1931results about How to "Fast dissolution" patented technology

Drugs, especially low aqueous solubility drugs, are provided in a porous matrix form, preferably microparticles, which enhances dissolution of the drug in aqueous media. The drug matrices preferably are made using a process that includes (i) dissolving a drug, preferably a drug having low aqueous solubility, in a volatile solvent to form a drug solution, (ii) combining at least one pore forming agent with the drug solution to form an emulsion, suspension, or second solution and hydrophilic or hydrophobic excipients that stabilize the drug and inhibit crystallization, and (iii) removing the volatile solvent and pore forming agent from the emulsion, suspension, or second solution to yield the porous matrix of drug. Hydrophobic or hydrophilic excipients may be selected to stabilize the drug in crystalline form by inhibiting crystal growth or to stabilize the drug in amorphous form by preventing crystallization. The pore forming agent can be either a volatile liquid that is immiscible with the drug solvent or a volatile solid-compound, preferably a volatile salt. In a preferred embodiment, spray drying is used to remove the solvents and the pore forming agent. The resulting porous matrix has a faster rate of dissolution following administration to a patient, as compared to non-porous matrix forms of the drug. In a preferred embodiment, microparticles of the porous drug matrix are reconstituted with an aqueous medium and administered parenterally, or processed using standard techniques into tablets or capsules for oral administration.

The present invention relates to methods and apparatus that employ electrohydrodynamic flows in miscible, partially miscible and immiscible multiphase systems to induce mixing for dissolution and/or reaction processes. The apparatus and methods of the present invention allow micromixing of two or more components and can advantageously be used to conduct liquid-phase reactions uniformly and at high rates

Described are nanoparticulate formulations of a benzodiazepine, such as lorazepam, that does not require the presence of polyethylene glycol and propylene glycol as stabilizers, and methods of making and using such formulations. The formulations are particularly useful in aerosol and injectable dosage forms, and comprise nanoparticulate benzodiazepine, such as lorazepam, and at least one surface stabilizer. The formulations are useful in the treatment of status epilepticus, treatment of irritable bowel syndrome, sleep induction, acute psychosis, and as a pre-anesthesia medication.

Methods and compositions are provided which comprise effective amounts of analgesic to treat a subject, including reducing or eliminating an adverse effect associated with the analgesic.

The invention discloses a one-variable solid effervescent tablet and a preparation method for the tablet. The material system of the effervescent tablet comprises chlorite, solid acid source, free halogen source, activated Promoter, desiccant, bond, release agent, effervescent and surfactant. The preparation technique includes: after the coating processing with chlorite grains, drying and mixing well with other raw materials according to a specific proportion and technique requirements to prepare compound raw materials, and then pressing into tablets with different specification and shaping on the tablet machine to fit for application in various occasions. The effervescent tablet can quickly release chlorine dioxide and acquire pellucid water solution of chlorine dioxide while dissolving in the water, which is high in stability, rapid in dissolving rapid and strong in bactericidal ability.

The invention discloses a synthesizing method of cationic polyacrylamide 'water-in-water' emulsion, which is characterized by the following: adopting inorganic solution as dielectric with specific viscosity number is 30-90ml/g low-molecular cationic polymer solution as stabilizer; copolymerizing free radical of cationic monomer with double bond and non-ion monomer to form the product with grain size less than 1um; fitting for disposing urban effluent, oil-field effluent and paper-making domain.

A positive-working imageable element comprises inner and outer layers and a radiation absorbing compound such as an IR absorbing dye. The inner layer includes a first polymeric material. The ink receptive outer layer includes a second polymeric binder comprising a polymer backbone and an —X—C(═T)—NR—S(═O)₂— moiety that is attached to the polymer backbone, wherein —X— is an oxy or —NR′— group, T is O or S, R and R′ are independently hydrogen, halo, or an alkyl group having 1 to 6 carbon atoms. After thermal imaging, the element can be developed using an alkaline developer. Use of the particular second polymeric binder reduces sludging in the developer. Its dissolution rate in the developer is slow enough to resist developer attack in the non-imaged areas of the outer layer but rapid enough for the second polymeric binder to be quickly loosened from imaged areas and kept suspended or dissolved for a considerable time.

The invention discloses drag reducer which can be applied to slickwater fracturing fluid and a method for preparing drag reducer. The method includes: adding organic salt into acrylamide and functional monomer aqueous solution to prepare an aqueous phase, adding the aqueous phase into an oil phase system consisting of surfactant and base oil under the condition of high-speed stirring to form a stable W/O (water in oil) type microemulsion system, feeding nitrogen for dispersing oxygen, and adding initiator for polymerization to form a branchless long chain structure. The polymer microemulsion is a transparent or semitransparent thermodynamic stable system, can be quickly swelled into water and is directly usable. Adding a small quantity of the drag reducer during fluid transport can improve flow quantity and reduce energy consumption to some extent, and the drag reduction effect can reach 30%-65% when the drag reducer is compared with clear water. The drag reducer has the advantages of high stability, dissolving speed and dissolving performance, convenience in use, remarkable drag reduction effects and the like and is applicable to the slickwater fracturing technology, and excellent yield increasing effects are obtained after the drag reducer is applied to field fracturing operations.

Provided are implantable and bioresorbable medical devices comprising a bioresorbable substrate and an electronic circuit supported by the bioresorbable substrate. The electronic circuit comprises a membrane of silicon having a thickness less than or equal to 5 μm and an array of dissolvable electrodes, wherein the dissolvable electrodes are formed from the membrane of silicon. The electronic circuit is configured to conformally contact a biological tissue and electrically interface with biological tissue during use. The silicon may be highly doped to provide the requisite characteristics for electrically interfacing with biological tissue, and may be further used to form other components of the electronic circuit, including back-plane transistors electrically connected to the electrode array.

Provided are lithium sulfur battery cells that use water as an electrolyte solvent. In various embodiments the water solvent enhances one or more of the following cell attributes: energy density, power density and cycle life. Significant cost reduction can also be realized by using an aqueous electrolyte in combination with a sulfur cathode. For instance, in applications where cost per Watt-Hour (Wh) is paramount, such as grid storage and traction applications, the use of an aqueous electrolyte in combination with inexpensive sulfur as the cathode active material can be a key enabler for the utility and automotive industries, providing a cost effective and compact solution for load leveling, electric vehicles and renewable energy storage.

An extracting and separating method of high-temperature coal tar belongs to a coal tar separation method. The extracting and separating method includes the step of adding No.1 or No.2 solvent into the coal tar at the ordinary pressure for secondary extraction and separation. Extraction processes are carried out under the pretreatment condition of sufficiently mixing and heating, heating temperature is lower than 150 DEG C, raw materials of the coal tar are respectively mixed with the No.1 or No.2 solvent according to the volume proportion of 1:2 to 4, extraction time ranges from 1 to four hours, extracts and raffinate are obtained after the No.1 solvent and the coal tar are filtered and separated when the system is balanced, and the No.1 solvent is recovered by distillation and recycled. The extracting and separating method has the advantages that energy saving effect of equipment is evident, process is simple and convenient, operation conditions are moderate, manufacturing cost and investment of the equipment are low and benefits are evident. Adding quantity of the solvent and extraction operation parameters are changed, separation depth and process capacity of the coal tar can be flexibly mastered and selectively controlled.

There invention discloses aqueous dispersions of nanoparticulate aerosol formulations, dry powder nanoparticulate aerosol formulation, propellant-based aerosol formulations, methods of using the formulations in aerosol delivery devices, and methods of making such formulations. The nanoparticles of the aqueous dispersions or dry powder formulations comprise insoluble drug particles having a surface modifier on the surface thereof.

A preparation method of a high-strength dissolublealuminum alloy material comprises high-temperature firing, stirring at the mass ratio, deslagging, cooling and thermal treatment. A high-strength aluminum alloypreparation principle and an electrochemical corrosion principle are combined, the product composition stability is successfully controlled, the Al-based alloy material with dissolubility, high strength, good shock resistance, high-temperature resistance, high-pressure resistance, high probability of processing, higher thermodynamic property and excellent dissolving property is prepared, and the overall performance of the material is improved.

The invention relates to a synthetic method of water-in-water cationic polyacylamide emulsion. The synthetic method is characterized by mixing inorganic salt, non-ionic hydrophilic monomers, anionic monomers, hydrophobic monomers, functional monomers having surface activity, a stabilizing agent, a chelating agent and deionized water, adjusting the pH value to be between 6.5 and 7.5, uniformly emulsifying the mixture by an emulsifying machine, introducing nitrogen for protection, adding an evocating agent at twice at the temperature of 18 to 50 DEG C, carrying out second polymerization reactionfor 1 to 3 hours after 4 to 7 hours of the time of first polymerization reaction and making the emulsion product.

A tablet characterized by comprising 5-methyl-1-phenyl-2-(1H)-pyridone as the main ingredient and, based on the main ingredient, 10 to 50 wt. % excipient, 5 to 40 wt. % disintegrator, 1 to 10 wt. % binder, 0.5 to 5 wt. % lubricant, 2 to 6 wt. % coating basis, and 0.05 to 3 wt. % light-shielding agent, wherein the odor or bitterness of the 5-methyl-1-phenyl-2-(1H)-pyridone is masked and the light stability is improved.

Paclitaxel is provided in a porous matrix form, which allows the drug to be formulated without Cremophor and administered as a bolus. The paclitaxel matrices preferably are made using a process that includes (i) dissolving paclitaxel in a volatile solvent to form a paclitaxel solution, (ii) combining at least one pore forming agent with the paclitaxel solution to form an emulsion, suspension, or second solution, and (iii) removing the volatile solvent and pore forming agent from the emulsion, suspension, or second solution to yield the porous matrix of paclitaxel. The pore forming agent can be either a volatile liquid that is immiscible with the paclitaxel solvent or a volatile solid compound, preferably a volatile salt. In a preferred embodiment, spray drying is used to remove the solvents and the pore forming agent. In a preferred embodiment, microparticles of the porous paclitaxel matrix are reconstituted with an aqueous medium and administered parenterally, or processed using standard techniques into tablets or capsules for oral administration.

The invention belongs to the field of petroleum engineering and relates to a shale gas reservoir pre-fracture composite acid solution and its preparation method and application. The composite acid solution comprises the following components: Component a) at least one component of hydrochloric acid, hydrofluoric acid, fluorboric acid, phosphoric acid, formic acid and acetic acid; and Component b) a corrosion inhibitor, a discharge aiding agent, a ferric iron stabilizer and a clay stabilizer. The composite acid solution containing different acids is selected for different reservoirs. Rock core corrosion ratio is 25-30%. A certain rock core corrosion ratio is maintained, and borehole wall collapse caused by too high corrosion ratio is also prevented. The corrosion inhibitor, the discharge aiding agent, the ferric iron stabilizer and the clay stabilizer which are used as additives have good compatibility with acid. The composite acid solution provided by the invention has advantages of fast dissolving speed, uniform mixing, high corrosion inhibition efficiency, high surface activity, good clay stabilizing effect and wide range. Applicable temperature of the composite acid solution is 20-180 DEG C. by the use of the composite acid solution, normal construction of large-scale fracturing of long horizontal-section shale gas wells can be guaranteed under the condition of existing equipment capacity.

The invention discloses a preparation method of amphoteric polyacrylamide dispersion liquid. The preparation method comprises the following steps: putting a main functional monomer into a mixed system comprising an amphoteric dispersion stabilizer, a chelating agent, a pH regulator and inorganic salt deionized water solution; initiating a reaction by virtue of an initiating agent; and preparing the amphoteric polyacrylamide dispersion liquid by virtue of a dispersion polymerization method. The dispersion liquid prepared by adopting a novel amphoteric polymer dispersion stabilizer has the characteristics of good stability, high molecular weight, high dissolution rate and the like, and a synthetic process of the dispersion liquid is environment-friendly and pollution-free and is low in energy consumption, and the product is nontoxic and noncorrosive, cannot generate secondary pollution and accords with the development direction of green and environment-friendly chemical assistants. The amphoteric polyacrylamide dispersion liquid has an application prospect in the fields of water treatment, papermaking, printing and dyeing, oil fields, mining, daily chemicals and the like.

The invention belongs to the technical field of a limestone/gypsum wet flue gas desulfurization technology, and particularly relates to an additive for strengthening a wet flue gas desulfurization technology, which comprises the following components in percentage by mass: 35-45% of mixed organic acid, 5-10% of organic acid salt, 6-9% of surfactant, 1-6% of heavy metal salt and 35-45% of dirt dispersion agent; and the mixed organic acid comprises adipic acid, wherein the percentage of mass of the adipic acid in the mixed organic acid is not less than 50%. The additive can be added and used for strengthening the wet flue gas desulfurization technology, improve the desulfurization efficiency of a system, reduce the energy consumption, strengthen oxidization, improve the limestone quality and restrain system scaling, and accordingly, the purposes of energy conservation, consumption reduction and waste recycling are realized.