121results about "Sub-atmospheric pressure processes" patented technology

The invention relates to the technical field of mine solid waste treatment and carbon dioxide sealing and storage, and particularly discloses a system and a method for sealing and storing carbon dioxide by utilizing coal-based solid waste and mine water to prepare slurry. The system comprises a cement bin, a gangue bin, a coal ash bin, a gasified slag bin, a mine water storage tank, a stirring reaction kettle, a carbon dioxide storage tank, a slurry temporary storage tank, a vacuum pump and a slurry pump, and the stability and adsorption efficiency of carbon dioxide fixation are improved in the mode that coal-based solid waste, mine water and carbon dioxide are subjected to chemical reaction and physical adsorption; meanwhile, the prepared backfill slurry has high-strength anti-pressure ability, the stability of the backfilled underground goaf is better improved, further, coal-based solid waste and mine water are utilized for waste recycling, and the carbon dioxide storage cost is reduced.

The invention relates to a preparation method and system of high-molecular-weight polyethylene glycol oxalate, and the preparation method comprises the following steps: adding oxalic acid diester, ethylene glycol and a first catalyst, and carrying out transesterification to obtain an ester; adding a second catalyst, and carrying out a pre-polycondensation reaction on the esterified product to obtain a glycol oxalate oligomer; polymerizing the ethylene glycol oxalate oligomer, and carrying out final polymerization reaction to obtain polyethylene glycol oxalate; the molar ratio of the oxalic acid diester to the ethylene glycol is (1.05-1.3): 1. Compared with the prior art, by controlling excessive oxalic acid diester in the raw material ratio, namely controlling the molar ratio of oxalic acid diester to ethylene glycol to be greater than 1, the reaction rate of ethylene glycol is improved, self-polycondensation of ethylene glycol is prevented, further increase of molecular weight is facilitated, and meanwhile, the thermal performance of the product is improved.

The invention relates to an interfacial polycondensation tubular reactor for preparing polycarbonate, which is characterized in that a U-shaped structure is adopted, a spiral turbulent flow device is arranged in a straight pipe section, and a high-viscosity melt is disturbed, laminar flow is eliminated and mixing is enhanced in an active or passive mode; a multi-stage independent temperature control module is arranged outside, so that the temperature of each reaction section is accurately regulated and controlled. The inlet, the outlet and the temperature control interface of the reactor adopt high-temperature-resistant and corrosion-resistant sealing design, and U-shaped modular flange connection is convenient for disassembly, assembly, cleaning and continuous expansion. The design solves the problems of non-uniform heat transfer and material residue of a traditional horizontal disc reactor, poor flow distribution of a tubular reactor and the like, and has the following advantages: the melt flow uniformity is improved, and local overheating and excessive polycondensation are avoided; the reaction efficiency and molecular weight distribution are optimized through segmented temperature control; the structure is compact without dead angles, the side reaction and inner wall corrosion risks are reduced, and the device is suitable for efficient continuous synthesis of polycarbonate.

The present invention relates to a system, method, and use for the unloading of solid material particles used in a physical, chemical, and / or biological process in a tank and for the inertization of the tank. The receiving tank and the pump are fluidically connected. The inert gas supply device is fluidically connected to the tank and to at least one injector. The at least one injector is arranged along the transport line that connects the tank to the receiving tank and is configured to inject inert gas into the transport line. The pump is configured to generate negative pressure in the receiving tank and in the tank, and the inert gas supply device is configured to insert inert gas into the tank and supply inert gas to at least one injector, to allow the displacement of solid material particles from the tank to the receiving tank.

The invention relates to the technical field of manufacturing of fusible polytetrafluoroethylene resin, in particular to a method for treating an unstable terminal group of fusible polytetrafluoroethylene, which is used for solving the problem that the unstable terminal group cannot be thoroughly treated in the prior art. The method comprises the following steps: heating fusible polytetrafluoroethylene resin to a molten state, after self-reaction, introducing high-purity fluorine-nitrogen mixed gas to carry out fluoridation reaction, and extracting impurities generated by the reaction to obtain unstable soluble polytetrafluoroethylene resin with a treated terminal group; according to the method, soluble polytetrafluoroethylene resin is heated to a molten state, and unstable terminal groups are thoroughly treated through self-reaction and fluorination reaction.

Systems and methods for producing hydrogen, or gaseous mixtures containing a substantial proportion of hydrogen, by electrical pyrolysis of hydrocarbons, and, more particularly, electrical pyrolysis of methane to produce hydrogen or gaseous mixtures containing a substantial proportion of hydrogen via the use of joule heating of powders and gases. The systems and methods utilize joule heating of powders and gases to enable thermal decomposition of the gases in a volume of electrically conductive powder that is confined inside a joule heated reactor. The systems and methods can be used in the thermal decomposition of methane gas into at least hydrogen gas and carbon inside a reactor, wherein the methane is infused within a volume of gas permeable electrically conductive powder and the heat for the thermal decomposition is provided by joule heating the powder.

The invention relates to the technical field of cable adhesive production, and particularly discloses a reaction kettle for cable adhesive production, which comprises a kettle body and a stirring mechanism, the stirring mechanism comprises a stirring rod and a stirring blade, the stirring rod is rotatably arranged in the kettle body, the stirring blade is connected to the stirring rod, the stirring rod can rotate, and the reaction kettle also comprises an apportionment mechanism, the apportioning mechanism comprises a lifting part and an apportioning part, the lifting part comprises a mounting cylinder, a rotating cylinder and a spiral blade, the mounting cylinder is connected to the kettle body, the rotating cylinder is connected to the stirring rod, the spiral blade is connected to the stirring rod, the apportioning part is mounted on the mounting cylinder, the spiral blade is located in the mounting cylinder, and the mounting cylinder can extend into the upper-layer cable glue; the stirring rod rotates to drive the spiral blade to rotate, so that the spiral blade lifts the cable adhesive upwards and conveys the cable adhesive to the allocation part for allocation; according to the reaction kettle for cable adhesive production, cable adhesive can be conveyed to the allocation part and is allocated, and the speed of eliminating bubbles in the cable adhesive is increased.

An object is to provide a drying method for continuous processing under reduced pressure, which affords high drying efficiency by bringing about an ideal fluidized state of a process product, the method including, with a median diameter (D50) of a granular starting material ranging from 1 µm to 1000 µm and under reduced pressure at an absolute pressure of 4 to 30, performing a drying treatment by fluidizing the granular starting material, through heating with a heating medium at a temperature 15 to 120°C higher than the boiling point of a solvent in the granular starting material under the above reduced pressure.

The present invention discloses a reaction device and method for narrow-band luminescent indium phosphide quantum dots. The reaction device comprises a hypergravity device and a photothermal device. The hypergravity device comprises a housing, a motor, a turntable, a shear filler, a liquid distributor, a reaction chamber, a filler cover, a gas outlet, a liquid outlet, and a liquid inlet. The photothermal device comprises a laser heating device, a circuit and a water cooling device, a reflective layer, and a laser controller. The present invention couples an infrared laser into a hypergravity reactor, utilizes a solvent medium such as water or organic matter to absorb the infrared light and convert it into heat energy to increase its temperature, stimulates the nucleation reaction of a reactant precursor in a "micro-droplet reactor", realizes the controllable growth of quantum dots in the micro-droplet reactor, and finally obtains nanoparticles of uniform size by controlling the laser irradiation and heating time.

The invention relates to a salification-polymerization integrated production device and a production method of bio-based nylon 56. The device comprises a salification tank, an additive storage tank, a reaction kettle, a vacuum system, a granulator, a drying device and a control system. The control system of the method adopts a PLC (Programmable Logic Controller), the control systems of all main devices are mutually independent and have certain relation, all the devices are divided into different process stages according to different functions in the implementation process, and when the conditions meet the pre-designed process conditions, the system can automatically enter the next process stage without manual intervention. According to the present invention, the bio-based nylon 56 salt solutions with different pH values and different concentrations can be blended, and the blended raw materials are subjected to concentration, polymerization, granulation and drying so as to obtain the integrated polymerization method, such that the time is saved for the subsequent production, the production efficiency is improved, the environmental protection is provided, and the good market prospect and the good development space are provided for the prior art.

A production apparatus for cyclic esters, the production apparatus comprising: a barrel (10), which comprises a material chamber (101), and a feed inlet, a melt outlet (112) and at least one vacuum vent that are in communication with the material chamber (101); a hollow shaft (20) passing through the barrel (10) along a material feeding direction, wherein the hollow shaft (20) is provided with a medium chamber (201) therein; and several hollow disks (30) disposed in the barrel (10) along the feeding direction, wherein the hollow disks (30) are disposed on the outer periphery of the hollow shaft (20); and a medium flow channel (301) in communication with the medium chamber (201) is provided in each hollow disk (30), at least part of the medium flow channel (301) being a spiral from the outside to the inside, and / or the medium flow channel (301) comprising a plurality of parallel medium sub-channels (305). After entering the medium chamber (201), a heat medium flows into the medium flow channels (301) and is uniformly distributed within the hollow disks (30) via the medium flow channels (301). The hollow shaft (20) and the hollow disks (30) cooperate with each other to uniformly heat oligomers in the material chamber (101), thereby avoiding carbonization and coking caused by the non-uniform heating of the oligomers.

A system and method of preventing reverse migration of contaminant molecules includes an enclosure and a quantity of metal materials included within the enclosure. The quantity of metal materials includes multiple metal material surfaces. The metal material surfaces are conditioned to be attractive to at least a first portion of contaminant molecules. The first portion of contaminant molecules are adsorbed on the multiple metal material surfaces. The enclosure can be a canister with UHP gas flowing from an inlet to an outlet and the first portion of contaminant molecules randomly pass through the canister outlet into the canister.

The invention discloses a device and a method for generating hydroxyacetonitrile through reaction of gas-phase hydrocyanic acid. The device comprises a hydroxylation reaction tower I and a hydroxylation reaction tower II. Gas-phase hydrocyanic acid enters the first hydroxylation reaction tower from a tower kettle inlet of the first hydroxylation reaction tower to react with a formaldehyde solution, and the proportion, temperature and pH of raw materials and the retention time of the materials in the glycolonitrile reaction kettle are controlled; unreacted gas-phase hydrocyanic acid is conveyed to a tower kettle gas-phase inlet of the second hydroxylation reaction tower from a tower top gas-phase outlet of the second hydroxylation reaction tower to continuously react with fresh formaldehyde, and completely reacted glycolonitrile tower kettle liquid is conveyed to the first hydroxylation reaction tower. According to the invention, gas-phase hydrocyanic acid is directly reacted with formaldehyde, the conditions of the reaction process are controlled, the reaction rate is accelerated, the residence time of tower bottoms is prolonged, meanwhile, the emission of cyanogen-containing waste gas is reduced, the utilization rate of raw materials and the production safety are improved, and the purpose of continuously producing formaldehyde with the content of 1t is achieved; the content of the hydrocyanic acid is less than or equal to 1%.

The invention belongs to the technical field of polydextrose preparation, and relates to a polydextrose continuous polymerization production system and a method thereof. The system comprises a pre-polymerization tank and at least three polymerization tanks which are sequentially communicated through pipelines, the pre-polymerization tank pretreats a mixed solution to be polymerized entering through a feeding pipe, the mixed solution pretreated by the pre-polymerization tank is subjected to continuous polymerization reaction in the polymerization tanks, and polydextrose generated by the polymerization reaction is input to the next procedure through a liquid outlet pipe; a liquid level meter is arranged on the pre-polymerization tank, a liquid conveying pump is arranged on the liquid conveying pipe, a pneumatic control valve is arranged on a high-temperature heat conduction oil inlet pipeline of each polymerization tank, and a thermometer is arranged on each polymerization tank; the frequency of the infusion pump is in signal linkage with the liquid level meter so as to adjust the infusion flow of the infusion pipe, and the pneumatic control valve of each polymerization tank is in signal linkage with the thermometer so as to adjust the polymerization temperature in the tank. The automatic continuous polymerization production of polydextrose is realized, the labor cost is saved, and the production operation is stable.

The invention relates to a reaction device for preparing a magnesium hydroxide flame retardant based on a gas phase method and a preparation method thereof, and belongs to the technical field of chemical engineering equipment and inorganic non-metallic material preparation. The reaction device comprises a precursor precise conveying system, a multi-temperature-zone laminar flow reaction system, an efficient particle collecting system and a central process control system. According to the method, a magnesium source precursor gas-phase flow, a hydrolytic agent gas-phase flow and a surface modifier gas-phase flow are respectively provided by the precursor precision conveying system, are introduced into the multi-temperature-zone laminar flow reaction system through the three coaxial laminar flow nozzles, and are sequentially subjected to controlled mixing in the preheating mixing zone. The whole process is carried out in a gas-phase low-pressure laminar flow environment, hard agglomeration of particles is effectively avoided, the prepared magnesium hydroxide flame retardant has the advantages of being uniform in primary particle size, good in dispersity and high in surface organification degree, and the compatibility and flame retardant efficiency of the magnesium hydroxide flame retardant in a polymer matrix are remarkably improved.

The invention discloses an energy-saving and consumption-reducing system and method based on an alkoxylation device.The system comprises a pretreatment kettle, the discharging end of the bottom of the pretreatment kettle is communicated with the top of the pretreatment kettle sequentially through a pretreatment kettle outer circulating pump and a pretreatment kettle outer circulating heater, and the discharging end of the pretreatment kettle outer circulating pump is further communicated with a reaction kettle; the bottom discharge end of the reaction kettle is sequentially communicated with a reaction kettle circulating pump and a reaction kettle circulating heat exchanger, the discharge end of the reaction kettle circulating heat exchanger is respectively communicated with the reaction kettle and a gas-liquid mixer, and the discharge end of the reaction kettle circulating heat exchanger is also communicated with a reaction heat recovery system; the discharging end of the reaction kettle circulating pump is also communicated with the feeding end of a post-treatment kettle, and the bottom of the post-treatment kettle is provided with a discharging end; the method comprises the steps of pretreatment, alkylation reaction, aftertreatment and tail gas washing. According to the scheme, the energy-saving and consumption-reducing effects are remarkable.

The invention discloses a portable flexible vacuumizing and inert gas mixture filling device, and relates to the technical field of catalyst preparation, the portable flexible vacuumizing and inert gas mixture filling device comprises a vacuum box, an air extractor and an inert gas generator, the air exhauster and the inert gas generator are connected with the vacuum box through pipelines. Through mutual cooperation of the vacuum box, the air extractor and the inert gas generator, the vacuum box is vacuumized through the air extractor, then the vacuum box is filled with inert gas generated by the inert gas generator all the time, and it is ensured that no oxygen is left in the vacuum box when a conductive carrier such as foamed nickel or carbon cloth passes through the vacuum box; the problem that oxygen participates in the catalyst heating process in the electrode production process of an existing water electrolyzer, and the quality of an electrode product is affected is effectively solved.

The invention discloses a multifunctional vacuum material neutralization tank which comprises a tank body, a spherical seal head is arranged at the bottom end of the tank body, and a downward discharge hole is formed in the center of the spherical seal head; the stirring device comprises a driving motor, a stirring shaft and a stirring paddle mounted on the stirring shaft, the stirring shaft is transversely mounted in the tank body through a sealing assembly, the driving motor is mounted on one side of the tank body and is in driving connection with the stirring shaft through a reduction gear set, and the stirring paddle is mounted on the stirring shaft in the tank body. The stirring paddles are arranged along the circumferential direction of the stirring shaft and are in arc-shaped fit with the inner wall of the spherical sealing head; the spraying device is arranged in the tank body, is positioned above the stirring device, and comprises a plurality of nozzles which are arranged in rows and are provided with downward spouts; the cleaning device is arranged at the top of the inner cavity of the tank body and comprises a rotary cleaning ball head. The vacuum tank has the beneficial effects that the environment in the tank can reach a more ideal vacuum state and a more ideal sealing effect; and the materials are prevented from blocking the discharging hole, and the tank body can be automatically cleaned.

The application discloses a single-component organic silicon sealant for solar photovoltaic modules and a preparation method thereof, and relates to the technical field of high polymer materials. The single-component organic silicon sealant for solar photovoltaic modules is prepared by mixing 107 silicon oil, reinforcing fillers, a silane coupling agent, a catalyst and a cross-linking agent. The preparation method of the single-component organic silicon sealant for solar photovoltaic modules is realized by a preparation device of the single-component organic silicon sealant for solar photovoltaic modules. The preparation device of the single-component organic silicon sealant for solar photovoltaic modules comprises a reaction kettle. The application can form a continuously shrinking closed space in the reaction kettle, thereby shortening the time required for vacuumizing treatment. Nitrogen can be input into the material from the lower part of the material, thereby effectively improving the heat exchange area of nitrogen and the material, improving the material cooling speed, and thereby obviously improving the preparation efficiency of 107 silicon oil.

The invention discloses an ammonia reaction control method and system for a vacuum pushed slab kiln, and belongs to the technical field of special furnaces for chemical engineering, and the method is characterized by comprising the following steps: acquiring sensor data at the current moment; the push plate offset and the material offset are obtained according to the sensor data; according to the push plate offset and the material offset, the residual reaction amount of the current functional area is obtained; the concentration of at least one ventilation pipe in the current functional area is adjusted according to the residual reaction amount, the vacuum pushed slab kiln comprises a plurality of functional areas, each functional area comprises a plurality of ventilation pipes, and all the ventilation pipes are connected with gas storage tanks with different concentrations. The offset of the material is obtained, and the ammonia concentration is adjusted according to the offset of the material, so that the reaction quality of the material is ensured, the loss of the material in the preparation process is reduced, and the production resources and the production time are saved.

The present application belongs to the technical field of industrial control, and discloses a material dissolving reaction monitoring method, a monitoring device and a material dissolving reaction system. The material dissolving reaction monitoring method comprises the following steps: based on a reaction equation, calculating a first gas mass of a gas generated in a dissolving reaction according to the mass of all materials; making the environment in a dissolving tank reach a target environment; in the dissolving reaction, when a preset condition is met, making the vacuum degree in the dissolving tank and the vacuum degree in the dissolving tank before the dissolving reaction be the same, calculating the difference between a first mass before the dissolving reaction and a second mass in the dissolving reaction to obtain a second gas mass, the first mass and the second mass being the sum of the mass of the dissolving tank, a first reaction material and a second reaction material, when the difference between the first gas mass and the second gas mass is less than or equal to a preset threshold, determining that the dissolving reaction is completed, otherwise, determining that the dissolving reaction is not completed. The present application can effectively determine whether the dissolving reaction is completed.

The invention provides a device and a method for producing olefin through negative pressure driven catalysis of alkane dehydrogenation. A reaction unit comprises a pre-lifting zone, an oil agent contact zone, a reaction zone, a product quenching zone, a reaction outlet zone, an oil agent separation zone and a steam stripping zone; the device further comprises a negative pressure driving device, a spent catalyst receiver and a regenerant receiver; an oil-gas outlet of the oil-agent separation zone is communicated with an oil-gas inlet of the negative pressure driving device, and a catalyst outlet of the oil-agent separation zone is communicated with a catalyst inlet of the steam stripping zone; a catalyst outlet of the steam stripping area is communicated with a catalyst inlet of a spent catalyst receiver, and a catalyst outlet of the spent catalyst receiver is communicated with a spent catalyst inlet of the regeneration unit; a regenerated catalyst outlet of the regeneration unit is communicated with a catalyst inlet of a regenerant receiver, and a catalyst outlet of the regenerant receiver is communicated with a catalyst inlet of the oil agent contact area. The alkane dehydrogenation reaction can be carried out under negative pressure, the safety is good, and the alkane conversion rate and the olefin selectivity are high.

The invention relates to the technical field of solid waste resource utilization and adsorption material preparation, in particular to a process system for subcritical hydrothermal preparation of an activated carbon-zeolite composite molecular sieve from fly ash. The process system comprises a raw material pretreatment unit, a homogenizing and blending unit, a pressurization and heat compensation device, a subcritical hydrothermal reaction device, a heat recovery and pressure regulation device, a pressure self-driven separation device, a purification and drying device, an inorganic salt separation device and a wastewater neutralization unit. The fly ash is used as a raw material, the subcritical hydrothermal reaction device is combined with the characteristics of subcritical water and the synergistic effect of an oxidizing agent, conversion of silicon-aluminum components in the fly ash into zeolite and in-situ activation of carbon residues into activated carbon are synchronously achieved, and the problems that in the technology for preparing the zeolite molecular sieve from the fly ash, carbon residue resources are wasted, the waste liquid generation amount is large, and the cost is low are solved. The treatment cost is high; and the reaction energy consumption is high.

The invention relates to the technical field of high-valued utilization of biomass, in particular to a method for efficiently extracting levodextran from wood fiber biomass, which is characterized in that water is used as a reaction medium for hydrothermal pretreatment of biomass, hemicellulose and lignin are selectively removed under a subcritical condition, and the content of cellulose is increased by 1.5-2.0 times. Aiming at the pretreated cellulose-rich biomass, a'reduced-pressure thermal cracking-volatile component rapid cooling 'synergistic pyrolysis system is constructed, and secondary cracking of volatile components and generation of carbon deposit are inhibited through dual effects of accelerating escape of pyrolysis volatile components in vacuum and rapidly cooling the volatile components. By means of the synergistic mechanism, the yield of the levodextran breaks through 400 mg / g, and the selectivity is not lower than 62%. According to the method disclosed by the invention, water is taken as a reaction medium, the core bottlenecks of high biomass refining cost and poor target product selectivity are solved through a synergistic path of directional enrichment of pretreatment and precise regulation and control of a pyrolysis process, and an efficient and environment-friendly technical scheme is provided for industrial production of the L-glucan.

The invention provides a rice bran oil deodorization process for controlling the generation of glycidyl ester, which comprises the following unconventional steps: composite chelation pretreatment before deodorization, gradient variable pressure treatment in the deodorization process, low-temperature plasma post-treatment after deodorization and the like, and collaborative optimization of parameters such as temperature, time, vacuum degree and the like. GEs generation in the rice bran oil deodorization process can be remarkably inhibited, the GEs content in the deodorized rice bran oil is controlled to be 0.5 mg / kg or below, and meanwhile the flavor and oxidation stability of the rice bran oil are guaranteed. The method is simple in process operation, high in controllability and suitable for industrial production and application.

Disclosed in the present application are a single-walled carbon nanotube continuous production apparatus and production method. The production apparatus comprises a vacuum-tight box and a high-temperature growth furnace; a conveying device is provided in the vacuum-tight box, a growth substrate being placed on the conveying device; a sample feeding cylinder corresponding to the conveying device is provided in the vacuum-tight box; the vacuum-tight box is connected to a first vacuum pump; a growth quartz tube is provided in the high-temperature growth furnace, the growth quartz tube being connected to an outlet of the vacuum-tight box; the growth quartz tube is further connected to a carbon source supply system and a second vacuum pump; the production apparatus further comprises a sample acquiring cylinder and a cooling quartz tube, the cooling quartz tube being connected to the growth quartz tube; the sample acquiring cylinder is used for discharging out of the high-temperature growth furnace the growth substrate loaded with a single-walled carbon nanotube, and then feeding into the cooling quartz tube said growth substrate to be cooled. The production apparatus and the production method not only can produce and obtain relatively pure and uniform single-walled carbon nanotubes, but also exhibit a high degree of automation and high production efficiency, and can achieve the continuous production of the single-walled carbon nanotubes.

A reactor for coating particles includes one or more motors, a rotary vacuum chamber configured to hold particles to be coated, wherein the rotary vacuum chamber is coupled to the motors, a controller configured to cause the motors to rotate the rotary vacuum chamber about an axial axis of the rotary vacuum chamber such that the particles undergo tumbling agitation, a vacuum port to exhaust gas from the rotary vacuum chamber, a paddle assembly including a rotatable drive shaft extending through the rotary vacuum chamber and coupled to the motors and at least one paddle extending radially from the drive shaft, such that rotation of the drive shaft by the motors orbits the paddle about the drive shaft in a second direction, and a chemical delivery system including a gas outlet on the paddle configured inject process gas into the particles.

The invention discloses a granulation method for rare earth halide crystal powder. A used granulation device comprises vacuum equipment, granulation equipment and drying equipment, comprising the following steps: vacuumizing the interior of a vacuum cavity; the rare earth halide crystal powder is conveyed into granulation equipment, after being stirred by a stirring device for 10-30 min, the rare earth halide crystal powder enters a gap between a first extrusion roller and a second extrusion roller, the pressure applied to the rare earth halide crystal powder by the first extrusion roller and the second extrusion roller is 70-180 kN, and a rare earth halide crystal particle precursor is formed; and drying the rare earth halide crystal particle precursor in drying equipment at 120-300 DEG C to obtain the rare earth halide crystal particles. According to the granulation method, the rare earth halide powder can be prevented from absorbing water in the granulation process, so that the rare earth halide particles with low water content are obtained.

The invention discloses a chain type scraper film reaction device for a sulfur-containing silane coupling agent and a method for producing the sulfur-containing silane coupling agent by adopting the chain type scraper film reaction device. Comprising a scraper film reactor, a horizontal screw centrifuge, a mixing kettle, a slurry pump, a chloropropyltriethoxysilane metering tank, an anhydrous sodium polysulfide powder tank, a condenser, a receiving tank, a Roots vacuum unit, a pipeline pump, a precision filter and a finished product tank. A discharge hole is formed in the lower part of the mixing kettle and is connected with an inlet of the slurry pump; the chained scraper film reactor is provided with a feeding hole A and a feeding hole B which are symmetrically distributed; and a chain-type scraper is arranged in the chain-type scraper film reactor. According to the invention, a suspension of chloropropyltriethoxysilane and anhydrous sodium polysulfide can enter the symmetrically distributed feed ports of the reactor through the slurry pump, and is pumped into the scraper film reactor at a certain flow rate, and a uniform film is formed through the chain type rotary scraper for reaction, so that the reaction device has efficient mass and heat transfer effects and uniform temperature distribution.

The application discloses an ozone method for preparing glyoxylic acid monohydrate distillation reaction control method, including the following steps: step S1, the glyoxylic acid-formic acid mixed solution obtained by oxidation reaction is introduced into the distillation kettle; step S2, the heat exchange jacket and heat exchange coil in the distillation kettle are passed through 80 DEG C hot water; step S3, the vacuum is opened, and the inside of the distillation kettle is subjected to vacuum distillation; step S4, the vacuum degree, temperature and material density in the reaction kettle are monitored; step S5, the distillation reaction endpoint is judged by the change trend of the material temperature, vacuum degree and density in the kettle; step S6, the finished product after distillation is discharged into the glyoxylic acid storage tank, and the formic acid solution evaporated and condensed is discharged into the receiving tank. The application controls the parameters of the distillation process accurately, stops the distillation of the material immediately when the reaction reaches the endpoint, guarantees that the glyoxylic acid monohydrate product reaches the accurate water content ratio, and prevents water from being over-steamed, so that the product cost is prevented from being increased.