53results about How to "Increased process safety" patented technology

This invention relates to a fully automatic integrated machine for primary processing of basa fish, belonging to the field of fish primary processing equipment technology. It solves the problems of low automation levels, lack of dedicated equipment, poor adaptability of general-purpose equipment, uncontrollable gutting depth leading to fish meat contamination, and incomplete or damaged skinning; low efficiency and significant damage to fish meat due to fragmented multi-stage processing; and cross-contamination between viscera, head, tail, and finished product collection. A synchronous belt conveyor clamping device is horizontally mounted on the frame, with two sets of synchronous belt conveyors arranged side-by-side to form a clamping and conveying area, stably clamping the fish during transport. The processing device is sequentially equipped along the conveying direction with viscera removal, head and tail removal, back opening, skinning, and collection devices, enabling continuous automated viscera removal, head and tail removal, back opening, skinning, and finished product collection for basa fish. This invention achieves fully automated primary processing of basa fish, significantly improving processing efficiency, operational safety, and product reliability.

This invention discloses a Pickering emulsion based on silk fibroin self-assembled particles and its preparation method. The preparation method includes the following steps: adjusting the pH of the silk fibroin solution to 4.0-4.5, adding NaCl to a final concentration of 0.05-0.1 mol / L, mixing, and then heating to 40-50 °C and allowing it to stand at a constant temperature. Using the obtained silk fibroin self-assembled particle dispersion as the aqueous phase and vegetable oil as the oil phase, the mixture is mixed with excipients and homogenized by high-speed shearing to obtain a primary emulsion. This primary emulsion is then treated by high-pressure microfluidic jet to obtain the Pickering emulsion based on silk fibroin self-assembled particles. This method requires no chemical modification or exogenous reagents, is green and simple, and does not use organic solvents. It can prepare emulsions with high biosafety and high storage stability without emulsifiers, improving process safety and scalability, and broadening its application in the food, cosmetics, and biopharmaceutical fields.

The utility model discloses a fixing clamp for silicon carbide crystal ingot plane grinding machining, and relates to the technical field of silicon carbide crystal machining. Comprising a supporting mechanism, a rotary adjusting mechanism and a plurality of clamping mechanisms. The supporting mechanism is used for supporting and positioning the silicon carbide crystal ingot, the rotary adjusting mechanism and the clamping mechanism; the rotary adjusting mechanism comprises a rotary table, an adjusting rod and a locking arm; the clamping mechanism comprises a self-adaptive adjusting clamping jaw, the clamping jaw is connected with a first linear bearing, the bottom of the first linear bearing is connected with a rubber-coated bearing, and the rubber-coated bearing is used for converting the rotating motion of the turntable into the linear motion of the clamping mechanism on the first guide shaft; according to the utility model, the relative distance of the clamping jaws is adjusted to adapt to different crystal ingot diameters, and meanwhile, the clamping jaws have the compression force of the springs, so that the crystal ingot can be clamped more firmly, the processing safety is improved, and the product damage rate is reduced.

The utility model relates to aluminium material draw bending technical field discloses a draw bending straightening device for aluminium material processing, including operation platform, the bottom fixed connection of operation platform has four support legs, four the bottom edge of support leg does smooth chamfer design, the top right side fixed connection of operation platform has three bending assembly, the inboard fixed connection of bending assembly has location component, the top left side fixed connection of operation platform has the setting component, the setting component includes the sliding slot, the sliding slot is set up in the inside of operation platform, the inside slide connection of sliding slot has the lead screw, the top rotatory connection of lead screw has the support block. In the utility model, through setting adjustable arc setting plate, using the sliding fit of lead screw in sliding slot, drive support block and setting plate flexible adjustment position, combining the sliding guide of slide and top plate, can accurate adaptation different arc requirement's aluminium material processing, improve processing applicability and finished product quality.

A method for manufacturing a large-scale balance weight of a steel sheet pile ship lift, which simplifies the processing flow of the large-scale balance weight. The method first cuts a continuous casting steel blank into single pieces of steel sheet pile with grooves, and measures and marks the steel sheet pile. Then, two groups of steel sheet pile are assembled together by processing and pre-installing gap pads. After the preliminary assembly is completed, the balance weight is marked again, and then the locking bolt holes, pin shaft holes and lifting lug holes are drilled and processed, and the holes are counterbored. The next step is to cut and install the edge plates at the top and bottom of the grooves. The trial lifting is performed and the lifting shaft hole reinforcing plates are pre-installed to ensure the stability of the structure. The stop seat plates are further processed and installed to provide protection for the final stability. Finally, the overall performance of the balance weight is verified by the second trial lifting, and the remaining edge plates are pre-installed. The present application can realize efficient processing of large-scale steel sheet pile balance weight by using conventional general equipment.

The application provides a low dielectric constant film forming method, which is applied to the field of semiconductor technology. Specifically, in the low dielectric constant film forming method provided by the application, air or inert gas and other gases are fully blown into a silicon-containing precursor liquid source required for film formation in the form of micro-nano bubbles by using a micro-nano bubble generating device, so that a low dielectric constant film with a porous structure can be formed without using chemical pore-forming agents such as organic pore-forming agents; and in the low K film forming method provided by the application, micro-nano bubbles are introduced as pore-forming templates by blowing air in the film precursor liquid source, so that the porosity regulation difficulty of the formed low K film can be reduced while achieving the purposes of reducing the amount of chemicals used, reducing the process manufacturing cost and improving the process safety, and then the process steps and the tape-out cost are finally reduced.

The invention provides tri (dimethylamino) cyclopentadienyl cerium as well as a preparation method and application thereof. The tri (dimethylamino) cyclopentadienyl cerium provided by the invention combines the spatial stability of a cyclopentadienyl ligand and the high reaction activity of a dimethylamino ligand, has appropriate volatility and lower thermal decomposition temperature, and is a cerium-based precursor with great potential. The preparation method of the tri (dimethylamino) cyclopentadienyl cerium provided by the invention has a better target product yield. The cerium-based precursor provided by the invention is tris (dimethylamino) cyclopentadienyl cerium, and has a structural formula shown in the specification.

The utility model relates to the related technical field of riveting connection, in particular to a high-adaptation riveting device based on angle fine adjustment, which is arranged on a movable platform and comprises an angle adjusting mechanism, and an air gun is arranged at the movable end of the angle adjusting mechanism. The angle adjusting mechanism comprises a telescopic piece and a driving assembly arranged on the moving platform and used for controlling the telescopic piece to deflect. The driving assembly is started to work to control the telescopic part to deflect relative to the moving platform, so that the position of the air gun can be finely adjusted, the telescopic part executes the telescopic action in the deflection process, the angle of the air gun can be accurately adjusted, and meanwhile the angle of the air gun can be accurately adjusted. The multi-angle adjustment can be achieved, the actual thickness of a plate can be better adapted, it is ensured that the riveting process is conducted smoothly, meanwhile, it can be ensured that the riveting nut can be correctly installed at different positions and angles, and the installation problem caused by angle deviation is avoided.

The utility model relates to working fluid filtering treatment technical field, and disclose advanced ceramic grinding processing working fluid filtration supply system, including the casing, still include: the baffle, the baffle fixedly connected in the casing, the casing front side is provided with the supply area, the casing right side is provided with the reflux area, the casing is provided with the filter mechanism, the filter mechanism surface is provided with the assembly mechanism, the filter mechanism includes: terminal filter, terminal filter fixedly connected in the casing, this advanced ceramic grinding processing working fluid filtration supply system, through setting up the supply area to the working fluid and makes the whole device to the working fluid supply of processing area and to the filtration of working fluid separate, namely, supply pump and reflux filter assembly independent work, both ensure the double -deck effective filtration to working fluid, and can ensure the flow and pressure of working fluid supply to processing area.

The application discloses a preparation method of 1,2-propylenediamine, which comprises the following steps: (1) 2-phenyl-5-methyl-2-oxazoline, ZIF-8 catalyst and liquid ammonia are added into a high-pressure reaction kettle, and after temperature rising, stirring and filtration, benzoyl 1,2-propylenediamine is obtained; (2) the benzoyl 1,2-propylenediamine obtained in the step (1), methanol and an alkali metal catalyst are added into an atmospheric pressure reaction kettle with a reflux device, after temperature rising and stirring, sulfuric acid is added to neutralize the alkali metal catalyst, after neutralization, the mixture is filtered, and the filtrate is subjected to distillation to obtain a mixture of methyl benzoate and 1,2-propylenediamine; (3) the mixture obtained in the step (2) is separated by rectification to obtain 1,2-propylenediamine products. The preparation method can reduce the production cost, the process condition is relatively mild, hydrogen is not needed to participate in the amination reaction, the process safety is higher, the raw material conversion rate is high, close to 100% conversion, the synthesis yield is higher than 90%, the preparation process is efficient and safe.

The utility model discloses a connector positioning and PIN pressing integrated pneumatic machining device which comprises a case, a sliding positioning assembly and a semi-closed riveting assembly. The sliding positioning assembly comprises a carrier plate, a positioning sinking groove is formed in the upper portion of the carrier plate, and a traction rod is fixedly connected to one side of the carrier plate. The semi-closed riveting assembly comprises an assembling frame, a riveting air cylinder is fixedly assembled on one side of the assembling frame, a pair of piston rods is slidably assembled in the riveting air cylinder, the ends, located outside the assembling frame, of the piston rods are fixedly connected with a driving plate, a guiding connecting plate is fixedly connected to the lower portion of the driving plate, and a riveting mold is fixedly connected to the lower portion of the guiding connecting plate. According to the connector positioning and PIN pressing integrated pneumatic machining device, the sinking groove is adopted to position the PIN of the part, the riveting error of the PIN is reduced, meanwhile, the downward pressing die is subjected to safety protection, and the machining safety of the PIN of the connector is improved.

The invention discloses a self-adaptive stress release workbench for restraining deformation of a laser cutting plate, and relates to the field of laser cutting machining, the self-adaptive stress release workbench comprises a rack, a plate clamping frame, a workpiece receiving assembly and a self-adaptive supporting assembly, the plate clamping frame is slidably connected to the rack through a first rail, and the workpiece receiving assembly is slidably connected to the rack through a second rail; the workpiece receiving assembly is slidably connected to the middle of the rack through a second rail and located below the plate clamping frame, the self-adaptive supporting assembly is arranged on the rack in a liftable mode, and the working end of the self-adaptive supporting assembly makes contact with the bottom of a plate clamped and fixed to the plate clamping frame. The working end of the self-adaptive supporting assembly can respond to the stress change in the plate in the cutting process of the plate to generate multidirectional micro displacement, so that dynamic supporting and stress reduction of the plate are achieved. In the cutting process, the internal stress of the plate can be responded and reduced in real time through the dynamic supporting system, and meanwhile precise cooperative control over the supporting assembly and the workpiece receiving system is achieved.

The invention discloses an intelligent machining device and method for a coal mine underground dangerous anchor cable, and belongs to the technical field of coal mine intelligent equipment and safety control. The intelligent machining device comprises an executing mechanism which comprises a feeding mechanism, a heating mechanism, a cutting-off mechanism, a traction mechanism and a collecting mechanism and is used for sequentially executing feeding and positioning, local heating, cutting-off, residual end traction and falling material collection on the dangerous anchor cable; the data acquisition device is used for acquiring static parameters of the dangerous anchor cable and operation state parameters of the execution mechanism; the programmable logic controller is used for driving the actuating mechanism to act according to the control instruction and collecting field input and output signals; and the edge intelligent controller is connected with the programmable logic controller and the data acquisition device, and is used for generating a control instruction according to the static parameters and the running state parameters and sending the control instruction to the programmable logic controller. And unmanned or few-person intelligent safe machining of the dangerous anchor cable can be achieved in the underground complex environment.

The application belongs to the technical field of tailings conveying, and discloses a buffer type stirring and slurry mixing device for tailings grading conveying, which comprises a stirring outer tank, a buffer inner tank movably arranged in the stirring outer tank, an elastic support structure for suspending the buffer inner tank on the stirring outer tank, and a self-adapting water inlet assembly and a mixing and stirring assembly. The application effectively prevents overpressure of a conveying pump and pipeline blockage caused by too thick slurry, avoids insufficient strength and segregation and delamination of a filling body caused by too thin slurry, and greatly improves process stability and safety of a filling system.

The utility model provides a box shell machining production line which comprises a box shell injection molding assembly, a first box shell conveying assembly, a box shell carrying assembly, a box shell punching assembly and a second box shell conveying assembly. The guiding unit, the limiting plate and the positioning unit are sequentially installed on the first conveying platform, the guiding unit guides a box shell on the conveying platform, the limiting plate limits the end portion of one end of the box shell, and the positioning unit positions the two sides of the box shell. The box shell carrying assembly comprises a supporting frame, a mechanical arm unit and a suction cup unit, and a suction cup set at the bottom of the suction cup unit is used for adsorbing, grabbing and releasing the box shell. According to the box shell punching machine, conveying, positioning, carrying and punching of box shells can be automatically completed, the machining efficiency and safety of the box shells are improved, and the precision, stability and consistency of products can be improved.

The utility model discloses a special fixture for a multi-station sample milling machine, which comprises a support, a supporting mechanism and a clamping mechanism, and the supporting mechanism realizes self-adaptive supporting and resetting of an aluminum sample through a vertical plate, a transverse plate, a guide shaft and a spring; the clamping mechanism drives a movable clamping plate through a first air cylinder, multi-station synchronous clamping is achieved in cooperation with a V-shaped clamping groove and an anti-skid groove of a fixed clamping plate, and the clamping state is monitored in real time through a front sensor and a rear sensor. The clamp can clamp aluminum samples with different diameters and heights, the supporting plate can adjust the heights of the aluminum samples to keep consistent, follow-up sample milling is facilitated, the problems that traditional clamping is low in efficiency, poor in stability and poor in adaptability to the aluminum samples with different specifications are solved, and the clamp has the advantages of being reliable in state detection, high in specification adaptability and the like. The aluminum sample milling device is suitable for efficient and safe milling of aluminum samples, and the consistency of the milling effect can be guaranteed.

An oxygen-deficient nanomaterial, its solid-phase molten zinc thermal reduction preparation method, and its application. This invention uses zinc powder as a reducing agent. The target metal oxide, such as anatase TiO2, is uniformly mixed with zinc powder, followed by mild high-temperature annealing in an inert gas atmosphere. The product is then washed with dilute acid / alkali to obtain oxygen-deficient TiO2. 2‑x Nanomaterials. Similarly, oxygen-deficient SnO can be prepared using this method. 2‑x ZrO 2‑x and BaTiO 3‑x Materials. Compared to existing techniques for preparing oxygen-deficient nanomaterials, such as high-temperature hydrogen reduction, complex structure carbonization, and solvothermal reduction, this invention employs solid-phase molten zinc thermal reduction technology. Using environmentally friendly and low-cost zinc powder as a reducing agent, oxygen-deficient nanomaterials are prepared through a mild and high-temperature solid-phase molten zinc thermal reduction process. This method has no special requirements for production equipment, exhibits universal processing applicability and industrial production compatibility, and has successfully prepared a series of defect nanomaterials with adjustable oxygen defect concentrations. These nanomaterials have been applied to the negative electrode protection of zinc-ion batteries, effectively improving the cycle life of zinc batteries.

The invention belongs to the technical field of polishing machines, and particularly discloses a curved optical glass polishing machine which comprises a cabinet, a splash-proof bin is arranged above the cabinet, a profiling suction and abutting mechanism is arranged in the splash-proof bin, and a PLC is fixedly installed on the outer wall of one side of the cabinet. The rear end of the cabinet is connected with a polishing mechanism through an arranged storage lifting mechanism, a suction mechanism is arranged on one side of the interior of the splash-proof bin in a communicating mode, the profiling suction abutting mechanism further comprises a profiling disc table, the outer edge of the profiling disc table is bent downwards, and a wear-resisting flexible particle pad is machined on the outer surface of the profiling disc table. According to the curved glass polishing device, dynamic balance fixing can be achieved, the problems of displacement, scratches and damage caused by unstable fixing in the curved glass polishing process are solved, and high-precision, self-adaptive and full-automatic polishing is achieved.

The present application provides a colloid bitumen dispersant and its preparation method and application, and belongs to the technical field of oil field exploitation. It comprises the following components: dispersant mother liquor containing hyperbranched complex 60-100 parts, solvent 20-30 parts, sodium dodecyl benzene sulfonate 2-5 parts, alpha-alkyl sodium sulfonate 1-3 parts, ethylenediaminetetraacetic acid disodium 2-5 parts, low carbon alcohol 5-15 parts, antioxidant 0.5-2 parts. Through the design of complex structure, the construction of green solvent system and the innovative synthesis process, the present application realizes the synchronous collapse of colloid hydrogen bond network and asphaltene pi-pi accumulation, significantly reduces the dispersant dosage and preparation energy consumption, and has broad application prospect.

This utility model relates to a thread grinding machine, including a base, a chuck and a tailstock for clamping workpieces, and a horizontally movable wheel frame. A grinding wheel spindle and a drive motor are mounted on the wheel frame. A material discharge hole is formed on the upper surface of the base between the chuck and the tailstock. A funnel-shaped material collection bin with openings at both the top and bottom is installed at the bottom of the material discharge hole. A cleaning brush adapted to the inner wall of the material collection bin is installed inside the bin. The cleaning brush is connected to the base via a horizontal slide, and one end of the cleaning brush is connected to the wheel frame. The cleaning brush moves synchronously with the wheel frame, cleaning debris adhering to the inner wall of the material collection bin. This utility model, by providing a material discharge hole on the base and installing a funnel-shaped material collection bin, utilizes the horizontal movement of the wheel frame to drive the synchronous movement of the cleaning brush, achieving periodic cleaning of the inner wall of the material collection bin, effectively avoiding equipment failure and reduced machining accuracy caused by debris accumulation.

This utility model relates to the field of flattening roller technology, and proposes a flattening roller structure, including a fixing part and a flattening part. The flattening part is coaxially fixed to the fixing part and is used to flatten the electrode tab. The flattening part has a conical structure, and the outer diameter of the end of the flattening part near the fixing part is larger than the outer diameter of the end away from the fixing part. It also includes a blocking part, which is coaxially fixed to the end of the flattening part away from the fixing part, and the periphery of the blocking part extends outward from the periphery of the flattening part. This utility model, by providing a blocking part at the end of the flattening part and allowing the periphery of the blocking part to extend outward from the periphery of the flattening part, allows the blocking part to guide the electrode tab when the flattening part flattens it, preventing the electrode tab from blocking the center hole of the winding core. This eliminates the need for other components to block the center hole of the winding core in the flattening mechanism, reducing the structural complexity of the flattening mechanism and improving its overall performance and cost-effectiveness.

The invention discloses a supergravity continuous shear mixing device and method for mixing high-viscosity powder and liquid. The device comprises a device body, and a feeding area, a high shear area and a material collecting cavity which are communicated with one another are sequentially arranged in the device body from bottom to top; the high-shear area comprises a multi-spiral protruding prismatic table rotor and a high-shear taper pipe stator which are coaxially arranged along the central axis of the device body, the multi-spiral protruding prismatic table rotor comprises a spiral flow guide circular truncated cone rotor body, a liquid center distribution flow channel is formed in the center of the multi-spiral protruding prismatic table rotor, and a plurality of protruding prismatic tables distributed in a surrounding mode along the spiral track are evenly arranged on the outer side wall in the circumferential direction. A continuous spiral groove is formed between every two adjacent protruding prismatic tables, and a plurality of radial micropores communicated with the liquid center distribution flow channel are evenly formed in the area, close to the protruding prismatic tables below the spiral groove, of each spiral groove. According to the method, the problems of non-uniform micromixing, low efficiency and safety risk caused by dependence on macroscopic convection and random shearing in the traditional mixing technology can be fundamentally solved.

This application provides a dual-station pneumatic punch press, comprising: a frame with a base mounted on it; a punching table including a second punching plate fixedly mounted above it, and a second template mounted on the second punching plate; a sliding assembly disposed between the punching table and the base to achieve horizontal movement between the punching table and the base; and a punching assembly including a cylinder and a first punching plate integrally connected to the cylinder, the first punching plate being mounted on a first template. This application achieves a breakthrough improvement in production efficiency, processing accuracy, and safety performance through an innovatively designed dual-station sliding rail pneumatic punching system. The dual-station parallel operation architecture allows workpiece clamping and punching processes to be performed simultaneously. Combined with a servo-driven switching mechanism, the overall processing cycle for a single piece is compressed. Simultaneously, the early intervention positioning via long guide columns eliminates the risk of mold off-center loading, improving the yield rate of stamped parts. Compared to traditional punching equipment, the low-pressure pneumatic system consumes less energy and has lower maintenance costs.

The invention provides a dual-motor anti-backlash heavy-load numerical control rotary table, and belongs to the field of numerical control machine tools, the dual-motor anti-backlash heavy-load numerical control rotary table comprises a main base body, a base protection top block is fixedly connected to the top surface of the main base body through a horizontal bolt, and a working platform is horizontally arranged on the top surface of the base protection top block. The rotary table can accurately rotate and position according to a preset angle, and a high-precision machining reference is provided for a workpiece, so that the size precision and the shape precision of a machined part are remarkably improved, and the requirement for high-precision machining is met. For example, in the machining process of aerospace parts, the rotary table can ensure that the machining precision reaches the micron level for machining of some holes, contours and other characteristics with extremely high precision requirements, the quality and performance of the parts are effectively improved, overall workpiece machining can be more accurate and efficient, and the machining efficiency is improved. And multiple directions can be expanded to meet the machining requirement, the bearing capacity is greatly improved, and the range of the types of machined workpieces is further widened.

The invention relates to the field of petrifaction, and discloses a green refining method of crude caprolactam, which comprises the following steps: S1, mixing crude caprolactam with a crystallization solvent, carrying out primary crystallization, carrying out solvent removal, heavy component removal and light component removal on a primary mother solution obtained by separation, mixing the recovered solvent and caprolactam with crude caprolactam, and recrystallizing; or removing the solvent from the primary mother liquor, recovering, concentrating, performing secondary crystallization, and separating to obtain secondary crystals and secondary mother liquor; carrying out solvent removal, heavy component removal and light component removal on the secondary mother liquor, mixing the recycled caprolactam with the primary mother liquor for secondary crystallization, separating to obtain secondary recycled crystals, mixing the secondary recycled crystals with secondary crystals and crude caprolactam, and then carrying out primary crystallization again; and S2, adsorption refining. According to the method disclosed by the invention, efficient and green refining of the crude caprolactam can be realized, the finally obtained caprolactam has high purity, low chroma and high yield, and the method has obvious advantages in production of high-end caprolactam products with extremely high chroma requirements.

The utility model relates to steel pipe bending technical field, concretely is a kind of bending device for steel pipe processing, including installation base, the upper end fixedly connected with mounting plate of installation base, opening is set up on the outer wall of mounting plate, the outer wall of mounting plate is fixedly installed with the abutting mechanism that can abut to steel pipe, the front end of mounting plate is also fixedly connected with electric telescopic arm by bolt, steel pipe hardness drops, it is explained that its quality exists problem, extrusion sensing mechanism can carry out the extrusion force of electric telescopic arm to leak force, the action of prompting that also played to avoid secondary injury of steel pipe, the steel pipe bending device innovative integration hardness detection and equipment protection function, the compression state of spring when steel pipe is under pressure Intuitive judgment hardness, spring keeps original state when hardness reaches standard, can be bent normally, linkage mechanism automatically triggers to deflate and unloads, reduces extrusion degree, avoids mould and equipment overload damage.

The utility model discloses a cross-linked insulation material processing feeding mechanism which comprises a shell, cylinders are fixedly connected to the four corners of the upper surface of the shell, threaded sleeves are connected into the cylinders in a threaded mode, the tops of the threaded sleeves are rotationally connected with fixing bases through bearings, and a top plate is fixedly connected to the tops of the multiple fixing bases. A round hole is formed in the top of the top plate, a discharging pipe is fixedly connected into the round hole, the threaded sleeve can be driven to rotate in the cylinder, the threaded sleeve drives the top plate to ascend and descend, and therefore the device can adapt to the heights of different production devices, additional auxiliary tools are not needed, labor intensity is reduced, and production efficiency is improved; and moreover, the coordination consistency of four-corner lifting actions can be ensured, equipment inclination or uneven material distribution caused by height deviation is avoided, the machining precision and safety are improved, continuous and stable conveying of insulating materials can be achieved, and manual intervention and material blocking risks are reduced.

This invention relates to the field of precision machining technology for semiconductor materials, and in particular to a chemical mechanical polishing (CMP) slurry, its preparation method, and its application. The CMP slurry comprises the following components by mass percentage: 6-12% composite abrasive, 3-7% composite oxidant, 2-5% complexing agent, 0.5-2% phosphine detoxifier, 0.3-1.5% dispersant stabilizer, 0.1-1% pH adjuster, and water as the balance. The composite abrasive is a composite material of alumina and silicon dioxide. The composite oxidant includes sodium hypochlorite solution and hydrogen peroxide solution. This invention, through the rational proportioning and synergistic effect of the composite abrasive, composite oxidant, complexing agent, phosphine detoxifier, dispersant stabilizer, and pH adjuster, is not only suitable for single substrates but also compatible with the CMP polishing of three typical third-generation semiconductor materials: indium phosphide, gallium arsenide, and germanium. It exhibits good versatility and process adaptability, helping to reduce production costs and process changeover complexity.

This invention relates to the field of N-(2,4-dinitrophenyl)-4-nitrobenzamide preparation technology, specifically to a green method for preparing nitramide compounds. The method involves adding a catalyst and dispersant to a reactor and mixing them uniformly. Then, a first and a second stream of materials are simultaneously added dropwise to the reactor for reaction. The temperature within the system is controlled during the dropwise addition. After the dropwise addition is complete, the temperature is increased to continue the reaction. After the reaction is completed, N-(2,4-dinitrophenyl)-4-nitrobenzamide is obtained through post-treatment. The first stream is a dispersion containing 4-nitro-N-phenylbenzamide, and the second stream is a nitrating agent consisting of a uniform mixture of N₂O₅ and nitric acid. This preparation method features high product conversion rate, a mild reaction process, safe and controllable production process, effectively reduces the amount of residual intermediates, and minimizes pollution.

The application discloses a process for improving the yield of HCN prepared by the Andrussow method, and belongs to the technical field of HCN preparation. The application improves the conversion rate of methane by using the residual methane in the tail gas after the HCN removal and dehydration reaction, improves the methane selectivity by using CO in the tail gas to inhibit methane decomposition, and improves the conversion rate of methane to HCN by using H2 in the tail gas, H2 combustion to provide heat instead of the heat provided by methane decomposition, thereby improving the overall reaction yield, eliminating the residual ammonia in the gas after the reaction, saving the ammonia removal step, reducing the air consumption, improving the ratio of ammonia and methane to oxygen, making the reaction in the far explosion zone, and improving the process safety.