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48results about How to "Increase the amount of preparation" patented technology

Method for preparing porous covalent organic material by using ultra-gravity method

ActiveCN105199082ASecure Response EnvironmentIncrease mass transfer rateReaction rateOxygen
The invention discloses a method for preparing a porous covalent organic material by using the ultra-gravity method, and belongs to the technical field of preparation of porous covalent organic materials. The method comprises the following steps: under a high gravity field, the micromixing and mass transferring process is strengthened, materials in a cavity of a preferable over-gravity rotary bed are sucked into a rotor of the rotary bed through a rotating inner spiral pipe, and the materials are sheared by, mixed and reacted with a filler rotating at a high speed in the rotor. Compared with reaction under a normal gravity filed, the method is greatly increased in reaction rate, and shortened in reaction time; besides, as for reaction systems sensitive to air, the water-free and oxygen-free reaction condition can also be achieved without a glove box, and compared with low-dosage preparation in the glove box, the method is greater in preparation amount and higher in production efficiency.
Owner:BEIJING UNIV OF CHEM TECH

Wind prevention, sand fixation and water retention afforestation method

The invention discloses a wind prevention, sand fixation and water retention afforestation method and belongs to the technical field of environmental protection engineering. The method comprises steps as follows: a curing agent is prepared from sodium carboxymethylcellulose, anionic polyacrylamide, ferrous chloride and water; the curing agent and sand are blended to form cured sand; deep holes for tree planting and shallow trenches for grass planting are dug in the sand land, water collecting hoppers are drilled in the deep holes, the deep holes and the shallow trenches are filled with the cured sand, and the cured sand form deep hole sand fixation and water absorption layers in the deep holes and form shallow trench sand fixation and water absorption layers in the shallow trenches; saplings are planted in the deep holes, the roots of the saplings extend into the mouth parts of the water collecting hoppers, and grass seeds are scattered in the deep holes and the shallow trenches; the grass seeds are covered with a mulching film for maintenance, and small ventilation holes are formed in the mulching film. The curing agent and the sand soil are blended, inside gaps of soil particles can be filled with the blended curing agent and sand soil, the cured sand particles don't easily disperse and jump, sufficient water can be continuously provided for plants, and the long-time wind prevention, sand fixation and water retention effects are achieved.
Owner:裴向军 +1

Method for preparing two main anthocyanin standard substances of vitis davidii

The invention discloses a method for preparing two main anthocyanin standard substances in cloudy juice of vitis davidii by utilizing high-speed counter-current chromatography. The method comprises the following steps: enriching the cloudy juice of vitis davidii by adopting a macroporous resin, eluting with ethanol, performing freeze drying to obtain a crude sample, performing high-speed counter-current separation on the crude sample with water in a solvent system, and separating to prepare anthocyanin standard substances, wherein the anthocyanin standard substances are respectively malvidin-[3-O-glucose-]-[5-O-glucose] with purity of 95.8% and malvidin-[3-O-beta-glucosyl-6-coumaroyl]-[5-O-beta-D-glucose] with purity of 92.2%. The yield of the two anthocyanin standards prepared from the cloudy juice of vitis davidii is respectively 122.77mg / L and 78.09 mg / L. A method for separating anthocyanin and polyphenol in the cloudy juice of vitis davidii by high-speed counter-current chromatography is established, and the method for preparing high-purity standard substances can meet large-scale preparation of natural anthocyanin of the vitis davidii.
Owner:HUNAN AGRICULTURAL UNIV

Thin film photovoltaic structure and fabrication

Novel photovoltaic structures comprising an insulator structure bonded to an exfoliation layer, preferably of a substantially single-crystal donor semiconductor wafer, and at least one photovoltaic device layer, such as a conductive layer, and systems and methods of production of a photovoltaic device, comprising creating on a donor semiconductor wafer an exfoliation layer and transferring the exfoliation layer to an insulator substrate.
Owner:CORNING INC

Method for quickly separating and preparing high-purity deoxyrhapontin and rhapontin

The invention relates to a method for quickly separating and preparing high-purity deoxyrhapontin and rhapontin. The method comprises the following steps of: (1) cutting or grinding the dry root or rhizome of the wild or cultivated rhubarb plant to obtain the extraction raw material; (2) performing alcohol extraction and drying of the extraction raw material to obtain an extract; (3) mixing four solvents of methanol, water, n-butyl alcohol and chloroform; shaking, standing for layering and collecting the upper-phase solvent and the lower-phase solvent; and performing ultrasonic treatment of the upper-phase solvent and the lower-phase solvent to obtain a stationary phase and a mobile phase; (4) dissolving the extract in the mobile phase to obtain a sample injection solution; (5) sequentially pumping the stationary phase and the mobile phase into a separation tube of a high-speed counter-current chromatographic apparatus, and injecting the sample injection solution into a sample injection ring of the high-speed counter-current chromatographic apparatus; (6) collecting the effluent liquid A in the time range from 70min to 100min, and drying the effluent liquid A to obtain deoxyrhapontin; (7) reversely rotating the separation tube; and (8) collecting the effluent liquid B in the time range from 400min to 450min, and drying the effluent liquid B to obtain rhapontin. The method provided by the invention is simple to operate and facilitates the industrial production.
Owner:PUREDIA LTD

Flying Apparatus

This invention provides a small lightweight glider that is hollow and made from a molded thin film material. Typically the glider is formed in the shape of a bird or a plane. The body of the glider comprises top half and a lower half, which form a hollow fuselage, a left wing and a right wing extending laterally from the fuselage. The glider also comprises a ballast weight, a stiffener, and optionally an interior skeleton. The interior of the glider is open to the outside atmosphere and requires no inflation.
Owner:HOWARD DAVID

Production method and use of natural tremella polysaccharide

The invention discloses a production method of natural tremella polysaccharide, wherein the production method comprises the following steps: selecting dry pest-free and non-toxic tremella, and crushing for standby application; adding distilled water into a container containing the dry tremella, extracting, adjusting the pH to 9.0 or more with an alkali, and extracting for 24-28 h at room temperature; after completion of the extraction, adding cation resin, washing, and adjusting the pH to 7.0 or less; next, intercepting high-molecular-weight impurities with an ultrafiltration film; concentrating the filtrate with a single-effect concentrator to the proportion of 1:3-1:5; carrying out alcohol precipitation of the concentrated liquid with ethyl alcohol, stirring for 1-2 h, and allowing to stand for 12-18 h; then using a plate type filter press, and collecting a white solid, namely the tremella polysaccharide. The invention also discloses an application of the natural tremella polysaccharide in production of cosmetic raw materials. The natural tremella polysaccharide has excellent antioxidant property; compared with ordinary tremella polysaccharide, although the final concentrations of the tremella polysaccharides are the same, the natural tremella polysaccharide has more excellent antioxidant property and has the effect of preventing skin aging.
Owner:BIOLAND BIOCHEM HAIMEN CO LTD

Wastewater treatment method in kitchen waste recycling treatment process

The invention relates to a wastewater treatment method in a kitchen waste recycling treatment process. The wastewater treatment method comprises the following steps: storing wastewater, separating and filtering for the first time; heating, separating for the second time; removing sludge; dehydrating; filtering for the second time; and storing effluent. According to the wastewater treatment method in the kitchen waste recycling treatment process, certain microbes which cannot be filtered can be heated and filtered, so that the cleanness degree of drained clear water can reach an ideal standard and has the effect of preventing secondary environmental pollution.
Owner:(株)新海ECOTECH

4-iodophenyl substituted carborane derivative and preparation method thereof

The invention discloses a 4-iodophenyl carborane derivative and a preparation method thereof. Commercialized organic reagents 4-iodoaniline and a diacetonitrile decaborate complex and several easily-synthesized substituted alkynes are adopted as the starting raw materials, carrying out diazotization reaction, Sonogashira coupling reaction, iodine exchange and alkyne addition reaction are carried out to form a series of 4-iodophenyl carborane with different substituent groups. The preparation method provided by the invention has the advantages of strong group applicability, easy purification and separation, high synthesis yield and high reference value.
Owner:YANCHENG INST OF TECH

Automatic glue preparation device

The invention discloses an automatic glue preparation device, which includes a weighing system, a stirring system, a subpackaging system and a mixing barrel. The weighing system comprises an electronic balance and a display connected by a signal line. The stirring system comprises a working platform and a support column, an upper displacement restrictor, a middle displacement restrictor and a lower displacement restrictor are installed on the right side wall of the support column from top to bottom, a barrel body fixation frame is mounted at the middle part of the left side wall, and an air cylinder is mounted above the support column. A mobile platform is mounted above the air cylinder, the upper end of a fixation rod is fixed to the lower undersurface of the mobile platform, two groups of mobile rods are fixed on a barrel cover, and the upper ends of the mobile rods are fixed to fixed to the lower undersurface of the mobile platform, the barrel cover is communicated with the ventilation port of a ventilation system, one ends of stirring blades and a stirring frame are all fixed to the lower undersurface of the mobile platform, and the other ends all pass through the barrel cover. The subpackaging system consists of a material splitting barrel cover and a pneumatic pump set. The automatic glue preparation device provided by the invention realizes the functions of automatic weighing, mixing and subpackaging of glue solution, and guarantees mixing uniformity and consistency.
Owner:中国原子能工业有限公司

Bubble blowing device

The invention discloses a bubble blowing device. The device comprises a supporting assembly and bubble generating members, wherein the bubble generating members are provided with multiple bubble generating holes, and the bubble generating members are fixed on the supporting assembly. The device is provided with the bubble generating members with porous structures, a large number of bubbles can begenerated simultaneously to facilitate the inspiring of game interestingness of children to improve user experience, and the development of industries is promoted; the overall bubble blowing device can be folded due to the foldable bubble generating members, and a user can accommodate and carry the bubble blowing device conveniently; a sector bone is connected with the bubble generating members toimprove the stability when the bubble generating members are spread and prevent the clamping among the bubble generating members, and the bubble generating members are conveniently and rapidly spreadand folded.
Owner:KADE LTD

Extrusion forming device for manufacturing of hardware accessories

The invention discloses an extrusion forming device for manufacturing of hardware accessories. The extrusion forming device comprises a base, wherein the top of the base is fixedly connected with a stand column; the top of the stand column is fixedly connected with a top plate; a pushing box is fixedly mounted at the top of the base and located on the right side of the stand column; the middle of the stand column is fixedly connected with an operation panel; an extrusion groove is formed in the top of the operation panel; a moving plate is arranged in the extrusion groove; the surface of the moving plate is movably connected with the inner wall of the extrusion groove; a hardware accessory blank is arranged at the top of the moving plate, and the bottom of the moving plate is fixedly connected with one end of a pushing rod; the other end of the pushing rod penetrates through the operation panel and extends into the pushing box. With the adoption of the extrusion forming device for manufacturing of the hardware accessories, the operation difficulty in taking the hardware accessory blank is reduced for a user, time spent in taking the hardware accessory blank is shortened, the manufacturing efficiency of the hardware accessories is improved, the manufacturing quantity is increased, the adaptability is high, and the reliability is high.
Owner:NANTONG HANGTAI MARINE MACHINERY CO LTD

Method for producing electroplating-grade copper oxide by utilizing acidic etching waste liquid

The invention discloses a method for producing electroplating-grade copper oxide by using acidic etching waste liquid, which comprises the following steps: arranging a rotatable reaction cylinder, carrying out rotary support through a support frame, installing a lifting scraping disc capable of sliding up and down in the reaction cylinder, and installing a precision filter screen in the lifting scraping disc, after the lifting scraping disc is inserted into the bottom of the reaction cylinder, introducing filtered and impurity-removed acidic etching liquid into the reaction cylinder for preparation treatment, gradually adding an oxidizing agent into the reaction cylinder to oxidize free copper ions in the acidic etching liquid, and driving the reaction cylinder by an external motor to slowly rotate. By arranging the rotatable reaction cylinder, solution reaction is accelerated by controlling the reaction cylinder to rotate slowly, small flocculent precipitate can be attached to the inner wall of the reaction cylinder under the action of centrifugal force by controlling the reaction cylinder to rotate at a high speed, and the precipitate can be brought out upwards by pulling the lifting scraping disc upwards slowly; the sediment collection efficiency is greatly improved.
Owner:深圳市祺鑫环保科技有限公司

Device for preparing nickel-plating solution

The invention discloses a device for preparing a nickel-plating solution. The device comprises a liquid preparation barrel, a nickel group feeding hole, a water inlet pipeline, a liquid storage barrel and the like. The device is characterized in that a liquid preparation circulating pump is arranged on the liquid preparation barrel; a liquid storage circulating pump and a nickel-plating solution output pipeline are arranged on the liquid storage barrel; extracting pumps are also arranged on the liquid preparation barrel and the liquid storage barrel. The device has the beneficial effects that automation of preparation, storage and transportation of the nickel-plating solution is achieved by using three electric mechanical pumps; the production efficiency is greatly improved. Large-volume liquid preparation and storage barrels are utilized, so that the preparation quantity of the nickel-plating solution is increased; the field efficiency is improved; the device is simple and practical in structure.
Owner:SHANDONG KEXIN ELECTRONICS

Preparation method and application of adipose-derived mesenchymal stem cell exosome

The invention provides a preparation method and an application of an adipose-derived mesenchymal stem cell exosome. The preparation method of the adipose-derived mesenchymal stem cell exosome is characterized in that the preparation method at least includes the following steps: (1) diluting adipose-derived mesenchymal stem cells and extruding to obtain an extrusion liquid; (2) placing the extrusion liquid into a gradient separation liquid for centrifugation, and reducing speed without braking to obtain a layered mixed liquid, wherein the layered mixed liquid comprises an upper layer component,an intermediate layer component and a lower layer component; and (3) collecting the intermediate layer component, mixing with adipose-derived mesenchymal stem cell exosome, and centrifuging to obtaina precipitate which is the adipose-derived mesenchymal stem cell exosome. The preparation amount of the exosome prepared by the preparation method of the adipose-derived mesenchymal stem cell exosomeis much higher than that of the traditional exosome; and the exosome has a better liver disease treatment effect.
Owner:ZHEJIANG UNIV

Sandy soil greening construction method

The invention discloses a sandy soil greening construction method, and belongs to the environment protection engineering technical field; the method comprises the following steps: preparing a curing agent; mixing the curing agent with sandy soil so as to form curing sand; digging deep pits and shallow trenches in the sandy soil, drilling water funnels into the deep pits, filling the curing sand into the deep pits and shallow trenches, planting saplings into the deep pits, allowing sapling roots to extend to the water funnel mouths, and spreading grass seeds in the deep pits and shallow trenches; laying fine sands on the grass seeds, using a mulch film to cover the grass seeds, opening vents on the mulch film, inserting wooden slots around the mulch film, and pouring slurry into the slots so as to form a water fence; watering the grass seeds for maintenance, and irrigating in every 1-2 days until the grass seeds germinate. The method mixes the curing agent with the sandy soil so as to fill inner gaps of the soil particles; the curing sand particles cannot easily disperse and jump, thus contentiously providing sufficient water for plants, and realizing long term windproof, sand solidification, water retention and greening effects.
Owner:裴向军 +1

Preparation method of amygdalin

The invention discloses a method for preparing amygdalin, comprising the following steps: S1, preparation of an extract: fetching a bitter apricot kernel medicinal material as a raw material, crushing and sieving, carrying out enzyme deactivation, degreasing, filtering and fetching filter residue, dissolving with alcohol, carrying out ultrasonic extraction, filtering, and concentrating a filtrate to obtain an extract mainly containing amygdalin; S2, normal phase column chromatographic separation: using ethyl acetate-methanol as an elution solvent and using silica gel as a filling material and carrying out normal phase column chromatographic separation on the extract of amygdalin, collecting the elution solvent containing amygdalin, and carrying out reduced pressure distillation to obtain an amygdalin crude product; and S3, high-speed counter-current chromatographic purification: using ethyl acetate-n butanol-water as a solvent system, and carrying out high-speed counter-current chromatographic purification on amygdalin. By the above preparation method, purity of the prepared amygdalin is high, and one-time preparation amount is large. There is no influence on activity of the sample, and there is no additional pollution. The product can be applied to medicines, cosmetic, health products and the like.
Owner:UNO SCI CO LTD

Preparation system and method based on disinfectant fluid

The invention provides a preparation system and method based on disinfectant fluid. The preparation system based on disinfectant fluid comprises a purified water preparation unit, an electrolysis unitwhich is connected to the output end of the purified water preparation unit, an electrolyte filling unit which is connected to the output end of the electrolysis unit, and a split charging unit whichis connected to the output end of the electrolyte filling unit. According to the preparation system and method based on disinfectant fluid, through arranging the purified water preparation unit, filtration treatment of tap water is carried out, impurities and bacteria contained in the electrolyte are completely treated, purified water meeting the production standard is prepared, tap water in a traditional preparation system is replaced, the electrolyte is prevented from being polluted in the electrolysis process, meanwhile, the utilization rate of the electrolyte is increased, the electrolytedoes not need to be frequently added again, and consumption of the electrolyte is reduced.
Owner:水一人科技发展有限责任公司

Spray type Hong Kong-style milk tea making machine

The invention discloses a spray type Hong Kong-style milk tea making machine. The spray type Hong Kong-style milk tea making machine comprises a machine body, a master control module, an inner drum, aheating pipe, a water pump, a spray module, a bracket, a water level sensing module, an overheat protection module, a time control module, a thermal insulation sheet, a temperature detection module and an indication module. By means of cooperation of the water pump and a spray pipe, hot water is extracted from low position to high position for spraying, after milk tea is prepared, the hot water flows back automatically, the process is cycled, and taste of the milk tea is improved; by means of the water level sensing module, when the amount of the milk tea in the drum is too small, alarming can be performed, and dry burning is avoided; when the temperature of the heating pipe is overhigh, the overheat protection module can perform automatic sensing and cuts off a power supply of the heating pipe, and accidents are prevented; the time control module can control making time of different types of milk tea; temperature of the milk tea can be kept by the thermal insulation sheet; the temperature detection module can detect the temperature of the milk tea in real time; the indication module can display working conditions of corresponding functions in real time.
Owner:江门奇沛酒店设备有限公司

Planetary multi-layer helix-tube centrifugal distribution chromatograph separation apparatus

Separating unit of chromatograph comprises following parts and steps: solvent system for preparing component stationary phase, mobile phase; pumping prepared stationary phase or pressing it in air pressure mode to working drum of main unit and filling up the drum with the stationary phase; running the main unit and pumping soluble crude extract of camptothecin in prearranged flux and mobile phase; based on detected spectrogram, collecting monomolecular camptothecin component from mobile phase. The two-phase solvent system is composed of hydrocarbon alkylogen, fatty alcohol and water or buffer solution of potassium phosphate under normal temperature and pressure. Upper phase is stationary phase and lower phase is mobile phase. Features of the invention are: easy of operation, small capacity of organic solvent, high efficiency. Content of product of pure monomolecular camptothecin is as high as 98%.
Owner:ZHEJIANG UNIV

Method for separating and purifying desacetyl asperulosidic acid methyl ester

The invention relates to a method for separating and purifying desacetyl asperulosidic acid methyl ester by using a semipreparative high-speed countercurrent chromatograph. The method is characterized in that a solvent system is composed of n-heptane, dichloromethane, methanol and water; the solvent system is placed in a separating funnel and sufficiently shaken and then stands still for layering, the upper phase is used as a stationary phase, and the lower phase is used as a mobile phase; and herba oldenlandiae crude extract is dissolved in the lower-phase solution to prepare into a sample solution, the sample solution is detected by the high-speed countercurrent chromatograph and an ultraviolet spectrograph, fraction is collected according to the chromatographic peak, concentrated and dried to finally obtain high-purity desacetyl asperulosidic acid methyl ester. The method has the advantages that solid filler is not used; irreversible adsorption is not existed; a large amount of desacetyl asperulosidic acid methyl ester can be separated efficiently and rapidly by the method; the preparation process is simple and easy to operate; and the purification efficiency is high, thereby laying a solid foundation for extraction and utilization of active ingredients in herba oldenlandiae.
Owner:NANJING ZELANG MEDICAL TECH

Method for extracting and preparing resistant starch from Chinese yam and prepared resistant starch

The invention belongs to the technical field of agricultural product processing, and particularly relates to a method for extracting and preparing resistant starch from Chinese yam and the prepared resistant starch. The method for extracting and preparing the resistant starch from the Chinese yam comprises the following steps: firstly extracting starch from Chinese yam, mixing and stirring the extracted Chinese yam starch with lipid compounds at a temperature lower than 0 DEG C, and then removing fast digested starch and slow digested starch components from the stirred product to obtain the resistant starch. The method is simple to operate; in the step of extracting yam starch, normal temperature is adopted for extraction, so that the method is mild and efficient, and the morphology of theyam starch is not excessively damaged; meanwhile, when the resistant starch is obtained from the yam starch, two stages of low temperature are creatively utilized to allow lipid substances and RDS and SDS starch, in particular the RDS starch to be reacted and converted to have the characteristics of the resistant starch, so that the preparation amount of the resistant starch is improved.
Owner:HENAN UNIV OF ANIMAL HUSBANDRY & ECONOMY +1

Mixing system for improving solid-liquid-gas mixing performance

The invention discloses a mixing system for improving solid-liquid-gas mixing performance. The mixing system comprises a gas-solid ejector, a solid-liquid mixing ejector and a powder-gas conveying pipe connected between the outlet end of the gas-solid ejector and the powder-gas inlet end of the solid-liquid mixing ejector. The solid-liquid mixing ejector is higher than the gas-solid ejector; the gas-solid ejector is used for introducing a powder-gas mixture obtained by mixing the high-speed gas flow and the dry powder into the powder-gas conveying pipe; the liquid inlet end of the solid-liquidmixing ejector is used for introducing liquid with certain pressure, negative pressure is formed in the solid-liquid mixing ejector through flowing of the liquid, and the powder-gas mixture in the powder-gas conveying pipe is sucked into the solid-liquid mixing ejector to be mixed with the liquid. According to the mixing system, the suction range of a powder-gas mixture can be increased to 7 m, meanwhile, the dry powder adding amount in unit time can be increased, the single polymer solution preparation amount is increased, and accurate preparation of the concentration of a polymer solution and preparation of the polymer solution with the high concentration are facilitated.
Owner:大庆德美特尔能源科技有限公司

Agar culture medium preparation system

The invention discloses an agar culture medium preparation system which comprises a blending tank device (1), a water tank (2) and a pipeline system, wherein the pipeline system comprises a first water path pipeline (3), a second water path pipeline (4), a medium supply pipeline (5) and a blowdown pipeline (6). The agar culture medium preparation system disclosed by the invention is low in investment cost, good in use effect and high in agar culture medium preparation amount (capacity).
Owner:JIANGSU YIMA BIOLOGICAL TECH

Method for enhanced nitrogen removal by utilizing constructed wetland blockages

The invention discloses a method for enhanced nitrogen removal by utilizing constructed wetland blockages. The method comprises the following steps: recovering the blockages of a constructed wetland; preparing aged and withered plants, and drying; mixing the blockages of the constructed wetland and the aged and the withered plants, performing anaerobic fermentation after a mixture is pre-treated by utilizing strong alkali liquid, recycling supernatant fermenting liquid, and measuring COD (Chemical Oxygen Demand) Cr content and the total nitrogen content of the supernatant fermenting liquid; taking the fermenting liquid as a carbon source, adding the fermenting liquid into inlet water of the constructed wetland according to the proportion of the CODCr to N of the fermenting liquid of 4 to 8, and performing nitrogen removal treatment of the constructed wetland. By adopting the technical scheme of the invention, the nitrogen removal rate of low-carbon high-nitrogen sewage can be improved; the weight reduction treatment of waste of the constructed wetland can also be realized; the problem that the blockages affect long-term high-efficiency operation of the constructed wetland is solved; the secondary pollution is low; a biological denitrification nitrogen removal effect is good; the utilization rate of the blockages serving as regenerative resources is improved.
Owner:SHENZHEN UNIV

Polymer preparation system of offshore platform without curing tank

The invention discloses a polymer preparation system of an offshore platform without a curing tank. The system comprises a dispersing and mixing system, a first conveying pump, a polymer forced stretching device, a buffer stirring tank, a second conveying pump, a mother liquid diluting system and a target liquid storage tank which are connected in sequence; the dispersing and mixing system comprises a trough, a spiral feeder, an air blower, an ejector, a water feeding pump I and a mixing, dissolving and stirring tank; a discharging port of the material groove is connected with a feeding port of the spiral feeder, a discharging port of the spiral feeder is connected with a first inlet of the ejector, the output end of the air blower is connected with a second inlet of the ejector, and an outlet of the ejector and the output end of the first water feeding pump are connected with a mixing, dissolving and stirring tank; the mother liquor diluting system comprises a mother liquor diluting tank and a second water feeding pump which are connected with each other. On the premise that the number of the curing tanks is not increased, the preparation concentration is improved, the dissolution time is shortened, and technical support is provided for polymer preparation of the offshore platform.
Owner:SOUTHWEST PETROLEUM UNIV
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