84results about How to "Safe and controllable process" patented technology

The invention discloses a preparation method for a nitrogen-containing activated carbon catalyst. The method comprises the following steps of: 1) pre-treating a carbonized material; 2) introducing a nitrogen-containing reagent, wherein the nitrogen-containing reagent is selected from carbamide, melamine or phenylamine, and the adding molar ratio of the carbonized material to the nitrogen-containing reagent is 1:(0.1 to 10); 3) activating in one step; and 4) refining. Compared with the traditional nitrogen-containing activated carbon catalyst, the catalyst prepared by the method has the advantages of high activity, long service life, high yield of reaction product, i.e., glyphosate when the catalyst is applied to the oxidization of N-phosphonomethyl aminodiacetic acid, and the like. The preparation method has the advantages of low pollution, safe and controllable process, short high-temperature activation period, low energy consumption, simple process, low cost and the like.

The invention discloses a method for preparing supercapacitor-dedicated active carbon by using mixed molten salts as an activator. According to the method, asphalt or coal tar which is used as a raw material is uniformly mixed with mixed molten salts; under protection of argon or nitrogen, the mixture is placed in a carbonization furnace to be carbonized; and finally, the carbonized product is crushed, washed and dried to obtain active carbon. The active carbon has high specific surface area and effective mesopore-micropore pore size distribution, and has high electrochemical specific capacity and good high-current charge discharge capability and cycling stability.

The invention relates to a synthesizing method of an epoxy fatty acid ester. According to the method, formic acid (acetic acid) contacts and is mixed with hydrogen peroxide in a first micro-reactor, such that a peroxidation reaction is initiated; when a material of the initiated peroxidation reaction flows out of the micro-reactor, the reaction of the material is continued for several minutes in an extension pipe (capillary or micro-channel) connected to the outlet of the first micro-reactor, such that peroxyformic acid (peroxyacetic acid) is produced; the in-situ produced peroxyformic acid (peroxyacetic acid) contacts and is mixed with non-reacted hydrogen peroxide and fatty acid ester in a second micro-reactor, such that an epoxidation reaction is initiated; the reaction of the material of the initiated epoxidation reaction is continued for several minutes in an extension pipe connected to the outlet of the second micro-reactor, or other kettle-type material storage devices, such that epoxy fatty acid ester is produced. According to the method, organic acid peroxidation and double-bond epoxidation reactions are integrated in series, such that epoxy fatty acid ester is obtained by continuous synthesis. The process is safe and controllable. Under the optimized condition, double bond conversion rate in fatty acid ester is higher than 90%, and epoxy fatty acid ester selectivity is higher than 80%.

The invention discloses a method for preparing size-controlled graphene oxide by a clean oxidation technology. The method comprises the following steps: performing pre-oxidization on natural flake graphite serving as a raw material to increase a gap between graphite layers and add an oxidization functional group on the edge, enabling ammonium hydroxide and hydrogen peroxide to act jointly under a hydrothermal condition to protect a flake graphite layer from being sheared too small, and performing deep oxidization by a hydroxyl radical produced by hydrogen peroxide excitation to prepare a graphite oxide product; cleaning the prepared graphite oxide, and performing ultrasonic treatment in a solvent to prepare a graphene oxide dispersing solution; drying the graphene oxide dispersing solution to obtain graphene oxide powder. In the preparation process, no strong acid and no heavy metal oxidant are needed; the post-treatment process is simple and environment-friendly; the raw materials are low in cost; furthermore, the preparation process is simple, and the method is a method expected to be used for preparing the graphene oxide in a large scale.

The invention discloses an operation device for suturing the annulus fibrosus after discectomy. The operation device comprises a suturing hook with a line and a line hooking device matched with the suturing hook with the line, wherein the suturing hook with the line is composed of a first handle and a suturing hook body; the bottom of the suturing hook body is upwards bent from one side to form a bent hook; the head of the bent hook is in a needle point shape and provided with a line seam allowing a suture line to penetrate through; the first handle is provided with an indicating mark corresponding to the bent hook and distinguishing the two sides of the bent hook; the line hooking device is composed of a second handle and a line hooking body; the bottom of the line hooking body is upwards bent from one side to be arc. Suturing of the annulus fibrosus is achieved in a limited space, the success rate of operation is high, the cost is low, the edge distance of the sutured soft tissue and the suturing depth can be controlled in the operation process, and the process is safe and controllable.

The invention discloses an environment-friendly synthesis method of two-dimensional transition metal carbide or nitride nanosheets. The environment-friendly synthesis method comprises the following steps: mixing a corrosion intercalation agent and a ternary layered ceramic material, performing a corrosion intercalation reaction, and then performing shearing dispersion treatment to obtain the two-dimensional transition metal carbide nanosheets or the two-dimensional transition metal nitride nanosheets. The synthesis method of the two-dimensional transition metal carbide or nitride nanosheets, provided by the invention, is environment-friendly, simple in process, easy to operate, safe and controllable in process and low in time consumption and energy consumption; and by the synthesis method, the synthesizing way of the two-dimensional transition metal carbide or nitride nanosheets is enriched and popularization and application of the two-dimensional transition metal carbide or nitride nanosheets can be effectively promoted.

The invention provides a method of preparing aromatic aldehyde and ketone through continuously oxidizing aromatic alcohol by adopting a tubular reactor, and belongs to the technical field of organic synthesis processes. According to the method, an aromatic alcohol compound is taken as a raw material; 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) is taken as a catalyst; pypocholoride is taken as an oxidizing agent; nitrogenous organic matter is taken as a solvent. The method is a process technology that the aromatic alcohol is continuously oxidized in the tubular reactor to prepare the aromatic aldehyde and ketone. The method has the characteristics of mild conditions, short reaction time, high raw material utilization ratio, being capable of realizing effective control in the reaction process, being safe and reliable, and continuous operation and high production efficiency.

The invention discloses a method for continuously synthesizing dimethyl sulfone, and belongs to the technical field of organic synthesis. According to the method provided by the invention, dimethyl sulfone is prepared in a continuous flow microchannel reactor by using dimethyl sulfoxide as a raw material and using the aqueous solution of hydrogen peroxide as an oxidant. The method has the advantages of mild condition, short reaction time and high utilization of raw materials, can realize effective control in the reaction process, is safe and stable, realizes continuous operation and has high production efficiency.

The present invention belongs to the field of sterilization apparatuses and sterilization methods, and particularly relates to a hydrogen peroxide sterilization apparatus and a hydrogen peroxide sterilization method. With the hydrogen peroxide sterilization apparatus and the hydrogen peroxide sterilization method, vaporized hydrogen peroxide can be produced so as to effectively sterilize the space and the object requiring sterilization, and the hydrogen peroxide residue can be rapidly cleared after the sterilization is completed. The hydrogen peroxide sterilization apparatus of the present invention comprises a liquid storage container, a peristaltic pump, a vaporizer, a heating device, a temperature sensor, a sterilization gas inlet valve, a sterilization space, and a related control system.

The invention discloses an oxidizing type catalyst. The oxidizing type catalyst is used for purifying tail gas of heavy disease vehicles, and has high NO (nitric oxide) oxidizing ability in the cold start phase at low temperature, namely that NO is oxidized and converted into NO2 (nitrogen dioxide), so as to provide NO2 for the catalyzing reaction of downstream catalyzing units, such as DPF (diesel particulate filter) and SCR (selective catalytic reducer); finally, the NOx (oxynitride) is converted into N2 (nitrogen), so as to purify the NOx. A catalyst coating layer is coated by sections, andis mainly used for improving the ability of converting NO into NO2 at low temperature section, and accelerating the temperature for converting NO into NO2 to move towards the low temperature direction; a carrier material consists of cerium oxide and composite oxide thereof, and the coating is coated by sections, and is of a single-layer structure; the active components contain noble metals (Pt (platinum) and Pd (palladium)), and the total content is controlled within 5 to 15 g / ft3. The oxidizing type catalyst has the advantages that the preparation technology is simple, the cost is low, the property is stable, the good ability of converting NO into NO2 at low temperature is realized, and the oxidizing type catalyst is suitable for industrialized production.

The invention describes a ski (2) or a snowboard in the form of a board-type gliding device (1). By reference to the width (13) of the gliding board body, at least one slot (14) is provided in its middle portion extending in the depth direction—arrow (15)—from the top face (7) of the gliding board body in the direction towards the running surface facing (10) and in its longitudinal direction essentially parallel with the longitudinal direction of the gliding board body. This at least one slot (14) is provided with a view to causing a cross-sectional weakening and reducing the stiffness of the gliding board body transversely to its longitudinal direction. Also provided is at least one geometry-influencing means (19), by means of which the cross-sectional shape or contour of the gliding board body is variable as a function of load and / or can be manually varied. The geometry-influencing means (19) comprises a plate-type force-transmitting element (44), which extends across more than 50% of the length of the gliding board body and is supported within its longitudinal extension, at least in part-portions, on the top face (7) of the gliding board body so as to transmit load, and the plate-type force-transmitting element (44) is disposed so that it overlaps the least one slot (14) in the longitudinal direction and bridges it transversely to the longitudinal direction of the slot (14).

The invention discloses a method for preparing benzaldehyde by continuously oxidizing methylbenzene through a tubular reactor, and belongs to the technical field of organic synthesis processes. The method is a process technology that a methylbenzene compound is adopted as a raw material, a metal ion complex of one or more of cobalt, molybdenum and bromine is adopted as a catalyst, hydrogen peroxide is adopted as an oxidizing agent, acetic acid is adopted as a solvent, and methylbenzene is continuously oxidized in the tubular reactor to prepare benzaldehyde. The method is mild in condition, short in reaction time, high in raw material utilization rate, capable of achieving effective control in the reaction process, safe, stable and high in production efficiency and achieves continuous operation.

The invention describes a ski (2) or a snowboard in the form of a board-type gliding device (1). By reference to the width (13) of the gliding board body, at least one slot (14) is provided in its middle portion extending in the depth direction—arrow (15)—from the top face (7) of the gliding board body in the direction towards the running surface facing (10) and in its longitudinal direction essentially parallel with the longitudinal direction of the gliding board body. This at least one slot (14) is provided with a view to causing a cross-sectional weakening and reducing the stiffness of the gliding board body transversely to its longitudinal direction. Also provided is at least one geometry-influencing means (19), by means of which the cross-sectional shape or contour of the gliding board body is variable as a function of load and / or can be manually varied. The geometry-influencing means (19) comprises a plate-type force-transmitting element (44), which extends across more than 50% of the length of the gliding board body and is supported within its longitudinal extension, at least in part-portions, on the top face (7) of the gliding board body so as to transmit load, and the plate-type force-transmitting element (44) is disposed so that it overlaps the least one slot (14) in the longitudinal direction and bridges it transversely to the longitudinal direction of the slot (14).

The invention discloses a method for recovering platinum and rhenium from a platinum-rhenium catalyst. The method comprises the following steps of 1, carrying out electrodissolution reaction on the platinum-rhenium catalyst so as to obtain slurry; 2, centrifuging the slurry so as to obtain supernatant and precipitates; 3, adjusting the pH value of the supernatant to be 1-4 and then carrying out adsorption with resin; 4, after mixing ammonia water and an ammonium chloride solution, carrying out desorption on the resin subjected to absorption and carrying out evaporation and concentration on anobtained desorption solution so as to obtain ammonium rhenate; and 5, leaching the precipitates by using aqua regia, carrying out centrifuging to obtain supernatant, obtaining platinum-contained precipitates from the supernatant by adopting an ammonium chloride precipitation method and then carrying out hydrazine hydrate reduction so as to obtain platinum powder. The method has the advantages thatthe rhenium in the platinum-rhenium catalyst is selectively dissolved through electrochemical action, so that the rhenium and the platinum are separated and then are recovered separately through an ion exchange method and an aqua regia dissolution-ammonium chloride precipitation method, and therefore the separation efficiency of the rhenium and the platinum can be improved, and the quality and the recovery rate of obtained products are relatively high.

The invention discloses a fibrous ring suturing operation device after discectomy for lumbar disc herniation. The fibrous ring suturing operation device after discectomy for lumbar disc herniation comprises a suture needle and a suture line, wherein the suture needle comprises an operation handle and a suture hook; the suture hook is fixedly arranged on the operation handle; the operation handle and the suture hook are in a split structure; the suture hook is provided with a suture line connection part; the suture like is connected with the suture hook into a whole through the suture line connection part; a hook tip breaking structure is arranged at one side, far away from the hook tip, of the suture line connection part. When the device is adopted for fibrous ring suturing, only the hook tip of the suture hook needs to be broken off and extracted by a needle holder after threading is ended, so that the fussy and difficult process of looking for the line head is avoided; the suturing time is greatly shortened. Only the hook tip with relatively low price in the device is disposable consumable, so that the treatment cost of a patient is effectively reduced; the edge distances of sutured soft tissues and the suturing depth can be controlled by the fibrous ring suturing operation device; the gap between soft tissues is overcome. The fibrous ring suturing operation device is reasonable in structure, small in operation error and high in surgical successful rate.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a process for preparing phenylenediamine through a micro-reaction technology. The method comprises the following steps: metering to-be-reduced nitro aromatic hydrocarbon, a solvent, a catalyst and hydrogen, continuously feeding into a hydrogenation micro-reactor, and carrying out a hydrogenationreduction reaction, wherein the to-be-reduced nitro aromatic hydrocarbon can also be prepared by adopting a continuous micro-nitrification process. According to the invention, a hydrogenation reduction reaction is carried out by adopting a hydrogenation micro-reactor, so that the process is safe and controllable; and particularly nitro aromatic hydrocarbon is prepared by combining a micro-nitrification reactor, and the material directly enters the hydrogenation micro-reactor without separation, so that the method is a continuous production process containing the micro-reactor, can prevent accumulation of dinitrobenzene in the process, and is an intrinsically safe phenylenediamine preparation process.

The invention discloses a method for quickly separating oyster peptide from oyster enzymolysis liquid. The method comprises the following steps: adding an emulsifier and lipase into enzyme-deactivated oyster enzymolysis liquid, uniformly mixing, and performing hydrolysis at the temperature of 35 to 50 DEG C for 4 to 8 h to obtain a secondary enzymolysis product of oyster; adding yeast cell wall polysaccharides and active carbon into the secondary enzymolysis product, oscillating during heat preservation at the temperature of 50 to 60 DEG C for 0.5 to 1.5 h, performing vacuum suction filtration through a filter membrane of 0.5 [mu]m, and collecting filtrate to obtain the oyster peptide. According to the method, the lipase is used for hydrolyzing fat in an enzymatic hydrolysis system to break the emulsification balance in the enzymatic hydrolysis system and drive a water phase to be separated from an oil phase. The hydrolysis conditions of the method are mild, and the process is safe and controllable; large-scale industrial production can be realized.

The invention relates to a method for recovering a carbon-fiber enhanced epoxy resin composite material. In the existing method, the requirement for equipment is high and the recovery cost is large. The method comprises the following steps of: cutting materials needing to be decomposed into blocks with the volume being 5cm<3>, putting the blocks in a backflow device containing acid liquor, heating for 5-20 minutes at the temperature of boiling point, cleaning and carrying out vacuum drying; then putting the obtained mixture into a reaction kettle, adding an organic solvent and an oxidizing agent, firstly heating, then cooling to normal temperature, and obtaining a primary product; and after cleaning, putting a solid product in the primary product into industrial acetone solution for dipping, obtaining recovered carbon fiber and carrying out pressure-reduced distillation on a liquid product to obtain phenol and derivatives thereof. In the method, reaction under low temperature and low pressure is realized and has the advantages of moderate reaction condition, easy control of reaction, fewer side products, no pollution basically and no corrosion to equipment and the like, so that the method is a green recovering method.

The invention belongs to the technical field of photocatalysts and discloses a hollow spherical carbon nitride photocatalyst, and a preparation method and application thereof. The photocatalyst is prepared by the following steps: mixing ethanol, ammonia water and ultrapure water, adding tetraethoxysilane, and carrying out stirring at a constant speed to obtain a solution A; dropwise adding a mixedsolution B of tetraethoxysilane and n-octadecyl trimethoxysilane into the solution A, carrying out standing at room temperature, and calcining a solid obtained by centrifugation at 500-550 DEG C to obtain a silicon dioxide sphere template; mixing the silica sphere template and cyanamide at a temperature of 60-80 DEG C, and calcining the obtained mixture at a temperature of 500-550 DEG C in the nitrogen atmosphere to obtain powder C; and adding an ammonium bifluoride solution into powder C to remove the template, carrying out washing with water, and carrying out drying. The synthesis process is simple, and the obtained hollow porous photocatalyst presents morphology of spheres with uniform sizes, has good physical and chemical stability and huge specific surface area, has good catalytic performance, and has basic conditions for practical application.

The invention discloses a preparation method for a nitrogen-containing activated carbon catalyst. The method comprises the following steps of: 1) pre-treating a carbonized material; 2) introducing a nitrogen-containing reagent, wherein the nitrogen-containing reagent is selected from carbamide, melamine or phenylamine, and the adding molar ratio of the carbonized material to the nitrogen-containing reagent is 1:(0.1 to 10); 3) activating in one step; and 4) refining. Compared with the traditional nitrogen-containing activated carbon catalyst, the catalyst prepared by the method has the advantages of high activity, long service life, high yield of reaction product, i.e., glyphosate when the catalyst is applied to the oxidization of N-phosphonomethyl aminodiacetic acid, and the like. The preparation method has the advantages of low pollution, safe and controllable process, short high-temperature activation period, low energy consumption, simple process, low cost and the like.

The invention discloses a method for removing impurity mercury from crude selenium, and belongs to the technical field of purification and impurity removal of scattered metal. The method comprises the steps: adding a vulcanizing agent into crude selenium slag which is crushed to 200 meshes or below, uniformly mixing and briquetting to obtain a mixed material, putting the mixed material into a closed furnace, and heating and vulcanizing in an inert atmosphere; carrying out vacuum distillation on the vulcanized selenium, enabling the selenium to enter a gas phase and be collected in a volatile matter form, and enriching generated mercury sulfide and valuable elements and enabling the generated mercury sulfide and the valuable elements to enter residues; and carrying out secondary distillation on the obtained selenium for further mercury removal. The method is simple in process, safe and controllable in process and convenient to operate, the mercury content in the final selenium product is smaller than 5 ppm, the direct recovery rate of selenium is larger than 96%, and the removal rate of mercury is larger than 99.8%.

The invention discloses a storage battery pack online discharge system and a control method. The system comprises an inverter which is used for inverting the electric energy of a storage battery packinto an alternating current and connecting the alternating current into a power grid; a discharging control switch which is used for connecting the storage battery pack into the inverter for discharging; a storage battery pack control switch which is used for controlling the storage battery pack to be powered off or on from a direct current system; and a controller which is used for controlling the working states of the inverter, the discharge control switch and the storage battery pack control switch. According to the present invention, an inverter power supply technology is applied to achieve the electric energy conversion, and the direct-current power supply energy stored in the storage battery pack is fed back to the power grid, so that the energy can be fully utilized, waste is avoided, meanwhile, heat is reduced, and it is guaranteed that the process is safe and controllable. Meanwhile, the automatic control of the capacity checking process of the storage battery pack is realizedthrough the controller. The storage battery pack online discharge system and the control method of the invention are widely applied to the technical field of power supplies.

An electrical enclosure includes a mechanism for moving and / or extinguishing an arc fault occurring in a first compartment of the electrical enclosure. The mechanism is positioned adjacent to a busbar in a second compartment of the electrical enclosure. In the case of a first arc fault occurring in the first compartment, an explosion occurs which results in a pressure wave. The pressure wave causes the mechanism to move into the second compartment and make electrical contact with the busbar, which causes a short and / or a second arc fault in the second compartment, thereby extinguishing the first arc fault in the first compartment.

The invention discloses a synthesis method of chloromethyl thiazole, and 1-isothiocyano-2-chlorine-2-propylene and chlorine are taken as the raw materials to react to obtain chloromethyl thiazole. Theprocess is simple, the reaction route is short, the cost is low, the yield is high, the molar yield is up to 99% (compared with dichloropropene), the process design is reasonable, the process is safeand controllable, no wastewater process is used, and the cost for treating wastewater is reduced.

The invention relates to a method of preparing 2,4-dichlorobenzaldehyde through continuous oxidation of 2,4-dichlorotoluene, and belongs to the technical field of organic synthetic process. The method includes the steps that a 2,4-dichlorotoluene compound is used as a raw material, one or more metal ion complexes of cobalt, molybdenum and bromine are used as catalysts, hydrogen peroxide is used as an oxidizing agent, acetic acid is used as solvent, and 2,4-dichlorotoluene is continuously oxidized in a tubular reactor to prepare 2,4-dichlorobenzaldehyde. The method is mild in condition, short in reaction time, high in raw material use ratio, safe, stable and high in production efficiency and can achieve effect control in the reaction process and continuous operation.

The invention discloses a special cold-resistant and anti-freezing polyethylene cable material for outdoor cables and a preparation method therefor. The cable material is characterized by being prepared from the following raw materials in parts by weight: 90-100 parts of polyethylene, 10-15 parts of red phosphorus, 3-5 parts of paraffin, 0.5-1 part of silane coupling agent kh570, 15-25 parts of nano calcium carbonate, 0.8-1.6 parts of polyvinyl alcohol, 2-4 parts of copper powder, 5-8 parts of polystyrene resin, 1-3 parts of zinc borate, 5-10 parts of pentaerythritol stearic amide, 2-3 parts of castor oil, 2-4 parts of triglycol diisocaprylate, 3-5 parts of urea and a proper volume of anhydrous ethanol. According to the special cold-resistant and anti-freezing polyethylene cable material for the outdoor cables and the preparation method therefor, the production process is simple, the process is safe and controllable, and the product performance is high, so that the cable material is suitable for large-scale production.

The invention belongs to the field of organic synthesis, and particularly discloses a system and method for synthesizing methyl ethyl oxalate based on a micro-channel reactor. The system comprises a first raw material bottle, a second raw material bottle, the micro-channel reactor and a collecting device. The micro-channel reactor comprises a first inlet micro-channel, a second inlet micro-channel, a micro-channel and a channel outlet. The first inlet micro-channel and the second inlet micro-channel are connected with the first raw material bottle and the second raw material bottle respectively. The other end of the first inlet micro-channel and the other end of the second inlet micro-channel are connected with the micro-channel. The channel outlet is connected with the collecting device. Through the efficient mixing and process strengthening of the micro-reactor, through an ester exchange method, the high methyl ethyl oxalate yield can be realized, and the selectivity is high; compared with a traditional kettle type reactor micro-reactor, continuous feeding can be realized, the production efficiency of the product is greatly improved, the process is safe and controllable, and human error accidents are reduced.

The invention discloses a metal pretreatment technological process. The metal pretreatment technological process comprises the following steps of 1, primary washing; 2, degreasing; 3, middle-stage water washing; 4, surface adjustment; 5, phosphorization; and 6, later-stage water washing. According to the metal pretreatment technological process, workpieces are treated, the treatment process is safe and controllable, the process can be conveniently and automatically operated, the workpiece processing process can be adjusted at any time, and the surface treatment process of the different workpieces can be met; and meanwhile, the mutual influence between the processes of the metal pretreatment technological process can be reduced to the minimum, and the technological process can be monitoredat any time and can be adjusted.