthetic gas through dry reforming of methane. The loading amount of an active metal component Ni in a catalyst in a catalyst bed of a dry reforming reaction of methane is controlled, and a Al2O3 carrier and/or a Al2O3 carrier modified with an auxiliary agent is adopted. Even in relatively high reaction velocity, temperature dispersion of the catalyst bed is basically uniform, and an area where carbon is easily thermodynamically accumulated can be avoided, so that the catalytic stability of a catalyst is greatly improved and the service life of the catalyst can be prolonged.

The invention provides a high-dispersion monolithic catalyst for selectively catalytic oxidization of H2 in the atmosphere of high-concentration CO and a preparation method and application of the high-dispersion monolithic catalyst. The catalyst is suitable for a fixed bed reactor and has a multilayer structure, wherein the multilayer structure includes but not limited to a shell layer, an activecomponent layer, a carrier coating and a honeycomb carrier layer. The catalyst can be applied to the process of the selectively catalytic oxidization of H2 in the atmosphere of the high-concentrationCO, wherein the ratio of H2 to O2 in feed gas is 1:1 to 1:3, the reaction temperature is 150-250 DEG C, and the pressure is 0.3-0.6 MPa; besides, when the airspeed is 3000-20000h<-1>, the content of output H2 is less than 100 ppm, so that the reaction requirements of subsequent vapor catalytic coupling synthesis of oxalate by using CO are met.

The invention discloses a device for producing cyclohexane by adding hydrogen in benzene and a synthesis process. The device mainly comprises a gasification tower (1) and a reactor (2), wherein a liquid phase benzene inlet (5) is arranged at the upper part of the gasification tower (1), a liquid phase benzene outlet is arranged at the lower part of the gasification tower (1), the liquid phase benzene outlet is connected with a shell pass inlet of the reactor (2) through a pipeline (8), a shell pass outlet of the reactor (2) is connected to the gasification tower (1) through a pipeline (9), a gas phase outlet is arranged at the top of the gasification tower (1) and connected to a pipe pass of the reactor (2) through a pipe pass feed pipeline (12), a hydrogen material pipeline (6) is connected to the pipe pass feed pipeline (12), and a pipe pass discharge pipeline (11) is arranged at the bottom of the reactor (2). In the device, heat discharged from the intermediate reaction in the cyclohexane synthesis process is directly used for gasification of reaction material benzene so as to release the reaction heat without secondary heat exchange, therefore, the stable reaction conversion ratio is achieved, and the production capacity is improved.

The invention discloses a method for producing synthetic natural gas by using methanol purge gas, which belongs to the technical fields of coal chemical industry and new energy. This method of producing synthetic natural gas uses a multi-stage adiabatic methanation reactor, the inlet feed gas of the first adiabatic reactor is a mixture of methanol purge gas and coke oven gas, and the inlet feed gas of the second adiabatic reactor is The mixed gas of methanol purge gas and primary outlet gas undergoes three or more stages of reaction, and the CO and CO2 in the raw material gas are completely converted into methane through methanation reaction. The advantages of this method are: (1) No need for circulation equipment, saving investment and reducing operating costs; (2) All adiabatic reactors are used, with multi-stage series connection, high reaction space velocity and high grade of by-product steam.

A homogenizing catalyst for preparing ethanediol from epoxy ethane by hydration is the neutral salt or weakly acidic salt or their mixture, which can be dissolved in reaction medium. Its advantage is high selectivity.

The invention provides a method for producing low-carbon olefin by synthetic gas. The method comprises the following steps: carrying out Fischer-Tropsch synthesis-cracking reaction on the synthetic gas under the action of a multifunctional catalyst, wherein the reaction temperature is 250 DEG C to 400 DEG C, the reaction pressure is 0 to 5MPa, and the total volume space velocity of raw gas is 1000h<-1> to 10000h<-1>; then separating the low-carbon olefin out from a reaction product. The multifunctional catalyst is mainly prepared from the following components in parts by weight: 10 percent to60 percent of Fe2O3, 0.5 percent to 20 percent of MnO, 0.5 percent to 10 percent of K2O, 10 percent to 30 percent of Al2O3 and the balance of a molecular sieve. According to the method provided by theinvention, Fischer-Tropsch synthesis reaction and cracking reaction can be carried out at the same time; the problem in the prior art that the low-carbon olefin selectivity is low is solved; the technology has high sensitivity and the product distribution can be reasonably adjusted in a certain range according to the market quotations of ethylene, propylene and butylene; the method has the characteristics of simplicity in operation and remarkable synergistic effect.

A dechlorination hydrogen production device for treating PVC-containing plastic wastes comprises a first spiral moving bed, a second spiral moving bed, a fluidized bed, a dechlorination tower and a tar cracker; the first spiral moving bed is used for drying and dehydrating the PVC-containing plastic wastes to obtain a dried and dehydrated material; the second spiral moving bed is used for carryingout high temperature anaerobic pyrolysis on the dried and dehydrated material to generate a high-temperature pyrolysis gas and high-temperature pyrolysis wastes; the fluidized bed is used for carrying out high-temperature vaporization on the high-temperature pyrolysis wastes to generate a vaporized gas and ash; the dechlorination tower is used for dechlorinating the high-temperature pyrolysis gasto obtain a dechlorinated gas; and the tar cracker is used for carrying out tar cracking treatment on a mixed gas of the vaporized gas and the dechlorinated gas to obtain harmless combustible gases.The PVC-containing plastic wastes harmful to the environment are converted into the chlorine element-removed harmless combustible gases with high added values, so the utilization rate of urban waste resources is increased, and the pollution of the urban wastes to the environment is reduced.

The invention relates to a catalyst and a method for preparing butane-2 by C_4 olefin hydroisomerization, and the catalyst and the method are mainly used for solving the technical problems in the prior art of low reaction balance index, low olefin yield and high catalyst cost. In order to better solve the problems, the technical scheme adopted by the invention is as follows: the catalyst comprises the following components in parts by weight: (a) 10-20 parts of metal nickel or an oxide thereof; (b) 0.1-5 parts of metal molybdenum or an oxide thereof; (c) 75-90 parts of aluminum oxide-silicon dioxide composite carrier, wherein the pore volume of the catalyst is 0.5-0.9 ml/g, the specific surface area is 150-190 m<2>/g, the average aperture is 13-16 nm, and the pore volume with pore diameter larger than 10 nm occupies 20-60% of the total pore volume. The catalyst can be used in the industrial production of increasing the production of butane-2 by C_4 fraction.

The invention discloses a method for preparing tert-butyl (meth)acrylate. The method is characterized in that liquid acrylic acid and liquid isobutylene are mixed according to a molar ratio of 0.5:1.0 to 3.0:1.0, and then are reacted in a fixed bed tubular reactor, the reactor is filled with a niobium-zirconium composite oxide catalyst, and a molar ratio of niobium to zirconium in the niobium-zirconium composite oxide is 1:(0.01-2).

The invention discloses a two-stage fluidized bed CO dehydrogenation purification reaction technology and a used catalyst. The reaction technology is as follows: two fluidized beds are in up-and-down arrangement, a reaction gas is fed in from the bottommost of a reactor, and enters an upper fluidized bed reactor for reaction, after heat exchange condensation of the gas reacted in the upper fluidized bed reactor, a gas phase component is used as a carbonylation reaction raw material gas, and a liquid component enters a storage tank. A catalyst used in a lower fluidized bed is PdAgClx / TiO2 (x = 1-3), can be used for selective oxidation of H2 at low temperature to reduce or avoid consumption of CO raw material gas, the H2 in the raw material gas CO is reduced to 5000ppm or less after reaction in the lower fluidized bed, a catalyst used in an upper fluidized bed is PdO-Ag2O / TiO2, can be used for oxidatively transform the H2 as much as possible at high temperature, and the H2 in the CO raw material gas is reduced to 50ppm or less after reaction in the upper fluidized bed. The method can effectively solve the industrial enlargement problem of raw material gas CO oxidation dehydrogenation process in coal-based ethylene glycol synthesis technology.

The invention relates to a catalyst and a method for preparing butene-2 through butene-1 hydroisomerization. The technical problems in the prior art the n-butene hydroisomerization is low in conversion rate, the total olefin yield is low and the butene-2 is low in selectivity are mainly solved. With the adoption of the technical scheme, a mixed-phase alumina carrier consisting of theta-phase alumina and delta-phase alumina is adopted, the theta-phase alumina accounts for 60-90wt%, and the delta-phase alumina accounts for 10-40wt%. The problems are well solved, and the catalyst and method can be used for industrial production of cracking C4 fractions and increasing the yield of butene-2.

The invention discloses a process for preparing hydrogen by catalytic partial oxidation of liquid hydrocarbon using nickel based and/or noble metal as supported catalyst of the active component, controlling the reaction temperature between 750-900 deg. C, airspeed between 1.0X10#+[3] l/kg/hí½12.5X10#+[5] l/kg/h, using oxygen as oxidation agent for partial oxidation reaction for the liquid hydrocarbons, wherein inert diluted gas can be added, the mol ratio of the inert diluted gas and liquid hydrocarbons is between 0-15.