39results about How to "Low critical pressure" patented technology

The invention relates to a method for extracting grease from oil material, in particular to a method for extracting peony seed oil from peony seeds. The method for extracting peony seed oil from peony seeds is characterized by comprising the following steps of: (1) firstly, drying the peony seeds until the water content is smaller than 13%, and crushing to 40-80 meshes by using a crusher; (2) delivering the dried and crushed peony seeds into an extracting kettle, pumping the vacuum to the pressure below 1*10<4>Pa, and evacuating air in the extracting kettle; (3) then, pumping a tetrafluoroethane solution into the extracting kettle by using a plunger pump until the peony seeds are emerged under the liquid level under the observation of a sight glass; (4) stirring, and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature range is 40-50 DEG C, and the extraction time is 30-45 min each time; (5) depressurizing and raising temperature to evaporate and separate in a separating kettle, wherein the separation pressure range is 0.5-0.1MPa, and the temperature range is 45-50 DEG C; (6) after subcritical extraction, centrifugally separating and filtering the crude oil through a high-speed centrifuge to obtain the final peony seed oil.

The invention relates to a method for extracting grease from oil material, in particular to a method for extracting prickly ash seed oil from prickly ash seeds. The method for extracting prickly ash seed oil from prickly ash seeds is characterized by comprising the following steps of: (1) firstly, drying the prickly ash seeds until the water content is smaller than 13%, and crushing to 40-80 meshes by using a crusher; (2) delivering the dried and crushed prickly ash seeds into an extracting kettle, pumping the vacuum to the pressure below 1*10<4>Pa, and evacuating air in the extracting kettle; (3) then, pumping a tetrafluoroethane solution into the extracting kettle by using a plunger pump until the prickly ash seeds are emerged under the liquid level under the observation of a sight glass; (4) stirring, and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature range is 40-50 DEG C, and the extraction time is 30-45 min each time; (5) depressurizing and raising temperature to evaporate and separate in a separating kettle, wherein the separation pressure range is 0.5-0.1MPa, and the temperature range is 45-50 DEG C; and (6) after subcritical extraction, centrifugally separating and filtering the crude oil through a high-speed centrifuge to obtain the final prickly ash seed oil.

The invention relates to a method for extracting grease from oil seeds, in particular to a method for extracting and recycling olive pomace oil from olive pomace. The method is characterized by comprising the following steps of: (1) drying the olive pomace until the water content is less than 13%, and crushing to 40-80 meshes by a crusher; (2) putting the dried and crushed olive pomace into an extraction kettle, vacuumizing until the pressure is less than 1*10<4>pa, and discharging air in the extraction kettle; (3) injecting a tetrafluoroethane solution into the extraction kettle by a plunger pump until the level of the solution submerges raw materials of the olive pomace by using a sight glass for observation; (4) starting stirring and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature is 40-50 DEG C, and the extraction time is 45min; (5) decompressing, raising temperature, evaporating and separating in a separation kettle, wherein the extraction pressure is 0.1-0.5Mpa, and the temperature is 40-50 DEG C; and (6) after subcritical extraction, centrifuging to separate crude oil by a high-speed centrifuge, and filtering to obtain the final olive pomace oil.

The invention relates to a method of extracting bay leaf oil from bay leaves with subcritical n-butane fluid. The method includes smashing, adding into a tank, dipping with an n-butane solvent, extracting, distilling, and the like. Extraction temperature and pressure can be accurately controlled by utilization of a subcritical extraction device. The method is high in extraction efficiency, low in device manufacturing cost, high in raw material treating amount, simple in process, low in production cost and free of solvent residue. A whole process of the method is performed at low temperature under an oxygen-free state. Extraction and separation are performed at the same time. The extraction speed is high. Recovery and reutilization of the solvent can be achieved.

The invention discloses a method for preparing nutmeg oleoresin by using a subcritical fluid. The method comprises the following steps: pretreatment, vacuum-pumping, extraction, desolvation, product collection and residue processing. The method for preparing the nutmeg oleoresin by using the subcritical fluid can be carried out under medium temperature condition, an active substance in an oil material cannot be destroyed, so that local flavor of nutmeg can be completely kept, quality of the nutmeg is good, oil extraction rate is high, and problems of loss of the nutmeg oleoresin and oxidative deterioration due to high temperature can be solved. The method uses unique dissolving characteristic of butane to effective components of the nutmeg oleoresin, performs extraction and separation for the nutmeg oleoresin, realizes solvent recycling, and increases utilization rate of the raw material; at the same time, butane has low boiling point, strong dissolvability and low critical pressure, technological condition is mild, production equipment requirement is reduced, safety performance of the production equipment is enhanced, and the method is suitable for large scale production.

The invention relates to a method for extracting grease from oil material, in particular to a method for extracting tomato seed oil from tomato seeds. The method for extracting tomato seed oil from tomato seeds is characterized by comprising the following steps of: (1) firstly, drying the tomato seeds until the water content is smaller than 13%, and crushing to 40-80 meshes by using a crusher; (2) delivering the dried and crushed tomato seeds into an extracting kettle, pumping the vacuum to the pressure below to 1*10<4>Pa, and evacuating air in the extracting kettle; (3) then, pumping a tetrafluoroethane solution into the extracting kettle by using a plunger pump until the tomato seeds are emerged under the liquid level under the observation of a sight glass; (4) stirring, and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature range is 40-45DEG C, and the extraction time is 40-50min each time; (5) depressurizing and raising temperature to evaporate and separate in a separating kettle, wherein the separation pressure range is 0.5-0.1MPa, and the temperature range is 45-50DEG C; and (6) after subcritical extraction, centrifugally separating and filtering the crude oil through a high-speed centrifuge to obtain the final tomato seed oil.

An air conditioner of indirect solar energy is composed of light pipe receiver , energy accumulator , exchanger , four - way solenoid valve , condenser , evaporator , booster , pressure release gate valve , pressure release and charging valve , fan , relay control panel and transfusion pipe . It features connecting light pipe receiver to energy accumulator in parallel for forming energy receiver outdoor, setting exchanger connected respectively with condenser and four - way solenoid valve at top and bottom in energy accumulator and connecting evaporator to condenser and four - way solenoid valve separately through transfusion pipe.

The invention discloses an explosion-proof fuel tank for a parallel-connection multi-chamber motorcycle. According to the scheme, the explosion-proof fuel tank comprises a tank body, wherein a fuel tank cap is arranged on the tank body; a closed cavity is formed in the tank body; a spacing piece is mounted on the wall surface of the cavity, and critical pressure of the spacing piece is lower than critical pressure when the cavity wall is broken; a safety valve is further mounted on the wall surface of the cavity, and critical pressure of the safety valve is lower than that of the spacing piece; a plurality of partition boards are arranged in the cavity and divide the cavity into a plurality of chambers; bursting discs are arranged on the partition boards, critical pressure of each bursting disc is higher than critical pressure of the safety valve and lower than critical pressure when the cavity wall is broken; the cavity is further provided with a through hole communicated with outside, a sealing cover is mounted at the through hole, and the safety valve, the through hole and the spacing piece are arranged on the wall surface of the same chamber. According to the explosion-proof fuel tank for the parallel-connection multi-chamber motorcycle, the tank body can be repeatedly subjected to pressure reduction by the aid of the cavity.

The invention discloses a battery fire extinguisher achieving fire extinguishment with hexafluoropropane and carbon dioxide. The battery fire extinguisher comprises a fire extinguishment bottle installed outside a battery box, wherein a vehicle-mounted battery is fixedly arranged in the battery box, a spray pipe of the fire extinguishment bottle is arranged in the battery box, the fire extinguishment bottle is filled with fire extinguishment materials which are intermixtures formed by the hexafluoropropane and the carbon dioxide, both the hexafluoropropane and the carbon dioxide are of a liquid state, the hexafluoropropane accounts for 15%-18% of the intermixtures (by volume), and the balance is the carbon dioxide. The battery fire extinguisher has the advantages of being capable of conducting physical fire extinguishment and chemical fire extinguishment simultaneously.

The invention provides a flame retardant high iron seat cover. The cover comprises a backrest pocket and a base pocket connected with the backrest pocket; the backrest pocket and the base pocket are made from a composite fabric, and the composite fabric is formed by weaving a composite fiber, a polyester yarn and flame retardant polyester threads according to a ratio of 1:2:3; the composite fibercomprises a flame retardant fiber main part and an outer surface layer disposed outside the flame retardant fiber main part; the flame retardant fiber main part comprises a pair of side-by-side arranged flame retardant polyester threads and a pair of sleeves, the middles of the pair of flame retardant polyester threads are adhered to tapered metal fixing pieces, and the left and right sides of themetal fixing pieces are provided with arc curved surfaces for fixing the flame retardant polyester threads; the upper and lower ends of the middle of a metal fixing piece are respectively provided with puncture portions; the pair of sleeves respectively directly face the puncture portions of the upper and lower ends, and the two sides of the sleeves are in contact with the flame retardant polyester threads; the sleeves are filled with a pressurized gas fire extinguishing agent; the outer surface layer and the sleeves are both made from a flame retardant thermoplastic resin. The cover solves the problem that an existing high iron seat cover has a poor flame retarding effect.

The invention discloses an environment-friendly antibacterial foreign language translation machine material and a preparation method thereof. The material comprises antibacterial nano Ag particle loaded microporous structure chitosan/polylactic acid. The preparation method comprises the following steps: mixing a chitosan solution with a silver nitrate solution, and carrying out visible light irradiation and electrostatic spinning processes to obtain chitosan antibacterial fibers loaded with nano Ag particles; polylactic acid is heated and melted, and a hollow polylactic acid wire is extruded; importing the three-dimensional model of the foreign language translator into a fused deposition modeling device for layering and slicing; the preparation method comprises the following steps: putting the chitosan antibacterial fiber into a hollow polylactic acid wire hole, heating and melting into a melt, introducing critical inert gas, maintaining pressure, dissolving the inert gas into the melt, carrying out fused deposition on the melt to form a foreign language translation machine structure, and carrying out in-situ microcellular foaming to form a microcellular structure in the processes of room-temperature cooling solidification and pressure release. The preparation of the environment-friendly degradable long-acting antibacterial foreign language translator material is realized, and the application prospect is wide.