70results about "Process control/regulation" patented technology

A method is provided for manufacturing vinyl chloride monomer (VCM), the method comprises subjecting ethylene dichloride (EDC) to thermal cracking to yield a VCM-containing gaseous product, in which method an amount of thermal energy required to heat a stream of EDC-containing process fluid to temperature(s), at which cracking reactions occur, is produced and transferred to said EDC-containing process fluid using a rotary apparatus (100). A VCM production unit and use of the rotary apparatus in production of vinyl chloride monomer from EDC through therma cracking, are further provided.

The present application belongs to the technical field of chemical machinery, and specifically discloses a stirring reaction kettle and method for epoxy-based wood primer, which comprises a base, a heating mechanism, an adding mechanism and a kettle body. The kettle body is fixedly installed above the base and externally fixedly sleeved with a heat preservation jacket. The adding mechanism is arranged on one side inside the kettle body. A raw material adding pipe is communicatively installed on the side of the kettle body which is away from the adding mechanism. A rotating shaft is rotatably installed in the middle of the kettle body. The present application forms a multi-scale shear force field through the push-cut extrusion piece, realizes the full mixing of material molecules in scale, improves the completeness and uniformity of the reaction, and produces the primer with uniform crosslinking density and excellent comprehensive performance. The equipment is stable in operation and suitable for industrialized continuous production.

The present application relates to the technical field of silicon oxide preparation, and particularly relates to a reaction furnace equipment and method for continuously preparing lithium battery negative electrode material, which comprises the following steps: at least two groups of dust accumulators and material bins are connected with a main reaction furnace; materials are put into the main reaction furnace, the main reaction furnace is heated to a production temperature, one group of dust accumulators and material bins are opened, materials generated in the main reaction furnace can be continuously accumulated on material carriers of the dust accumulators, and a scraper mechanism is used to transport the generated materials from the dust accumulators to the material bins; when the dust accumulators or the material bins of the group reach saturation, another group of dust accumulators and material bins are opened to collect materials, the dust accumulators and the material bins of the group are closed, and are transferred to a cooling area; after cooling, the materials in the dust accumulators and the material bins are collected; at least two groups of dust accumulators and material bins are used for cyclic production, so that continuous production is realized, and production efficiency is improved.

A method can be employed to regulate and stably operate a steam reforming system that is operated by steam reforming, that has a capacity utilization level that can be regulated, and that comprises a steam reformer, a hydrogenating and desulfurizing unit that is positioned upstream of the steam reformer and is configured for feedstock desulfurization, and a firing unit of the steam reformer. According to the method, a mandated capacity utilization level for the steam reforming system is established with automated regulation of the following continuously monitored parameter ratios: a hydrogen-to-feedstock ratio in the hydrogenating and desulfurizing unit, a steam-to-carbon ratio in the steam reformer, and a fuel-to-air ratio in the firing unit of the steam reformer.

This invention discloses a resin heating and stirring device, belonging to the field of resin processing technology. It includes a reactor with a pushing assembly installed on the lower side inside. The pushing assembly includes a rotating rod rotatably installed inside the reactor. Multiple pushing frames are fixedly installed on the lower outer wall of the rotating rod. A transition groove is opened inside each pushing frame, and multiple feed inlets are opened on the outer wall of the pushing frame corresponding to the transition groove. A drive motor is installed at the upper end of the reactor. A piston groove is opened inside the rotating rod, and a piston plate is installed in the piston groove. This invention, by setting the pushing frames to fit against the inner wall of the reactor, can push the inner wall to adhere to the material as the rotating rod rotates, avoiding prolonged static contact between the material and the reactor wall, which can lead to sticking and yellowing. Simultaneously, by moving the piston plate up and down in conjunction with a first and second one-way valve, the material from the outer layer of the reactor can be transported to the inner layer, resulting in more thorough mixing and more uniform heating, thus ensuring the quality of resin preparation.

This invention discloses a method for controllable preparation of nanoparticles using a multi-channel microreactor. The method utilizes a microchannel reactor to segment droplets and prepare quantitatively synthesized nanoparticles with controllable particle size. The invention employs capillary action to draw the reaction solution into the microchannel, segmenting one or more droplets (each droplet into 10-100 portions). By changing the width of the microchannel, controllable preparation of nanoparticles within a small range (±3 nm) can be achieved; by changing the length of the microchannel, controllable preparation of nanoparticles within a large range (±10-30 nm) can be achieved. Furthermore, the reactor structure of this invention is simple, enabling highly precise and quantitative synthesis of various nanoparticles. Compared to large-scale reactors, the miniaturization of the synthesis reaction in this invention effectively reduces energy waste and safety hazards, making it highly valuable for applications in safe chemical engineering, green chemical engineering, high-efficiency chemical engineering, microchemical engineering, and precise reaction monitoring.

The application provides a synthesis method of hydroxyapatite with uniform and controllable size, wherein a calcium source reaction solution is mixed with a phosphorus source reaction solution, a reaction is carried out under stirring after pH adjustment, and a particle size adjusting agent and a charge interference agent are added after the reaction is completed, so that hydroxyapatite with controllable single crystal size and uniform particle size is obtained. The application has the beneficial effect that: hydroxyapatite is synthesized by using the reactor, the liquid flow rate and the rotation speed of the reactor have great influence on the formation of particles and the uniformity of particle size distribution, controllable single crystal size and uniform particle size of hydroxyapatite can be obtained by controlling parameters such as flow rate and rotation speed, and adding additives such as particle size adjusting agent and charge interference agent, and the back mixing process can promote the size uniformity of particles. In addition, the reactor is a large continuous reactor, which can continuously sample and obtain products at the same time, and has good effect on the preparation of large-scale hydroxyapatite with limited agglomeration.

A computer-implemented method is disclosed for determining at least one set of target parameters for a flow chemistry setup (110) for flow chemistry in a slug. This method is a self-learning method. The method includes the steps of: a) determining at least one process variable using at least one sensor (122) of the flow chemistry setup (110); b) training at least one machine learning model (126) based on the process variable; c) determining the target parameter set by applying an optimization algorithm for at least one optimization objective to the trained machine learning model (126); d) providing and / or considering the determined target parameter set for evaluating the flow chemistry setup (110) and / or evaluating at least one flow chemistry product.

The present application relates to water treatment and environmental protection engineering technical field, specifically to a kind of enhanced phosphorus removal COD water treatment reagent preparation system and method;It contains data acquisition, feature construction, model solution, cavitation modulation and feedback correction module;System collects inlet spectrum and constructs pollutant fingerprint characteristic vector;Its core is to use cavitation efficiency surface model, according to refractory index and colloid stability index to solve target cavitation number, regulate fluid dynamics parameters to exert variable frequency cavitation modulation on reagent, generate high-energy metastable reagent, and based on effluent Zeta potential correction model;The present application solves the contradiction between oxidation capacity and high molecular chain integrity by physically locking the optimal activation window, achieving the synergy of efficient COD degradation and excellent phosphorus removal flocculation capacity.

The embodiments may include an apparatus and a method for manufacturing a positive electrode active material precursor. An apparatus for manufacturing a positive electrode active material precursor according to one embodiment may include: a reaction unit (100) comprising a first reactor (110), an input pipe (120) configured to supply a raw material into the first reactor, and a first stirring means (130) located at the center inside the first reactor and configured to stir the raw material introduced from the input pipe to perform a coprecipitation reaction; a first connection pipe (300) through which a reaction product generated in the first reactor is discharged; a solid-liquid separation unit (200) comprising a second reactor (210), a second stirring means (230) located at the center inside the second reactor and configured to stir the reaction product introduced from the first connection pipe, and a filtrate discharge section (220) located at an upper portion of the second reactor; and a control unit connected to the reaction unit and the solid-liquid separation unit and configured to control the reaction unit and the solid-liquid separation unit to operate continuously.

A kind of electronic grade semiconductor stripping liquid purification method, comprising: providing electronic grade semiconductor stripping liquid residual liquid, and carry out pH detection, when pH<7, drop NaOH solution to stop;The residual liquid after neutralization is extracted into distillation kettle, and the aqueous solution of residual liquid is removed, and the water is collected into storage tank from the top of kettle, and the bottom of kettle is waste liquid containing salt, and salt is removed by cooling, crystallization, centrifugation, and the aqueous solution of electronic grade semiconductor stripping liquid is recovered by redistillation;Water is extracted into dehydration kettle, and water is separated, and the bottom of kettle is electronic grade semiconductor stripping liquid crude product;The crude product is refined using rectifying kettle, and electronic grade semiconductor stripping liquid pure product is collected from the top of kettle;Electronic grade semiconductor stripping liquid pure product is microfiltrated using peristaltic pump, and electronic grade semiconductor stripping liquid fine product is prepared.The present application not only effectively improves the utilization rate of stripping liquid, reduces environmental pollution, provides convenient conditions for waste treatment, but also improves safety factor, reduces operating cost, and is worth popularizing and using in industry.

The application relates to the technical field of reaction kettles, and discloses a fluid loss additive production device for well cementing and a production method thereof. The fluid loss additive production device for well cementing comprises a reaction modification unit, the reaction modification unit comprises a reaction kettle main body, a stirring mechanism, an online monitoring mechanism and a control end, the stirring mechanism comprises an upper stirring assembly and a bottom stirring assembly arranged at the lower end of the upper stirring assembly, and the upper stirring assembly comprises a driving motor, a stirring shaft, a lifting base, a plurality of stirring blades and an angle adjusting piece. The stirring mechanism is designed, the layered stirring structure form of the bottom fixed stirring piece and the upper adjustable stirring piece is adopted, and the self-adaptive adjusting algorithm is matched, so that the real-time dynamic automatic adjustment of the stirring height and the angle is realized, the dynamic change of the material parameters in the whole period of the fluid loss additive synthesis can be adapted, the uniformity of the material mixing in the kettle is improved, and the problems of kettle bottom deposition, local overtemperature and uneven mixing are solved.

A method for tracking the use of catalyst carriers (10) in a tubular reactor (1), the tubular reactor (1) comprising a plurality of reaction tubes (8), each reaction tube (8) configured to receive a plurality of catalyst carriers (10), the method comprising, for each of at least some of the catalyst carriers (10): marking the catalyst carrier (10) with a carrier identifier (31); reading the carrier identifier (31) when installing the catalyst carrier (10) in the reaction tube (8); and accessing a database (41) to retrieve and / or record installation data associated with the identified catalyst carrier (10).

A method and apparatus for preparing methyl methacrylate (MMA) are provided. The method includes an aldol condensation reaction, a first distillation, a second distillation, a third distillation, a phase splitting, and a fourth distillation. Through the control of the process, the aldol condensation reaction can be performed when methyl propionate is used as the ninth material stream and formalin solution is used as the fifteenth stream material, MMA is obtained as the final product from the third material stream, and the waste with low content of residual formaldehyde is recovered from the eighth material stream.

The application relates to the technical field of reaction kettles, and discloses a polymeric reaction kettle for coated asphalt production, which comprises a kettle body, a top cover, a driver and a power supply machine, the top cover is fixedly connected to the top end of the kettle body, high-pressure gas and rubber annular cylinders are sprayed to the materials at the bottom of the kettle body, the materials are extruded from two sides under the joint action, the materials at the bottom of the kettle body can be pushed to move upwards, cooperating with the feed inlet of the outer wall annular array of the rubber annular cylinder one, the materials in different areas in the kettle can be uniformly guided into the rubber annular cylinder one, the circulation conveying of the materials from the bottom to the top of the kettle body is realized; in addition, when the sleeve ring slides along the connecting rod one, the guide plate drives the annular rod, the limiting block drives the spray head to spray different areas at the bottom of the kettle body, the connecting rod one and the connecting rod two are cooperated to drive the rubber annular cylinder one and the rubber annular cylinder two to expand, the circulation range of the materials is further expanded, and the problem of material deposition at the bottom of the traditional reaction kettle is avoided.

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.

The application provides a system for preparing 3-hydroxypropionaldehyde by hydrating propenal and a preparation method of a catalyst, and comprises the following steps: S1: mixing a template agent, an aluminum source, a phosphorus source and a silicon source, adding a vanadium salt, a molybdenum salt and a salt solution of metal X, and obtaining an intermediate catalyst after heating and treatment; S2: mixing the intermediate catalyst, polyethylene glycol, citric acid and silica sol, and obtaining a formed V-Mo-X-SPAO-34 catalyst after drying and calcining. The application has the beneficial effects that: the catalyst prepared in the application has relatively mild reaction conditions in the reaction of preparing 3-hydroxypropionaldehyde by hydrating propenal, the process is simple, the generated by-products are few, and the catalyst is beneficial to large-scale continuous industrial production.

The present invention modernizes abandoned or underutilized petrochemical facilities for the production of jet fuel, diesel, naphtha, drilling fuel, and wax. It utilizes converted amine systems and PRISM units in brownfield situations to clean incoming syngas and achieve the optimal H2:CO ratio for conversion. This retrofit and repurposing introduces novel heat transfer elements into the Fischer-Tropsch (FT) reactor and employs proprietary FT catalysts to produce GTL products. It also adds a unique FT analyzer to monitor the hydrocarbon stream and assist in production, and a Coriolis flowmeter to accurately measure liquid wax flow without being affected by wax plugging or vibration. Feedstocks include a variety of sources such as natural gas, biomass, and the like.

To provide a synthesis apparatus and a synthesis method with which it is possible to carry out more proper control during a non-stationary operation.SOLUTION: A synthesis apparatus that synthesizes a synthesis target by an organic chemical reaction includes: a sensor to detect characteristics of the synthesis target; and a control device to carry out control on the basis of detected time series data that are time series data of the characteristics detected by the sensor. The control device stores reference time series data of the characteristics of the synthesis target and controls the synthesis apparatus on the basis of the detected time series data and the reference time series data.SELECTED DRAWING: Figure 3

This invention discloses a method for preparing and applying high-sensitivity thermochromic microcapsules, belonging to the field of thermochromic microcapsule preparation technology. This method is suitable for improving the thermal conductivity of microcapsules, reducing the influence of the microcapsule wall material on the thermal conduction rate between the core material and the environment, and is applicable to preparing antibacterial thermochromic silk fabrics with different color-changing temperatures. A three-component core material is encapsulated inside a shell material. While the wall material monomers are polymerized, nano-silver is doped. Under low temperature and low vacuum, ultraviolet-induced secondary polymerization improves the degree of polymerization and crystallinity of polystyrene, reducing defects between the filler and the wall material, resulting in a tighter bond between the two, thus preparing highly thermally conductive and antibacterial thermochromic microcapsules; antibacterial thermochromic silk fabric is then obtained through printing. This invention uses nano-silver to modify the microcapsule wall material and increases the wall material density through ultraviolet irradiation, which not only improves the thermal conductivity of the wall material and the color-changing sensitivity of the thermochromic microcapsules, but also endows the fabric with durable antibacterial properties.

A microfluidics-based nanoparticle synthesis system is provided. The nanoparticle synthesis system comprises: a microfluidic chip (81a); a reagent bottle (1a, 1b) which is connected with the microfluidic chip; and a flow control assembly comprising a pressure controller (10a) which is used for controlling the pressure in the reagent bottle. The system achieves high-accuracy flow control, and a microfluidic chip that can achieve high-efficiency and rapid mixing is also used in combination to finally achieve high-throughput and high-uniformity nanoparticle synthesis. A user may adjust the same instrument as required to achieve different throughputs without redesigning the instrument.

We provide an organic waste treatment device using subcritical hydrothermal decomposition. [Solution] The system is equipped with two subcritical reaction vessels 1 arranged in parallel, and a feeder 3 for supplying organic waste into the reaction vessel is connected to the top of each vessel. The two reaction vessels are arranged left and right, with a support frame between them. A pretreatment mechanism is provided on the top of the support frame, and this mechanism is connected to the feeder via piping 51. The pretreatment mechanism includes a stirring chamber 52, and a filter 54 is connected to the top of the stirring chamber by a flange 53, and a compression feeder component 6 is provided on the top of the filter. This compression feeder component includes a storage chamber 61 for feeding. The present invention enables the feeding and compression of organic waste, reduces the pretreatment process, improves processing efficiency, and avoids clogging of the piping.

To safely take out a conveyance mechanism provided in a reaction vessel. A take-out apparatus (30) according to the present disclosure takes out a conveyance mechanism (13) from a reaction apparatus (10) including a reaction vessel (11) and the conveyance mechanism (13), the reaction vessel (11) obtaining a product by causing a reaction of a substance to be treated that is charged into the reaction vessel (11), the conveyance mechanism (13) being provided in the reaction vessel (11) to convey the substance to be treated. The take-out apparatus (30) includes a housing vessel (31) hermetically coupled to the reaction vessel (11), and a coupling member (32) to be coupled to the conveyance mechanism (13) in the housing vessel (31), and the conveyance mechanism (13) is taken out from the reaction vessel (11) by moving the coupling member (32), and is housed in the housing vessel (31).

This invention belongs to the field of peroxide production technology, specifically relating to a continuous production apparatus and method for lauroyl peroxide. The continuous production apparatus for lauroyl peroxide includes a primary reactor, to which a secondary reactor, a tertiary reactor, and a filter tank are sequentially connected. Each of the primary, secondary, and tertiary reactors is equipped with a stirrer, with a spiral plate threaded onto its upper part. A motor is connected to the top of the stirrer. A conveyor belt is installed inside the filter tank, and a mother liquor outlet is located in the center of the bottom plate. The bottom plates on both sides of the mother liquor outlet are inclined. A primary washing tank, a secondary washing tank, and a tertiary washing tank are sequentially connected to the filter tank. Each of the primary, secondary, and tertiary washing tanks is equipped with a filter screen and a sprayer. This invention employs a multi-reactor series continuous production process, resulting in higher production efficiency and more stable operation.

To provide a synthesis system capable of reducing burden of an operator in flow synthesis.SOLUTION: A synthesis system 100 comprises a channel part 101 to a channel part 103 and a switching part 40. The channel part 101 is connected to a container 10 capable of housing a liquid raw material. The channel part 102 is connected to a container 20 capable of housing a liquid raw material. The channel part 103 connects the container 10 and the container 20. The channel part 103 is connected to a synthesis reaction apparatus 60 which generates a reactant from the liquid raw material. The switching part 40 is capable of switching a channel state of leading gas supplied by the gas supply part 30 to the channel part 101 and a channel state of leading gas supplied by the gas supply part 30 to the channel part 102.SELECTED DRAWING: Figure 1

This invention discloses a continuous flow microreactor flow rate control system and preparation method for the preparation of nano-β-MnO2, comprising a base, a first injection tube, a second injection tube, a microfluidic mechanism, and a collection mechanism. The first and second injection tubes are both fixedly mounted on the base, each containing a first reaction solution and a second reaction solution, respectively. The microfluidic mechanism is fixedly mounted on the base and communicates with the first and second injection tubes. A collection mechanism is also fixedly mounted on the base and communicates with the output end of the microfluidic mechanism. A temperature control mechanism for adjusting the temperature of the microfluidic mechanism is also provided on the base.

The present application relates to a kind of gas-liquid reaction kettle for preparing lithium carbonate, belong to gas-liquid reaction kettle preparation technical field.The reaction kettle includes kettle body, kettle cover and kettle bottom;In the reaction kettle, baffle is arranged close to the inner wall of kettle body;The upper end of baffle is fixedly connected with kettle cover, and the two side edges of baffle are fixedly connected with the inner wall of kettle body, to prevent gas leakage;The lower end of baffle is spaced apart from the inner wall of kettle bottom by a distance;At least one liquid inlet pipe and at least one gas inlet pipe are provided on the kettle cover, and a gas release valve is also provided on the kettle cover;The gas release valve is installed between the baffle and the kettle body close to the baffle.During the preparation of lithium carbonate, the gas inlet pipe is not blocked, and the utilization rate of carbon dioxide is high.