31 results about "Heterogeneous condition" patented technology

The invention provides an ozone catalyst for sewage treatment and a preparation and sewage treatment method thereof. The catalyst can catalyze an ozone sewage treatment system under the heterogeneous condition, and therefore secondary pollution and other problems caused by a homogeneous ozone catalyst in the prior art can be avoided, and the ozone catalyst has the advantages of being stable in structure, capable of effectively improving ozone oxidization activity and the like. Meanwhile, in the method, inorganic materials with catalytic activity firmly wrap surfaces of kieselguhr granules, calcining and forming are conducted at a time to prepare the catalyst, and the method has the advantages of being simple in operation step, high in preparation efficiency, free of raw material waste and the like. Furthermore, in the sewage treatment method, the catalyst is adopted as a heterogeneous catalyst for ozone treatment of polluted water bodies, and therefore the zone oxidization capacity can be effectively improved, treatment efficiency is improved, and meanwhile secondary pollution can not be caused.

The decomposition method of cyclodexyl hydrogen peroxide is characterized by that under the heterogeneous condition intermittently or continuously adding solid alklouli catalyst whose PKa=10-47 in decomposition reactor, controlling the weight ratio of the solid alkali catalyst and cyclodexane oxide product in 1:20-1:300, reaction temp. is 10 deg.C-170 deg.C, reaction time is 5-200 min. and can decompose the cyclodexyl hydrogen peroxide into cyclodexanone and cyclodexanol.

The invention discloses a solid carbon base keggin type phosphomolybdic heteropoly acid catalyst and application thereof. The preparation steps are as follows: a carbon porous material and a carboxylfunctional group coupling agent are added into a dilute acid solution with the pH being 3-4, magnetic stirring is conducted at the room temperature for 12-24 h, Keggin type phosphomolybdic heteropolyacid, an inorganic metal salt and a surfactant are added, ultrasonic vibration is conducted for 0.5-1 h, a mixture is transferred into a hydrothermal reactor, a temperature programming dryer is used,the reaction temperature is raised from the room temperature to 150-180 DEG C in 0.5-1 h, the temperature is maintained for 48-72 h, and then decreased to the room temperature naturally, washing withultrapure water and ethanol for multiple times is conducted, filtration is conducted, and drying is conducted for 10-12 h. The solid carbon base keggin type phosphomolybdic heteropoly acid catalyst can efficiently catalyze hydrogen peroxide to oxidize iodine ions to form an iodine simple substance under heterogeneous conditions, reaction conditions are mild, the hydrogen peroxide utilization rateis high, environmental friendliness, no pollution and no peroxidation are achieved, thermal stability is good, and the catalyst can be reused for multiple times, and is easy to recycle.

The invention discloses a straight pile vertical impedance calculation method, which comprises the following steps: vertically dispersing a pile body of the straight pile and foundation soil accordingto the horizontal layering condition of a soil body, and dispersing the foundation soil in the radial direction according to the disturbance condition of soil around the pile; solving a wave equationof each soil ring layer and calculating the dynamic stiffness on the pile-soil contact surface through a radial transfer matrix method; and calculating the vertical impedance of the straight pile through a vertical transfer matrix method after solving the equation. The straight pile vertical impedance calculation method has the advantages that the vertical impedance of the straight pile under theradial heterogeneous condition of saturated soil around the pile caused by the construction disturbance effect in the layered foundation is calculated and considered; radial heterogeneity of layeredsaturated soil under a construction disturbance effect is considered through a bidirectional transfer matrix method, and meanwhile, a fractional derivative operator is adopted to describe a stress-strain relationship of foundation soil so as to improve calculation precision; and a Rayleigh rod vibration theory is adopted to describe vertical vibration of a pile body so as to consider a transverseinertia effect of pile body vibration. By means of the straight pile vertical impedance calculation method, the calculated vertical impedance of the straight pile better conforms to engineering practice.

The invention discloses a production method of disulfonated dihalogenated diphenylsulfone. The method disclosed by the invention comprises the following steps: carrying out a reaction on fuming sulfuric acid with accurately calibrated sulfur trioxide concentration with dihalogenated diphenylsulfone to obtain a completely disulfonated dihalogenated diphenylsulfone product; after the reaction, omitting a salting-out process, carrying out neutralization directly, and carrying out filtering and drying; and then improving the purity of the product through recrystallization. According to the technical scheme provided by the invention, the addition amount and concentration of a sulfonating agent sulfur trioxide are accurately controlled, the reaction is ensured to be carried out always under a homogeneous phase, meanwhile the defects that the reaction cannot be carried out completely under the heterogeneous condition caused by excessive sulfonating agent can be avoided, the salting-out process is omitted, the influence of introducing excessive inorganic salt on the post-treatment is avoided, and finally the high-purity polymerization-grade product is obtained through recrystallization.

The invention provides a simulated testing device and method for the gas production contribution rate of a heterogeneous coal-bearing reservoir. The device is composed of a pressurization system, a heterogeneous coal-bearing rock series simulation system, a back pressure system and a data acquisition and processing system. The heterogeneous coal-bearing rock series simulation system is provided with two gas input ends, the two gas input ends of the heterogeneous coal-bearing rock series simulation system are connected with the gas output end of the pressurization system and the gas output endof the back pressure system. To sum up, the gas production contribution rate of different layers can be tested under the condition of considering interlayer channeling, and a simple and feasible method is provided for gas production prediction of reservoirs with large reservoir thickness, reservoirs with complex lithological characters or multiple-layer reservoirs encountered on the scene. The device can be used for simulating accurate prediction of the gas production rate of coal and rock reservoirs under heterogeneous conditions, and thus a theoretical basis is provided for follow-up economic evaluation, engineering construction and accurate implementation of deployment plans.

The invention discloses a solid silicon-based Waugh-type molybdenum-containing heteropolyacid catalyst and application thereof. A preparation method for the solid silicon-based Waugh-type molybdenum-containing heteropolyacid catalyst comprises the following steps: adding a siliceous porous material and an amido functional group coupling agent into a dilute acid solution with a pH value of 3-4, carrying out magnetic stirring at room temperature for 12-24 h, then adding Waugh-type molybdenum-containing heteropoly acid and a surfactant, performing ultrasonic oscillation for 0.5-1 h, transferringthe formed substance into a hydrothermal reactor, raising a reaction temperature from room temperature to 150-180 DEG C within 0.5-1 h by using a temperature-programmed oven, keeping the temperature for 48-72 h, then carrying out natural cooling to room temperature, performing rinsing with ultrapure water and ethanol several times separately, and carrying out filtering and drying for 10-12 h. Thecatalyst of the invention can efficiently catalyze hydrogen peroxide to oxidize iodine ions under heterogeneous conditions so as to produce elemental iodine; and the catalyst has the advantages of mild reaction conditions, high utilization rate of hydrogen peroxide, friendliness to environment, no pollution, no peroxidation and good thermal stability, can be repeatedly reused a plurality of times,and is easy to recycle.

The invention relates to a method for preparing galactosyl dextran derivates. The method comprises the following steps: (a) adding galactose and glucosan to ionic liquid, heating and dissolving to obtain an initial solution; (b) adding thionyl chloride to the initial solution obtained in the step (a), and heating to obtain the galactosyl dextran derivates. The reaction system disclosed by the invention is in a homogeneous state, so that, compared with a heterogeneous condition, the reaction activity is greatly improved, and the preparation method disclosed by the invention is simple and feasible, and easy to control reaction.

The invention discloses a heterogeneous buried hill gas reservoir well control reserve prediction method and device.The method comprises the steps that a gas reservoir is divided into N seepage areas in the radial direction of a borehole according to the heterogeneous condition, the N seepage areas are distributed in a concentric annulus mode, and basic parameters of the N seepage areas are obtained; a pressure propagation equation of the gas reservoir from the concentric circle center in the radial direction is established, and the gas reservoir well control radius is obtained through the pressure propagation equation; and well control reserves are predicted by using the gas reservoir well control radius. The method can consider the characteristics of heterogeneous distribution of buried hill gas reservoirs, is more consistent with the actual situation, and achieves the accurate prediction of well control reserves.

The invention discloses a solid carbon-based Waugh-type molybdenum-containing heteropolyacid catalyst and application thereof. A preparation method for the solid carbon-based Waugh-type molybdenum-containing heteropolyacid catalyst comprises the following steps: adding a carbonaceous porous material and a carboxyl functional group coupling agent into a dilute acid solution with a pH value of 3-4,carrying out magnetic stirring at room temperature for 12-24 h, then adding Waugh-type molybdenum-containing heteropoly acid and a surfactant, performing ultrasonic oscillation for 0.5-1 h, transferring the formed substance into a hydrothermal reactor, raising a reaction temperature from room temperature to 150-180 DEG C within 0.5-1 h by using a temperature-programmed oven, keeping the temperature for 48-72 h, then carrying out natural cooling to room temperature, performing rinsing with ultrapure water and ethanol several times separately, and carrying out filtering and drying for 10-12 h. The catalyst of the invention can efficiently catalyze hydrogen peroxide to oxidize iodine ions under heterogeneous conditions so as to produce elemental iodine; and the catalyst has the advantages ofmild reaction conditions, high utilization rate of hydrogen peroxide, friendliness to environment, no pollution, no peroxidation and good thermal stability, can be repeatedly reused a plurality of times, and is easy to recycle.

The invention discloses a solid silica-based Anderson type molybdenum-containing heteropoly acid catalyst and application thereof. The catalyst comprises the following steps of adding a silica porousmaterial and an amino functional group coupling agent into a dilute acid solution with pH of 3-4, stirring with magnetic at the room temperature for 12-24 h, adding Anderson type molybdenum-containingheteropoly acid and a surfactant, vibrating with ultrasonic for 0.5-1h, transferring the solution into a hydrothermal reactor, using an oven with programmed heating, raising the reaction temperaturefrom the room temperature to 150-180 DEG C within 0.1-1 h, maintaining the temperature for 48-72 h, then cooling the reaction temperature naturally to the room temperature, washing several times withultrapure water and ethanol respectively, and filtering and drying for 10-12 h. The catalyst can effectively catalyze hydrogen peroxide to oxidize iodide ion under heterogeneous conditions to produceiodine elemental, a reaction condition is mild, the utilization rate of hydrogen peroxide is high, environmentally friendly and pollution-free are achieved, peroxidation does not exist, thermal stability is good, and the catalyst can be reused for many times and is easy to recycle.