31results about How to "Smooth process" patented technology

The invention belongs to the technical field of catalyst recovery, and particularly relates to a pretreatment process for waste catalyst recovery, which comprises the following steps: continuously and hermetically conveying raw materials into a pyrolysis cavity of an indirect pyrolysis furnace; a combustor at the bottom of the indirect pyrolysis furnace is started, heat is transferred into a pyrolysis cavity, the raw materials are continuously heated in the pyrolysis cavity isolated from oxygen, moisture and oil gas in the raw materials are evaporated, pyrolysis gas is discharged, and a solid phase obtained after pyrolysis is discharged into the rotary direct pyrolysis furnace; a combustor at the end part of the rotary direct pyrolysis furnace is started, flame and high-temperature flue gas are in direct contact with a pyrolyzed solid phase for heating, further oxidation and decomposition are performed in a continuous high-temperature environment, and a pyrolysis product is obtained. Oil in the raw materials is reasonably utilized, heat value loss is reduced, energy is saved, and meanwhile the process is simplified.

The present invention relates to a synthetic method of 2-methyl-α-methoxyiminophenylacetic acid methyl ester, and the method flow comprises the following: Step 1: using o-methylphenylacetic acid or o-methylphenylacetamide or o-methylphenylacetic acid methyl ester as raw material, first directly oximating and esterifying with sodium nitrite in sulfuric acid in a solvent; Step 2: "one-pot method" hydrogenation of sodium hydroxide or potassium hydroxide to control pH value, and reacting with dimethyl sulfate to obtain 2-methyl-α-methoxyiminophenylacetic acid methyl ester. The present invention uses o-methylphenylacetic acid or o-methylphenylacetamide or o-methylphenylacetic acid methyl ester as raw material, and adopts safe and reliable sodium nitrite as oximation reagent, avoids using nitrite esters that are flammable and explosive, avoids using expensive methoxyamine hydrochloride, has safe and reliable reaction, low raw material cost, and adopts "one-pot method" in the operation process, has simple and smooth process, mild reaction conditions, and is suitable for industrialized amplification production.

The utility model relates to the technical field of plastic plate processing equipment discloses a multicolor extrusion device for striped effect plastic plate, and the device comprises a shell, a shell body and a cooling and pressing assembly arranged in the shell, further comprises a water removal assembly, the water removal assembly comprises a fixed plate, a sponge, a chute and a sliding block, the chute is fixed on the shell, the sliding block is fixed on the fixed plate, the sponge is installed on the fixed plate and abuts against the surface of the cooling roller, and the sliding block and the chute constitute a sliding detachable connection, the water removal assembly can effectively absorb the condensed water on the surface of the cooling roller, the surface quality of the plastic plate is ensured, the structure makes the whole assembly be quickly disassembled, the maintenance efficiency of cleaning or replacing the sponge is greatly improved, the continuous production stability of the equipment is enhanced, and the utility model has remarkable practical value.

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

The present invention relates to an automatic powder filling and tablet making equipment and a forming method, the equipment comprises a press system, a feeding system, a mold system and a vibration leveling and even material system; the mold system comprises an upper mold and a lower mold, the upper mold has a central channel and a side wall channel, the upper port of the central channel is connected to the feeding system, and the lower port of the central channel is gradually expanded to form a concave opening; the vibration leveling and even material system comprises an axial mover, a vibration driver, a connecting cable and a vibration sealing head, the axial mover, the vibration driver and the connecting cable are connected in sequence, the connecting cable extends through the side wall channel into the central channel to connect the vibration sealing head, the shape of the vibration sealing head is basically consistent with the concave opening, can be fitted in the concave opening to close the concave opening, so that the lower surface of the upper mold is flush; the axial mover can drive the vibration driver and the connecting cable to move axially at the same time, and then drive the vibration sealing head to open or close the concave opening; the vibration driver can drive the vibration sealing head to vibrate through the connecting cable.

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The invention relates to a novel synthesis method of (E)-2-(2-chloromethylphenyl)-2-methoxyiminoacetic acid methyl ester. The method comprises the following steps: Step 1: 2-methyl-α-methoxyiminophenylacetonitrile is used as a raw material and dissolved in a methanol solvent; Step 2: the temperature is controlled at 40-50 DEG C, chlorine is slowly introduced, and the heat preservation reaction time is 5-6 hours; Step 3: methyl is chlorinated, and the hydrogen chloride generated at the same time causes the cyano group to be esterified, so that the key intermediate (E)-2-(2-chloromethylphenyl)-2-methoxyiminoacetic acid methyl ester of trifloxystrobin or kresoxim-methyl is obtained by a "one-pot method", and the temperature is lowered to 0-5 degrees after the heat preservation reaction is completed, and the product is filtered out. The invention uses 2-methyl-α-methoxyiminophenylacetonitrile as a raw material and adopts safe and reliable sodium nitrite as an oximation reagent, avoids the use of inflammable and explosive nitrites, avoids the use of expensive o-hydroxymethylphenylacetic acid lactone, has a safe and reliable reaction, low raw material cost, adopts a "one-pot method", has a simple and smooth process, a short route, and is suitable for industrialized scale-up production.

The present application discloses a heat-sealable BOPP film for cigarettes and a preparation method thereof, and relates to the technical field of BOPP film. Specifically, the film is prepared by direct co-extrusion of a three-layer structure of an outer layer, an interlayer and an inner layer. The raw materials include: polypropylene, propylene-ethylene copolymer, ethylene-methyl acrylate copolymer, crystalline tourmaline powder, 1,6-hexanediol diglycidyl ether, a mixture of trimethylsiloxyamino-terminated polydimethylsiloxane and hydroxyl-terminated methyl-3,3,3-trifluoropropyl polysiloxane, and polytetrafluoroethylene etched polyethylene wax powder. The etched crystalline tourmaline powder is prepared by etching crystalline tourmaline powder; the particle size of the crystalline tourmaline powder is 20-100nm; the thickness of the outer layer and the inner layer is 0.8-1.2μm, and the thickness of the interlayer is 18-22μm; the mechanical properties and thermal stability of the film can be improved; and the optical properties of the film are optimized by using nano-scale crystalline tourmaline powder.

The application belongs to the technical field of MAX phase material preparation, and particularly relates to a method for preparing MAX phase material based on natural metal minerals. The method comprises the following steps: mixing natural metal mineral powder, aluminum powder and graphite powder, and then ball milling to obtain activated precursor powder; pressing the activated precursor powder into a dense blank, and synthesizing a block material through self-propagating high-temperature reaction; crushing the block material and sieving to obtain a MAX phase powder material, wherein the natural metal mineral is rutile and / or chromite; and the general formula of the MAX phase powder material is (Ti 1‑x Cr x ) n+1 AlC n , wherein 0<=x<=1, and n is 1 or 2. The method is different from the prior art in reaction principle, realizes cost reduction and greenization of the whole chain of raw materials, synthesis and etching, and solves the problem of mineral impurities by using the instantaneous high-temperature characteristics of SHS.

A junction box installation assembly line comprises a high-temperature adhesive tape tearing station, an adhesive dispensing station, an installation station and a feeding station which are sequentially connected in series through a photovoltaic module conveying mechanism. The high-temperature adhesive tape tearing station is provided with a high-temperature adhesive tape tearing module used for tearing high-temperature adhesive tape on the photovoltaic module. The dispensing station is provided with a dispensing module used for dispensing at the area where the high-temperature adhesive tape is torn off on the photovoltaic module. The feeding station is provided with a feeding module used for arranging and positioning the junction box on the junction box placing table. The installation station is provided with a junction box installation module which is used for taking the junction box from the junction box placing table and installing the junction box at the glue dispensing position of the photovoltaic module. According to the whole assembly line, a plurality of installation devices in the prior art are connected into a whole in series, the connection time of all the process steps is shortened, the process flow of junction box installation is smoother, and the working rhythm is greatly improved.

According to the microbial agent, the preparation method thereof and the bio-fertilizer prepared from the microbial agent, the microbial agent is produced through the processes of fermentation, centrifugation, dissolving and mixing, spray drying and the like, the loss of viable bacteria in the process from fermentation completion to dry powder preparation is reduced, and the yield of the microbial agent is improved. The performance of the microbial agent is improved. According to the bio-fertilizer, the microbial agent is used as a core raw material, humic acid, seaweed extract and biochar are used as auxiliary materials, the biocontrol and growth promoting functions of the microbial agent and the soil improvement and growth promoting functions of the base material can be mutually enhanced, the environment which is not beneficial to crop growth such as salt and alkali can be effectively resisted, and the yield of crops is increased.

The invention discloses a platinum-rhodium alloy catalytic gauze for producing HCN (hydrogen cyanide) and a preparation method of the platinum-rhodium alloy catalytic gauze. The platinum-rhodium alloy catalytic gauze is prepared from a platinum-rhodium alloy wire with the wire diameter of 0.076 + / -0.002 mm, the content of Pt is 89.7-90.3 w%, the content of Rh is 9.7-10.3 w%, and the content of other impurities is smaller than or equal to 0.05 w%. The tensile strength of the platinum-rhodium alloy wire is larger than or equal to 700 Mpa, and the ductility is larger than or equal to 7%. The weaving mode of the platinum-rhodium alloy catalysis net is plain weaving, and the mesh number is 40 / 80; the diameter of the platinum rhodium alloy catalysis net is 1100 to 2800mm; the filling amount of the platinum-rhodium alloy catalytic nets in the oxidation furnace is 15-90 kg, the number of filling layers is 40-50, and 80 meshes and 40 meshes are combined up and down to be used in a complete set and stacked mode. When the Pt-Rh alloy catalytic gauze provided by the invention is used for producing HCN, the service life of the catalytic gauze is 8-9 months, and the conversion rate reaches 70-72%. The preparation process flow of the Pt-Rh alloy catalytic gauze is controllable in the whole process, the process is smooth, and the platinum-rhodium alloy catalytic gauze with high catalytic capacity can be produced in batches.

The utility model relates to a kind of for large castings multiple large iron type's sand-coated molding line, it belongs to mechanical field.The utility model includes iron type and model heating furnace device, iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device, iron type and model grabbing moving mechanism, variable rail transition transfer trolley mechanism and multiple load moving platform car, iron type and model conveying rail line one from right to left respectively have iron type and model heating furnace device, iron type and model grabbing moving mechanism, iron type sand shooting sand-coated device and iron type and model mould drawing separation mechanism;Iron type and model conveying rail line two from left to right respectively have the moulding station of iron type and model and multiple load moving platform car;Two transition transfer trolley rails are respectively equipped with a variable rail transition transfer trolley mechanism;Iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device are all through type.The utility model structure is reasonable, sand-coated casting quality is good, degree of automation is high, easy to install, satisfy use demand.

The invention discloses a method for preparing prothioconazole with high yield, wherein compound 1 is reacted at 0-100° C. in the presence of hydrogen peroxide and a solvent using titanium silicon molecular sieve as a catalyst, and the catalyst is filtered and recovered after the reaction, and then prothioconazole is obtained by post-processing. The method is simple to operate, has a smooth process, mild conditions, is green and environmentally friendly, has good atomic economy, the catalyst can be repeatedly reused, and the raw material conversion rate is high and the product yield is high. It has high industrial production value.

The present invention relates to the technical field of electrolytic fluorine production, and provides a refining and purification device and method for preparing high-purity fluorine gas. The equipment provided by the present invention includes a fluorine production electrolytic cell, a slag removal device, a low-pressure tank, an HF low-temperature condensation system, a fluorine gas compressor, a fluorine gas precooler and a fluorine gas distillation tower; the top of the fluorine gas distillation tower is provided with a tower top condenser, the tower bottom is provided with a tower bottom reboiler, the outlet of the tower top condenser is connected to the fluorine gas storage tank, and the outlet of the tower bottom reboiler is connected to the hydrofluoric acid recovery device; the HF low-temperature condensation system includes a plurality of HF low-temperature condensers connected in series, and the bottom of the HF low-temperature condenser is provided with an HF liquid outlet, and the HF liquid outlet is connected to the HF recovery device. The equipment provided by the present invention can purify the crude fluorine gas by the mode of condensation + distillation, with high purification efficiency, and the equipment structure is simple, suitable for industrial and continuous production, and the purity of the obtained fluorine gas can reach more than 4N, which can meet the use requirements of the semiconductor industry.

This invention belongs to the technical field of vehicle-mounted gas supply systems and gas cylinders, providing a double-layered composite gas cylinder and its preparation method, as well as a vehicle-mounted gas supply system. The composite gas cylinder includes an inner high-pressure resistant cavity, comprising a plastic liner and a first composite material layer; one end of the plastic liner has a high-pressure inlet / outlet, and the other end has a supporting member; an outer low-pressure resistant cavity includes an outer liner and a second composite material layer; the outer liner completely covers the supporting member and partially covers the high-pressure inlet / outlet, and correspondingly has low-pressure inlet / outlet openings; the inner high-pressure resistant cavity and the outer low-pressure resistant cavity are fixedly connected at both ends axially to form a co-located double-layered cavity structure; the inner cavity of the outer low-pressure resistant cavity constitutes a low-pressure chamber, and the inner cavity of the inner high-pressure resistant cavity constitutes a high-pressure chamber. The first composite material layer is configured to only bear the pressure difference between the high-pressure chamber pressure and the low-pressure chamber pressure. This invention simplifies vehicle mounting, reduces costs, and minimizes vehicle assembly space.

The application provides a method for strengthening leaching of monazite optimal-soluble residue and relates to the technical field of hydrometallurgy. The method uses two-stage leaching to strengthen leaching: in a first-stage pre-leaching procedure, the optimal-soluble residue is pre-leached by using residual acid of leaching solution generated in a second-stage strengthening leaching, so as to increase the valuable metal content of the leaching solution and reduce the residual acid concentration, thereby reducing the dissolution rate of other impurity elements and improving the filtration performance of the ore slurry; the utilization rate of the residual acid is improved, and the overall acid consumption is reduced; the first-stage pre-leaching does not need heating, and the reaction heat is used to naturally heat the ore slurry, so that the energy consumption is effectively reduced; the reaction condition is relatively mild, and the requirement for the equipment and the operating environment is low; aging or standing is not needed, the operation is continuous, and the process is smooth; in the second-stage strengthening leaching procedure, the first-stage pre-leaching residue is strengthened and leached by using high acid, so that the valuable metal leaching rate is effectively improved; after part of the elements are recovered from the optimal-soluble residue by pre-leaching, the dissolved matter is relatively reduced under the condition of high acid, the ore slurry concentration and viscosity are reduced, and the solid-liquid separation effect is good.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of novel tiamulin fumarate. The preparation method comprises the following steps: reacting pleuromutilin with thionyl chloride to generate chlorinated pleuromutilin; reacting the chlorinated pleuromutilin with thiourea, and carrying out alkali treatment, so as to generate sulfhydrylated pleuromutilin; the preparation method comprises the following steps: reacting sulfhydrylated pleuromutilin with 2-bromo-N, N-diethyl ethyl-1-amine to form tiamulin, and finally carrying out a salt forming reaction. The invention provides a synthetic route of chlorination, sulfhydrylation, alkylation and salification, and two key intermediates, namely the chlorinated pleuromutilin and the sulfhydrylated pleuromutilin, are prepared step by step, so that the accurate control of the reaction process is realized. Wherein the chlorination reaction is catalyzed by N, N-dimethylaniline, the low-temperature staged reaction is adopted, and the selectivity is good; thiourea is used for alkaline hydrolysis in sulfhydrylation, so that foul mercaptan is avoided; alkylation is carried out under weak base and low temperature; no controlled reagent is needed in the whole process, and green chemical requirements are met.

The invention provides a double-section controllable dynamic solid-liquid circulation tea and wine fermentation tank which comprises a supporting frame and a control box, the control box is fixed to the lower portion of the left side of the supporting frame, connecting columns are transversely fixed to the left end and the right end of the upper portion of the supporting frame, a stepping motor is fixed to the upper portion of the right side of the supporting frame, and a main cylinder is fixed between the two connecting columns; an upper heating plate and a lower heating plate are fixed to the upper end and the lower end in the main cylinder respectively, a partition plate is fixed to the middle of the main cylinder, a filter plate is embedded into the middle of the partition plate, an electric push rod is fixed to the top of the main cylinder, a servo motor is installed at the bottom of the main cylinder, and an adjusting assembly is arranged in the main cylinder. In the fermentation process, segmented dynamic regulation and control fermentation of tea wine can be achieved, the solid-liquid separation circulation efficiency is low, the whole process is more coherent, tea leaves cannot be deposited at the bottommost end of the fermentation chamber for a long time in the fermentation process, solid-liquid contact is more sufficient, and the quality of the tea wine is effectively improved.

The invention relates to a through-type sand shooting and coating device for a plurality of large iron molds with different cavities and a molding production method of the through-type sand shooting and coating device, and belongs to the field of machinery. The device comprises a sand shooting and coating mechanism, a moving trolley in-out track and a plurality of moving trolleys, and the moving trolleys are all arranged on the moving trolley in-out track. The sand shooting and coating mechanism comprises a frame structure, a sand shooting head, a track platform, four telescopic sand adding pipes, two sand shooting head lifting and clamping hydraulic cylinders, two sand shooting clamping bosses and four track platform lifting hydraulic cylinders; the bottom of each telescopic sand adding pipe is connected with the sand shooting head below the telescopic sand adding pipe; two sand shooting head lifting and clamping hydraulic cylinders are arranged on the upper beam, two sand shooting clamping bosses and four rail platform lifting hydraulic cylinders are arranged on the base, and the four rail platform lifting hydraulic cylinders are uniformly distributed below the rail platform. The device is reasonable in structural design, safe, reliable, low in labor intensity, low in cost, good in large iron mold sand-lined casting mold quality, high in mechanization degree and convenient to install, and meets the use requirements.

The invention relates to the technical field of metal surface treatment, in particular to a continuous selective nickel-tin electroplating method and system for a precise electronic element, and the method is used for realizing high-precision selective tin plating of a specific area and ensuring that a plating layer (especially a local plating area) has excellent binding force, uniformity and compactness; and through optimized process design and pollution control, the overall performance and the product yield of the plating layer are improved.

The invention relates to the technical field of wine making, in particular to a method for filtering beer saccharified wort through a rotary vibration sieve. The brewing process is the same as the traditional brewing process and is characterized in that a rotary vibration sieve is used for replacing a filter tank, and the technological process comprises the steps of malt crushing, a gelatinization pot, a saccharifying pot, the rotary vibration sieve, a boiling pot, a rotary precipitation tank, a plate heat exchanger, a fermentation tank, a filter, a clear wine tank and filling. A vinasse washing tank is arranged below the rotary vibration sieve, the position of the rotary vibration sieve is higher than that of the vinasse washing tank and the boiling pot, an upper outlet of the rotary vibration sieve is a vinasse outlet, a lower outlet of the rotary vibration sieve is a wort outlet, vinasse screened by the rotary vibration sieve naturally falls into the vinasse washing tank, and filtered wort naturally flows into the boiling pot. The method comprises the following steps: preparing quantitative 76-78 DEG C vinasse washing water in advance in a vinasse washing tank, quantifying the specific water quantity according to the yield demand, starting stirring in the vinasse washing tank, fully and uniformly stirring, and washing out residual liquid contained in the vinasse; pumping the mixed mash of the vinasse and the water into a rotary vibration sieve for filtering, and enabling the filtered wort to enter a boiling pot; pumping mash subjected to the saccharification process into a spin-vibration sieve for filtering, adjusting variable-frequency control of the pump, and uniformly filtering.

The invention relates to the technical field of electric arc cutting, and discloses an intelligent ship building cabin rib plate cutting device which comprises a machine shell, a traction mechanism, a main cutting mechanism and an auxiliary cutting mechanism are arranged on the machine shell, and the traction mechanism is used for feeding and conveying a steel plate to the main cutting mechanism and the auxiliary cutting mechanism; the main cutting mechanism is used for sequentially cutting a steel plate into strips and blocks, and the auxiliary cutting mechanism is used for removing one corner of a blocky steel plate before the strip-shaped steel plate is cut into the blocky steel plate. The traction mechanism, the main cutting mechanism and the auxiliary cutting mechanism are integrated, full-automatic continuous machining of cabin rib plates from flat plates to trapezoidal finished products is achieved, the overall layout is compact, actions are coherent, full-process automation of feeding, strip cutting, corner cutting, dicing and blanking is achieved through intelligent electrical and mechanical linkage control, and the production efficiency is improved. The manual intervention intensity and the skill dependence are obviously reduced, and the production safety and the standardization level are improved.

The invention relates to the technical field of guide wheel ceramic plating, in particular to bus bar traction guide wheel ceramic plating equipment which comprises a base, and a vacuum tank communicated with a vacuum pump set is fixedly connected to the surface of the base. According to the bus bar traction guide wheel ceramic plating equipment, an operator only needs to sleeve the guide wheels into the placing rods in sequence, and the dead weight of the guide wheels during falling can trigger a pneumatic chain reaction. The first guide wheel presses the lowermost limiting block to drive the pressed pneumatic piston rod, compressed gas of the first guide wheel pushes the upper-stage ejection pneumatic piston rod through the pipeline, and therefore the upper side edge limiting mechanism is pushed out of the inner groove and exactly abuts against the upper surface of the guide wheel to form limiting. And the guide wheels are automatically and repeatedly placed along with successive placement of the guide wheels, and finally all the guide wheels are automatically separated and axially positioned by the side edge limiting mechanisms which extend out in pairs. Rapid batch feeding of multiple workpieces is achieved, it is ensured that constant isolation space exists between the workpieces, and preconditions are created for subsequent uniform coating.

The invention relates to a through-type drawing device and method for a plurality of large iron molds with different cavities, and belongs to the field of machinery. The device comprises a movable trolley track, a hoisting travelling crane used for conveying the iron mold, a plurality of movable trolleys capable of bearing the iron mold and the model, and a fixed iron mold and model drawing separation mechanism arranged on a drawing separation station, and the plurality of movable trolleys are all arranged on the movable trolley track; movable trolley rails are arranged on the two sides of the fixed type iron mold and model drawing separation mechanism, and a lifting crane is arranged above the fixed type iron mold and model drawing separation mechanism. The invention further provides a working method of the through-type drawing device for the multiple large iron molds with the different cavities. The device is reasonable in structural design, safe, reliable, convenient to install, reliable in operation, low in labor intensity, high in mechanization degree, good in drawing quality of iron mold casting, smooth in technological process and capable of meeting use requirements.

The invention discloses a method for green preparation of ammonium persulfate from sodium sulfate solid waste based on a membrane technology, and belongs to the technical field of sodium sulfate solid waste recycling, and the method comprises the following steps: S1, system assembly and electrolyte preparation: assembling a three-chamber electrolytic bath according to the sequence of an anode chamber, a cation exchange membrane, an intermediate chamber, a precise control membrane and a cathode chamber, preparing an anode chamber sulfuric acid electrolyte, an intermediate chamber sodium sulfate raw material solution and a cathode chamber ammonium bicarbonate initial solution; s2, starting the system and establishing a steady state: introducing ammonia gas into the cathode chamber and adjusting the flow of the ammonia gas to dynamically stabilize the pH value of the cathode chamber in a target interval of 9.0-9.5 so as to establish an NH4 < + > storage area in the cathode chamber; s3, continuous operation and dynamic material balance: after the system enters a steady state, extracting an anode chamber mixed solution, and extracting a part of cathode chamber mixed solution in a cathode chamber; supplementing materials in each chamber; s4, crystallizing and purifying ammonium persulfate; according to the invention, the technical problem of direct electro-synthesis of ammonium persulfate from sodium sulfate is solved through the innovation of a precise control membrane design and an ion migration strategy.

This application discloses a chemithermomechanical pulp, a core layer pulp, and cigarette white cardboard, and their preparation methods, belonging to the field of white cardboard technology. The chemithermomechanical pulp is obtained by treating chemithermomechanical pulp raw materials with hydrogen peroxide decomposing enzymes; the chemithermomechanical pulp includes chemithermomechanical softwood pulp and chemithermomechanical hardwood pulp; the amount of hydrogen peroxide decomposing enzyme added is 200-400g per ton of chemithermomechanical pulp, and the residual content of oxidizing substances is less than 25ppm. This invention, by adding hydrogen peroxide decomposing enzymes to the chemithermomechanical pulp, effectively decomposes residual oxidizing substances in the pulp, inhibiting the oxidation of lignin and other substances to methanol. The resulting core layer pulp and cigarette white cardboard have reduced methanol generation, achieving the goal of inhibiting methanol generation at its source.

The invention discloses calcium-based lubricating grease with an anti-hardening function and a preparation method of the calcium-based lubricating grease, and belongs to the technical field of gear lubricating grease. The prepared lubricating grease is endowed with excellent high temperature resistance, good extreme pressure wear resistance, hardening resistance and pumping performance through calcium and aluminum composite thickening; the use amount of the calcium acetate powder in the raw materials is large, the cost is saved, the peculiar smell in the production process is small, and the health of production personnel can be protected; the lubricating grease is synthesized by adopting a one-kettle method, the equipment is simple, the process is coherent, and the synthesized lubricating grease does not contain harmful elements such as heavy metals and is environment-friendly; various groups in molecules of the prepared synergistic antioxidant play a synergistic role, and the oxidation resistance and extreme pressure wear resistance of the lubricating grease can be greatly enhanced to a certain extent; therefore, the prepared lubricating grease has important application value in the technical field of gear lubricating grease, and is suitable for mechanical equipment such as transmission bearings and hubs in a high-temperature environment.

The application belongs to the field of semiconductor MEMS device processing, and particularly relates to a structure-assisted electromagnetic MEMS micromirror processing method, which improves the problems of high processing complexity and high processing cost existing in the prior art. By using the schemes of selective silicon-silicon bonding after local roughening, thick silicon MEMS processing technology based on conventional silicon-silicon bonding, fusion of high-precision laser cutting in the MEMS processing flow, increase of temporary support and heat dissipation structure and the like, the dependence of the MEMS micromirror processing process on the temporary bonding and debonding equipment and technology required for wafer processing can be reduced, the machine time occupation of the single crystal silicon dry etching equipment is reduced, the processing cost is controlled, the mutual compatibility of each single-step process in the process flow is improved, the processing can be realized only by using the combination of conventional equipment and its process, the complexity of the processing process is reduced, the processing cost is reduced, and the electromagnetic MEMS micromirror has good manufacturability.

The invention discloses a preparation method of a large thick-wall hard alloy mixture. The preparation method comprises the following steps that 1, various raw materials needed for preparing the mixture are put into a 300-liter tilting-type ball mill to be subjected to ball milling; step 2, the slurry is sieved by a 325-mesh sieve, and the sieved slurry is put into a large barrel to be precipitated for 24 hours; step 3, putting the precipitated slurry of which the absolute ethyl alcohol on the surface is filtered out into a 300-liter vertical stirring dryer, and drying for 4-6 hours; cooling to room temperature after the powder is dried; step 4, continuing to mix the rubber forming agent in the vertical stirring dryer; and step 5, filling inert gas into the material barrel filled with the mixed material doped with the glue for protection, then lifting the feeding cover for discharging, sieving, sampling and detecting, and packaging qualified products into the barrel. All operations including drying, glue mixing, drying and the like can be completed on the same equipment.