92results about How to "Avoid post-processing" patented technology

The invention discloses a synthesizing method of 2-methallyl alcohol, comprising the following steps of: sequentially adding water, solid base, 2-methallyl chloride and polyethylene glycol to a reaction vessel, then refluxing by heating, and dripping an aqueous alkali solution with the concentration of 1-50 percent; (2) after reaction is completed, cooling, standing and demixing a reaction solution to obtain an organic layer and a water layer, drying and dewatering the organic layer, decoloring by activated carbon, filtering to obtain a target product, and circularly using filter liquor obtained by filtering and desalting the water layer as a new reaction solvent for preparing the 2-methallyl alcohol; and (3) adding the 2-methallyl chloride to the circularly used reaction solvent, and complementally adding the polyethylene glycol, the water and the base to perform new reaction for preparing the 2-methallyl alcohol, wherein the filter liquor obtained by filtering the water layer in each reaction is always circularly used as a next new reaction solvent. The synthesizing method of the 2-methallyl alcohol has the advantages of low production cost, high target product yield, low energyconsumption and little pollution.

The invention discloses a method for preparing nanoscale sheet cerium oxide by a hydrothermal method. The method comprises the following steps of: 1) preparing a 0.01-0.05mol/L Ce<3+> ion aqueous liquor at room temperature; preparing an ammonia water liquor at room temperature, wherein pH value of the ammonia water liquor is greater than 11; 2) placing the ammonia water liquor in a reaction kettle in a temperature range from -10 DEG C to 20 DEG C, taking the Ce<3+> ion aqueous liquor, and slowly dropping to excessive ammonia water liquor while stirring; and 3) stirring the mixed liquor obtained in the step (2) at constant temperature for reacting for 2-24 hours, centrifugalizing after reaction, removing the supernatant liquid, washing the powder obtained by centrifugalization and drying to obtain the solid sheet cerium oxide. According to the method disclosed by the invention, the nanoscale sheet cerium oxide is synthesized by one step by the hydrothermal method. The method is simple in preparation process, and low in demand on production and process conditions. No template materials are required and no organic solvents are added. The method is basically free from pollution and very environmental-friendly.

The invention discloses a preparation method of a cellulose acetate nano filter membrane. The preparation method comprises the following steps: 1) the cellulose acetate is put into a solvent, stirred, added with a nonsolvent additive and stirred, then a mixture is obtained, the mixture stands still, and then casting membrane liquid is obtained; 2) the casting membrane liquid is made into a wet membrane with the thickness being 250mum by striking, then the wet membrane stands still in the air; (3) the wet membrane treated by the steps is immersed in distilled water for gel bath treatment, therefore, an asymmetrical membrane is obtained; and 4) ethanol water exchange treatment and pure cyclohexane exchange treatment are sequentially carried out on the asymmetrical membrane, then the cellulose acetate nano filter membrane is obtained. The nano filter membrane obtained by the preparation method has big flux and obvious separating effect.

The present invention relates to the dearsenication method of Cu-Zn-Co mineral in non-ferrous metal smelting developed for dearsenication at high efficiency. The present invention features that Cu-Zn-Co mineral in 36-58 wt%, chalocotie as sulfurizing agent in 36-58 wt% and carbon material as reductant in 4-8 wt% are crushed, mixed and pelletized before reducing roasted at 700-900 deg.c. The present invention has the advantages of reasonable technological process, less pollution and high dearsenication rate.

The invention provides a method for preparing nanometer cerium oxide. The invention adopts the following technical scheme that the method comprises the following steps: 1) preparing a Ce(NO3)3.6H2O aqueous solution with a concentration of 0.05-0.1 mol/L at room temperature; 2) taking a certain volume of the Ce(NO3)3.6H2O aqueous solution at room temperature, dropwisely adding undiluted commercially-available 25% ammonia water into the Ce(NO3)3.6H2O aqueous solution according to a volume ratio of 10:1-3; 3) allowing the mixed solution to react for 2-24 hours, after the reaction, performing centrifugation, removing the liquid at the upper level, washing the powder obtained after centrifugation, and drying to obtain solid powder. The invention realizes one-step synthesis of nanometer cerium oxide by a hydrothermal method; the preparation process is simple, and the requirements for production equipment and process conditions are low; no organic solvent is added, which is basically free of pollution, and is quite environment-friendly; no macromolecular surfactant is added, which prevents posttreatment process such as washing and the like; the kinds of the required raw materials are few, and when compared with traditional process, the method of the invention is quite low in production cost; the method cam prepare uniform and pure cerium oxide nanoparticles, cerium oxide nanorods, and mixtures of the above two.

The invention discloses a device for forming micro metal parts by particle jet electrodeposition and a method thereof. Based on the processing technique of the particle jet electrodeposition, a processing method of millimeter-scale metal parts is developed by utilizing the principle of layered machining in prototype manufacturing and combining the latest numerical control machining technology. Through a plurality of two-dimensional templates which define the filling process of jet electrodeposition in the region, the metal deposits can be stacked into the required metal parts.

The invention provides a phenol yellow-resistant functional masterbatch, a preparation method thereof, a use thereof and a phenol yellow-resistant nylon. The phenolic yellow functional masterbatch comprises the following components by weight: 30 to 70 parts of polyamide, 5 to 15 parts of silicone raw rubber, and 5 to 15 parts of organic acid. The phenolic yellow functional masterbatch is preparedby mixing the components of the formulation amount and then extruding it by an extruder. The phenolic yellow functional masterbatch provided by the invention can be used for phenol yellow modificationof polyamide, can be directly added to the polyamide, and can be simply mechanically mixed, thereby avoiding cumbersome modification by using phenol yellow-resistant agent. The post-treatment process; when the addition amount is 2wt%, the anti-phenol yellowing index of the nylon can reach 4, and the effect is long-lasting.

The invention discloses a polyol acrylate type photosensitive bonding agent for gypsous material 3DP (three-dimensional printing) process and a preparation method thereof. The polyol acrylate type photosensitive bonding agent is characterized in that polyol acrylate type compounds are used as monomers; benzoic acid and derivatives of the benzoic acid are used as photoinitiators; ethanol or isobutanol is used as a flowing seeping promoter; an ultraviolet light source is used as a triggering light source; the gypsous material 3DP efficient bonding agent is prepared. In the prior art, inorganic materials such as gypsum use an ordinary 3DP technology, and the defects of low product initial strength, low printing speed, high post treatment difficulty and the like exist. Through the application of the method, the printing speed of the 3D printing gypsum product can be effectively accelerated; the initial strength of the 3D printing gypsum product can be effectively improved; the complicated post treatment process of the printed product is avoided, so that the manufacturing efficiency and the finished product quality of 3D printing products are greatly improved; the process complexity degree is reduced.

The invention belongs to the field of automobile interior product machining and manufacturing, in particular to a pressing die. The pressing die comprises an upper die and a lower die, and the profiles of the upper die and the lower die are provided with continuous and mutually matched cutting edges along the cutting lines of the product. When the pressing die is used, because the pressing and the edge cutting of the product are completed once, later machining is avoided and machining procedures are reduced, the production efficiency of the enterprise is increased. Meanwhile, because the continuous cutting edges directly cut off excessive materials while pressing and molding the product, the side lines of the molded product are trim and beautiful, the product does not require polishing procedure after edge cutting, and a threat to the health of workers and the pollution to the environment due to fiber dust produced by polishing are also avoided.

The invention relates to a rapid forming method of a thermoplastic fiber-reinforced composite material plate. The rapid forming method is characterized by comprising the following steps that (1) forming equipment and materials are prepared, specifically, the special equipment with presoaking, laying, superimposing, temperature control and pressure control, vacuum lamination forming, cutting, heating and mould pressing forming structures is arranged, a resin solution with a thermoplastic-forming function and the fiber-reinforced materials are prepared; (2) the fiber-reinforced materials are soaked into the resin solution with the thermoplastic-forming function, and fiber glue pieces are prepared; (3) the fiber glue pieces obtained in the step (2) are superimposed by 1-5 layers, the superimposed fiber glue pieces are placed in a vacuum press with a programmable temperature control and pressure control function, and a thermoplastic fiber-reinforced laminated composite material is prepared; (4) a mould plate is cut; (5) the mould plate is heated and softened; (6) mould pressing forming is conducted; and (7) the finished product is prepared. The rapid forming method of the thermoplastic fiber-reinforced composite material plate has the characteristics and beneficial effects of high mechanization degree, short processing period, high efficiency, low product cost and the like.

The invention relates to a vertical polarization wire grid production device and belongs to the microwave radiation and microwave remote sensing field. The vertical polarization wire grid production device is composed of a base, a rotary feeding mechanism, a guide mechanism, a motor driving system, a position-limiting protection mechanism and a tension stabilization mechanism; the base enables a supporting and fixing effect; a rotating wire frame completes rotational motion under the driving of a servo motor; the tension stabilization mechanism completes a paying-off action when maintaining the tension of lines stable; the ball screw nut pair of the guide mechanism drives the tension stabilization mechanism to move along the guide axis of a linear bearing under the driving of the servo motor, so as to jointly form feeding movement in an X direction. The vertical polarization wire grid production device has advantages of simple structure, low manufacturing cost and high production efficiency. With the vertical polarization wire grid production device adopted, a new path can be provided for the localization of millimeter-wave band polarization line grids, and deficiencies of China in polarization wire grid protection instruments can be compensated.

The present invention relates to a windshield wiper device, in particular for a rear windshield wiper of a motor vehicle, comprising a wiper motor with one or more driven shafts (3), one or more wiper arms (2), each capable of being attached to an end section (3a) of the driven shaft (3) by way of a fastening mechanism (1), wherein the fastening mechanism (1) comprises a connection piece (4) with a hole (5) provided therein complementary to end section (3a) of the driven shaft (3), said driven shaft (3) able to be inserted into said hole for fastening the connection piece (4) to the wiper motor, wherein a friction-locked connection is made between the connection piece (4) and the driven shaft (3) and/or between the connection piece (4) and the end section (3a) of the driven shaft (3) in the installed state.

The embodiment of the invention discloses a display panel and a display device. The display panel includes a substrate including a display area and a non-display area; a multi-stage gate drive circuitwhich is located in the non-display area of the substrate; a broken line detection line which is located in the non-display area of the substrate and surrounds the multi-stage gate drive circuit at one side of the display area. Compared with the prior art, and according to the embodiment of the invention, the detection of ESD disconnection is realized, the display panel with poor ESD disconnection can be timely intercepted, and the yield of the display panel is improved.

The invention provides an assembled semi-trailer frame, a semi-trailer and an assembling method thereof. The assembled semi-trailer frame comprises two longitudinal beams, a front cross beam, a rear cross beam and a floor, wherein the two longitudinal beams are longitudinally arranged in parallel; the front cross beam and the rear cross beam are respectively clamped at the front and rear ends of the floor; the floor and the two longitudinal beams are fixedly connected in an assembled way; and the front cross beam and the rear cross beam are respectively fixedly connected with the two longitudinal beams in an assembled way. As the front cross beam and the rear cross beam are respectively clamped at the front and rear ends of the floor, the floor and the two longitudinal beams are fixedly connected in an assembled way, and the front cross beam and the rear cross beam are respectively fixedly connected with the two longitudinal beams in an assembled way, the welding workload is greatly reduced and quality defect caused by welding is avoided. Through adoption of assembled connection and fixation between the parts, the quality defect caused by welding is completely avoided and a problem of high labor cost is also solved; therefore, the semi-trailer frame quality is improved, the post-treatment work of quality defect is reduced and the labor cost is also reduced.

The invention relates to a stator (11) used for an electromotor. The stator is coaxially wound around a central shaft line (18) in an extending manner. The stator (11) is provided with an electric winding (12) arranged on winding teeth, the electric winding is provided with a wire material continuing part (10) and an electric connector (4) that are applied to the electric contact part (34). The stator (11) is provided with an injection molding encapsulating part (13) which at least partially surrounds the winding (12), the stator (11) is coaxially arranged in a tube (5), the injection molding encapsulating part (13) is arranged in the tube (5), and the invention also relates to a method for manufacturing the electromotor having the stator.

The invention discloses a method for synthesizing 3beta-hydroxy-16alpha,17alpha-epoxy-5-pregnene-20-ketone, which comprises the following steps of: adding 348.8 weight parts of methanol into 7.0 weight parts of diene, and heating to the temperature of 40 DEG C with stirring; reducing the temperature to be between 26 and 27 DEG C, and adding 68.7 weight parts of 30 percent H2O2, 34.3 weight parts of 10 percent NaOH, 22.9 weight parts of 30 percent H2O2 and 11.4 weight parts of 10 percent NaOH slowly; controlling the temperature to be between 28 and 30 DEG C in the process of adding liquid, raising the temperature to be between 34 and 35 DEG C, keeping the temperature, reacting for 3 to 4 hours, and distilling under reduced pressure to obtain a white solid; and washing the white solid, performing suction filtration, leaching, and drying at the temperature of 105 DEG C to obtain a high-purity oxygen-bridged object. In the method, a synthetic process is short in time, oxygen-bridged reaction is complete, a melting point of the product is stabilized between 189.5 and 191.2 DEG C, the content of the product is 99.3 percent, and the yield of the product is between 98.5 and 99.1 percent. The method is suitable for industrial production.

The invention discloses a phenolic hydroxy epoxidation preparation technology. A compound containing phenolic hydroxyl and epoxy chloropropane are taken as raw materials; under the effect of a catalyst, chlorohydrin ether is prepared by etherification ring-opening reaction; and a phenolic hydroxy epoxidation product is prepared by ring-closure reaction, wherein the catalyst is mesoporous molecularsieves with immobilized benzyl triethyl ammonium chloride. The phenolic hydroxy epoxidation preparation technology includes modifying the mesoporous molecular sieves; mixing the modified mesoporous molecular sieves with a benzyl triethyl ammonium chloride water solution; and preparing the phenolic hydroxy epoxidation product by an ultrasonic microwave heating immobilization method. By adopting the phenolic hydroxy epoxidation preparation technology, the epoxidation product with a low hydrolysable chlorine content can be directly prepared, complicated post-treatment technologies are omitted, the technology is stable, material consumption and energy consumption are low, byproducts are fewer, and the catalyst can be recycled, so that the preparation technology can be used for large-scale industrial production.

The invention provides a device for testing the shape memory performance of a thermal response material based on a bending deformation method. The device comprises an experiment box, a temperature control module, a bending deformation module, a measurement module and a control and display module. A push-pull type quick clamp and a square block are arranged in the experiment box and are used for clamping and fixing a test sample; the temperature control module comprises an air heating pipe and a fan type cooler and is used for heating or cooling air in the experiment box; the bending deformation module comprises a ball screw, a crank sliding block mechanism, a spring type bent arm fixed to a crank and a stepping motor. The measurement module comprises a temperature sensor, a proximity switch and an angular displacement sensor; the control and display module comprises a computer, a controller, a data acquisition device and a calculation module. The device for testing the shape memory performance is convenient to operate, automatic testing and displaying of the shape memory performance of the thermal response material are achieved, the testing efficiency and precision are improved, and the method belongs to the field of testing of the shape memory performance of the thermal response material.

The invention provides a production process of a copper-aluminum transition wiring terminal with limiting constraint conditions. The process comprises the following steps: step 1, rolling the copper-aluminum composite casting blank into round bars of various specifications; step 2, completing the bright annealing of the round bars through the protection gas added with argon; step 3, fixing a rulerand sawing according to the blanking size, and removing burrs on the surface; step 4, firmly welding the aluminum core of the copper-aluminum composite round bar and the aluminum rod of the transition wiring terminal through friction welding; step 5, making the welded copper-aluminum transition wiring terminal be in a specified thickness within a limit constraint mold; step 6, punching a center hole, cutting edges, and shaping; and step 7, performing oscillation cleaning, drying, packaging, and discharging in the oscillator with grinding balls. The acid-base cleaning process is abandoned andis changed into flowing water flow oscillation cleaning, and the material is forced to flow along the longitudinal direction by adding the limiting constraints, the phenomenon that the bulging is cracked during the flattening process is avoided, the rejection rate is reduced, and the production efficiency is greatly improved.

The invention relates to a block chain technology, and discloses a block chain-based warehouse commodity distribution method, which comprises the steps of performing re-encryption on multi-level warehouse commodity data to obtain encrypted warehouse data and a re-encryption key stored in a key block, calculating a Merkel root of the key block when the number of keys in the key block reaches a preset threshold value, and sending the calculated Merkel root to a server; generating a Merkel root, performing authenticity verification processing and member verification based on a verifiable certificate corresponding to the re-encryption key, when the member verification is passed, storing the Merkel root in a storage block chain, storing the encrypted storage data in a distributed database, and when a distribution request is received, storing the Merkel root in the storage block chain and storing the encrypted storage data in the distributed database. And decrypting the encrypted storage data by using the re-encryption key to obtain decrypted storage data, and pushing the decrypted storage data to a sending end of the distribution request. The invention further provides a block chain-based warehouse commodity distribution device, electronic equipment and a computer readable storage medium. According to the invention, the problem of low safety of warehouse commodity distribution can be solved.

The invention relates to the technical field of chemical synthesis, and particularly discloses a synthesis method of a beta-chloro-alpha, gamma-dicarbonyl compound. The synthesis method comprises thefollowing steps: under a solvent-free condition, taking an alpha, gamma dicarbonyl compound shown as a formula (I) as a raw material, taking anhydrous aluminum chloride as a catalyst, and introducingchlorine to carry out chlorination reaction, so as to obtain the beta-chlorinated alpha, gamma dicarbonyl compound shown as a formula (II). The beta-chloro-alpha, gamma-dicarbonyl compound shown in the formula (II) is prepared through a chlorination reaction by taking chlorine as a chlorination reagent and taking anhydrous aluminum chloride as a catalyst under a solvent-free condition, a product with the purity of more than 90% can be obtained only through simple post-treatment of a reaction product, the yield can reach 90% or above. The method has the advantages of mild reaction conditions, simple process operation, no generation of sulfur dioxide polluting the environment, greenness, environmental protection, and suitableness for large-scale industrial production.