780 results about "Separating agent" patented technology

A stable topical alcohol-free aerosol foam containing one or more keratolytic agents is provided. The foam-forming formulation is an emulsion which contains an HFA propellant and one or more keratolytic agents. The emulsion has an oil phase and an aqueous, i.e. water-containing, phase. The active agent(s) may be present in either phase of the emulsion or dispersed in the emulsion. The oil phase may consist at least in part of the HFA propellant. Either or both of the oil phase and the aqueous phase may contain one or more surfactants, emulsifiers, emulsion stabilizers, buffers, and/or other excipients. The foam is stable on the skin, for example, for at least 5 minutes at body temperature, preferably at least 20 minutes at body temperature, and disappears into the skin upon rubbing or after prolonged standing. In one embodiment, the formulation contains an HFA propellant which does not contain additional co-solvents or co-propellants. The formulations demonstrate reduced intensity of the odor and/or color associated with the keratolytic agent(s) as compared to conventional formulations containing keratolytic agents.

The invention discloses a manufacturing technique for a composite board and belongs to the technical field of composite metal strip rolling. The manufacturing technique comprises the following steps implemented successively: joint surface machining, end surface machining, press fit, blank assembly, vacuum pumping and inert gases filling, heating, hot rolling and verifying. By means of the manufacturing technique, the machining accuracy is improved, and volume production of carbon steel-stainless steel composite boards is achieved; simultaneously, air in a combination blank is replaced through vacuum pumping and inert gases filling, oxidization of interfaces of the combination blank is prevented in a subsequent heating process, a little of residual air between the composite interface and two layers of stainless steel interfaces can be squeezed into an air storage bag gradually along with the moving of a roller and the composite blank simultaneously, and the residual air is prevented from expelling a separating agent or oxidizing the composite interfaces, accordingly, the joint of the finished composite slab is improved effectively, and the quality of the composite slab is further improved.

Topical alcoholic gel compositions are disclosed that are useful for delivering therapeutic levels of an NSAID to target in and below the skin. The compositions comprise a topically active drug, an alcoholic solvent, a polymeric thickener, and optionally a keratolytic agent. In one embodiment, excellent viscosity for dermal application is attained without the need of a step for neutralizing the pH of the composition. Alcoholic and alcohol-free topical compositions comprising an NSAID prodrug are also disclosed. The compositions are particularly useful for the treatment of pseudofolliculitis barbae.

The present invention relates to water soluble magnetic nanocomposite using an amphiphilic compound. Specifically, the present invention relates to water soluble magnetic nanocomposite which may be not only used as a contrast agent for magnetic resonance imaging (MRI), an intelligent contrast agent for diagnosing cancer characterized by binding a tissue-specific binder ingredient, a drug delivery system for simultaneous diagnosis and treatment by polymerizing or enveloping drugs and binding a tissue-specific binder ingredient, but also used for separating a target substance using magnetism, and a process for preparing the same.

The invention relates to a method of recovering silicon carbide from the byproducts of the cut processing of solar-grade silicon wafer and electronic-grade wafer. Concretely speaking, in the wafer cut processing, a large amount of slurry cutting liquid is required to be added to reduce mechanical stress and heat stress and make linear cutting process a stable process; thus, a large amount of byproducts comprising a great amount of organic compounds, silicon carbide and polysilicon (moncrystalline silicon) are made; the silicon carbide powder used for the cutting processing of silicon wafer can be recovered from the byproducts. According to the technical proposal provided by the invention, after separation agent is added into silicon wafer cutting byproducts, the sizing agent rich in silicon carbide can be got after mechanical separation; after second mechanical separation, the wet solid, after the processes of alkali cleaning, pickling, rinsing, mechanical separation, drying and size classification, can get the silicon carbide powder which can be used for the cutting processing of silicon wafer.

The invention relates to a wastewater treatment method, in particular to a treatment method of papermaking method tobacco sheet production wastewater. The method comprises the following steps: (1) the production wastewater passes through a grid to perform coarse filtration and flows in a wastewater adjusting tank; (2) the wastewater in the wastewater adjusting tank is lifted to a coagulation device by a lift pump, a Ca-diatomite series composite coagulant is added in the coagulation device to react for 5-10 minutes, then polymeric ferric sulfate and polyacrylamide separating agents are added,the mixture enters a static reaction tank to react for 50-60 minutes; (3) the pH value of the low-concentration organic wastewater is adjusted to be less than 7, then the wastewater is pumped in a ultrasonic micro-electrolysis reactor, the chemical oxygen demand substances in the wastewater are fast digested under the combined action of ultrasonic wave and microelectrodes, the reaction time is 30-60 minutes; and (4) then the wastewater is adsorbed with activated carbon and filtered with quartz sand. The method has the advantages of short treatment time and good treatment effect and has wide applicability.

A process for reclaiming the oily sludge includes such steps as proportionally mixing it with water and separating agent prepared proportionally from sulfuric acid, demulsifier and water, stirring at 70-95 deg. C, laying aside to form oil, water and mud phases, and conventional separation.

The invention relates the separating agent box and application. The agent box comprises erythrocyte precipitating agent, hypaque sodium- ficoll 400# or HISTOPAQUE1077 and cell maintenance liquid. The agent box can separate bone marrow and umbilical cord blood, on the surface of cell there is no any mark, and it doesn't change biological activity of cell. The invention can commercially manufacture, and the application is wide.

Described are ethanol-free foamable microemulsions for topical application, and method of making them. The propellants used in the compositions may be environmentally-friendly hydrofluoroalkanes. The foam compositions may also comprise one or more of a variety of active ingredients, including anti-inflammatory agents, anesthetics, and keratolytic agents.

The invention discloses a separating agent for extracting asphaltum from oil sand, the separating agent comprises components with the weight percentage as follows: sodium (or potassium) hydroxide (0.1-0.5 percent); sodium (or potassium) phosphate (0.5-2 percent), sodium (or potassium) silicic acid (1-5.5 percent), sodium (or potassium) carbonate (0.5-1 percent), sodium chloride (0.1-0.5 percent), oil solvent (3-7 percent), surfactant (0.1-0.5 percent), and water (85-94 percent). The technology with the separating agent to extract asphaltum is simple and easy to control. The recovery ratio of the asphaltum reaches to more than 94 percent, with significant separating effect. Meanwhile, the dose of sodium hydroxide needed by the separating agent is small, the agent can be used repeatedly with little loss, low price and cost, thereby greatly decreasing the separation cost, improving the economic benefits, and being favorable for environmental protection.

The invention relates to a method for extracting refined curcumin and curcuma oil from curcuma. The method comprises the following steps: the curcuma is cleaned, dried in the shade, crushed into 30-40 mesh curcuma powder, low-carbon alcohol and alkyl hydrocarbon are made into a mixed solvent at the volume ratio of 1:1-3, the curcuma powder and the mixed solvent are mixed at a weight ratio of 1:3-5 for extraction twice; the extracts are merged, filtered, separated and removed from dregs, the obtained filtrate is condensed, the concentration level is controlled at 60-90%, and the solvent is recovered; a separating agent containing 0-3% salt is added to the residual concentrated solution, the addition amount of the separating agent is 0.5-2 times of the volume of the concentrated solution, the obtained mixture is kept standing for demixing after evenly stirred; a supernatant is separated and condensed, and the alkyl hydrocarbon is recovered to obtain the curcuma oil; a subnatant is adsorbed by a macroporous absorbent resin, flushed to remove water soluble impurities, and eluted with a desorbent, the solvent is condensed and recovered to crystallize the curcumin, thus obtaining the curcumin with the content more than 95%.

The method of the present invention provides a Method of preparing a spinnable mesophase and carbon fiber by using coal to directly liquefy residue-based asphalt vinyl material. According to the invention, the residue-based asphalt vinyl material which is subjected to direct coal liquefaction as a raw material, and the method comprises the following steps: grinding the asphalt vinyl material, and then placing in a high temperature tube type furnace or a high pressure reaction kettle under the inert gas protection, and preparing under the temperature of 200-500 DEG C and the pressure of 0.1-10 MPa to obtain the spinnable mesophase, performing processes of melt spinning, preoxidation and carbonization treatment on the mesophase to prepare the carbon fiber. The invention has the advantages of simple preparation method, conventional equipment, cheap raw material, good product quality and environmental protection, and is a method for high-value utilization of coal resource. The prepared carbon fiber can be used for high performance aerospace materials, adsorbents with high efficiency, separating agents, catalysts and catalyst carriers and the like.

The problem of the invention is to find a polymer mixture which forms an inter-polymer complex by being responsive to temperature even under neutral to alkaline conditions. According to the invention, a temperature responsive inter-polymer complex capable of showing thermal responsiveness in an aqueous solution, which contains a poly-N-acetylacrylamide or polyvinyl alcohol and polyethylene glycol, polyacrylamide or polymethacylamide, is applied to separating agents, immobilized enzymes, denatured protein modifiers, separation method or concentration of microorganisms, purification or concentration of nucleic acids, drug-releasing microcapsules and the like.

The invention relates to a compound reinforcing method capable of rapidly falling-silt, promoting-seepage, prepressing, reinforcing and blow filling soft clay. The method comprises the following steps: mixing water and soil separating agent and sucking silt mud, introducing the mud mixed with the water and soil separating agent into a cofferdam for silt falling, appearing obvious and rapid solid-liquid separation of the mud in the cofferdam, and overflowing and discharging or recycling the separated tail water containing extremely few of solid matters from the far end of the cofferdam; after filling, silt falling and discharging, respectively inserting a plastic drainage plate, laying a plastic drainage pipe, geotextile and a plastic film on the surface layer of the silt, utilizing a vacuum pump to suck to form negative pressure at the lower part of the plastic film, discharging water in silt body on the surface layer by means of atmosphere pressure to lead the bearing capacity of siltbody on the surface layer to be improved rapidly, establishing an operation platform for follow-up soft base treatment, such as vacuum preloading, pile deep stirring, electroosmosis and plate body stabilizing and other technologies, thus realizing the filling-silt overall soft foundation consolidation treatment purpose in the cofferdam. The technology of the invention reduces the construction time of filling soft soil foundation to half and the cost to a half, is popularized and applied, and has extremely economic and social benefits.

The invention provides a method for recycling and separating paper, aluminum and plastic packaging boxes. The method comprises the steps of: taking the paper, aluminum and plastic packaging boxes; dispersing in a hydraulic dispersion machine; screening and separating out pulp fibers for cellulose high-value use, wherein the rest are the aluminum and plastic composite materials; mixing the obtained aluminum and plastic composite materials with a separating agent, stirring slightly until separating out aluminum and plastic completely; and finally cleaning the separated aluminum and plastic respectively. The separating method of the invention is low in cost, high in recycling efficiency, and does not cause environmental pollution.

The invention relates to a method for synthesizing a micro-nanometer level hollow polymer ball, a carbon ball and a graphitized ball by one step. The method comprises the following steps that: hydroxybenzene and aldehyde are used as raw materials; lysine is used as a catalyst; fatty alcohol is used as a solvent; a polymer hollow ball with an even dimension can be produced by polymerization at a temperature of 80 DEG C; and the polymer hollow ball is further charred to produce a hollow carbon ball. If Fe<3+> is introduced into the polymer hollow ball, the polymer hollow ball is charred to produce a graphitized hollow ball. Through changing a molar ratio of the hydroxybenzene and aldehyde, the catalyst amount and the type of the solvent, the hollow carbon ball with a grain diameter of between 0.6 and 2 mu m can be produced. The micro-nanometer level hollow carbon ball has an even and controllable grain diameter, high purity, smooth surface, stable performance and high technical added value, is suitable for a load type magnetic separation catalyst, an absorption separating agent of pigment and organic molecule and a separating agent of protein and salt and is used as an electrode material of a super capacitor with high power density and high energy density.

A process for wet pulverizing mesoporous silica particles while a surfactant exists in mesopores, and mesoporous silica particles having an average particle diameter of 1 μm or less, wherein the volume of mesopores having a diameter of 2 to 50 nm is 0.7 mL/g or more and the geometric standard deviation of a mesopore distribution is 2.0 or less. In the above process, mesoporous silica particles having a particle diameter in a submicron order can be obtained at a high yield without causing the marked collapse of mesopores and can be produced efficiently by using an ordinary pulverizer and safely by using an aqueous medium. The mesoporous silica particles having an average particle diameter of 1 μm or less are useful as an ink absorbent for ink jet recording paper, low-dielectric film, catalyst support, separating agent, adsorbent and medical carrier for medicines.