912results about How to "No pollution" patented technology

The invention discloses a compound enzyme preparation for improving the absorption and utilization rate of a fertilizer and a preparation method thereof, and belongs to the technical field of enzyme preparations. The compound enzyme preparation is prepared from the following components in parts by weight: 100 parts of purified water, 6 to 8 parts of modified cellulase, 10 to 12 parts of immobilized protease, 10 to 12 parts of phosphatase, 10 to 14 parts of urease, 8 to 10 parts of nitrate reductase, 10 to 12 parts of pectinase, 8 to 10 parts of chitinase, 6 to 8 parts of xylanase, 10 to 12 parts of beta-glucosidase, 10 to 12 parts of superoxide dismutase and 4.5 to 6 parts of a microbial agent, the modified cellulase is obtained by chemically modifying cellulase; the immobilized protease is prepared by the following steps: adsorbing activated and coupled modified polylactic acid and a protease solution, crosslinking with glutaraldehyde, filtering, washing and drying. The compound enzyme preparation improves the fertilizer absorption and utilization rate of plants.

The invention belongs to the technical field of semiconductor photoelectric devices, and particularly discloses a preparation method for realizing growth of ultralow-defect perovskite single crystals based on steric hindrance control, which comprises the following steps: preparing a perovskite single crystal precursor solution: dissolving a perovskite single crystal precursor in a homogeneous solvent with coordination capability to prepare the precursor solution; and generating a perovskite single crystal seed crystal: heating the prepared perovskite single crystal precursor solution until microcrystals appear, selecting to form good crystals, drying, and storing as the seed crystal for future use. And growing the perovskite single crystal: putting the generated perovskite single crystal seed crystal into the perovskite single crystal precursor solution, heating, and growing to obtain the perovskite single crystal. The preparation method comprises the following steps: dissolving a precursor in a homogeneous solvent with coordination capability through a temperature reversal crystallization method, and adjusting the temperature to carry out single crystal growth; according to the steric hindrance theory, the growth temperature is selected by regulating and controlling the solvent proportion, and the perovskite single crystal with ultralow defect density is obtained.

The invention provides a novel strain M2108 of a salt-tolerant bacillus, the preservation number of the salt-tolerant bacillus is CGMCC (China General Microbiological Culture Collection Center) No.28283, and the novel strain M2108 of the salt-tolerant bacillus has relatively good salt tolerance and can grow and proliferate in a high-salt environment; the strain can be rapidly and stably colonized in a plant, and is rapid in propagation speed and strong in multiplication capacity in the plant. The new strain M2108 of the salt-tolerant bacillus provided by the invention has a treatment effect and a high control effect on various plant diseases: the control effect on diseases such as tomato root rot, damping-off and damping-off caused by fusarium oxysporum, pythium aphanidermatum and rhizoctonia solani is high, and the average control effect is 91.2% or above. When being used for preventing and treating plant diseases, the salt-tolerant bacillus M2108 is not easy to generate drug resistance, has good drug effect durability, is safe to human and livestock, and does not cause environmental pollution; the salt-tolerant bacillus M2108 microbial agent and the biocontrol agent provided by the invention are simple in preparation method, low in cost and simple and convenient to use. The salt-tolerant bacillus M2108 has a good application prospect in the prevention and control of plant diseases, and lays a foundation for the development of efficient and broad-spectrum biocontrol preparations.

The invention discloses a production method of distiller's grain fermentation liquid fertilizer specially applied to roxburgh rose. The distiller's grain fermentation liquid fertilizer is prepared bythe step of evenly mixing 50 to 80 parts of distiller's grain fermentation extracting solution, 0.5 to 1 part of microelement, 5 to 10 parts of seaweed meal, 5 to 10 parts of natural active organism,2 to 5 parts of potassium bicarbonate, 2 to 5 parts of natural active organism and 2 to 5 parts of natural surface active agent. A preparation method of the distiller's grain fermentation extracting solution comprises the steps: evenly stirring 50 to 80 parts of distiller's grain, 50 to 150 parts of rice washing water, 1 to 2 parts of EM microflora fermentation liquid and 0.5 to 1 part of sugar, performing composting fermentation at the room temperature to obtain a distiller's grain fermentation material, stirring and extracting through a sodium carbonate water solution, filtering and performing evaporation and condensation on obtained filtrate until the density is 1.1 to 1.2 to obtain distiller's grain fermentation extracting solution. The distiller's grain fermentation liquid fertilizerdisclosed by the invention has a good use effect, meanwhile can effectively prevent pest and disease damage to the roxburgh rose and is high-efficiency environment-friendly liquid fertilizer.

The invention discloses a split type micro-fluidic chip and a working method thereof. In the chip, a reagent storage module is connected with a reaction module through a connection module, and the reaction module is slidably arranged in a chute of the connection module; a plurality of solution containing cavities are formed in the reagent storage module, a sealing film is attached to the top of the reaction module, and a plurality of solution overflowing cavities are formed in the reaction module; during work, the reaction module and the reagent storage module abut against each other, and when the solution containing cavity is communicated with the atmosphere, directional flowing and releasing of a solution in the solution containing cavity in the micro-fluidic chip to the solution overflowing cavity are achieved through negative pressure pumping. Sample sampling, cleaning, nucleic acid adsorption, elution and reaction in the micro-fluidic chip can be achieved, and instant detection of pathogenic microorganisms is achieved.

The invention discloses a bio-based isosorbide carbonate plasticizer and a preparation method and application thereof, and relates to the technical field of plastic processing assistants.The preparation method of the bio-based isosorbide carbonate plasticizer comprises the steps that in the atmosphere of protective gas, diester carbonate and isosorbide serve as raw materials to be subjected to transesterification with a catalyst; and after the reaction is completed, carrying out post-treatment to obtain the isosorbide carbonate plasticizer. The isosorbide carbonate plasticizer disclosed by the invention can effectively reduce the melting temperature and melt viscosity of a material, improve the processability of the material, increase the flexibility of the material and improve the optical transmittance of the material. The preparation method disclosed by the invention has the characteristics of being simple in process, green and environment-friendly, easily available in raw materials, easy in catalyst separation and relatively high in product yield, and is an efficient and environment-friendly preparation process of isosorbide carbonate.

The invention belongs to the technical field of grassland improvement, and discloses an alpine pasturing area natural grassland community near-nature restoration and soil fertility improvement method and system, and the method comprises the steps: carrying out the transition and grazing in advance, and completing the prevention and control of rodent damage through an artificial bow and arrow capturing mode; different proportion combinations of different grass seeds are researched, and a suitable grass seed matching mode is screened out; soaking the seeds with a microbial agent; organic fertilizer is selected for fertilization; and carrying out no-tillage reseeding or manual reseeding. The grassland is cultivated through the technologies of grazing in advance, artificial deratization, combination of different grass seeds in different proportions, seed soaking with a fungicide and additional application of organic fertilizer, and a good effect is achieved. The method has the characteristics of safety, timeliness, sustainability, low input cost, simple and easy technology implementation and the like.

The invention belongs to the technical field of agricultural nanoparticle preparations, and relates to a dopamine nanoparticle for relieving plant salt stress and a preparation method thereof. And adding the double-ligand chelated dopamine solution into the lignin-based nano-particle suspension, and stirring to obtain the lignin-based nano-particle suspension. According to the invention, metal ions are adopted as a connecting bridge and are respectively chelated with dopamine and ethylenediamine tetraacetic acid salt, so that double-ligand chelated dopamine is obtained, and the self-polymerization behavior of dopamine is inhibited. The invention also provides a method for loading dopamine by using lignin-based nanoparticles. The self-polymerization of the dopamine is further inhibited; the adsorption of the soil on the dopamine is reduced, and the utilization rate of the dopamine is improved.

The invention relates to the technical field of eutectic, in particular to a binding head assembly, eutectic equipment and a chip mounting method.The binding head assembly comprises a driving assembly, a suction nozzle assembly and a visual assembly, and the suction nozzle assembly is arranged at the output end of the driving assembly and comprises a suction nozzle base, a suction nozzle, a first transparent part and a second transparent part; a through hole is formed in the suction nozzle seat, and the visual assembly is aligned with the through hole; the suction nozzle is arranged at one end of the through hole, and the first transparent part is arranged at the other end of the through hole and seals a port of the through hole; a penetrating adsorption channel is formed in the suction nozzle and communicated with the through hole, and an air path connecting hole is formed in the inner wall of the through hole; the suction nozzle is further provided with a perspective observation window, the observation window and the adsorption channel are arranged in a spaced mode, projection is conducted in the axial direction of the through hole, and the projection of the observation window is located in the projection of the through hole. The binding head assembly provided by the invention can be used for carrying out high-precision positioning on a plurality of chips in the eutectic mounting process.

The invention relates to the technical field of industrial waste heat recycling, in particular to an electric heating device and method for superheating saturated steam generated in the evaporative cooling process of a converter, an electric furnace and a steel rolling heating furnace in the iron and steel industry. Clean energy electricity serves as a heat source, saturated steam is heated into superheated steam through the steam superheater, the quality of the saturated steam can be effectively improved, damage of steam condensation water is prevented, and meanwhile steam conveying loss can be reduced; and compared with a traditional fuel gas type overheating device, other emissions are not added, and the problem of environmental pollution cannot be generated. The method is particularly suitable for the superheating process of high-temperature flue gas of a converter and an electric furnace in steel production and saturated steam generated by evaporative cooling steam drums such as a supporting beam in a heating furnace, the quality of (saturated) steam can be greatly improved by adopting the method, meanwhile, the harm caused by condensation of steam into water due to temperature reduction can be prevented, energy waste is effectively reduced, and the production cost is reduced. And the method has high economic benefits.

The invention discloses a microbial compound high-efficiency organic bacterial fertilizer which comprises the following raw materials: 10-20 parts of a microbial agent, 10-20 parts of humic acid, 3-10 parts of natural mineral powder, 1-7 parts of a plant extract, 2-4 parts of amino acid, 2-5 parts of a seaweed extract, 1-3 parts of chitosan, 3-7 parts of charcoal, 1-3 parts of chitin, 2-5 parts of potassium fulvate and 1-3 parts of lignosulfonate. The problems that existing organic bacterial manure is single in function, not remarkable in effect, high in preparation cost and the like are solved. The organic bacterial fertilizer has multiple functions of improving soil fertility, promoting crop growth, enhancing crop stress resistance and the like, and the preparation method is simple, easy to implement, low in cost and suitable for large-scale production.

The invention relates to the field of scavengers, in particular to a copper-based urea crystal scavenger for a vehicle and a preparation method of the copper-based urea crystal scavenger. The automotive copper-based urea crystal scavenger provided by the invention is prepared from the following raw materials: a copper-based catalyst, a surfactant, a foaming agent, a dispersing agent, a reducing pigment and deionized water, wherein the copper-based catalyst comprises copper acetate, the surfactant comprises AEO-10 and MOA-3PK, and the reducing pigment comprises methylene blue; the prepared automotive copper-based urea crystal scavenger is convenient to use, excellent in urea crystal melting effect and short in effective mileage, the environmental protection property of automobile running can be obviously improved after the automotive copper-based urea crystal scavenger is used, and meanwhile the effect of reducing the use cost of an automobile is remarkable.

The invention discloses a light-weight energy-absorbing polyurethane power battery pouring sealant and a preparation method and application thereof.The preparation method comprises the steps that liquid MDI and polytetrahydrofuran glycol serve as raw materials to prepare an isocyanate-terminated polyurethane prepolymer; the polyurethane power battery pouring sealant is prepared by reacting 1, 4-butanediol through adjusting a chain extension coefficient to generate microcellular foaming polyurethane, and a microcellular structure is formed through the reaction, so that the related performance requirements of light weight, energy absorption and the like of the power battery pouring sealant are met; the polyurethane pouring sealant prepared by the invention has the advantages of light weight, and excellent energy absorption and vibration reduction performance, mechanical property, thermal stability and bonding performance; and the preparation process is simple and controllable, environment-friendly and reliable, the cost is low, the stability and safety of the power battery can be improved, the development of new energy automobiles is promoted, and the environment-friendly requirement is met.

The invention belongs to the technical field of comprehensive recycling of secondary resources, and particularly relates to a method for recycling recyclable components of waste lithium batteries in a step-by-step and classified manner. The method comprises the following steps: carrying out charged crushing on the waste lithium battery in an inert atmosphere, treating the crushed material to obtain a solid I and an electrolyte, and treating the solid I in a solvent B to obtain a solid II and a negative electrode binder. Treating the solid II to obtain a solid III, negative electrode graphite powder and a lithium-containing compound; treating the solid III to obtain a solid IV and a positive electrode binder; treating the solid IV to obtain a solid V, anode graphite powder and a cobalt, manganese, nickel or lithium-containing compound; and further treating the solid V to obtain a diaphragm, a copper sheet, an aluminum sheet and a plastic shell. All-resource recovery of the lithium batteries is achieved through step-by-step classification, conditions of the method are mild, operation is easy to achieve, the process is simple, complex equipment is not needed, no toxic gas is generated in the whole process, the used solvent can be recycled, and the method is environmentally friendly and high in resource utilization rate.

The invention discloses a high-efficiency coal-saving agent for cement clinker firing and a preparation process and application thereof. The coal saving agent comprises the following components in parts by weight: 10-20 parts of a penetrating agent, 7-15 parts of a dispersing agent, 20-25 parts of a catalyst, 9-13 parts of a swelling agent, 30-48 parts of a heat supply agent and 60-70 parts of hydrogen peroxide. Wherein the heat supply agent is powder formed by solidifying aluminum powder, iron oxide powder, magnesium powder and glass powder, and the mass ratio of the aluminum powder to the iron oxide powder is 1: (4-7). The magnesium powder accounts for 12-20% of the total mass of the aluminum powder and the iron oxide powder. The glass powder accounts for 14-16% of the total mass of the aluminum powder and the iron oxide powder. The coal saving agent not only can effectively reduce the use amount of coal, but also has a sulfur fixation effect, so that the emission of sulfur oxide gas is reduced.

The invention relates to the field of identification of flavor grades of white spirit, and particularly discloses a method for identifying flavor grades of Maotai-flavor white spirit based on infrared spectroscopy, which comprises the following steps: S1, collecting base liquor samples of Maotai-flavor white spirit with different flavor grades, and carrying out sensory evaluation on the base liquor samples of the white spirit; s2, carrying out chemical value determination on 58 substances in the baijiu base liquor sample by using a gas chromatograph; s3, carrying out spectrum collection on the base liquor sample of the white spirit by using a Fourier transform infrared spectrometer; s4, establishing a base liquor aroma type grade qualitative judgment model based on the infrared spectrum; s5, using SIMCA software to establish a partial least square discriminant analysis classification model to discriminate the aroma type grade of the base liquor; and S6, carrying out Fourier transform infrared spectrum collection on the base liquor to be graded, and carrying out rapid flavor type grade judgment on the base liquor to be graded by utilizing the models established in the step S4 and the step S5. According to the method, the prediction model is established by combining infrared spectrum with an advanced mathematical analysis method, and online real-time detection of the sample can be realized.

The present invention relates to the technical field of flowmeters, and in particular to an open channel flowmeter, comprising a fixed pile assembly, a second straightening mechanism being connected to the center of the fixed pile assembly, columns being arranged on both sides of the second straightening mechanism, a pressing mechanism being connected through the columns, a first fixing mechanism being connected to the top of the columns, a flowmeter being arranged below the pressing mechanism, and a sharp bottom of the mounting column on the flowmeter. The present invention completes installation and disassembly of the open channel flowmeter by moving the pressing mechanism up and down, ensures that no tilting occurs during the installation process by the second straightening mechanism, and completes mobile installation of the open channel flowmeter by the fixed pile assembly.

The invention discloses a lead-free energy storage ceramic laminated material, and belongs to the technical field of dielectric energy storage. The lead-free energy storage ceramic laminated material is formed by sequentially laminating lead-free energy storage ceramic with a texture structure and lead-free energy storage ceramic with a non-texture structure, and preferably, the material comprises at least three layers; when the lead-free energy storage ceramic with the texture structure is positioned on the middle layer, the lead-free energy storage ceramic with the non-texture structure is positioned on the two sides of the middle layer; when the lead-free energy storage ceramic with the non-texture structure is located on the middle layer, the lead-free energy storage ceramic with the texture structure is located on the two sides of the middle layer. Based on the structural design of at least three layers, the non-textured ceramic is selected as the high-voltage-resistant layer, the textured ceramic is selected as the high-polarization layer, the lead-free ceramic laminated material with excellent energy storage performance is obtained, and the lead-free ceramic laminated material has wide application prospects in the fields of power electronics and pulse power.

The invention provides a method for accurately regulating and controlling the water quality of cold water in a rotor of a phase modifier, which comprises the following steps: accurately regulating and controlling the water quality of the cold water in the rotor through a bipolar membrane reactor, a rectifier and a control system; the anion receiving liquid circularly circulates between the anion receiving chamber and the anion receiving box, the rotor internal cooling water circularly circulates between the rotor internal cooling water chamber and the raw water tank, and the phase modifier rotor internal cooling water can be introduced into the raw water tank through a bypass and returns to the rotor internal cooling water system from the raw water tank; the water quality of rotor internal cooling water introduced into the raw water tank is monitored in real time through an online pH meter and an online conductivity meter of an internal cooling water circulation pipeline, and parameters of applying direct current to an operation membrane stack are regulated and controlled through a rectifier. According to the invention, the controllability is stronger, the stability is better, the water quality of the cold water in the rotor can be accurately regulated and controlled and recycled, an ion exchanger is not required to be arranged for ion exchange desalination, the energy consumption is low, and the pollution is avoided.

The invention relates to the technical field of production of fiber-reinforced thermoplastic composite prepreg and composite laminated plates thereof, in particular to a production method of high-strength polypropylene fiber-reinforced polypropylene resin unidirectional prepreg and a composite material. The method mainly comprises the following steps: straightly and tightly arranging and unfolding a certain number of polypropylene fibers, extruding a casting film from polypropylene resin through a screw, laminating and infiltrating the polypropylene resin and the polypropylene fibers, and pressing and coiling through a cold pressing roller to prepare the unidirectional belt. The one-way prepreg of the polypropylene self-reinforced composite material is paved according to a certain paving direction and thickness and then is subjected to hot pressing to prepare a polypropylene self-reinforced composite material laminated plate with a certain size and thickness. Or slitting the polypropylene self-reinforced composite material unidirectional prepreg, weaving the slit unidirectional prepreg with relatively narrow width, cutting and paving according to a certain size, or mixing and paving with a single-line prepreg tape, and performing hot pressing to form the polypropylene composite material laminated plate.

The invention discloses a nitrogen fertilizer synergist and application thereof, and belongs to the technical field of fertilizers. The nitrogen fertilizer synergist comprises the following raw materials in percentage by mass: 15-40% of a nitrification inhibitor, 5-10% of butyl dihydrojasmonate, 1-5% of a soil loosening agent, 30-50% of a dispersing aid, 5-10% of an anti-caking agent, 0.1-5% of a trace element fertilizer and 0-5% of nutritional ingredients. According to the nitrogen fertilizer synergist disclosed by the invention, by adding the dihydro jasmonic acid butyl ester, the dispersity of the nitrogen fertilizer synergist can be improved, the fertilizer efficiency of the fertilizer is improved, the growth of plants is promoted, the stress resistance of the plants is improved, the nitrogen fertilizer synergist also has double functions of delaying nitrogen conversion and promoting nitrogen absorption, the utilization efficiency of nitrogen is further improved, and the nitrogen fertilizer synergist is relatively good in flowability and can be applied to the field of agricultural production. The nitrification inhibitor is stable in high-temperature and low-temperature environments, is convenient to use, can be directly used for particle spraying or adding of fertilizer, and solves the problem that nitrification inhibitors such as DMPP can only be used after being dissolved by special solvents.

The present invention discloses a durable structure for transporting low surface energy droplets processed by laser and a preparation method thereof, comprising: a substrate thin plate, on which a primary wedge-shaped channel is processed, one end of the primary wedge-shaped channel is a divergent end, and the other end is a convergent end, and both sides of the primary wedge-shaped channel are processed with clamps; a secondary wedge-shaped groove array, which is nested inside the primary wedge-shaped channel, and there are multiple wedge-shaped protrusions of the same shape and size between the secondary wedge-shaped groove arrays, and the convergence direction of the wedge-shaped protrusions is opposite to the convergence direction of the primary wedge-shaped channel, and the wedge-shaped protrusions are evenly distributed in the first wedge-shaped channel in the horizontal and vertical directions. The durable structure of the present invention can realize the efficient long-distance transportation of low surface energy droplets in air, strong acid, strong alkali, and water environments, and can be assembled and expanded into a two-dimensional or three-dimensional low surface energy droplet long-distance transportation and separation device, and has excellent properties of acid and alkali resistance and wear resistance. This durable and practical structure for transporting low surface energy droplets is applied to biomedicine, oil-water separation, microfluidics and other fields.

The invention discloses a diaphorina citri adult repellent composition and application thereof. The repellent composition is prepared from the following components in parts by weight: 0.1 to 1.2 parts of nootkatone, 0.05 to 1.0 part of carvacrol, 4.0 to 6.5 parts of thymol and 3.0 to 5.0 parts of sophocarpidine. The repelling effect of the repellent composition on diaphorina citri adults is better than that of a single component, and the synergistic diaphorina citri adults repelling effect is achieved among the components. The components of the repellent composition are low in price, the cost for manufacturing the lure can be reduced, and the repellent composition is suitable for popularization and promotion.

The invention relates to the technical field of medical instruments, and discloses a waterproof sealing joint and a cable. The waterproof sealing joint comprises a joint body which is connected with the far end of the cable. The movable part is arranged at the far end of the connector body in a sleeving mode and can move in the axial direction of the connector body; the far end of the movable part extends inwards to form an extrusion part; a mounting space is formed between the extrusion part and the far end of the joint body; the sealing ring is arranged in the mounting space; the rotating piece is arranged on the connector body in a sleeving mode and can rotate in the circumferential direction of the connector body; the inner wall of the rotating part is provided with one of a spiral part and a protruding part, the outer wall of the moving part is provided with the other one, and the protruding part is embedded in the spiral part. The waterproof sealing joint is arranged at the far end of the cable. By means of the scheme, the technical problem that in the related technology, a waterproof cap is exposed in the operation environment and is prone to being polluted can be solved.

The invention provides a one-bath wool fiber bleaching treatment process, and relates to the technical field of textile printing and dyeing. The wool fiber bleaching treatment process based on the one-bath process comprises the following steps: S1, wool washing: putting all wool fibers into a bath barrel, injecting a large amount of clear water to enable the clear water to submerge the wool fibers, then adding a detergent containing a surfactant, and washing the wool fibers by an emulsification method; s2, carbonization treatment: placing the cleaned wool fibers in a second bath barrel, injecting a large amount of clear water to enable the clear water to submerge the wool fibers, and then adding a weak acid solution to clean the wool fibers in the bath barrel. The weak acid bleaching activator, the weak acid bleaching buffer agent and the weak oxidizing agent are used for replacing a traditional strong acid agent to bleach the wool fibers, so that the strength and the elongation of the bleached wool fibers are improved instead of obvious damage, and experiments show that the strength of the bleached wool fibers is improved by 3-8%, and the elongation is improved by 5-10%.

The present invention provides a testing device for a pulser, comprising: a simulated main valve; the simulated main valve comprises a connection part for connecting with the pulser to be tested, and a pressure feedback part installed on the connection part so as to be movable up and down; a simulated load is arranged on the pressure feedback part, and an acceleration sensor and a collection and communication component connected to the acceleration sensor are fixed on the simulated load, and the collection and communication component is used to receive the signal collected by the acceleration sensor and then output it to a terminal device; an air source supply component is connected to the simulated main valve, and is used to deliver high-pressure gas to the simulated main valve to simulate the pressure of the drilling fluid downhole. The simulation of the downhole environment is realized by the simulated load and the air source supply component, and the accuracy of the test results is improved; and the high-pressure gas will not cause pollution to the pulser, and the damage to the pulser to be tested caused by the test process is avoided; in addition, by setting the simulated main valve, the problem that the influence of the main valve on the test results is difficult to eliminate is also solved.

The present invention relates to a lake sediment phosphorus-fixing granule and a preparation method and application thereof. The preparation method of the granule includes: preparation of iron-modified attapulgite, preparation of calcium nitrate-polyvinyl alcohol solution, preparation of BC700 biochar and preparation of phosphorus-fixing granule. The present invention achieves a good phosphorus-fixing effect by using iron-modified attapulgite and calcium nitrate to jointly treat phosphorus in lake sediments, controls the release of nitrate over time, and solves the problems of ineffective release of calcium nitrate and subsequent pollution caused by direct addition of calcium nitrate. The granules prepared by the present invention not only have obvious effects in phosphorus fixation in lake sediments, but also can greatly reduce other pollution such as antibiotics in water. The phosphorus-fixing granules of the present invention can be used for the comprehensive management of lake sediment restoration, and the materials used are all natural products or degradable materials, will not cause water pollution, and are green and environmentally friendly.

The invention is suitable for the technical field of fine chemical engineering, and provides a method for catalytically synthesizing 1, 2-diol by using a titanium silicalite molecular sieve, which comprises the following steps: preparing methanol, a hydrogen peroxide solution and an alkaline additive into a homogeneous mixed solution, mixing the homogeneous mixed solution with a raw material olefin in a mixing tank, pumping into a fixed bed reactor, and carrying out a titanium silicalite molecular sieve catalytic epoxidation reaction to obtain 1, 2-diol. A 1, 2-alkylene oxide solution is generated; the method comprises the following steps: separating a 1, 2-alkylene oxide solution, recycling a substrate olefin and a solvent methanol, and carrying out hydration reaction on 1, 2-alkylene oxide and water in a fixed bed reactor under the action of an ion exchange resin catalyst to generate 1, 2-diol; and feeding the hydration product into a rectifying tower, and carrying out dehydration and impurity removal to obtain a high-purity odorless 1, 2-diol product. The method has the advantages of high product yield, no odor, inhibition of impurity generation, improvement of the product quality, simplification of the production process, no environmental pollution and realization of green production.

The invention relates to the technical field of oil field yield increase and transformation, in particular to environment-friendly biological blockage removal liquid and application thereof, and aims to solve the problem that a current biological blockage removal product can only remove organic blockage. The environment-friendly biological unblocking liquid provided by the invention is prepared from the following components in percentage by mass: 2-5% of biological enzyme, 1-5% of surfactant, 1-5% of pH (Potential of Hydrogen) regulator and the balance of water. 1%-3% of a biological enzyme stabilizer; 3-5% of a chelating agent; 0.5%-1% of a surfactant; 0.5%-1% of a dispersion suspending agent; and the balance of water. The biological blockage removal liquid provided by the invention can effectively remove organic blockage of a stratum caused by wax and asphaltene precipitates, so that crude oil is released from the surfaces of rock particles, the flowing of the crude oil in pores of the stratum is improved by changing the wetting state of rock, and inorganic blockage is removed through permeation dispersion and chelation solubilization effects, so that the mechanical property of the stratum is improved. Mixed scales formed by mutual deposition of inorganic scales and organic matters (wax and asphaltene) are effectively removed, and the requirement for plugging removal of a complex scaling reservoir of an oil well is met.

The invention discloses a preparation method of octafluorocyclopentene, which comprises the following two steps of: firstly, reacting 4-cyclopentene-1, 3-diketone with a selective fluorine reagent in acetonitrile under the condition of reflux to generate a crude product second mixture, purifying the second mixture, and putting the purified second mixture into a second-step reaction to obtain the octafluorocyclopentene. Reacting with diethylamino sulfur trifluoride in dichloromethane to generate a third mixture; the method has the advantages of environment-friendly and simple reaction process, no generation of three wastes, low cost, easy obtaining, simple reaction process, mild reaction, no generation of waste gas pollution even if nitrogen protection is needed, easy operation, and suitableness for industrial production.