6143 results about "Solvent" patented technology

Pharmaceutical compositions for the transdermal administration of a medicament or other active agent by topical application of the composition to the skin of humans or other animals are described. Methodology for formulating such compositions which provide for very rapid uptake of the medicament and transmigration into and through the skin to either fatty tissues or the vascular system, while minimizing irritation to the skin and/or immunological response, is based on a transdermal delivery system (TDS) wherein the medicament is modified to form a true solution in a complex formed from particular solvents and solvent and solute modifiers in combination with skin stabilizers. Uptake of the medicament is further facilitated and made more rapid by including Forskolin or other source of cellular energy, namely induction of cAMP or cGMP. Selection of specific solvents and solvent and solute modifiers and other functional ingredients and the amounts thereof are chosen such that there is a balance between the sum of the mole-moments [(molar amount of each individual ingredient)x(dipole moment of that ingredient)] of the delivery system and the sum of the moler moments of the composition in which the medicament is dissolved. Preferably, the van der Waals forces of the delivery system is also similarly matched to the van der Waals forces of the total composition, namely, delivery system plus active agent.

A hygroscopic pharmaceutical composition includes at least one hygroscopic substance at a concentration sufficient to provide an Aw value of at least 0.9 and an antiinfective agent. A foamble pharmaceutical carrier includes about 50% to about 98% of a polar solvent selected from the group consisting of a polyol and PEG; 0% to about 48% of a secondary polar solvent; about 0.2% to about 5% by weight of a surface-active agent; about 0.01% to about 5% by weight of at least one polymeric agent; and a liquefied or compressed gas propellant at a concentration of about 3% to about 25% by weight of the total composition.

The present invention is directed to methods for removing carbon dioxide from air, which comprises exposing solvent covered surfaces to air streams where the airflow is kept laminar, or close to the laminar regime. The invention also provides for an apparatus, which is a laminar scrubber, comprising solvent covered surfaces situated such that they can be exposed to air stream. In another aspect, the invention provides a method and apparatus for separating carbon dioxide (CO₂) bound in a solvent. The invention is particularly useful in processing hydroxide solvents containing CO₂ captured from air.

The invention relates to stable pharmaceutical or cosmetic foam compositions containing certain active agents, having unique therapeutic properties and methods of treatment using such compositions. The foamable composition includes at least one solvent comprising polyethylene glycol (PEG) or PEG derivative and mixtures thereof, or comprising propylene glycol, wherein the solvent is present at a concentration of about 70% to about 96.5% by weight of the total composition, at least a non-ionic surface-active agent at a concentration of about 0.1% to less than about 10% by weight of the total composition.

The present invention relates to a therapeutic kit to provide a safe and effective dosage of a vasoactive agent, including an aerosol packaging assembly including: a container accommodating a pressurized product; and an outlet capable of releasing the pressurized product as a foam, wherein the pressurized product comprises a foamable composition including: a vasoactive agent; at least one organic carrier selected from the group consisting of a hydrophobic organic carrier, an organic polar solvent, an emollient and mixtures thereof, at a concentration of about 2% to about 50% by weight, a surface-active agent, about 0.01% to about 5% by weight of at least one polymeric additive selected from the group consisting of a bioadhesive agent, a gelling agent, a film forming agent and a phase change agent, water; and liquefied or compressed gas propellant at a concentration of about 3% to about 25% by weight of the total composition.

The invention provides a method of treating of a well, a formation, or both, with the solids, liquids, or apparatuses, by 1) encasing said solids, liquids, or apparatuses in a water-soluble shell, 2) conveying said encased solids, liquids, or apparatuses to a predetermined location in the well, and then 3) allowing the water-soluble shell to dissolve in the aqueous phase in the wellbore. The shell is preferably made of water-soluble polyvinyl alcohol copolymers and a waterproofing agent. The shell encases a variety of solids, liquids, or combinations thereof, where said solids or liquids are useful in the treatment of the well or of the producing formation. Illustrative encased material includes soap, acid, corrosion inhibitors, chelating agents, scale inhibitors, mutual solvents, paraffin inhibitors, paraffin dissolvers, clay stabilizers, and tracer materials. The encased materials may also be apparatuses, such as a prefabricated screen completion or a prefabricated sand-pack. The tool used to deliver the apparatuses may also be made from a water-soluble polyvinyl alcohol copolymer.

PCT No. PCT/FR97/01452 Sec. 371 Date Jun. 5, 1998 Sec. 102(e) Date Jun. 5, 1998 PCT Filed Aug. 5, 1997 PCT Pub. No. WO98/05314 PCT Pub. Date Feb. 12, 1998Novel stable paracetamol compositions for use in therapeutic chemistry and specifically galenic pharmacy are disclosed. The compositions contain a solution of paracetamol in an aqueous solvent combined with a buffer having a pH of 4 to 8, and a free radical capturing agent. A water-insoluble inert gas is carefully bubbled through the aqueous solvent to remove oxygen from the medium. Said compositions may also be combined with a centrally or peripherally acting analgesic agent, and are provided as injectable compositions for relieving pain.

The present invention is directed to a solid porous matrix comprising a surfactant in combination with a bioactive agent. The solid porous matrix may be prepared by combining a surfactant and a therapeutic, together with a solvent, to form an emulsion containing random aggregates of the surfactant and the therapeutic, and processing the emulsion by controlled drying, or controlled agitation and controlled drying to form the solid porous matrix.

A method of fractionating biomass, by permeability conditioning biomass suspended in a pH adjusted solution of at least one water-based polar solvent to form a conditioned biomass, intimately contacting the pH adjusted solution with at least one non-polar solvent, partitioning to obtain an non-polar solvent solution and a polar biomass solution, and recovering cell and cell derived products from the non-polar solvent solution and polar biomass solution. Products recovered from the above method. A method of operating a renewable and sustainable plant for growing and processing algae.

A method of making a variable resistance material (VRM), the method comprising providing a precursor comprising a metallorganic or organometallic solvent containing a metal moiety suitable for forming the VRM, depositing the precursor on a substrate to form a thin film of the precursor, and heating the thin film to form the VRM. The preferred solvent comprises octane.

A cosmetic composition and process which provides enhanced wear, comfort and feel, the composition containing: (a) at least one polypropylsilsesquioxane film forming resin; (b) at least one polymer chosen from a polyorganosiloxane copolymer and a silicone acrylate copolymer; (c) at least one solvent; and (d) optionally, at least one colorant.

The invention relates to a metal-organic framework material with nano pores and a preparation method and application thereof. The method comprises the step: at least one metal salt react with at least one single-tooth or multi-teeth organic compound which can match with metal ions when at least one solvent exists under conditions of ultrasonic radiation and normal pressure; and the internal part of the obtained metal-organic framework solid has pores and channels with the sizes of 0.3 to 100nm with at least one direction in space. The invention has mild preparation condition and the product has wide application.

A rechargeable lithium cell comprising a cathode having a cathode active material, an anode having an anode active material, a porous separator electronically separating the anode and the cathode, a non-flammable quasi-solid electrolyte in contact with the cathode and the anode, wherein the electrolyte contains a lithium salt dissolved in a first organic liquid solvent with a concentration sufficiently high so that the electrolyte exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a flash point at least 20 degrees Celsius higher than the flash point of the first organic liquid solvent alone, a flash point higher than 150° C., or no flash point. This battery cell is non-flammable and safe, has a long cycle life, high capacity, and high energy density.

A functionalised graphene oxide and a method of making a functionalised graphene oxide comprising: (i) oxidizing graphite to form graphite oxide wherein the graphene sheets which make up the graphite independently of each other have a basal plane fraction of carbon atoms in the sp²-hybridised state between 0.1 and 0.9, wherein the remainder fraction comprises sp³-hybridised carbon atoms which are bonded to oxygen groups selected from hydroxyl and/or epoxy and/or carboxylic acid; and (ii) exfoliating and in-situ functionalizing the graphite oxide surface with one or more functional groups such that functionalisation of the surface is effected at a concentration greater than one functional group per 100 carbon atoms and less than one functional group per six carbon atoms. The functionalised graphene oxide is dispersible at high concentrations in appropriate solvents without aggregating or precipitating over extended periods at room temperature.

A process for recovering Rebaudioside A from Stevia rebaudiana Bertoni plants is provided and includes the steps of sequentially extracting plant material with a first solvent to obtain a first extract, filtering the first extract and passing the first extract through a polar resin to obtain a filtrate, and purifying the filtrate to obtain a crystalline-containing material. With further purification, a product containing over 99% Rebaudioside A is obtained. The present invention is also directed toward a method of purifying stevia glycosides to obtain purified Rebaudioside A. In one embodiment, the method includes silica gel column chromatography using an solvent comprising ethyl acetate and ethanol.

A cosmetic composition and process which provides enhanced wear and transfer resistance containing: (a) at least one polypropylsilsesquioxane film forming resin; (b) at least one solvent; and (c) optionally, at least one colorant.

The present invention relates to methods for recovering a hydroxide based sorbent from carbonate or another salt by electrochemical means involving separation schemes that use bipolar membranes and at least one type of cationic or anionic membrane. The methods can be used in an air contactor that removes carbon dioxide from the air by binding the carbon dioxide into a solvent or sorbent.

A polymer coated modified carbon product is described wherein the polymer at least partially coats a modified carbon product. The modified product preferably has at least one organic group attached to the carbon product and the organic group is preferably substituted with an ionic, ionizable, or polar group for preparation in polar or aqueous based media. Methods of making the polymer coated modified carbon product are also described, such as by aqueous-based or solvent free polymerization methods, organic solvent based polymerization methods, or solution coating methods. Polymeric products and masterbatches containing the polymer coated modified carbon products are also described as well as methods to improve properties such as impact properties and tensile properties. Polymer coated modified colored pigments, methods of making the same, and polymeric products and masterbatches containing polymer coated modified colored pigments are also described.

Processes for producing terephthalic acid are disclosed, the processes comprising combining in a reaction medium p-xylene, a solvent comprising water and one or more saturated organic acids having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature from about 135° C. to about 165° C., in the presence of a catalyst composition comprising cobalt atoms and manganese atoms, with bromine atoms provided as a promoter. The amount of cobalt used may be from about 1,800 ppm to about 6,000 ppm, with respect to the total weight of the liquid in the reaction medium, and the weight ratio of cobalt to manganese may be from about 40 to about 400. The processes according to the invention produce terephthalic acid as a precipitated reaction product, with typically no more than about 10 ppm 2,6-dicarboxyfluorenone produced, with respect to the weight of the terephthalic acid produced, or no more than about 20 ppm 2,6-dicarboxyfluorenone, with respect to the total weight of the reaction medium, per batch or upon one pass through a reactor. The terephthalic acid so produced may be further purified by one or more additional oxidation reactions, without the need for expensive hydrogenation purification processes.

The invention provides a method of producing prime city naphtha, lube base oil and pyroparaffine from Fischer-Tropsch processed wax. The invention includes: a) contacting the Fischer-Tropsch processed wax with the hydrogenated refined catalyst in a hydrogenation refining reaction zone 1, separating the product in the zone, and obtaining a distillate the final distilling point of which is lower than 380 DEG C to 550 DEG C and a distillate the initial distilling point of which is higher than 380 DEG C to 550 DEG C; b) contacting the distillate the final distilling point of which is lower than 380-550 DEG C to 550 DEG C with a hydrogenated isomerization catalyst in a wax hydrogenation conversion reaction zone, and preparing a wax conversion produced oil the pour point of which is lowered; c) contacting the wax conversion produced oil with the hydrogenated refined catalyst in a hydrogenation refining reaction zone II, and separating the product in a distillation zone 2, obtaining at least one kind of solvent oil and at least one kind of lube base oil; d) contacting the distillate the initial distilling point of which is higher than 380 DEG C to 550 DEG C with a hydrogenated refined catalyst in a hydrogenation refining reaction zone 3, thereby obtaining a wax which is hydrogenated and discolored.

Methods of coating an implantable device and a system for performing such methods are disclosed. An embodiment of the method includes applying a coating substance to the surface of an implantable device, and rotating the implantable device in a centrifuge. The method can uniformly coat the implantable device with the coating substance and to remove unwanted accumulations of coating substance entrained between struts or crevices in the implantable device body. This system is applicable to methods for coating intraluminal stents, synthetic grafts, and stent coverings with therapeutic compositions comprising therapeutic agents mixed with a polymeric matrix and a solvent.

The invention relates to a method for preparing mesophase asphalt by coal liquefaction residue. In the method, the coal liquefaction residue is ground, screened and dried, and is extracted at certain temperature for certain time by using organic solvent as extracting solvent; the extracted mixed liquor is filtered, purified and evaporated; the extracting solvent in the extract liquor is evaporatedto obtain refined coal liquefaction oil asphalt, thus obtaining the mesophase asphalt by charring for 4-10 hours in a high-pressure autoclave under the conditions of 410-460 DEG C, 3-4MPa of constantpressure and stirring. The method has simple process and convenient and safe operation, the mesophase asphalt with high quality is prepared and can be used as raw materials of high power and ultra high power graphite electrode, carbon fiber and the like.

The present invention is generally related to electrolytes containing anion receptor additives to enhance the power capability of lithium-ion batteries. The anion receptor of the present invention is a Lewis acid that can help to dissolve LiF in the passivation films of lithium-ion batteries. Accordingly, one aspect the invention provides electrolytes comprising a lithium salt; a polar aprotic solvent; and an anion receptor additive; and wherein the electrolyte solution is substantially non-aqueous. Further there are provided electrochemical devices employing the electrolyte and methods of making the electrolyte.

Processes and apparatus for the treatment of product streams from mineral processing operations, including the treatment of tailings which result from oil sand processing operations. The processes and apparatus relate to the recovery of a diluent solvent from bitumen froth tailings and to the thickening of tailings from a bitumen froth stream and a middlings stream resulting from an oil sand extraction process. In one aspect the processes and apparatus relate particularly to the recycling of product streams to maximize process efficiencies. In a second aspect the processes and apparatus relate particularly to the thickening of tailings to produce an underflow component, a clarified overflow component and an unclarified overflow component.

A method of removing mercury from flue gas containing mercury and particulate solids emanating from a fossil-fuel energy conversion plant and passing through a flue gas duct. The method includes (a) contacting the mercury in the flue gas with a solution containing at least one chloride-containing salt dissolved in a solvent by injecting the solution into the flue gas duct at an injection location, in order to oxidize mercury into HgCl₂, (b) heating the solution prior to or after step (a) to at least about 300° C., and (c) removing oxidized mercury from the flue gas with a device for removing particulate solids from the flue gas.

The invention is a curable cyclobutarene based polymer comprising acid functional pendant groups. The cured polymer displays excellent qualities of toughness, adhesion, dielectric constant, and low stress. The preferred system is soluble in an aqueous base and can be used to generate patterned films with excellent resolution without the need to handle organic developer solvents.

A coating solution comprising 0.1 to 35% by weight of an inorganic or organic polysilazane having repeating units represented by the general formula below and soluble in a solvent and 0.1 to 10% by weight of catalyst such as 4,4′-trimethylenebis(1-methylpiperidine) based on a pure polysilazane content. By applying the coating solution onto the surface of base materials such as metals, plastics, glass, ceramic, wood, cement, mortar, bricks, etc., a silica coating strongly adhered to the base materials can be formed excellent in corrosion resistance and anti-scratch properties and simultaneously excellent in characteristics such as abrasion resistant, long-lasting anti-fouling properties, wetting properties to water, sealing properties, chemical resistance, oxidation resistance, physical barrier effect, heat resistance, fire resistance and antistatic properties.

The invention discloses a waterproof/sealing paint with an aqueous resin as the main body. The aqueous resin is a formula resin which is prepared according to a patent of the applicant of the invention, the aqueous resin and an aqueous hardener are dispersed in an emulsion, and the obtained material which is coated on surfaces of buildings, timbers, rattan articles or metals becomes hard to form a hard and waterproof film after water is evaporated and the aqueous resin penetrates the surface of above objects. The extremely good durability and the extremely waterproof performance are reached, and the exudation of impurities in the objects is sealed, so the influence of the exudation of the impurities in the objects to a next step japanning of the objects is avoided. Compared with general waterproof paints and sealing coats, the waterproof/sealing paint of the invention simultaneously has the functions of waterproof paints and sealing paints, the waterproof/sealing paint which is an aqueous system can be diluted with water, and the waterproof/sealing paint which contains an extremely small amount of organic solvents contains no formaldehyde and no toluene, so the waterproof/sealing paint which has the advantages of environment protection and low usage cost avoids the cost of solvents for diluting the waterproof/sealing paint. The waterproof/sealing paint can be applied to various objects of interior walls and exterior walls of buildings, timbers, metals, rattan articles, paper, various handicrafts and the like.

The present invention includes a solid fat composition that includes an oil having saturated fat and a microbial oil having a long chain polyunsaturated fatty acid and an emulsifier. In particular, the solid fat composition can have high levels of long chain polyunsaturated fatty acid and low amounts of emulsifiers. In preferred embodiments, the polyunsaturated oil is an unwinterized microbial oil. The invention also relates to methods for making such compositions and food, nutritional, and pharmaceutical products comprising said compositions. The present invention also includes a microbial oil product prepared by extracting an oil-containing fraction comprising at least one LC-PUFA from a microbial biomass, and treating the fraction by a process of vacuum evaporation, wherein the oil product has not been subject to one or more of a solvent winterization step, a caustic refining process, a chill filtration process, or a bleaching process.

The invention belongs to the field of fine chemical materials, and more particularly relates to a method for preparing cellulose composite aerogel. The method is mainly characterized by taking a carbon material as a modifying agent, and comprises the following main processes of: firstly dissolving cellulose in a sodium hydroxide/thiourea aqueous solution, a sodium hydroxide/urea aqueous solution or other solvents to prepare a cellulose solution with a certain concentration, adding a carbon nanotube (CNT), graphene oxide (GOS), reduced graphene oxide (rGO) and other modifying agents, standing for carrying out gelation, carrying out solvent exchange on the obtained gel, and drying the composite gel to obtain the cellulose composite aerogel. The preparation technique provided by the invention has a simple process and convenience for operation, and can obviously shorten the time of forming the gel from the solution; and the prepared composite aerogel has higher compressive strength and modulus as well as good heat stability, and has wide application prospects in the biomedical, biological sensing and detecting and other fields.