22results about How to "Control reaction temperature" patented technology

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method of active end group polyarylether sulfone. The preparation method of the active end group polyarylether sulfone comprises the following steps: mixing a dihalogenated aromatic sulfone monomer, an alkaline reagent and an aprotic polar solvent, adding an aromatic dihydroxyl monomer in batches for polymerization reaction, and desalting to obtain a polyarylether sulfone system; the temperature of the polymerization reaction is 120 to 240 DEG C; the number of times of adding the aromatic dihydroxyl monomer to carry out the polymerization reaction is more than three; and mixing the polyarylether sulfone system with an end-capping reagent, and carrying out an end-capping reaction to obtain the polyarylether sulfone. According to the preparation method of the polyarylether sulfone provided by the invention, through fine synthesis of step-by-step polymerization, reaction temperature control, effective control of reaction rate and inhibition of hydrolysis rate of raw materials, the obtained polyarylether sulfone is high in purity, proper in active end group content and good in solution color and luster, and has a better toughening effect when being combined with epoxy resin.

The invention belongs to the technical field of micro-reaction, and particularly relates to a micro-mixer and a method for continuously preparing nano cooling liquid. Comprising a reaction cavity in which a plurality of reaction flow channels are arranged, all the reaction flow channels are used for preparing nano cooling liquid and are vertically arranged in the reaction cavity in a three-dimensional spiral shape, and each reaction flow channel is internally provided with a plurality of disturbance structures and a plurality of distributors which are arranged in the reaction cavity and located above all the reaction flow channels, each distributor is connected with the inlets of all the reaction flow channels, the collectors are arranged at the outlets of all the reaction flow channels, and pressure regulating structures are arranged in the collectors. According to the invention, the distributor is adopted to enable the reaction fluid to flow into the corresponding reaction flow channel, the three-dimensional spiral flow channel design in the reaction cavity is folded in space, so that the overall size of the microreactor is not too large, and a disturbance structure is arranged in each reaction flow channel, so that the mixing efficiency can be further improved; the production rate of the microreactor is improved, and blockage in a flow channel is avoided.

The invention provides a method for preparing bisphenol nitro compounds by using a continuous tank reactor, and belongs to the field of continuous flow reaction. According to the method for preparing the bisphenol nitro compound by utilizing the continuous tank reactor, the bisphenol compound is used as a raw material, and the bisphenol compound and nitric acid are subjected to nitration reaction by utilizing the continuous tank reactor to prepare the bisphenol nitro compound. The nitration reaction can be realized with high efficiency and high selectivity, the reaction temperature can be effectively controlled, and the safety of the reaction is further ensured.

The invention discloses a preparation method of stable nano platinum sol, which comprises the following steps: mixing a potassium chloroplatinate solution and a stabilizer solution according to a certain proportion to obtain a mixed solution A; adding a reducing agent solution into the obtained mixed solution A to obtain a mixed solution B, and carrying out a reduction reaction; after the reaction is finished, nano platinum sol is obtained, the obtained nano platinum sol is preserved, and the particle size, the particle size range, the morphology, the dispersity and the stability of the nano platinum sol are regulated and controlled by selecting different types of reducing agents and controlling the reaction temperature and the reaction time; the nano platinum sol is prepared through a chemical method, the preparation method is simple, and large-scale industrial production is easy.

The invention discloses a method and a device for treating supersaturated wastewater containing chlorobenzene organic matters, and belongs to the technical field of high-concentration organic wastewater treatment. According to the technical scheme, the method for treating the supersaturated wastewater containing the chlorobenzene organic matters comprises the following steps: 1) separating and dissolving undissolved chlorobenzene; 2) oxidizing chlorobenzene and regenerating filler; 3) thoroughly oxidizing chlorobenzene and intermediate products thereof; (4) flocculating settling; the device comprises a first-stage reaction tower, a second-stage reaction kettle and a flocculation sedimentation tank which are sequentially connected through pipelines, the first-stage reaction tower is provided with a wastewater inlet pipeline and a first-stage reaction tower water outlet pipeline, and the first-stage reaction tower water outlet pipeline is provided with an acid liquor feeding pipeline, an oxidizing agent I or catalyst feeding pipeline and a first-stage UV reactor; and a second-stage UV reactor is arranged on a pipeline between the first-stage reaction tower and the second-stage reaction kettle. The method is suitable for treatment processes of high-concentration / supersaturated chlorobenzene-containing organic matter wastewater and high-concentration / supersaturated chlorobenzene-containing organic matter wastewater.

The invention discloses a production system and a production method of a polyethylene wire drawing material. The production system comprises a feeding unit, a polymerization unit and a powder treatment unit, the polymerization unit comprises a stirred tank reactor; a discharge port of the stirred tank reactor is sequentially connected with the external circulation cooler and the circulation feed port through the circulation pump to form a first circulation pipeline; the discharge end of the circulating pump is also connected with a sampling branch; the powder treatment unit comprises a solid-liquid separator, a hexane refining unit and an extrusion granulation unit; a feed port of the solid-liquid separator is communicated with a discharge end of the circulating pump through a sampling branch, a liquid phase outlet of the solid-liquid separator is divided into a first passage and a second passage, and the liquid phase outlet is connected to the stirred tank reactor through the first passage to form a second circulating pipeline; the third circulating pipeline is formed by sequentially connecting the third circulating pipeline to the hexane refining unit and the stirred tank reactor through a second passage; the extrusion granulation unit comprises a mixer and an extruder which are connected in sequence, and a feed port of the mixer is communicated with a solid-phase outlet of the solid-liquid separator.

The invention relates to the technical field of industrial preparation of hydroxypivalaldehyde, in particular to a hydroxypivalaldehyde preparation device and a preparation method thereof.The hydroxypivalaldehyde preparation device comprises a premixer, a tower reactor and a forced circulation pump, and a first reaction zone and a second reaction zone are arranged in the tower reactor and communicated through a plurality of downcomer distribution pipes; a discharge port at the bottom of the tower reactor is respectively connected with a discharge pipeline and a circulating pipeline I, the forced circulating pump is arranged on the circulating pipeline I, the circulating pipeline I is communicated with the plurality of nozzles, the circulating pipeline I is connected with a circulating pipeline II in parallel, and the circulating pipeline II is communicated with the circulating material inlet. According to the present invention, the mixing efficiency of the raw material and the catalyst can be substantially improved, the layering of the material is effectively avoided, the reaction time is ensured, the reaction circulation amount entering the second reaction zone and the first reaction zone is adjusted, the retention time and the reaction temperature of the circulation liquid in the reactor are controlled, the side reaction is reduced, and the HPA yield is improved.

The utility model relates to mechanical equipment technical field, concretely relates to a mobile multifunctional cleaning car, including the bearing platform, the bearing platform top is provided with reagent tank, reagent tank bottom outlet is connected with circulating pump, and the circulating pump output is connected with heating / cooler through pipeline, and heating / cooler fluid outlet is connected with the switching valve group for changing reagent flow direction, the switching valve group links respectively with reboiler and reagent tank, the water seal tank group is connected with tail gas recovery unit through pipeline at reagent tank top tail gas outlet, the utility model discloses through switching valve group changes reagent flow direction, supports'high in -low out'and'low in -high out'two modes, effectively removes the compact scale layer between the shell -side inner wall and the tube bundle of reboiler, promotes the thoroughness of cleaning, solves the pain point that traditional one -way cleaning is easy to leave dead angle.

The invention provides an efficient pe reaction kettle and a control method thereof, and belongs to the technical field of reaction kettles.The efficient pe reaction kettle comprises a reaction kettle body, an annular plate, a smashing box, a grinding box, a supporting seat, a sealing block, a vertical moving mechanism, a driving mechanism, a transmission mechanism, a locking mechanism and a stirring mechanism, and smashing rollers and grinding rollers are arranged in the smashing box and the grinding box respectively; rotation is achieved through the driving mechanism, smashing and grinding are achieved through the transmission mechanism, fixing is achieved through the locking mechanism, and mixing and stirring are conducted through the stirring mechanism. The control method comprises the steps of feeding, crushing, grinding, sealing and the like. The device solves the problems of easy loss and low efficiency in collection and transfer during raw material treatment in the prior art, has the beneficial effects of reducing raw material loss, improving the working efficiency, ensuring the reaction quality, being convenient to operate and the like, can effectively control the reaction temperature and fully stir the raw materials, and is suitable for PE reaction.

The utility model relates to the technical field of heat exchangers, in particular to a multistage hydrogenation circulation heat exchanger system which comprises a heat exchanger body used for heat recovery, flow guide openings used for gas circulation are formed in the end faces of the heat exchanger body respectively, a back plate is fixedly connected to the heat exchanger body, and a heat exchange mechanism used for heat exchange is arranged on the back plate. A transmission mechanism used for adjusting the medium circulation speed is further arranged on the back plate, the heat exchange mechanism comprises a plurality of cavities formed in the heat exchanger body, a plurality of pump bodies are fixedly installed on the back plate, and valves are fixedly installed on the flow guide pipes a. The flow velocity of a medium can be adjusted, so that temperature control, energy utilization efficiency improvement, reaction temperature control and equipment size reduction in a multi-stage hydrogenation circulating heat exchanger system can be realized, process optimization and economical efficiency improvement are realized, in addition, the mechanism is simple in structure, convenient to operate and capable of realizing automatic control, and the production cost is reduced. The production efficiency and the stability are improved.

This utility model discloses a graphite tube reactor, relating to the technical field of graphite tube reactors. It includes a counterweight base and a vertical plate welded to the top outer wall of the counterweight base. An angle adjustment seat is hinged to the upper part of the vertical plate, and the graphite tube reactor body is mounted on the angle adjustment seat. Two hydraulic cylinders are symmetrically hinged between the vertical plate and the angle adjustment seat. The graphite tube reactor body is equipped with a temperature-controlled stirring mechanism, which includes a T-shaped motor base, a temperature sensor, a cooling stirring component, and a heating stirring component. This utility model features a temperature-controlled stirring mechanism, which can intelligently and precisely control the reaction temperature inside the graphite tube reactor, thus improving the reaction efficiency. The control panel allows for simultaneous operation of the two hydraulic cylinders to flexibly adjust the tilt angle of the graphite tube reactor body, better meeting the needs of different applications.

The utility model discloses a chemical stirring device with an efficient cooling function, and relates to the technical field of chemical equipment. The stirring device comprises a stirring barrel, a stirring assembly and a heat exchange pipe fitting, a stirring assembly is arranged in the stirring barrel, and the upper part of the stirring assembly is fixed on the barrel cover; the multiple heat exchange pipe fittings are distributed in the stirring barrel at equal intervals, inlets of the multiple heat exchange pipe fittings are connected with an outlet of the refrigeration equipment through the cooling liquid input pipe fittings, and outlets of the multiple heat exchange pipe fittings are connected with an inlet of the refrigeration equipment through the cooling liquid output pipe fittings. According to the chemical stirring device, the heat exchange pipe fitting can swing in the stirring barrel and is matched with the stirring assembly, the overall stirring effect can be greatly improved, the position of the heat exchange pipe fitting in the stirring barrel is adjustable, the heat exchange pipe fitting can conduct heat exchange on materials at all positions in the stirring barrel, and the problems that an existing chemical stirring device is single in stirring mode, and the stirring efficiency is high are solved. The stirring effect is poor, and the cooling efficiency of internal materials is poor.

The invention relates to a method for recovering phosphorus from waste bones, and belongs to the technical field of phosphorus resource recovery. Leaching phosphorus in the waste bones: roasting the waste bones at high temperature, converting phosphorus in the bones into inorganic phosphorus, and then leaching the roasted bones by adopting a leaching agent to obtain a phosphorus-containing solution; leaching magnesium in the dolomite: leaching the magnesium in the dolomite by adopting a leaching agent, and carrying out solid-liquid separation to obtain a magnesium-containing solution and calcium sulfate precipitate; and synthesis of struvite: mixing the obtained phosphorus-containing solution and the obtained magnesium-containing solution to obtain a mixed solution, adding ammonia water, fully reacting, and filtering to obtain a filter residue which is the target product struvite. The method is simple in process and convenient to operate, phosphorus in the waste bones can be extracted and converted into relatively high-value struvite through a full-wet process, and a foundation is laid for recycling of the waste bones.

The production device comprises a primary impurity removal module, a phosphoric acid solution generation module, an arsenic removal module and a blending module which are connected in sequence, the primary impurity removal module comprises a yellow phosphorus tank, a primary filter and an impurity removal tank which are connected in sequence; the phosphoric acid solution generation module comprises a combustion tower; the arsenic removal module comprises an arsenic removal tank and an ultrafiltration system; the blending module comprises a phosphoric acid dilution tank; a secondary filter is arranged between the primary impurity removal module and the phosphoric acid solution generation module; a three-stage filter is arranged between the phosphoric acid solution generation module and the arsenic removal module; and the electronic-grade phosphoric acid is discharged through the four-stage filter. The device can effectively remove impurities of front-end raw materials, middle-end reaction liquid and rear-end products, and the yield of phosphoric acid reaches 95% or above.

This invention discloses a method for disrupting the cell walls of structurally heterogeneous microorganisms based on the synergistic vibration of multi-size media and its application. The method includes the following steps: (1) constructing a composite cell-dispersing media system with multi-size characteristics and filling it into a cell-dispersing tube; (2) injecting the microbial sample to be disrupted into the cell-dispersing tube and oscillating it at a linear velocity of 6-7 m / s for 30-90 seconds at 4-25 ℃; (3) after cell disruption, separating the mixed composite cell-dispersing media system and the solution to obtain a cell-dispersed solution containing intracellular products. The beneficial effects of this invention are: through the synergistic effect of multi-scale shear forces, it significantly improves the lysis efficiency of difficult-to-disrupt pathogens such as Mycobacterium tuberculosis, Cryptococcus, and Aspergillus, effectively protects the nucleic acid integrity of RNA viruses, has high cell disruption uniformity, good RNA protection, can be standardized and adapted to automated platforms, and is suitable for the pretreatment of complex clinical samples.

The invention discloses a crisaborole ointment and a production process thereof. The crisaborole ointment is prepared from crisaborole, white vaseline, liquid paraffin, glyceryl monostearate and glyceryl distearate, glycerol, propylene glycol, butylated hydroxytoluene, ethylenediamine tetraacetic acid disodium salt, dimethyl sulfoxide and benzalkonium chloride. The preparation method comprises the following steps: 1, synthesizing crisaborole; step 2, preparing an ointment matrix; step 3, preparing and mixing a solution; step 4, emulsifying and homogenizing; and step 5, filling and packaging. Step 6, quality control; the butylated hydroxytoluene is added as an antioxidant to effectively prevent the effective components in the ointment from being oxidized in the preparation and storage processes, and the ethylene diamine tetraacetic acid is added as a metal chelating agent to chelate metal ions, so that the potential adverse effects of the metal ions on the stability and curative effect of the ointment are effectively prevented, and the ointment is safe and reliable. The purity and the safety of the ointment are ensured, and the oxidation resistance and the metal ion interference resistance of the ointment are enhanced.

The present invention provides a Ni-doped Ru hollow nanomaterial and its application in electrocatalytic hydrogen evolution. The present invention has a simple process flow and low cost. The Ni-doped Ru hollow nanoparticles prepared by the present invention have excellent electrocatalytic water decomposition hydrogen performance under both acidic and alkaline conditions. Its electrocatalytic hydrogen evolution performance under alkaline conditions is better than that of the Pt catalyst with the best electrocatalytic hydrogen evolution performance at present, and its stability is very excellent; and its electrocatalytic performance under acidic conditions is also close to that of the Pt catalyst, and metal Ru is cheaper than Pt, so it has good application prospects in electrocatalytic water decomposition hydrogen.

The present invention belongs to the technical field of chemical equipment, and specifically relates to a system for PVC material polymerization. The system for PVC material polymerization includes a reactor for polymerization reaction, the reactor includes a reactor body, an upper cover with a feed pipe is installed on the reactor body, and a discharge pipe is installed at the lower end of the reactor body; a spiral stirring rod is rotatably installed on the upper cover, a motor is installed on the upper cover and drives the spiral stirring rod, and the spiral stirring rod is in a spiral shape; a rotary joint is installed at the upper end of the spiral stirring rod, and a liquid inlet pipe and a liquid outlet pipe are connected to the rotary joint, and a liquid inlet cavity and a liquid outlet cavity are opened in the spiral stirring rod, and the liquid inlet cavity and the liquid outlet cavity are connected to each other at the end of the spiral stirring rod away from the motor; the present invention has a simple structure, can effectively improve the heat exchange effect of the reactor, and avoid PVC accumulation and agglomeration, and is convenient for cleaning the reactor.

The invention discloses fermentation equipment for methyl propionate preparation, and relates to the technical field of methyl propionate preparation, the fermentation equipment comprises a fermentation reaction device, the fermentation reaction device comprises a support frame, a tank body, a shell, a first electric heater and a discharge pipe, the shell is internally provided with a resistance wire spiral pipe, and the resistance wire spiral pipe is internally provided with a second electric heater; the bottom end of the shell and the top end of a first electric heater are fixedly installed. The electric heater I and the auxiliary heating device are combined, the electric heater I heats the resistance wire spiral pipe wound on the insulating shell on the outer side of the reaction kettle tank body, the reaction kettle tank body is heated, and meanwhile, a plurality of heating pipes and stirring plates rotate in the tank body at a constant speed; therefore, the effect that the solution in the tank body is uniformly heated while being stirred is achieved, reactants in the tank body can be uniformly heated, the reaction temperature of each reactant in the reaction kettle is uniformly controlled, and the preparation yield, the preparation purity and the preparation efficiency of methyl propionate are improved.

The utility model relates to the technical field of chemical synthesis, in particular to a chemical synthesis reaction kettle, which comprises a reaction kettle, a cooling device and a stirring device are arranged in the reaction kettle, the cooling device comprises a plurality of corrugated cooling pipes, crests or troughs of the plurality of cooling pipes form a plurality of coaxial circular rings, and the stirring device is arranged in the reaction kettle. The stirring device comprises a stirring shaft and a stirring unit, the stirring unit comprises a connecting rod and a stirring rod, and the connecting rod is connected with the stirring shaft. The cooling pipe is arranged in the reaction kettle and is corrugated, so that the contact surface between liquid and a cooling medium is increased, the heat exchange efficiency is improved, and meanwhile, the corrugated cooling pipe is beneficial to forming a plurality of coaxial annular solution rings, so that the stirring rod can rotate in the annular solution rings to stir. The stirring device is reasonable in design, the stirring efficiency of the stirring device is improved, raw materials are rapidly and uniformly mixed, meanwhile, the heat exchange efficiency of a solution is improved, and control over the reaction temperature is facilitated.

The utility model relates to the technical field of chemical experiments and discloses a chemical experiment reaction vessel. Comprising a box body, lifting grooves are formed in the two sides of the upper portion of the box body, a partition plate is fixedly installed in the middle of the interior of the box body, a through hole is formed in the center of the partition plate, sliding grooves are formed in the two sides of the partition plate, and a stirring assembly is fixedly installed on the upper portion of the interior of the box body; compared with the prior art, the reaction kettle has the advantages that through the design of the lifting groove and the sliding groove, the height of the stirring shaft can be conveniently adjusted, work cannot be hindered when chemical substances are added, reaction substances can be effectively separated through the partition plates, the stirring assembly can stir and mix the reaction substances, the reaction speed can be controlled, and the reaction kettle is convenient to use. And through the design of the heating frame and the heating plate, reaction substances can be heated, the reaction temperature is controlled, and the reaction is promoted.

The invention discloses a synthesis device and a synthesis method of allyl tertiary amine, and belongs to the field of fine chemical engineering. The synthesis device of the allyl tertiary amine comprises a dimethylamine raw material tank, a chloropropene raw material tank, a dimethylamine raw material pump, a chloropropene raw material pump, a microchannel reactor, an intermediate storage tank, a dimethyl allyl crude product tank and a pH control system, a discharge port of the dimethylamine raw material tank is connected with an inlet of the dimethylamine raw material pump, and an outlet of the dimethylamine raw material pump is connected with the micro-channel reactor; a discharge port of the chloropropene raw material tank is connected with an inlet of the chloropropene raw material pump, and an outlet of the chloropropene raw material pump is connected with the microchannel reactor; a discharge port of the micro-channel reactor is connected with an intermediate storage tank, the intermediate storage tank is connected with a dimethyl allyl crude product tank through a pipeline, and an upper organic phase is guided into the dimethyl allyl crude product tank; the pH control system is connected with the micro-channel reactor and is used for controlling the pH of a reaction system in the micro-channel reactor.