51 results about "Solid-state chemistry" patented technology

A method is given in which there is delayed release from the treatment fluid of solid chemicals that are obtained in bulk powder form. The method is used in situations in which it is difficult to encapsulate the chemical to achieve delayed release because the chemical is obtained in powdered form. The method involves delivering the powdered chemical in capsules consisting of encapsulated granulates obtained by aggregating the bulk powder under pressure to form a densified material and, optionally, then dry comminuting the densified material to produce granulates of the desired size. The treatment is hydraulic fracturing and the chemical is a breaker, or the treatment is well cementing and the chemical is a dispersing agent, fluid loss control additive, set accelerator, or extender.

A downhole assembly for delivering chemical treatment to a wellbore at the level of a hydrocarbon-bearing formation is provided. The chemical treatment is in solid phase, and slowly dissolves when exposed to wellbore fluids. A method of treating a wellbore using a solid chemical is also provided.

The present invention relates to chemiluminescent assays which incorporate a second film or membrane which includes a solid chemical component for activation of a stable dioxetane. Decomposition of the stable dioxetane can be accomplished using a combination of heat and chemical treatment.

A downhole assembly for delivering chemical treatment to a wellbore at the level of a hydrocarbon-bearing formation is provided. The chemical treatment is in solid phase, and slowly dissolves when exposed to wellbore fluids. A method of treating a wellbore using a solid chemical is also provided.

The invention relates to a pulverizing device, in particular to a solid chemical raw material pulverizing device for a chemistry class in a senior middle school. By the solid chemical raw material pulverizing device for the chemistry class in the senior middle school, time and labor are saved, the experiment is visual, and solid chemical raw materials are pulverized thoroughly. In order to solve the technical problem, the solid chemical raw material pulverizing device for the chemistry class in the senior middle scheme comprises a bottom plate, a collecting box, a cylinder I, a cylinder II, a spring, a wedge block, a breaking box, a cylinder III, a discharge opening, a cylinder IV, a left breaking plate, a valve, a right breaking plate, a contact roller, a funnel, a grinding roller I, a motor I, a motor II, a grinding roller II and a strut, wherein the collecting box, the strut, the cylinder I and the cylinder II are successively arranged on the bottom plate from left to right; the left end of the strut is connected with the funnel; and the motor I is arranged on the left side of the inside of the funnel. By the solid chemical raw material pulverizing device for the chemistry class in the senior middle scheme, effects of time and labor saving, visual experiments and thoroughly pulverizing are achieved.

The invention discloses a solid chemical dust suppression agent and a preparation method thereof. The method comprises the following preparation processes: mixing 2-5 parts by weight of polyving akohol with 100 parts by weight of water, fully emulsifying 1 / 3 of 3-10 parts of acrylic acid, 15-35 parts of vinyl acetate and 5-15 parts of butyl acrylate, and 0.5-2.5 parts of emulsifier; adding 0.5-5 parts of initiator; dropwise adding residual 2 / 3 of acrylic acid, vinyl acetate and butyl acrylate; adding 1.5-3.5 parts of crosslinking agent solution, 15-40 parts of starch and 10-20 parts of polyacrylamide; adjusting PH by sodium hydroxide to obtain milk white thick paste; filtering and drying the milk white thick paste, to obtain white powder of the solid chemical dust suppression agent disclosed by the invention. The solid chemical dust suppression agent disclosed by the invention is convenient to transport and convenient to use, has wetting property and bonding characteristic, and plays the effect of efficiently preventing dust from rising for a long period of time; and a solidified layer is formed on the surface of a powder heap after the solid chemical dust suppression agent as used.

The main purpose of the present invention is to provide solid-chemical compositions and methods and means for their use which specifically: (1) provide for a sustained release of active oxygen and complex inorganic phosphates; and (2) create, enhance, and maintain oxidizing and aerobic conditions which favor non-exothermic, chemical-oxidation processes and aerobic bioremediation and fungal bioremediation processes. The present invention discloses advanced solid-chemical compositions and methods for the non-exothermic chemical oxidation and aerobic and fungal biodegradation of organic compounds and certain inorganic contaminants which may be present in solid and liquid wastes, sludges, leachates, acid-mine drainages, waste waters, soils, sediments, ground waters, surface waters, and other environmental media. The preferred embodiments of the disclosed solid-chemical compositions are prepared and used in the forms of granules, briquettes, tablets, capsules, pellets, and the like, which among other advantages, are easier to handle and apply under typical field conditions. These preferred forms of the disclosed chemical compositions can be made to disintegrate subsequent to their application and / or upon contact with water in a significant and predictable manner via relatively minor variations in their formulation and manufacture. This improved functionality enables the time-dependent release profile(s) of the active-oxygen sources and other ingredients to be varied so as to optimize the remediation of contaminants based on site-specific factors or factors pertaining to the specific waste-stream, media and / or the contaminants therein. Organic contaminants which can be treated using this invention include many different types of petroleum products, and more recalcitrant contaminants such as PCBs, PAHs and pesticides can be degraded by using the disclosed compositions and methods to stimulate fungal biodegradation processes. This invention can also be used to treat inorganic contaminants such as the acids and metals present in acid-mine drainage (AMD).

Analysis of solid chemical and biological particles is achieved by a miniature mass spectrometer and apparatus attached thereto for vaporizing or ablating a stream of chemical and biological particles by a pulsed laser and / or pyrolysis heater sub-assembly at atmospheric pressure or, when desirable, in a vacuum. The mass spectrometer includes a collimation chamber, a repeller assembly, an internal ionization chamber, a mass filter and ion separation chamber, a drift space region, and a multi-channel ion detection array so as to permit the collection and analysis of ions formed over a wide mass range simultaneously. The apparatus for vaporizing or ablating includes an output port adjacent the input to the collimation and vaporization chamber so as to maximize the amount of vaporized material being fed into the mass spectrometer.

A method and apparatus for obtaining a product chemistry from a product and a fluid is provided. A product is housed within a dispenser. A fluid is introduced through a manifold diffuse member having a plurality of ports. A cover is positioned adjacent the manifold diffuse member and includes a plurality of ports. The cover is able to be adjusted, for example, by rotating the cover, to align and un-align the manifold diffuse ports and the cover ports. This adjustment controls the flow characteristics of the fluid through the manifold diffuse member and cover to control the characteristics of the fluid in contact with the product. The adjustment of the cover to control the flow will provide a generally consistent concentration and erosion rate based upon known relationships between a characteristic of the fluid and the flow of the fluid in relation to the product.

The solid state chemistry of 17β-N-[2,5-bis(trifluoromethyl)phenyl]carbamoyl-4-aza-5-α-androst-1-en-3-one of which the international nonproprietary name is Dutasteride (the active ingredient in products marketed as Avodart, Avidart, Avolve, Duagen, Dutas, Dutagen, Duprost) and its process for preparing. The synthetic process comprises formation of the mixed anhydride, its subsequent reaction with 2,5-bis(trifluoromethyl)phenylamine in the presence of an appropriate Lewis catalyst and its isolation, purification and crystallization from acetonitrile / water.

This invention relates to a preparation method of test paper for detecting alcohol content in saliva and test paper prepared thereby. Wherein, using pure cotton pulp filter paper as the bottom carrier of test paper; with solid chemistry technique, adding in turn the tetramethyl benzidine, phosphate buffer, HRP, alcohol oxidase and BSA on the paper, and multiple-step vacuum drying. This invention is safe and reliable for test, can read result directly with color-matching card, and has well repeatability for wide application.

The present invention relates to a method for testing the corrosivity of a solid chemical product on a metal. A purpose of the present invention is mainly to solve the problem of inaccurate test result in the prior art. The technical scheme of the present invention is a method for testing the corrosivity of a solid chemical product on a metal, wherein the corrosivity of a solid chemical product on a metal is tested with a test apparatus for the corrosivity of a solid chemical product on a metal, and the apparatus comprises an air inlet, an other-gas inlet system, a filter, a regulation valve, a flow valve, a flow meter, a gas mixing chamber with a heating outer layer, a humidity regulation system, a temperature control system, a humidity probe, a pressure control system, a thermocouple, a bracket, a plastic net cage, a support plate and a box. With the technical scheme of the present invention, the problem in the prior art is well solved. The test method of the present invention can be used for the test of the corrosivity of the solid chemical product on the metal.

A solid chemical rocket propulsion system includes a solid fuel and a solid oxidizer that is physically separated from the solid fuel and is not mixed with solid fuel while the rocket is initially at rest.

Present invention relates to disclosure of application of some innovative techniques useful for substantially improving process efficiency of production of chlorinated sucrose including their intermediates and derivatives. Application of mild methods of drying has been made for recovery of chlorinated sucrose or their intermediates and derivatives, in substantially pure form or with other solid chemical impurities, obtained at various stages in the process of production of chlorinated sucrose. Mild methods of drying included agitated thin film drying, spray drying, freeze drying and super critical extraction. Use of alkoxides has been introduced for deacylation instead of alkali hydroxides or alkaline earth hydroxides. Deacylation has been shown to be effective both, either before or after drying of the reaction mixture. Extraction and purification of desired products i.e. of chlorinated sucrose or its intermediates or derivatives, from dried solid mixtures could be achieved by using appropriate extraction method, including but not limited to solvent extraction and super critical extraction. Further purification of such extracts can be done by crystallization or direct drying under mild conditions.

Systems, methods and apparatus using a solid chemical as an injectable for inhibiting, decreasing or preventing precipitation and / or deposition of foulants and / or contaminants in oilfield tubulars. The use of solid chemicals providing ease of shipment, greater economy in storage, shipment and delivery and increased ease of use.

Systems, methods and apparatus for injecting a solid chemical for inhibiting, decreasing or preventing precipitation and / or deposition of foulants and / or contaminants in oilfield tubulars. The use of solid chemicals or highly viscous fluids providing ease of shipment, greater economy in storage, shipment and delivery and increased ease of use.

The invention relates to a manufacturing method of a micro-propeller, which belongs to the field of manufacturing of micro electro mechanical systems. The method comprehensively utilizes a metal aluminium film process and a metal stripping process and comprises the following steps of: sputtering metal aluminium on the surface of a silicon wafer; performing photoetching on the silicon wafer to prepare a combustion chamber and a nozzle by using aluminium as a mask and by virtual of deep reactive ion etching (DRIE); performing the stripping process on the surface of a glass sheet to obtain an igniter; and performing the stripping process on the glass sheet to obtain a copper wire and a copper bonding pad. The manufacturing method has the beneficial effects that by virtue of common photoresist and the metal aluminium film, a structure with the deeper combustion chamber and the nozzle is prepared on the surface of the silicon wafer, so that thicker rubber is avoided; as an ignition circuit is prepared by the metal stripping process, the problems of security of etching agents and uncontrollability of corrosion velocity of the agents in a metal wet etching process are solved; and therefore, the process difficulty is reduced, and the manufacturing process is ensured to be successful.

A method and apparatus for obtaining a product chemistry from a product and a fluid is provided. A product is housed within a dispenser. A fluid is introduced through a manifold diffuse member having a plurality of ports. A cover is positioned adjacent the manifold diffuse member and includes a plurality of ports. The cover is able to be adjusted, for example, by rotating the cover, to align and un-align the manifold diffuse ports and the cover ports. This adjustment controls the flow characteristics of the fluid through the manifold diffuse member and cover to control the characteristics of the fluid in contact with the product. The adjustment of the cover to control the flow will provide a generally consistent concentration and erosion rate based upon known relationships between a characteristic of the fluid and the flow of the fluid in relation to the product.

The invention provides a decomposition method of a gold ore sample. According to the method, a solid chemical reagent and the gold ore sample are mixed in a crucible, then a mixture is calcined in a muffle furnace, and silicon and substances such as sulfur, carbon, organic matter and the like are removed rapidly; further, composite acid is adopted for closed decomposition, the problems of incomplete sample decomposition and lower results because of adoption of aqua regia are solved by mixed acid formed by hydrochloric acid, nitric acid and phosphoric acid, and accordingly, gold in the sample is effectively and completely decomposed. Capacity of decomposition of the method is comparable with that of a fire assaying method, the required reagents are conventional chemical reagents in a laboratory, and the method has the characteristics of being low in cost, rapid, efficient, safe, environmentally-friendly, economical and applicable.

Self-cooling compositions and systems adapted to rapidly chill a substance in a compact container are provided. In some implementations, the composition comprises an aqueous solution and solid chemical reactants, wherein at least one solid chemical reactant is selected independently from the group consisting of NH4NO3, urea, and mixtures thereof; and a second solid chemical reactant is selected independently from the group consisting of NH4Cl, calcium sulfate, borax, phosphates, MgCl2, carrageenan, and mixtures thereof. The self-cooling compositions and systems can have a wide range of applications such as cooling comestibles or medical assay kits.

The invention belongs to the technical field of medicinal chemistry, and particularly relates to a stevioside crystal with the crystal form A and its preparation method and application. The stevioside crystal with the crystal form A is subjected to X-ray powder diffraction analysis by using Cu-Kalpha rays, the 20 angle expressed in degrees at least has obvious characteristic diffraction peaks at 7.76, 12.12, 14.18, 15.66, 16.04, 16.62, 19.2, 20.78, 24.00, 27.08, 31.72, 35.32 and 35.70 positions. XRD, DSC, TGA and other solid chemical analysis means are applied to show characteristics of the crystal, it is found that the crystal has the advantages of being high in crystallinity, high in stability and the like, and the crystal is suitable for more extensive application areas. The preparation method of the crystal is simple and easy to operate, the crystallization process is easy to control, the selectivity is good, and the target crystal form can be stably obtained.

The invention provides a preparing method for improving LiH-NH3 hydrogen storing system dehydrogenizing kinetics, and belongs to the technical field of solid state chemistry hydrogen storing. The method comprises the following steps that under the condition of hydrogen, after pre-ball-milling is carried out on alkali metal amides, the alkali metal amides are mixed with LiH, ball-milling treatment is carried out, and LiH materials adulterating with the alkali metal amides are obtained; under the condition without oxygen, hydrogen evolution reaction is carried out on the LiH materials adulterating with the alkali metal amides and the hydrogen, cooling is carried out after the reaction is finished, LiH-NH3 which improves the hydrogen storing system dehydrogenizing kinetics is obtained. Due to the fact that adulterating LiNH2 has the crystal nucleus function in the process that the LiH and NH3 are reacted to generated LiNH2 and H2, the hydrogen evolution reaction is accelerated to carry out, and the LiH-NH3 system dehydrogenizing kinetics can be effectively improved.

The invention belongs to the technical field of a sweetening agent, and particularly relates to a rebaudioside crystal form A, a preparation method, a food compound and application. The rebaudioside crystal form A is subjected to diffraction analysis by X-ray powder obtained through Cu-Ka ray measurement; the 2 theta angle expressed by degree at least has the obvious feature diffraction peaks in positions of 4.72, 7.20, 12.24, 13.40, 14.16, 14.74, 16.54, 17.04, 18.18 and 18.98. The solid chemical analysis measures such as XRPD, DSC, TGA and DVS are used for performing comprehensive expression on the crystal form A; the crystal form A is discovered to have the advantages of high degree of crystallinity, high stability, high water solubility, small moisture absorption performance and the like; the crystal form A is suitable for wider application fields. The preparation method related by the invention has the advantages that the method is simple; the operation is easy; the selectivity is wide; the repeatability is good; the target crystal form can be stably obtained.

The present invention encompasses the solid state chemistry of cefdinir potassium salt.

The invention belongs to the technical field of sweeteners, and particularly relates to a stevioside C crystal form V, a preparation method thereof, a food combination and application. Through X-ray powder diffraction analysis measured by using Cu-K alpha ray, and 2 phi angle indicated by degree has obvious feature diffraction peaks at least at positions of 3.77, 12.87, 14.96, 18.16, 19.58 and 20.92. Comprehensive representation of the crystal form V by applying solid chemical analysis means like XRPD, DSC, TGA and DVS finds that the crystal form V has the advantages of high crystallinity, stability and water solubility and low hygroscopicity and is suitable for wider application fields. The preparation method is simple and easy to operate, and a product prepared by the method is high in crystallinity, stability and water solubility and low in hygroscopicity.

The invention belongs to the technical field of light element solid-state chemistry hydrogen storage and relates to a Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and a preparation method thereof. The Li3N hydrogen storage system is doped with multiwalled carbon nanotubes (MWCNTs) through a ball milling effect to improve the hydrogen storage performance of a high-capacity hydrogen storage system (the Li3N hydrogen storage system). Compared with Li3N samples, the Li3N hydrogen storage material has the advantages that the hydrogen desorption initial temperature and the hydrogen desorption peak temperature of the Li3N hydrogen storage material are lowered, hydrogen desorption speed is increased, and circulating hydrogen absorption and desorption performance is improved evidently.

A method and apparatus for obtaining a product chemistry from a slid block of caustic material is provided. The product is housed within a capsule which is positioned inside a turbulent flow dispenser, which utilizes fluid to erode the block and produce a concentrated solution. The fluid characteristics can be adjusted in the field to achieve a predetermined concentrate level of the solution. The capsule provides a safe and convenient means for handling, storing and shipping the caustic block without exposing the operator or handler to the hazardous material. The capsule includes nested components which can be rotated between a closed or sealed position and an open use position.

A method and apparatus for obtaining a product chemistry from a solid block is provided. The product is housed within a dispenser, which utilizes a liquid and a gas to erode the block and produce a concentrate solution. The liquid and gas characteristics can be adjusted in the field to achieve a predetermined concentrate level in the solution. The introduction of air into the dispenser saves water, while producing higher concentrate levels.

The invention belongs to the technical field of sweeteners, and in particular relates to a stevia glucoside B crystal form G as well as a preparation method, a food composition and the application thereof. The stevia glucoside B crystal form G is measured by a Cu-Ka ray, so that X-ray powder diffraction analysis is obtained; a 2 theta valve expressed in degrees at least has obvious characteristic diffraction peaks at 3.93, 13.45, 16.62, 18.33, 19.90, 23.95 and 28.02. After solid chemical analysis methods such as XRPD, DSC, TGA, DVS and the like are used for carrying out comprehensive characterization on the crystal form G, the crystal form G is found to have the advantages of being high in degree of crystallinity, good in stability and water solubility, low in moisture property and the like, thus being suitable for wider application fields. The preparation method is simple, easy to operate, more in selectivity and good in reproducibility, and can be used for stably obtaining the target crystal form.