38results about "Petroleum wax refining" patented technology

A method of removing paraffinic wax from pyrolysis oil that includes flowing pyrolysis oil into a tank and reducing the temperature of the pyrolysis oil to a temperature that causes the paraffinic wax that is in solution in the pyrolysis oil to precipitate and form (1) paraffinic wax in solid form and (2) remaining pyrolysis oil in liquid form. The method further includes pumping the remaining pyrolysis oil from the tank to a first location. The method then involves heating the paraffinic wax in solid form to form paraffinic wax in liquid form and pumping the paraffinic wax in liquid form to a second location. In this way, the paraffinic wax and the remaining pyrolysis oil can be processed separately according to their respective properties.

The invention discloses a Y-type molecular sieve and a preparation method thereof, a catalyst and a preparation method thereof, and a Fischer-Tropsch wax hydrocracking method, and belongs to the technical field of chemical engineering. The method comprises the following steps: S1, mixing a first alkali source, a first aluminum source, a first silicon source, first water and a template agent to obtain a first mixed solution, and pre-crystallizing to obtain a seed crystal guiding agent; the pre-crystallization temperature is 15-35 DEG C, the pre-crystallization time is 24-60 hours, and the template agent is poly (diallyldimethylammonium chloride); s2, mixing a second alkali source, a second aluminum source, a second silicon source and second water to obtain mother liquor; mixing the guiding agent and the mother liquor to obtain initial gel; crystallizing the initial gel to obtain an alkali metal Y-type molecular sieve; and S3, mixing the alkali metal Y-type molecular sieve with an ammonium-containing solution, carrying out ammonium ion exchange treatment to obtain a first Y-type molecular sieve, and carrying out first roasting treatment to obtain a second Y-type molecular sieve. The particle size of the molecular sieve is smaller than 520 nm, and the silica-alumina ratio is larger than 6.5.

The invention discloses a wax recovery treatment method which comprises the following steps: stirring, dissolving and precipitating wax in a sodium hydroxide solution to obtain supernate; adding the supernatant into boric acid, stirring to obtain jelly, filtering the jelly, washing, and drying to obtain a dried substance; mixing and stirring the dried substance and methanol, and drying to obtain a wax solid substance; and purifying the wax solid with a distillation extract of petroleum ether. According to the method, impurities in the wax are effectively removed, and the recovery purity and quality of the wax are improved, so that the service life of the wax is prolonged, the production cost is reduced, and the aims of saving resources and protecting the environment are fulfilled.

The invention relates to the technical field of chemical production equipment, in particular to a refining device for chlorinated paraffin. The invention provides a refining device for chlorinated paraffin. The refining device comprises a supporting frame body, a degassing tank is fixedly mounted in the supporting frame body, a feeding pipe and an exhaust pipe are arranged at the top of the degassing tank, a discharging pipe is arranged at the bottom of the degassing tank, a motor is mounted on the supporting frame body, and an output shaft of the motor is connected with a stirring paddle extending into the degassing tank; a gas inlet cavity is formed in the lower part of the stirring paddle, the bottom of the degassing tank is fixedly connected with an annular box, and the stirring paddle penetrates through the annular box. The Venturi tube type compressed air bag is used for pressurizing inert gas, so that the inert gas overcomes the resistance of viscous liquid and forms fine bubbles, and the air-liquid contact area is increased; the stirring paddle is matched to drive the gas bag to rotate, so that bubbles are uniformly distributed, the retention time is prolonged, and the removal efficiency of impurities such as hydrogen chloride and chlorine is greatly improved; and the intermittent exhaust device can also avoid waste of gas which is not fully utilized due to continuous exhaust.

The utility model relates to the technical field of paraffin separation, in particular to a separation device for producing light liquid paraffin, which comprises a separation barrel, a conical barrel is fixedly connected to the bottom of the separation barrel, a crushing assembly for crushing wax crystals is arranged in the separation barrel, and the crushing assembly comprises a rotating shaft rotationally connected to the interior of the separation barrel. According to the wax crystal crushing device disclosed by the utility model, wax crystals continuously impact the crushing barrel through the arranged crushing assembly, so that large wax crystals are further promoted to be crushed into a plurality of small wax crystals, liquid wax attached to the wax crystals is promoted to fully overflow through the manner, and the wax crystals can be crushed into small wax crystals; meanwhile, later-stage wax crystal output is facilitated, the blockage condition is avoided, meanwhile, accurate temperature control is not needed by adopting a natural cooling mode, and the complexity in the production process is reduced.

Provided is a continuous process for converting waste plastics for recycling for polyethylene polymerization or for linear alpha olefins. The process includes selecting waste plastics containing polyethylene and / or polypropylene and then passing the waste plastics through a pyrolysis reactor to thermally decompose at least a portion of the polyolefin waste and produce a pyrolysis effluent. The pyrolysis effluent is separated into off-gas, a naphtha / diesel fraction, a heavy fraction, and char. The naphtha / diesel fraction is passed to a crude refinery unit, from which a straight-run naphtha (C5-C8) fraction or a propane / butane (C3-C4) fraction is recovered. The straight-run naphtha fraction or the propane and butane (C3-C4) fraction is passed to a steam cracker for ethylene production. The ethylene is converted to linear alpha olefins and / or polyethylene. The heavy fraction from the pyrolysis reactor can also be combined with the heavy fraction of the linear alpha olefin stream recovered from the steam cracker. The combined heavy fraction and the heavy fraction of the normal alpha olefin stream may be passed through a wax hydrogenation zone to produce wax.

The utility model relates to the field of cleaning devices, in particular to a device for cleaning light liquid paraffin, during operation, water and oil in a tank body of a liquid preparation tank are layered, the light liquid paraffin is located on the upper layer, water-phase liquid is located on the lower layer, and the water-phase liquid on the lower layer of the liquid preparation tank continuously flows out of a liquid outlet under the action of a peristaltic pump. The liquid in the tank is kept in a rotating state by virtue of a plurality of electric stirring paddles, the water-phase liquid can be fully contacted with the light liquid paraffin layer when flowing through the light liquid paraffin layer and then sinks into the lower layer by virtue of the rotation, and the oil phase and the water phase are completely layered after the water-phase liquid is fully circulated and is subjected to standing; water-phase liquid is discharged and discarded through the discharging pipe, then cleaned light liquid paraffin is sent out and collected, in the circulation process, compound impurities in materials can be effectively screened out through the filter screen cover arranged at the bottom of the limiting barrel, and the cleaning effect on the materials is effectively improved.

A method of removing paraffin wax from a pyrolysis oil includes flowing the pyrolysis oil into a tank and reducing the temperature of the pyrolysis oil to a temperature that precipitates paraffin wax dissolved in the pyrolysis oil and forms (1) the paraffin wax in solid form and (2) the remaining pyrolysis oil in liquid form. The method further includes pumping the remaining pyrolysis oil from the tank to a first location. The method then includes heating the paraffin wax in solid form to form a paraffin wax in liquid form, and pumping the paraffin wax in liquid form to a second location. In this manner, the paraffin wax and the residual pyrolysis oil can be treated separately according to their respective properties.

The present disclosure generally relates to methods for deoiling a hydrocarbon feed and to products formed therefrom. In an embodiment is provided a method of deoiling a feed that includes introducing a waxy feed and a deoiling solvent to a dilution chilling zone; mixing the waxy feed and the deoiling solvent in the dilution chilling zone at a temperature of from about 10° F. to about 30° F. to form a slurry; introducing the slurry to a filter zone, the filter zone comprising one or more filter stages, wherein a temperature of the slurry is from about 40° F. to about 75° F.; separating the wax from the oil and the deoiling solvent to form a wax cake in a first filter stage; and washing the wax cake in the first filter stage with the deoiling solvent to obtain a composition comprising a wax. In another embodiment is provided a composition comprising a wax.

The utility model relates to the technical field of separation devices, and discloses an oleic acid separation device which comprises a separation barrel, an observation window is fixedly connected to the front face of the separation barrel, a heating cavity is formed in the separation barrel, the interior of the device can be observed through the observation window, and the separation effect and the miscellaneous matter cleaning condition can be observed conveniently. And a heating cavity is arranged to heat the device. The device has the following advantages and effects that through the arrangement of the separation barrel, the stirrer and the hydraulic lifting column, a worker puts raw materials into the separation barrel, the heating cavity in the separation barrel can heat the raw materials, the stirrer stirs the raw materials, the scraping plate scrapes and brushes the interior of the separation barrel at the same time, and at the moment, oleic acid becomes gas; and when too much impurities are adhered to the stirrer, the hydraulic lifting column is started to lift the barrel cover to clean the impurities on the stirrer and the scraping plate, so that the effects of being convenient to disassemble, assemble and clean are achieved.

The invention provides a microcrystalline wax hydrofining catalyst, a preparation method thereof and a method for preparing microcrystalline wax by using the microcrystalline wax hydrofining catalyst, and relates to the field of catalysts. The preparation method comprises the following steps: dropwise adding aluminum sulfate into water at 60-70 DEG C, controlling the pH value of a system to be 6-7, then dropwise adding water glass and ammonia water, and controlling the pH value of the system to be 8-8.5; circularly dropwise adding aluminum sulfate, water glass and ammonia water, reacting at 75-78 DEG C, then carrying out constant-temperature aging treatment, carrying out solid-liquid separation, and washing the solid to obtain modified silicon-aluminum powder; mixing the modified silicon-aluminum powder, organic acid, inorganic acid, an extrusion aid and water, molding, drying and roasting to obtain a catalyst carrier; tungsten salt, cobalt salt, nickel salt, phosphoric acid and water are mixed to prepare steeping liquor, the catalyst carrier is added into the steeping liquor to be steeped, and drying and roasting are conducted to obtain the microcrystalline wax hydrofining catalyst. The catalyst provided by the invention is suitable for inferior microcrystalline wax raw materials with high impurity content, and the obtained microcrystalline wax is good in quality.

A method for removing paraffin wax from pyrolysis oil includes flowing the pyrolysis oil into a tank and reducing the temperature of the pyrolysis oil to a temperature that causes the paraffin wax in solution in the pyrolysis oil to precipitate, forming (1) the paraffin wax in solid form and (2) residual pyrolysis oil in liquid form. The method further includes pumping the residual pyrolysis oil from the tank to a first location. Next, the method includes heating the solid paraffin wax to form the liquid paraffin wax and pumping the liquid paraffin wax to a second location. In this way, the paraffin wax and the residual pyrolysis oil can be treated separately according to their respective properties.

The invention provides a process for preparing a hydrowax comprising the steps of: (a) providing a hydrocarbonaceous feedstock which contains more than 4% by weight of hydrocarbons boiling in the range of from 550 to 800 °C; (b) hydrotreating the hydrocarbonaceous feedstock with a hydrotreating catalyst in the presence of a hydrogen- containing gas under hydrotreating conditions to obtain a hydrotreated product; (c) hydrocracking at least part of the hydrotreated product as obtained in step (b) with a hydrocracking catalyst in the presence of a hydrogen-containing gas under hydrocracking conditions to obtain a hydrocracked product, which hydrocracking catalyst contains a zeolitic component which is present in an amount of at least 14 wt%, based on the total weight of the hydrocracking catalyst, and wherein the volume ratio of the hydrotreating catalyst as used in step (b) and the hydrocracking catalyst is more than 1; and (d) recovering from the hydrocracked product as obtained in step (c) the hydrowax.

The invention provides a Fischer-Tropsch wax filter which comprises a rotating device, a machine body, a main shaft, a filter part and a feeding inner part, a feeding pipe is arranged at the bottom of the machine body, the main shaft is located in the machine body, a discharging pipe extending out of the machine body is arranged at the bottom of the main shaft, the filter part is arranged on the periphery of the main shaft, the feeding inner part is located in the machine body, and the feeding inner part covers a port of the feeding pipe. The rotating device is used for driving the spindle to rotate. According to the Fischer-Tropsch wax filter disclosed by the invention, a Fischer-Tropsch wax filtering process is realized, and clear filtrate is obtained; after filtering, filter residues on the filtering piece can be thrown out, and the filtering effect is kept; according to the Fischer-Tropsch wax filter disclosed by the utility model, the feeding inner part has a shunting effect on the to-be-filtered liquid in the feeding pipe, so that the to-be-filtered liquid is more uniformly distributed in the machine body, the blockage caused by accumulation of a catalyst and a solid in wax liquid is prevented, the large-scale Fischer-Tropsch wax filtering treatment is met, the filtering precision and the filtering capacity are relatively high, the maintenance frequency is reduced, and the cost of spare part loss is further reduced.

The utility model relates to the technical field of light liquid paraffin rectification separation, in particular to a light liquid paraffin rectification separation mechanism which comprises a supporting frame, a rectification tank is fixedly connected in the supporting frame, the top of the rectification tank is communicated with an air outlet pipe, and the side wall of the rectification tank is fixedly connected with a condenser through a fixing plate. One end of the air outlet pipe is fixedly connected to the input end of the condenser, the output end of the condenser is fixedly connected with a liquid return pipe, the outer wall of the liquid return pipe is communicated with a discharging pipe, the side wall of the rectification tank is communicated with a material conveying pipe, and the bottom of the rectification tank is communicated with a discharging pipe. And a gas-liquid contact mechanism for fully increasing the contact area of gas and liquid is arranged in the rectification tank. Compared with the prior art, the problems of low separation efficiency, low purity and the like caused by insufficient contact area and time in the prior art are solved, a high-efficiency and stable separation process is realized, and the requirements on high-purity light liquid paraffin are met.

The utility model relates to the technical field of wax-water separation equipment, in particular to a micro-negative-pressure steam heating wax-water separator which comprises a separator shell, a steam generator is arranged on one side of the separator shell, the steam generator is provided with a water tank, the separator shell is provided with a deslagging drain pipe, and the deslagging drain pipe is provided with a water inlet pipe and a water outlet pipe. A deslagging and drainage pipe is arranged in the separator shell, the deslagging and drainage pipe is communicated with the separator shell, a deslagging and drainage valve is arranged on the deslagging and drainage pipe, the separator shell is provided with a wax temperature probe, the wax temperature probe is used for measuring the temperature of wax liquid in the separator shell, the separator shell is provided with a wax outlet pipe, and the wax outlet pipe is communicated with the separator shell. A pump inlet heat preservation valve is arranged on the wax outlet pipe, the wax outlet pipe is provided with an electric gear pump, a steam discharging pipe is arranged in the separator shell, liquid in the separator shell is evenly stirred through the stirring rod, the separation efficiency is improved, the steam discharging pipe uses high-temperature steam as a heat source, and wax liquid heating is safer and more reliable.

The utility model discloses a Fischer-Tropsch wax purification device, which relates to the technical field of Fischer-Tropsch wax production, and comprises a mixing box, a connecting pipe is arranged at the lower end of the mixing box, a filter box is arranged at the lower end of the connecting pipe, the filter box is supported by a support rod, and an adding pipe I and an adding pipe II are respectively arranged at the upper end of the mixing box. A pneumatic stirring assembly is installed in the mixing box, a control valve is installed on the surface of a connecting pipe, a filter frame is slidably installed in the filter box below the connecting pipe, a filter screen is installed at the bottom end of the filter frame, an exhaust pipe is installed at one end of the filter box below the filter screen, an exhaust fan is installed at one end of the exhaust pipe, and an air inlet is formed in the other end of the filter box. According to the utility model, the pneumatic stirring component is arranged, a pneumatic device in the pneumatic stirring component exhausts gas into the gas dispersing disc through the breather pipe and exhausts the gas from the branch pipe on the gas dispersing disc, and bubbles rise from the bottom of a mixture of a solvent and wax hydrocarbon, so that the stirring of the solvent and the wax hydrocarbon is realized, and the sufficient mixing of the solvent and the wax hydrocarbon is facilitated.

The present invention discloses a method for hydrofining of paraffin. The method comprises the following steps: mixing hydrogen with paraffin raw materials, first passing through a microinterface generator, breaking the hydrogen into microbubbles with a diameter of 1 μm to 1 mm, and then entering a reactor to contact with a catalyst for a hydrofining reaction; wherein the reactor comprises three catalyst beds, along the flow direction of the reactants, the first bed is filled with a protective agent, the second bed is filled with a type I paraffin hydrofining catalyst, and the third bed is filled with a type II paraffin hydrofining catalyst; wherein the filling volumes of the protective agent, the type I paraffin hydrofining catalyst, and the type II paraffin hydrofining catalyst account for 2% to 10%, 20% to 40%, and 50% to 78% of the total volume of the reactor, respectively. The method of the present invention solves the problem that the life of the paraffin hydrofining catalyst is shortened due to the deposition of carbon deposits, prolongs the life of the paraffin hydrofining catalyst, and improves the operation cycle of the paraffin hydrogenation device.

This utility model discloses a dewaxing device for lubricating oil base oil, including a preheating tank, a primary cooling tank and a secondary cooling tank sequentially arranged at the rear end of the preheating tank, and a filter box arranged at the rear end of the secondary cooling tank; the upper end of the preheating tank is provided with an oil inlet and an additive inlet, and a heat exchange tube for heating the preheating tank is arranged around its outer wall; the primary and secondary cooling tanks are respectively provided with oil delivery pipes for conveying base oil, and a first coolant tank and a second coolant tank are respectively connected to the primary and secondary cooling tanks for cooling the base oil in the oil delivery pipes; the filter box is provided with a vibrating screen and a filter plate for filtering the cooled base oil, a vibrating motor is provided at the bottom of the vibrating screen, and an oil outlet pipe is provided at the bottom of the filter box; the device also includes a PLC controller. This utility model improves the dewaxing effect and realizes wax recovery.

The invention provides a Fischer-Tropsch wax crude product decolorization method, which comprises: adding an adsorbent A and a first auxiliary agent material to a molten Fischer-Tropsch wax crude product to carry out first adsorption, and then adding an adsorbent B and a second auxiliary agent material to carry out second adsorption, the adsorbent A is prepared from activated carbon, zeolite, silica gel and activated clay; the adsorbent B is at least one of activated carbon, zeolite, silica gel and activated clay; the first auxiliary material is at least one of diatomite, talcum powder and activated carbon; the second auxiliary material is at least one of diatomite, talcum powder and activated carbon; the components of the first auxiliary material and the second auxiliary material are consistent. The activated carbon, the zeolite, the silica gel and the activated clay in the adsorbent A have a synergistic effect, a multi-layer and wide-range adsorption network is constructed, and compared with a traditional single adsorption material, various color development substances and impurities in the Fischer-Tropsch wax can be more comprehensively and efficiently removed.

The utility model discloses an impurity removing and separating device for chlorinated paraffin production, which comprises a device tank with an open top end, an upper cover plate is detachably mounted at the top end of the device tank, and a connecting ring is fixedly connected to the middle of the bottom end of the upper cover plate. According to the impurity removing and separating device for chlorinated paraffin production, stirring blades and a net cylinder are arranged, in the actual use process of the device, solid chlorinated paraffin is contained in the net cylinder, then an upper cover plate is installed at the top end of a device tank, then an electric heating wire outside the device tank starts to heat, the solid paraffin can be melted and drips downwards from the net cylinder, and then the solid chlorinated paraffin is separated from the net cylinder; meanwhile, stirring blades start to rotate, the volatilization speed of hydrogen chloride in chlorinated paraffin is increased, so that the overall impurity removal efficiency is improved, and after the whole impurity removal operation is finished, solid impurities are left in the mesh cylinder, so that the device can remove the solid impurities while removing hydrogen chloride, and the practicability of the device is improved.

This invention discloses a system and method for treating impurities in Fischer-Tropsch tail wax, comprising the following steps: heating the Fischer-Tropsch tail wax in a storage tank to a completely melted state; conveying the liquid Fischer-Tropsch tail wax in the storage tank to an inorganic membrane filtration unit via a feed pump, filtering and separating impurities in the liquid Fischer-Tropsch tail wax to obtain Fischer-Tropsch tail wax permeate; passing the flushing liquid from the backwashing system into the inorganic membrane filtration unit to clean the inorganic membrane; and discharging the filtered impurities and flushing liquid through a settling tank; wherein the pipelines used for conveying Fischer-Tropsch tail wax between the storage tank, feed pump, and inorganic membrane filtration unit are all equipped with heat tracing. This invention can effectively remove trace impurities from solid or semi-solid Fischer-Tropsch tail wax, resulting in a total metal content of less than 5 PPM in the treated tail wax.

A method of removing paraffinic wax from pyrolysis oil that includes flowing pyrolysis oil into a tank and reducing the temperature of the pyrolysis oil to a temperature that causes the paraffinic wax that is in solution in the pyrolysis oil to precipitate and form (1) paraffinic wax in solid form and (2) remaining pyrolysis oil in liquid form. The method further includes pumping the remaining pyrolysis oil from the tank to a first location. The method then involves heating the paraffinic wax in solid form to form paraffinic wax in liquid form and pumping the paraffinic wax in liquid form to a second location. In this way, the paraffinic wax and the remaining pyrolysis oil can be processed separately according to their respective properties.

The utility model relates to the technical field of chlorinated paraffin processing, and discloses a deacidification kettle for chlorinated paraffin processing, which comprises a mounting table, a kettle body is fixedly connected onto the mounting table, a transmission pipe is rotatably connected into the kettle body, a plurality of stirring rods are fixedly connected onto the outer surface of the transmission pipe, and the stirring rods are fixedly connected onto the mounting table. According to the deacidification kettle for chlorinated paraffin processing, chlorinated paraffin liquid in the kettle body is pumped into the transmission pipe through the material pumping mechanism, and then is discharged through a material scattering opening in a material scattering pipe on the transmission pipe, so that the chlorinated paraffin liquid is uniformly dispersed in the transmission pipe, and the chlorinated paraffin liquid is uniformly dispersed in the transmission pipe. Meanwhile, the transmission pipe drives the material scattering pipe to rotate, so that the heated chlorinated paraffin solution is uniformly scattered in the kettle body, the gaseous HCL formed by heating is effectively discharged from the chlorinated paraffin solution, and the deacidification effect on the chlorinated paraffin solution is greatly improved.

The invention discloses a wax recycling method which comprises the following steps: placing a waste wax material in a vacuum chamber, keeping for a first preset time, and controlling the temperature in the vacuum chamber to be a preset temperature and the vacuum degree to be a preset vacuum degree, so that the waste wax material is melted; after the molten waste wax material is cooled and layered, wax with impurities on the bottom layer is obtained; putting the wax containing the impurities into a water tank, adding deionized water, and heating to a boiling state to obtain a first wax liquid; adding a hydrochloric acid solution with a preset concentration and alum with a preset weight into the first wax liquid, cooking for a second preset time, and keeping in a boiling state for a third preset time to obtain a second wax liquid; and standing the second wax liquid in the water tank for a fourth preset time to precipitate impurities in the second wax liquid, and obtaining pure wax according to the clear liquid wax liquid on the surface layer. By adopting the technical scheme provided by the invention, the wax can be simply and effectively recycled.

The invention relates to a preparation method of molecular biological grade high-melting-point light paraffin oil. The method comprises the following steps: S1, removing interfering substances in the light paraffin oil by using stearic acid; s2, washing and drying; s3, kaolin adsorption; s4, separating; and S5, verifying the performance. The high-melting-point light paraffin oil prepared through the scheme has the characteristic of being capable of being solidified at the normal temperature, meanwhile, liquid in a fluorescent PCR amplification tube can be effectively sealed, the stability of an amplification system is ensured, and the fluorescent PCR amplification result is not affected. The high-melting-point light paraffin oil can be applied to full-automatic fluorescent PCR amplification equipment, so that a mechanical arm for opening and closing a PCR tube cover is omitted, the equipment size is reduced, and the equipment cost is reduced.

The present invention relates to the technical field of vaseline preparation, and specifically discloses a pharmaceutical-grade vaseline and a preparation method thereof. A preparation method of pharmaceutical-grade vaseline, comprising hydrogenation refining, degassing and deodorization, product adjustment and three-stage filtration, wherein the product adjustment is by adding an appropriate amount of a product regulator composed of gelatin, microcrystalline cellulose, sucrose stearate and lanolin alcohol, and the mass ratio of gelatin, microcrystalline cellulose, sucrose stearate and lanolin alcohol is 1: (0.8~1.2): (0.5~0.8): (0.1~0.5). The present application realizes precise control of the dropping point and cone penetration of pharmaceutical-grade vaseline through a specific product regulator, thereby obtaining pharmaceutical-grade vaseline with excellent stability and use effect.

The present invention relates to a method for preparing phase change wax by sweating and a sweating dish device with an external circulation heat-insulating water system used in the method, including a method for preparing phase change wax by using a solid oil-containing regulator and a sweating dish device with a high heat-conducting sieve plate. The sweating dish device includes a sweating dish body with a valve provided at the lower outlet and a multi-layer high heat-conducting sieve plate arranged in the sweating dish body; a heat-insulating interlayer is provided in the sweating dish body; a water inlet and a water outlet are provided on the heat-insulating interlayer. Sweating includes the following steps: preliminary work, preparation of the sweating dish device; preparation of the mixed material, loading operation, cooling operation; heating operation; after the heating is completed, the material remaining after sweating in the sweating dish device is taken out for white clay refining, decolorization, and molding to obtain phase change wax. The purpose of the present invention is to overcome the defects of the prior art and provide a method for preparing phase change wax by sweating and a sweating dish device with an external circulation heat-insulating water system used in the method.

The utility model relates to the field of molecular distillers, and discloses a molecular distiller for Fischer-Tropsch wax processing, which comprises a placing tank, the bottom of the placing tank is fixedly connected with a base, the bottom of the placing tank is communicated with a liquid discharge pipe, the outer wall of the liquid discharge pipe is provided with an electric water valve, the outlet of the liquid discharge pipe is communicated with a diffusion pump, and the diffusion pump is communicated with a water outlet of the electric water valve. An air outlet pipe is communicated with the outer wall of the diffusion pump, a liquid storage cavity is formed in the placement tank and surrounds the liquid discharge pipe, a liquid inlet pipe penetrating out of the placement tank is communicated with the inner wall of the liquid storage cavity, and a sealing plug is hermetically inserted into an inlet of the liquid inlet pipe. The Fischer-Tropsch wax cooling device is easy to use, the remaining amount of liquid in the containing tank can be known by observing the height of the connecting rod, the characteristic that the cooling speed of heat conduction oil is low in the liquid storage cavity is utilized, the liquid drainage pipe is wrapped in the liquid storage cavity, and therefore the temperature in the containing tank and the temperature in the liquid drainage pipe can be maintained, and the problem that the Fischer-Tropsch wax cooling speed is too high is solved.