12721 results about "Centrifugal separation" patented technology

The PRP separator-concentrator of this invention is suitable for office use or emergency use for trauma victims. The PRP separator comprises a motorized centrifugal separation assembly, and a concentrator assembly. The centrifugal separator assembly comprises a centrifugal drum separator that includes an erythrocyte capture module and a motor having a drive axis connected to the centrifugal drum separator. The concentrator assembly comprises a water-removal module for preparing PRP concentrate. The centrifugal drum separator has an erythrocyte trap. The water removal module can be a syringe device with water absorbing beads or it can be a pump-hollow fiber cartridge assembly. The hollow fibers are membranes with pores that allow the flow of water through the fiber membrane while excluding flow of clotting factors useful for sealing and adhering tissue and growth factors helpful for healing while avoiding activation of platelets and disruption of any trace erythrocytes present in the PRP.

The invention discloses a method for producing humic acid and salt thereof through the oxidative degradation of young lignite. The method comprises the following steps: carrying out the oxidation reaction of the lignite containing the humic acid and aqueous hydrogen peroxide solution; after the reaction, obtaining water soluble fulvic acid through centrifugal separation, supernatant filtration, concentration and drying; adding alkali into the fulvic acid to prepare a fulvic acid salt product; carrying out the alkaline extraction and centrifugal separation of the residue deposit of the production of the fulvic acid, adding acid into the supernatant till the pH value is 1 to 2, carrying out a reaction at an increased temperature or room temperature, carrying out centrifugal separation after the reaction is finished, and obtaining purified ulmic acid after precipitation and drying; and directly concentrating and drying the supernatant in the previous step to obtain the humate. The method can improve the yield of the fulvic acid and total humic acid in the young lignite, and simultaneously increase the active group in the humic acid. The method can be used for producing fulvic acid, fulvic acid salt, ulmic acid and ulmic acid salt products. In particular, the method puts an end to the environmental pollution caused by the nitric acid which is taken as an oxidation degradation agent. In addition, the method has a short technological line, low cost, simple requirements on equipment, and moderate conditions. The method which can be applied to the industrialized production has good application prospect.

A Plasma or serum separation membrane that enables omitting centrifugal separation, is free from hemolysis attributed to destruction of red blood cells and realizes easy and rapid separation of plasma or serum from blood; and a filter apparatus including the plasma or serum separation membrane. In particular, a plasma or serum separation membrane being a membrane for separation of plasma or serum from blood and having a void ratio of 30% or below; and a filter apparatus comprising a filter member capable of attaining movement of plasma swifter than movement of blood cells and a plasma or serum separation membrane connected in series with a rear side of the filter member.

The invention relates to a method for producing copper chloride hydroxide and blue vitriod by using cupriferous etching wastewater; the method comprises the following steps: acidic copper chloride etching wastewater and alkaline copper chloride etching wastewater are neutralized and crystallized to get acidic copper chloride crystal under the condition of strictly controlling filling liquid and the Ph range of a reaction kettle, and then pumped and filtrated, and centrifugated; part of the obtained alkaline copper chloride crystal is dried to obtain finished products while the other is added with NaOH solution for alkali conversion to obtain copper oxide, and then is acidulated by sulphuric acid, crystallized, washed, centrifugated, and dried to obtain blue vitriod products. The method for producing blue vitriod by directly using sulphuric acid-oxyful etching wastewater includes the following steps: sulphuric acid-oxyful etching wastewater and composition brass wasterwater in a PCB manufacture are blended together and added with NaOH to form cupric hydroxide precipitation which filtrated, washed, and then acidulated by sulphuric acid to obtain copper sulphate solution; after the copper sulphate solution is cooled, crystallized, centrifugated and dried, and the blue vitriod is obtained.

The invention discloses a quick and efficient synthesis method for silver nanowires. The method comprises the following steps of: 1) introducing inert gas into a reactor, adding 2 volume parts of glycol into the reactor, and stirring, heating, condensing and refluxing the glycol; quickly adding 1 volume part of glycol solution of silver nitrate at molar concentration of between 0.1 and 0.5m into the reactor; slowly dropwise adding 1 to 2 volume parts of PVP at molar concentration of between 0.15 and 0.75m and 4 to 32 mu m of glycol solution of MnCl2 at the same time; and reacting and cooling the mixture to the room temperature to obtain reaction mother liquor of the silver nanowires; and 2) transferring the reaction mother liquor of the silver nanowires into a centrifugal tube; adding acetone into the centrifugal tube and performing centrifugal separation to remove supernatant and retain precipitate; adding de-ionized water or ethanol into the centrifugal tube and performing centrifugal separation to remove the supernatant and retain precipitate, and repeating the operation for 1 to 3 times; and extracting and dispersing the precipitate with ethanol to obtain the silver nanowires. The method shortens the reaction time and also has high selectivity for the synthesis of the silver nanowires under conditions of high concentration.

The invention provides an oily sludge recycling and innocent comprehensive treatment process, which comprises the following four steps of: 1, pretreating oily sludge: adding water into the oil sludge, heating and stirring to form fluidized sludge, and separating in a stainless steel screen; 2, conditioning the oily sludge, adding a demulsifier and a flocculant into the separated fluidized sludge for conditioning the oily sludge; 3, performing centrifugal separation on three phases of the oily sludge: introducing separated oil into an oil-water separation system for recovering crude oil, conveying separated water to the oily sludge pretreatment step for recycling, drying the separated residual oily sludge, and solid impurities and floating slag which are separated in the oily sludge pretreatment, and introducing the dried substances into a rotary kiln incinerator; and 4, performing mixed combustion on the residual oily sludge and biomass, performing high temperature incineration treatment after the residual oily sludge, the separated solid impurities and floating slag, and the biomass are mixed in a rotary kiln to remove the secondary pollution of the oily sludge, and recovering afterheat from high temperature flue gas.

The invention provides a preparation method of dispersible silane functionalized graphene. The method comprises the steps of: conducting ultrasonic dispersion to graphene oxide in absolute ethyl alcohol so as to form a uniform graphene oxide dispersion solution, then adjusting the pH value to 3-4, or under the protection of an inert atmosphere, adding silane into the dispersing solution for modification, with silane and graphene oxide in a mass ratio of 0.1:1-5:1, continuing the reaction for 12h-48h at a temperature ranging from normal temperature to 78DEG C, carrying out centrifugation, then adding hydrazine hydrate to the obtained solid, performing heating reduction, and filtering the reaction solution, then washing and drying the filter cake, thus obtaining dispersible silane functionalized grapheme. The method of the invention is simple and practicable, and the obtained silane functionalized grapheme has good dispersibility in solvents like absolute ethyl alcohol, acetone, toluene, ethyl acetate, butyl acetate, and tetrahydrofuran (THF), etc.

The invention relates to a method for removing heavy metal ions in water by using a graphene oxide sheet, which belongs to the technical fields of water purification and environmental protection. In the invention, the graphene oxide sheet is used as an adsorbent of the heavy metal ions, wherein the graphene oxide sheet is of a monatomic layer two-dimensional structure and has a huge specific surface while ensuring no obvious toxicity. In the purification process of the method, the operations are simple without pollution, and the copper ion adsorption efficiency is 10 times that of the active carbon. In the invention, the graphene oxide sheet adsorbing the metal ions can be recovered to the single sheet structure by a centrifugal separation or dialysis method and can be recycled.

An apparatus and method are provided for separating components of a fluid or particles. A separation vessel having a barrier dam is provided to initially separate an intermediate density components of a fluid, and a fluid chamber is provided to further separate these intermediate density components by forming an elutriative field or saturated fluidized particle bed. The separation vessel includes a shield for limiting flow into the fluid chamber of relatively high density substances, such as red blood cells. The separation vessel also includes a trap dam with a smooth, gradually sloped downstream section for reducing mixing of substances. Structure is also provided for adding additional plasma to platelets and plasma flowing from the fluid chamber. The system reduces clumping of platelets by limiting contact between the platelets and walls of the separation vessel.

Cleaning assemblies and particulate tolerant fluid bearings that are particularly well suited for use in centrifugal separation enhanced filtration devices are described. In one aspect of the invention, at least one bearing is arranged to carry a circulating cleaning assembly such that the cleaning assembly can rotate around a filter membrane during filtering operation of the filtration device. The bearing is preferably arranged to maintain the circulating cleaning assembly in a substantially coaxial alignment with the filter membrane and in a substantially stable longitudinal position relative to the filter membrane as the circulating cleaning assembly is rotated around the filter membrane. In another aspect of the invention a variety of particulate tolerant bearings are described.

A method has been invented for separating components of a wastewater stream, the stream containing water, oil (e.g. heavy oil and/or light oil), undesirable organic material (solid and/or liquid), and contaminating solids, the method including feeding a wastewater stream to a first pre-treatment unit producing a first pretreated stream, feeding the first pretreated stream to a first centrifuge for centrifugal separation, producing a first liquid centrifuged stream, and a second liquid stream, and feeding the first liquid centrifuged stream to a second centrifuge producing a resultant centrifuged stream of recoverable oil and a water phase centrifuged stream which can be treated further or fed back to a source for re-use. The source may be a facility from the group including refineries, chemical plants, paper mill plants, and oil and gas processing facilities.

The invention relates to a method for preparing a length-diameter-ratio nano-silver wire by a pH-value regulation solvothermal method. The method comprises the following steps of: preparing the following ethylene glycol solution, namely an ethylene glycol solution A of silver nitrate or silver acetate, an ethylene glycol solution B of polyvinyl pyrrolidone (PVP), an ethylene glycol solution C of water-soluble chloride and concentrated acid D; mixing the components according to a certain amount and fully stirring to form a final mixed solution; moving the final mixed solution into a reaction kettle; placing in an oven for reaction for a certain time; taking the reaction kettle out and cooling to room temperature to obtain mother liquid of the nano-silver wire; adding alcohol into the mother liquid for diluting, and removing supernatant liquor to obtain a precipitate; and repeatedly performing centrifugal separation, and thus obtaining nano-silver wire dispersion liquid uniformly dispersed in the alcohol. The method is simple, high in efficiency and low in cost, and can prepare high-quality nano-silver wires within a wider range of reaction condition; and prepared products are high in length-diameter ratio, good in length uniformity and low in impurity content.

A flexible metal support device for a rotatable centrifuge rotor (2) provided in a frame member (1) by a bearing member (4). The support device comprises a support element (7) provided between the bearing member (4) and the frame member (1), and arranged to absorb relative movements between the centrifuge rotor and the frame member. The support element (7) comprises an inner mounting portion, essentially immovable in relation to the bearing member (4), and an outer mounting portion, essentially immovable in relation to the frame member (1). Moreover, the support element (7) comprises three flexible connecting portions which each extends between the inner and outer mounting portions and is arranged to absorb radial and axial relative movements between the centrifuge rotor and the frame member. Furthermore, the inner portion, the connecting portions and the outer portion form an integrated unit manufactured in one piece of metal material.

A process for producing a purified product of green tea extract, which includes subjecting an aqueous solution of green tea extract to solid-liquid separation by filtration and/or centrifugal separation to obtain another aqueous solution of green tea extract, said another aqueous solution having a turbidity of from 0.2 to 2.0 as measured with a concentration of non-polymer catechins in it adjusted to 1 wt %, and then allowing the another aqueous solution of green tea extract to pass through a polymer membrane having a membrane pore size of from 0.05 to 0.8 μm such that the turbidity of the another aqueous solution of green tea extract is reduced to lower than 0.2 as measured with a concentration of non-polymer catechins in it adjusted to 1 wt %.

The invention discloses a wastewater evaporation concentration process and a wastewater evaporation concentration device system. The process comprises the following steps of: delivering softened wastewater to be treated to a mechanical vapor recompression (MVR) system to perform evaporation and concentration, compressing the generated secondary steam and then delivering the compressed steam to an evaporator to recycle, delivering the concentrate to a triple-effect mixed flow forced circulating evaporation crystallization system to perform evaporation and crystallization, performing solid-liquid centrifugal separation on the crystallized concentrate and crystal grains, returning the separated mother solution to a stock solution tank or continuously performing evaporation and crystallization, and reclaiming the separated crystal, wherein the secondary steam generated by evaporation and crystallization is recycled for the evaporation crystallization system. After the wastewater is evaporated and concentrated by adopting the process of mechanical vapor recompression circulating evaporation and triple-effect mixed flow forced circulating evaporation crystallization, the wastewater does not need to be discharged to the ground water area, and the wastewater is discharged in a form of steam or closed and embedded in a form of sludge or the like, so the purpose of zero discharge of the wastewater can be fulfilled; and the process system has high heat efficiency, low energy consumption, energy conservation, great reduction in running cost, low temperature difference, low corrosion, difficult scale formation and long equipment service life.

The present invention is serial antiviral immunoregulators, including feed additive for fish, shrimp and pet; immunoregulator vaccine for farm animal and antiviral injection for farm animal and pet, with fucoidin ester as effective component. During its preparation, fucoidin ester is first extracted from kelp and other brown algae through the steps of lixiviation, centrifugal separation, reverse osmosis to cencentrate, ethanol, precipitation, active carbon decoloring, ultrafiltering to desalt and refining, and then further prepared into the antiviral immunoregulator through superfine crushing, vacuum drying and other technological steps. The technological process is simple, high yield, high purity and easy to realize in industrial production.

The invention relates to a graphene-coated mesoporous metallic oxide, and a preparation method and use thereof. The preparation method for the graphene-coated mesoporous metallic oxide comprises the following steps of: 1) synthesizing mesoporous metallic oxides with different pore passage structures by taking mesoporous silicon dioxides with the different pore passage structures as templates; 2) preparing a graphene oxide by using an oxidation method; 3) absorbing mesoporous metallic oxide particles on the surface of the graphene oxide by using a heterocoagulation method; 4) reducing the graphene oxide into graphene by adding a reducing agent; and 5) performing centrifugal separation, washing and drying. The graphene-coated mesoporous metallic oxide provided by the invention has high electrochemical properties, and can be used as an electrode material of a lithium battery.

The invention discloses a method for extracting lithium salt from spodumene, comprising the following steps: roasting, transforming, cooling, levigating, mixing size, carrying out pressure leaching, lowering temperature, reducing pressure, carbonizing, separating, washing, removing impurities, carrying out thermal decomposition, carrying out centrifugal separation, rinsing, drying and the like to obtain the qualified lithium carbonate product. The invention adopts the pressure leaching process to extract the lithium from the spodumene, has the advantages of simple and practical process, low production cost, less pollution, stable product quality and high resource utilization, better economic and social benefits, and suitability for extracting the lithium in industrialization.

A floating separating element for use in centrifugal separation of components of a physiological fluid comprises a positioning part and a separating part, where the positioning part is designed to automatically assume a position in a supernatant and a separating part is positioned at a desired location with respect to the interface between the supernatant and heavier components. In preferred embodiments the physiological fluids are blood or bone marrow aspirate, and the heavier components comprise red blood cells. The positioning part comprises the majority of the mass of the separating element and is thin so that differences in the position of the separating element with respect to the interface are small compared to differences in the densities of the separated compoments, particularly the component comprising red blood cells. A method allows red blood cells to move the separating element during decanting to ensure complete decant of the supernatant.