24 results about "Thermal depolymerization" patented technology

A geothermal system including a heat-driven process system using heat extracted from a magma wellbore for driving a thermal process. The system includes a magma wellbore connected to the heat-driven process system in a closed loop. A heated heat transfer fluid conveys the heat from the magma wellbore to a reactor housing a decomposition reaction. The reactor can be a batch reactor, a continuous reactor, or a through-flow reactor. The heat provides the reaction temperature necessary for driving the decomposition reaction of a polymer to an end product. The heat can be provided directly by the heated heat transfer fluid, by an intermediate heat transfer fluid heated by the heated heat transfer fluid, or by a reaction medium heated by the heated heat transfer fluid.

Belonging to the technical field of oil-gas field development, the invention provides a core-shell temporary plugging agent, which mainly comprises a shell capable of acidolysis of bio-based cellulose and a spherical core wrapped by the shell and capable of pyrolysis of a polymer. The molding material of the shell is hydroxypropyl methyl cellulose phthalate and sodium lignin sulfonate; the molding material of the spherical core body is a copolymer of N-isopropylacrylamide, acrylamide and sodium p-styrenesulfonate, and the temporary plugging agent has good dissolvability / degradability, has no requirements on the dissolved / degraded water quality environment, has strong adaptability to the environment and stability, and can be used as a temporary plugging agent. Accurate plugging and controllable plugging removal of a high-permeability layer of a heterogeneous oil reservoir are achieved through a double-response cooperation mechanism of'pH triggering shell layer disintegration (the threshold value is 2.5-3.5) and temperature driving core expansion (the threshold value is 60-120 DEG C) ', and the high-permeability plugging agent is suitable for fracture acidizing temporary plugging of common low-temperature oil and gas wells and can effectively meet the technical requirements of fracture acidizing temporary plugging of high-temperature deep wells. And excellent flexibility and reliability are achieved during operation, and the application prospect is good.

The invention relates to a system (1) for the thermal depolymerization of plastic waste, comprising a primary reactor (2) equipped with a heating device, an inlet (3) for feeding plastic waste, an outlet (27) for discharging an aerosol mixture, and an outlet (5) for discharging the solid residue, and the first condensation unit (4), which is equipped with the first primary vessel (10) and connected to the outlet (27) for discharging the aerosol mixture and is equipped with the outlet (6) for the liquid fraction and the outlet (7) for the gaseous fraction, further comprising a secondary reactor (8) equipped with a heating device and a catalyst and connected to the first condensation unit (4) via the outlet (6) for the liquid fraction, and further comprising the second condensation unit (9) which is connected to the secondary reactor (8).wherein a siphon-like pressure barrier (26) is arranged between the primary reactor (2) and the secondary reactor (8) and is placed in the first primary vessel (10).

A method for catalyzing the thermal decomposition of polyβ-hydroxybutyrate using a metal catalyst. The present invention belongs to the technical field of chemical recovery of organic materials. The present invention addresses the technical problem that existing methods for thermal decomposition of discarded polyβ-hydroxybutyrate require harsh conditions and the use of toxic catalysts, and lack a green catalytic system and method that can quickly and efficiently thermally decompose polyβ-hydroxybutyrate under mild conditions. The present invention uses green and environmentally friendly metal zinc and magnesium catalysts to catalyze the thermal decomposition of polyβ-hydroxybutyrate. The catalyst is non-toxic and odorless, has little harm to the environment, and can avoid the harm to the ecological environment caused by the use of other toxic metal catalysts. At the same time, the catalytic system of the present invention has a high catalytic efficiency and can catalyze the rapid and efficient thermal decomposition of polyβ-hydroxybutyrate under mild conditions, thereby avoiding the increase in energy consumption caused by reaction conditions such as high temperature and high pressure. It is helpful to achieve green recycling of discarded polyβ-hydroxybutyrate plastics.

This invention provides a photocatalytically modified asphalt based on waste rubber powder and its preparation method. The modified asphalt achieves this by precisely controlling the ratio of waste rubber powder, matrix asphalt, and a smoke suppressant made of graphite-phase carbon nitride. Simultaneously, a segmented gradient temperature-controlled calcination process is employed to prepare graphite-phase carbon nitride with a specific band gap. This ensures good interfacial compatibility among the raw material components, stable system formulation, and uniform and controllable precursor pyrolysis and polymerization reactions. Consequently, the graphite-phase carbon nitride possesses both porous physical adsorption and visible light photocatalytic activity. This allows for efficient adsorption and long-lasting photocatalytic degradation of asphalt fumes while fully preserving the excellent road performance and workability of the waste rubber powder-modified asphalt. The final product is a photocatalytically modified asphalt with simple components, controllable cost, excellent compatibility, long-lasting and stable smoke suppression effect, good process repeatability, and suitability for industrial mass production and widespread application in highway pavement engineering.

The invention relates to the technical field of waste composite material resourceful treatment, in particular to a waste wind power blade resourceful recycling method and system based on high-temperature plasmas. The method comprises the steps that waste wind power blades are subjected to cutting and foreign matter removal, vacuum infiltration type interface weakening pretreatment and pre-sorting and forming treatment, and fiber main line feeding is obtained; feeding the resin component into an outer ring vortex region of a vortex gradient plasma selective depolymerization reactor, introducing carrier gas to form a vortex flow field, and constructing an aerodynamic heat shielding layer between the vortex flow field and a central high-energy region, so that the resin component is subjected to thermal depolymerization and desorption in the outer ring vortex region, and generated cracked volatile matters enter the central high-energy region to be subjected to gas-phase reforming; the fiber solid phase is limited in the outer ring vortex area and moves along the path, separation of the two treatment paths is achieved, the desorbed fiber solid phase is subjected to cooling and in-situ surface treatment and recovery, reaction gas is subjected to quenching, dust removal and purification treatment, efficient resin conversion and fiber protection and recovery are both considered, and the fiber integrity and the recycling value are improved.

A geothermal system including a heat-driven process system using heat extracted from a magma wellbore for driving a thermal process. The system includes a magma wellbore connected to the heat-driven process system in a closed loop. A heated heat transfer fluid conveys the heat from the magma wellbore to a reactor housing a decomposition reaction. The reactor can be a batch reactor, a continuous reactor, or a through-flow reactor. The heat provides the reaction temperature necessary for driving the decomposition reaction of a polymer to an end product. The heat can be provided directly by the heated heat transfer fluid, by an intermediate heat transfer fluid heated by the heated heat transfer fluid, or by a reaction medium heated by the heated heat transfer fluid.

A container for a power storage device of the present embodiment is a container for a power storage device such as a transport container for when a single or a plurality of power storage devices are externally packaged and transported or moved, or a storage container for when a single or a plurality of power storage devices are externally packaged and stored. This container for a power storage device has a structure in which a thermally-depolymerizable polymer foam molded body is disposed in a gap between a container body that houses the power storage device and a region where the power storage device is housed in the container body. Such a container for a power storage device makes it possible to reduce the risk of fire spreading to the outside of the container when an abnormality occurs in a high-temperature environment or there is damage to the power storage device.

This flame retardant for plastics comprises any of a thermally depolymerizable polymer to which a water-soluble functional group, e.g., a carboxylic acid group or a sulfonic acid group, has been imparted, an alkali metal salt of the thermally depolymerizable polymer, and an alkaline-earth metal salt of the thermally depolymerizable polymer. Poly(methacrylic acid), for example, is preferred as the thermally depolymerizable polymer having a structure to which a water-soluble functional group has been imparted. Such flame retardant for plastics contains neither a halogen nor nitrogen nor phosphorus in the molecule and can suitably make general-purpose plastics flame-retardant.

This invention provides a method and apparatus for preparing monomers from polymethyl methacrylate (PMMA) through electromagnetic induction pyrolysis, belonging to the field of pyrolysis polymerization. The method includes: heating a metal catalyst heat carrier and a ceramic heat carrier in a rotating bed reactor to the depolymerization temperature of PMMA using electromagnetic induction; then adding crushed PMMA waste or raw materials, and the depolymerization reaction generates monomers. The apparatus is a rotating bed reactor, comprising a feeding system, a rotating reaction system with an electromagnetic induction heating system on its periphery, and a discharging system arranged sequentially. This invention utilizes electromagnetic induction heating technology, resulting in high heat transfer efficiency, good temperature control, and low heat loss; the improved rotating bed design ensures uniform temperature; and the combined use of a metal catalyst heat carrier and a ceramic heat carrier significantly shortens the heating time and improves the pyrolysis polymerization efficiency, enabling rapid and efficient pyrolysis polymerization of PMMA.

The present invention provides a flame-retardant water-based paint composition that can form a coating with good flame retardancy on buildings and building materials. [Solution] The flame-retardant water-based paint composition contains (A) a water-based binder resin and (B) a non-halogen-based water-soluble synthetic polymer flame retardant. As (B) the non-halogen-based water-soluble synthetic polymer flame retardant, a thermally depolymerizable polymer having a structure to which a water-soluble functional group having a specific structure is attached, its alkali metal salt, or its alkaline earth metal salt can be suitably used. In particular, poly(methacrylic acid), its alkali metal salt, or its alkaline earth metal salt can be suitably used.

The application discloses a reversible acrylate adhesive with excellent secondary bonding strength and a preparation method, a use method and an application thereof. The adhesive is a new reversible acrylate adhesive formed by combining the reversible anthracene group with the good double bond environment and pressure-sensitive characteristics of the acrylate system. Through the steps of photocuring, thermal depolymerization and photocuring, the problem of reduced strength after secondary bonding of the existing reversible adhesive is overcome, and the shear strength after secondary bonding is increased by 42% compared with that after primary bonding. In addition, the debonding rates of the adhesive in the present application in two debonding processes are 91% and 82% respectively, and the adhesive has good debonding performance. Therefore, the reversible acrylate adhesive can be effectively applied in the electronic field and solve the problem of poor mechanical properties after secondary bonding in the existing reversible electronic adhesive field.

The invention relates to a resourceful treatment process for an alkylation byproduct low-boiling-point substance in a BHT production process. The process mainly comprises three steps of preheating depolymerization, multi-stage water washing and phase separation purification, wherein firstly, low-boiling-point substances are preheated and depolymerized at the temperature of 50-60 DEG C, and residual isobutene is recovered; then, through three times of countercurrent water washing, TBA is transferred to a water phase by utilizing the hydrophilicity of TBA, and DIB is retained in an oil phase; and finally, concentrating and purifying the water phase by adopting a stripping tower to obtain industrial grade TBA with the concentration of more than or equal to 98wt%, rectifying the oil phase by adopting normal pressure to obtain industrial grade DIB with the concentration of more than or equal to 95wt%, and carrying out incineration treatment on residual liquid. According to the method, thermal activation and water washing are combined, the TBA / DIB azeotropic separation problem is effectively solved, high-energy-consumption azeotropic distillation is replaced, the technological process is simple, the operation condition is mild, the equipment requirement is low, the amount of hazardous waste can be reduced by 90% or above, the recycled product meets the relevant national standard, the resource utilization rate is high, economical efficiency is good, and industrial application and popularization are easy.

A vertically oriented screw (3) takes up material at the bottom of the reactor (1), the material is then at least partially compressed by the rotating screw (3) to form a gas-tight plug and is moved downwards through the vertical transfer channel (2). The reactor (1) has a rotary agitator (5), the axis of rotation of which is coincident with the axis of rotation of the screw (3), preferably the agitator (5) and the screw (3) are mounted on a common shaft assembly (6). If the agitator (5) rotates in the first direction, it mixes the mass inside the reactor (1), if it rotates in the second direction, it directs the material into the inlet mouth of the transfer channel (2), while the screw (3) moves the material downwards in the transfer channel (2). The reactor (1) includes a vertically oriented transfer channel (2), inside of which there is a rotating screw (3). The inlet of the transfer channel (2) is at the bottom of the reactor (1), with the upper end of the screw (3) at the inlet of the transfer channel (2) or above the inlet of the transfer channel (2). The transfer channel (2) may be provided with a valve (4) at its bottom.

The invention discloses a high-light-fastness differential special uniform fabric and a preparation method thereof. The high-light-fastness differential special uniform fabric is prepared from polyester fibers, polybasic acid, a phosphorus flame retardant, nano ZnO, a melt spinning aid, a dyeing agent, a color fixing agent and an antistatic agent. The preparation method comprises the following steps: step 1, raw material pretreatment; step 2, melt spinning; step 3, dyeing treatment; step 4, fixation treatment; step 5, applying an antistatic agent; step 6, quality control and performance test; by adding the novel color fixing agent, a layer of uniform and compact film can be formed on the textile fabric, the possibility of color fading of dye due to photochemical reaction is reduced, sufficient combination of the dye and fibers is facilitated, the dyeing uniformity and fastness are improved, and by adding the phosphorus flame retardant, the thermal decomposition speed of the polyester fibers is increased, and the color fastness of the textile fabric is improved. And the pyrolysis polymer is esterified and dehydrated through polybasic acid to form a carbonaceous layer to prevent oxygen and heat transfer, so that the purpose of improving the flame retardant property is achieved.

The invention discloses a method for producing sustainable aviation fuel by catalytically pyrolyzing polyolefin waste plastics through a metal-hierarchical pore molecular sieve, which comprises the following steps: preparing metal and a hierarchical pore molecular sieve: firstly, adding a quantitative nano carbon material as a mesoporous template in a hydrothermal synthesis process of the molecular sieve, and then calcining the nano carbon material at high temperature to obtain the metal-hierarchical pore molecular sieve. The preparation method comprises the following steps: preparing a mesoporous molecular sieve through a hydrothermal method to obtain a hierarchical pore molecular sieve rich in mesopores, loading a certain amount of active metal on the hierarchical pore molecular sieve rich in mesopores through a wet impregnation method to obtain a bifunctional metal-hierarchical pore molecular sieve, and carrying out catalytic cracking on polyolefin through the metal-hierarchical pore molecular sieve to convert the polyolefin into SAFs. Mesopores are introduced through a template method to control pore channel spatial characteristics, a hierarchical pore molecular sieve of a micro-mesoporous composite structure is synthesized, then the acid strength and the acid density of the catalyst are regulated and controlled by loading active metal, and the bifunctional molecular sieve with matched acidity and pore structure is obtained.

Disclosed is a multi-stage continuous pyrolysis reactor using molten salt, and more specifically to a multi-stage continuous pyrolysis reactor that thermally decomposes polymer waste, such as waste plastics, under anaerobic or oxygen-deficient conditions. The multi-stage continuous pyrolysis reactor using molten salt according to the present invention comprises: a reactor body (100), a multi-stage pyrolysis furnace (200), a drive sprocket (330), a driven sprocket (340), a chain (350), a plurality of transport members (360), and a molten salt circulation unit (400).

This water-inclusive fire extinguishing agent contains, as a component of a fire extinguishing agent, a thermally depolymerizable polymer having a structure to which a water-soluble functional group is imparted, an alkali metal salt thereof, or an alkaline earth metal salt thereof. It is preferable that the thermally depolymerizable polymer having a structure to which a water-soluble functional group is imparted has a structure that is represented by a specific chemical formula. In the case of the alkali metal salt, a sodium (Na) salt, a potassium (K) salt, or the like can be used. In the case of the alkaline earth metal salt, a calcium (Ca) salt, a magnesium (Mg) salt, or the like can be used. Such a water-inclusive fire extinguishing agent has high fire extinguishing performance, and can easily extinguish a fire by being sprayed.

A power storage device structure according to the present invention comprises a power storage device and a casing that encloses the power storage device with a gap therebetween, and has a structure in which a thermally-depolymerizable polymer foam-molded body is disposed in the gap between the power storage device and the casing. Such a power storage device structure makes it possible to reduce the risk of ignition when an abnormality occurs, such as damage to or overcharging of the power storage device, or in particular, a power storage device stack in which a plurality of the power storage devices are stacked.

The invention discloses an intelligent temperature control system and method for a thermal depolymerization reaction. The system comprises a temperature acquisition module, a data processing module, a control decision module and an execution module. Multiple types of sensors are deployed through three-dimensional grid nodes to collect a temperature sequence, a temperature change rate and a gradient module value parameter set are generated through time-space domain feature extraction, PID control parameters and quantum annealing coefficients are optimized through a quantum annealing fruit fly optimization algorithm, and heating power and cooling flow instructions are dynamically generated. According to the method, a temperature field is reconstructed through a weighted Delaunay triangulation method fusing geometric optimization and data weight, and the global optimization capability is enhanced by combining a dynamic weight fitness function and a quantum tunneling effect, so that full-stage self-adaptive temperature control is reflected. According to the invention, the limitation of traditional PID control is broken through, the temperature control precision, the intelligent level and the reaction stability are improved, and an efficient and reliable solution is provided for intelligent temperature control in the thermal depolymerization reaction process.

To provide a container for a power storage device capable of reducing the risk of fire spreading to the outside of the container at the time of abnormality such as breakage of the power storage device or a high temperature environment.SOLUTION: The container for a power storage device includes a container body for a power storage device that accommodates the power storage device, and a mesh-like bag or basket that accommodates foamed particles of a thermally depolymerizable polymer disposed in a gap between the container body for a power storage device and the power storage device.SELECTED DRAWING: None

To provide a water-added fire extinguishing agent which exhibits high fire extinguishing performance and allows fire extinguishment to be easily carried out by spraying.SOLUTION: A water-added fire extinguishing agent contains, as a fire extinguishing agent component, a thermally depolymerizable polymer having a structure to which a water-soluble functional group is imparted, an alkali metal salt thereof, or an alkaline earth metal salt thereof, wherein the thermally depolymerizable polymer having a structure to which a water-soluble functional group is imparted preferably has a structure represented by a specific chemical formula, and, in the case of the alkali metal salt, a sodium (Na) salt or a potassium (K) salt can be used, and, in the case of the alkaline earth metal salt, a calcium (Ca) salt or a magnesium (Mg) salt can be used.SELECTED DRAWING: None

The application relates to a nitrogen-doped multi-level microporous carbon material and a preparation method thereof, and belongs to the technical field of carbon materials. A conjugated microporous polymer of an alkyne porphyrin is obtained by coupling reaction of a halogenated aromatic hydrocarbon containing bromine and an alkyne benzene compound under the joint action of copper and palladium catalysts. By pyrolysis at different temperatures, some functional groups in the polymer are cracked and escape in the form of gas, which continuously forms pores in the carbon skeleton and gradually changes into a nitrogen-doped multi-level microporous carbon material. The nitrogen-doped sites in the structure of the multi-level microporous carbon material generate defect sites and provide a large number of active sites; meanwhile, the multi-level microporous structure forms a three-dimensional through structure between pores, effectively shortening the ion diffusion path; pyrolysis can change the polymer skeleton into a short-range ordered structure, providing an interlayer embedding channel for ions; and the energy storage mechanism of the material is defect adsorption, interlayer embedding and micropore filling respectively.

A power storage device structure includes a power storage device and a casing that externally encloses the power storage device with a gap therebetween, and has a configuration in which a molded body including a thermally depolymerizable polymer is disposed in the gap between the power storage device and the casing. The molded body has a film shape, a sheet shape, or a plate shape.