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Method for preparing 5-methoxytryptamine by one-pot method
PendingCN121872971AThe reaction steps are simpleImprove reaction efficiencyOrganic chemistrySodium acetateAcetic acid
The invention discloses a method for preparing 5-methoxytryptamine by a one-pot method, which comprises the following steps: by taking 1, 2, 3, 4-tetrahydro-6-methoxy-1-oxo-beta-carboline as a raw material, neutralizing by using strong acid instead of traditional acetic acid during ring-opening reaction, and carrying out decarboxylation reaction on a ring-opening product without separating to prepare the 5-methoxytryptamine. The method can completely avoid the generation of sodium acetate in the ring-opening reaction in the traditional technology, reduces the influence on the next decarboxylation reaction, and can directly perform the decarboxylation reaction without separating the ring-opening product, thereby effectively solving the problem that the decarboxylation reaction needs to be directly performed in the prior art. According to the method for preparing the 5-methoxytryptamine by using the 2, 3, 4-tetrahydro-6-methoxy-1-oxo-beta-carboline as the raw material, the defects that weak acid is left and an intermediate needs to be separated in the method are overcome, and the reaction route is shortened. The method improves the product yield and purity, has the advantages of simplicity and convenience in operation, high product purity, less three wastes and low cost, and is suitable for large-scale industrial production.
Owner:TECHNO (FUJIAN) FOOD INGREDIENTS CO LTD
A mold slide processing method
The application provides a mold slider processing method and relates to the field of automobile molds. After the slider processing reference and the mold base plate processing reference are made the same center, the method processes the insert mounting nest and the second sliding surface on the front surface of the slider, effectively solves the error of the profile or contour of the insert mounted on the slider and the profile or contour on the mold base plate, the error needs to transfer the mold base plate to a press, and the error needs to be debugged manually according to the data obtained by debugging. The slider processing method can greatly improve the mold production cycle, reduce the mold manufacturing cost, and reduce the labor intensity.
Owner:HUBEI SHIYAN XIANFENG DIE CO LTD
A mold structure for molding a slider
Owner:NANFANG PUMP IND CO LTD
Method for the integral casting of a multilayer casting
ActiveCN119910129Bavoid multiple purchasesImprove efficiencyFoundry mouldsFoundry coresProcess engineeringMaterial resources
This invention relates to the field of casting technology, and more specifically, to a method for integral casting of multi-layer castings. This invention provides a method for integral casting of multi-layer castings, solving the problems of high difficulty in integral casting of multi-layer castings, long welding cycles during assembly, low economic efficiency, and difficulty in mass production in existing technologies. The integral casting technology for multi-layer castings in this invention includes the design of the casting process and the molding scheme, realizing the integral forming of multi-layer castings through casting. Complete machine manufacturers can directly obtain finished products by purchasing castings, avoiding the need for multiple purchases of raw materials and subsequent welding processes. This effectively improves economic efficiency and production cycle, significantly shortens the production cycle, saves manpower and material resources, and reduces manufacturing costs.
Owner:KOCEL STEEL
SMT quality control method and system
PendingCN122094094AEliminate measurement ambiguityRealize dynamic compensationElectrical componentsElectric machineControl engineering
The invention relates to the technical field of SMT, and discloses an SMT quality control method and system, and the method comprises the steps: calculating a PCB rotation deviation angle and a PCB translation deviation, and superposing the PCB rotation deviation angle and the PCB translation deviation for a target mounting point coordinate, and obtaining a component position deviation value; when the position deviation value of the component exceeds an allowable deviation threshold value, calculating an additional displacement value generated by the rotation action, and deducting the additional displacement value from the position deviation value of the component to obtain a comprehensive compensation displacement value; and a rotation instruction is sent to a rotating head servo motor according to the component position deviation amount, a stepping pulse signal is sent to a gantry stepping motor according to the comprehensive compensation displacement amount, and a rotating head and a gantry execute compensation actions in parallel to complete component alignment. The problem that in the prior art, fixed coordinate mapping cannot adapt to PCB position changes is solved, the double-gantry cooperation efficiency is improved, and the overall production period is shortened.
Owner:SHENZHEN BAIQIANCHENG ELECTRONICS CO LTD
A method and application for the recycling of salt mud
This invention relates to a method and application for the recovery of salt mud, belonging to the field of chemical process technology. The invention utilizes a chemical reaction between sodium sulfate in mineral brine and calcium chloride in the wastewater discharged from a soda ash plant. The salt mud produced from the refined mineral brine is then mixed with the above reaction solution. After sedimentation and filtration, a mixture of sodium chloride, gypsum, and salt mud is generated. The obtained sodium chloride can be used to produce soda ash, while the gypsum and salt mud mixture can be used as a building material. The gypsum and salt mud mixture obtained by the method of this invention has stable properties and can be directly sold as a semi-finished product. The method of this invention employs multiple processing steps, reducing equipment and pipeline blockage during the recovery process and minimizing corrosion of equipment by raw materials and intermediate products. This significantly reduces operating costs, facilitates extended production cycles, and meets the current high demand in the soda ash market, resulting in high economic benefits.
Owner:GUANGDONG NANFANG SODA ASH IND
Vacuum drying machine for producing positive electrode material
ActiveCN224080589Uevenly heatedavoid underheatingDrying solid materials without heatDrying chambers/containersGear driveElectric machine
The utility model discloses a vacuum drier for anode material production, which relates to the technical field of vacuum systems, and comprises a support frame, the top of the support frame is fixedly connected with a connecting shell, the connecting shell is provided with a drying mechanism, the support frame is provided with a mounting mechanism, the drying mechanism comprises a motor frame, and the motor frame is fixedly connected with the connecting shell. By arranging the roller, the motor enables the rotating shaft to rotate, then the rotating shaft drives the first gear to rotate, then the first gear drives the second gear to rotate, at the moment, the second gear drives the first rotating block to rotate in the second limiting block, and then the first rotating block drives the connecting block to rotate; through the connecting block capable of driving the roller to rotate, the effects that the materials can roll in the roller, so that the materials are uniformly heated, the materials can be effectively prevented from being heated insufficiently or overheated in some places, uniform evaporation of moisture is ensured, and the material performance change or damage caused by local overheating is avoided are achieved.
Owner:SHANDONG CHUANGPUS NEW ENERGY TECHNOLOGY CO LTD
Semi-closed water storage full-light type solar greenhouse
The utility model discloses a semi -closed water heat storage full daylight type sunlight greenhouse relates to agricultural engineering technical field. The utility model discloses a greenhouse, the inside of greenhouse is provided with support heat storage subassembly, and one side of support heat storage subassembly is provided with support guide subassembly, and the inside of support guide subassembly is provided with thermal insulation quilt, and both ends of support guide subassembly are provided with winding assembly and elastic traction subassembly respectively. The utility model discloses a winding assembly to the thermal insulation quilt is carried out winding operation, and the traction end of elastic traction subassembly is under the spring end elastic force, and the thermal insulation quilt is continuously applied tension, and its length is released dynamically according to demand simultaneously, and this synergic mechanism guarantees that the thermal insulation quilt can be closely, evenly and wound on the winding end, and the neatness and the aesthetic quality of winding body are improved significantly, and more importantly, by maintaining the tightness in the winding process, the problem of the heat insulation performance of the thermal insulation quilt caused by the increase of the interlayer gap is avoided effectively.
Owner:内蒙古元蒙科技有限公司
Circulating fixed bed
ActiveCN113926392AAchieve recyclabilityEfficient secondary useGrapheneCarbon nanotubesTemperature controlFixed bed
The invention discloses a circulating fixed bed. The circulating fixed bed is used for circularly producing a carbon material and comprises a temperature control body, at least one temperature control section reactor and a controller, the reactor is at least partially located in the temperature control body, and the temperature control body controls the temperature of each temperature control section reactor; the reactor comprises a rotating body and pipes AB, the pipes AB comprise a pipe A and a pipe B, and the pipe A and the pipe B are arranged in a sleeving mode and move relatively; and the controller controls materials to enter the A pipe and the B pipe to react to generate a carbon material, the controller controls the rotating body to rotate to drive the A pipe to rotate relative to the B pipe so as to feed and discharge the material, and the A pipe forms different angles relative to the B pipe in cycles so as to achieve cyclic production of the carbon material. The problems of energy conservation, environmental protection, high yield and homogenization in the prior art can be solved.
Owner:QINGDAO UNIV OF SCI & TECH
C10 recovery device capable of generating steam
PendingCN121780195AHigh recovery rateSuppressor enrichmentDistillation corrosion inhibitionHydrocarbon distillation control/regulation
The invention provides a C10 recovery device capable of generating steam, and belongs to the technical field of petroleum refining, the C10 recovery device comprises a first feed preheater, a second feed preheater, a C10 cutting tower, a tower top steam generator and a tower top hot water heat exchanger, enabling the raw oil to enter a C10 cutting tower at a preset temperature for separation treatment to form a gaseous light component; the tower top steam generator is connected between the tower top of the C10 cutting tower and the tower top hot water heat exchanger and is used for carrying out secondary condensation treatment on the gaseous light components, low-pressure steam and liquid light components subjected to primary condensation are generated after the light components are subjected to condensation treatment through the tower top steam generator, and the low-pressure steam and the liquid light components are subjected to secondary condensation treatment through the tower top hot water heat exchanger. And condensing the liquid light component through a tower top hot water heat exchanger to generate hot water for heat tracing and a product of C10 and below, wherein the product of C10 and below is output as a reforming raw material in a hot discharge form. According to the invention, the recovery of C10 and below products can be realized.
Owner:ZHEJIANG PETROLEUM&CHEM CO LTD +1
Regenerated paper pulp fiber separation device
ActiveCN224148439Uimprove qualityeffective forcePaper recyclingPaper material treatmentProcess engineeringPulp fibre
The utility model discloses a regenerated paper pulp fiber separating device which comprises a separating box, a screen drum mechanism with an internal hollow structure is fixedly connected inside the separating box, the screen drum mechanism is used for separating paper pulp fibers, and screen hole assemblies are arranged inside the screen drum mechanism in an annular array mode. By means of the design, the fibers are subjected to more effective acting force in the separation process, the separation speed is increased, the separation efficiency is improved, the production period is shortened, the yield is increased, meanwhile, the screen hole assembly can accurately screen the fibers of different sizes, and the production efficiency is improved. And the separation quality is ensured, and the quality of recycled paper is improved.
Owner:ANHUI SHENGQUN NEW MATERIALS TECHNOLOGY DEVELOPMENT CO LTD
A method for preventing fracturing proppant backflow by generating a porous artificial well wall around a well
The application discloses a method for preventing fracturing proppant backflow by generating porous artificial well wall around well, and belongs to the technical field of oil and gas well fracturing reconstruction. According to formation pressure, formation temperature and formation permeability, the improved double-effect slurry is prepared, so that the viscosity, solidification time and pore structure after solidification of the improved double-effect slurry meet the injection requirements of the production well; the improved double-effect slurry is displaced into the fracturing fracture by injecting the isolation fluid and gradually displacing the fracturing proppant; the improved double-effect slurry forms high-strength porous consolidated body in the fracture around the well after well shut-in, the synergistic optimization of the proppant backflow inhibition and the flow conductivity is realized, the serious flow conductivity attenuation caused by the proppant backflow near the production well is avoided, the production effect is influenced, the output of formation sand and gravel and coal powder can be reduced, the proppant backflow can be effectively prevented, the fracturing effect can be remarkably improved, and the adverse effects caused by the sand production and the proppant backflow can be eliminated.
Owner:SHAANXI YANCHANG PETROLEUM GRP
Oil well fracturing method for bottom water reservoir
The invention discloses an oil well fracturing method for a bottom water reservoir, which comprises the following steps of: perforating at an oil-water interface position, and putting a squeezing drilling tool into an oil well until the oil-water interface is perforated; injecting foam or clear water into the squeezing drilling tool, then injecting gel and displacing fluid, and pulling out the squeezing drilling tool after the gel becomes gel; perforation is carried out on an oil layer section, and a fracturing drilling tool is tripped to the oil layer section perforation to carry out fracturing on the oil layer section; after fracturing is finished, blowout is controlled, and liquid is discharged; the fracturing drilling tool is pulled out after liquid discharging is finished, and a sand washing drilling tool is replaced for sand washing; and after sand washing is completed, a well completion tool and equipment are installed for well completion. The stress of a lower water layer can be increased, stress shielding is established before fracturing, and cracks are inhibited from communicating with bottom water.
Owner:PETROCHINA CO LTD
A sintering control process for improving lead and cadmium leaching rate of ceramic glaze
This invention discloses a sintering control process for improving the lead and cadmium leaching rate of ceramic glazes, relating to the field of daily-use ceramic manufacturing technology. The process includes: determining the characteristic dielectric frequency of the glaze to be fired at its critical melting temperature, where the characteristic dielectric frequency corresponds to the frequency of synergistic polarization between lead or cadmium ions and glass network forging ions; heating the product to the critical melting temperature and holding it at that temperature, applying an intermittent pulsed electric field with a frequency equal to the characteristic dielectric frequency; after stopping the electric field, subjecting the glaze melt to temperature cycling treatment, applying periodic temperature fluctuations at a reference temperature; and after the last half-cycle of cooling, rapidly cooling through the glass transition temperature zone, followed by slow cooling to room temperature. This invention, through the synergistic control of characteristic frequency electric field writing, temperature cycling screening, and gradient rapid freezing, significantly reduces the lead and cadmium leaching rate of the glaze surface without changing the glaze formulation, increasing the maximum firing temperature, or extending the production cycle.
Owner:JINGDEZHEN YATE CERAMICS CO LTD
Automobile fog lamp decoration piece injection molding mold
This utility model discloses an injection molding mold for automotive fog light trim parts, relating to the field of injection molding mold technology. It includes a base, with limiting slide rods fixedly connected to both ends of the top of the base. A U-shaped support seat is slidably connected between the two limiting slide rods. A vibration exhaust mechanism is provided inside the cavity of the base. A hydraulic cylinder assembly is fixedly connected between the two ends of the U-shaped support seat. A cooling chamber is fixedly connected to one end of the hydraulic cylinder assembly, and a feeding assembly is fixedly connected to the cavity of the cooling chamber through an opening. The base provided by this utility model, while rapidly cooling the mold, simultaneously removes air bubbles from the melt through vibration, thus solving the problem that existing automotive fog light trim part injection molding molds are inconvenient for rapid mold cooling and cannot promptly remove air bubbles from the melt, resulting in voids inside the product.
Owner:GUANGZHOU XUSHENG MOLD CO LTD
Automatic folding wing spring assembling equipment
ActiveCN224073787UExtend the production cycleincrease production costAssembly machinesSortingPhysicsProduction cycle
The utility model discloses an automatic folding wing spring assembling device, which relates to the field of automatic spring pressing and assembling and comprises an assembling and mounting table (3), a spring assembling mechanism (1) is arranged above the assembling and mounting table (3), one side of the spring assembling mechanism (1) is provided with a grabbing claw pressing mechanism (2), and the other side of the spring assembling mechanism (1) is provided with a clamping claw (3). According to the folding wing spring automatic assembling device, the prior art is improved, and in actual use, through the discharging automatic detection assembly, the problems that most existing folding wing spring automatic assembling devices are lack of integrated quality detection modules, manual secondary screening is still needed, and the production efficiency is high are solved. For example, in traditional detection, finished products need to be transferred to an independent detection station, the problems of procedure separation, response delay and the like exist, and defective products are difficult to remove in real time.
Owner:BEIJING CREATIVE VISION EXPERT VISION TECH CO LTD