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212results about How to "Improve curing rate" patented technology

Precoated sand material applicable to laser sintering of magnesium alloy, and preparation method thereof

The invention discloses a preparation method for a precoated sand material applicable to the laser sintering of a magnesium alloy. The precoated sand material comprises evenly mixed crude sand, an organic binder, a coupling agent, a curing agent and a flame retardant, wherein the flame retardant is a mixture of any two or three of boric acid powder, carbon powder and pyrite powder. By adding the composite flame retardant, the defects of surface ablation and formed holes, micropores and the like when in pouring a magnesium alloy can be greatly reduced; in addition, the composite flame retardant added in the precoated sand solves the problem that a single flame retardant can greatly reduce the strength of an initial precoated sand laser-sintered part blank. According to the preparation method, not only can the magnesium alloy flame retardance problem of an SLS precoated sand mold sand core be solved, but also the strength of the initial laser-sintered molding part blanks can be guaranteed, the precoated sand material can be directly applied to pouring of a magnesium alloy, especially to high-temperature pouring of the magnesium alloy, and has great advantages on the fast integral precise forming aspects of especially complicated inner cavity, and integrated sand mold sand core.
Owner:NANCHANG HANGKONG UNIVERSITY

Normal-temperature preparation method for ultrafine lung-regulating and cough-relieving powder and special bilateral airflow sieving machine thereof

The invention discloses a normal-temperature preparation method for ultrafine lung-regulating and cough-relieving powder. The method comprises the following steps of: selecting bulk pharmaceutical decoction pieces of lily, dwarf lilyturf root, rhizoma pinelliae preparata, aster, liquoric root, thinleaf milkwort root-bark, common anemarrhena, coastal glehnia root, dried orange peel, indian buead and floatstone; smashing bulk pharmaceuticals into coarse powder at the normal temperature; uniformly mixing the obtained coarse powder according to a certain proportion, putting into a rod mill for smashing, conveying into a special bilateral airflow sieving machine through wind for sieving with a 500-mesh sieve, sieving to obtain powder of which the particle diameter is less than or equal to 25 micrometers, conveying the powder which is obtained by sieving to a cyclone aggregator through airflow generated by a draught fan for collecting to obtain finished ultrafine lung-regulating and cough-relieving powder; and collecting powder which is not sieved with the 500-mesh sieve, and conveying to the rod mill through a pipeline for smashing circularly once again. The method has the advantages that: the entire preparation process is performed at the normal temperature; the particle diameter of a prepared finished medicament is less than or equal to 25 micrometers, and the cell-wall breaking rate and the biological availability are greatly increased; and due to the adoption of the bilateral airflow sieving machine, the preparation process of the ultrafine lung-regulating and cough-relieving powder is simplified.
Owner:北京康星健华生物科技有限责任公司

Method for extracting rhenium from rhenium-rich concentrates

ActiveCN102628111AThe effect is thoroughHigh recovery rate of rheniumProcess efficiency improvementIonIon exchange
The invention provides a method for extracting rhenium from rhenium-rich concentrates. The method comprises the following steps of: mixing the rhenium-rich concentrates with quick lime, grinding a mixture, feeding oxygen-enriched air into the mixture, and roasting the mixture at a temperature of 400-900 DEG C; sizing and immersing the roasted mixture by using water, and filtering after the immersion is finished; adding an impurity removing agent into the filtered liquid so as to remove calcium and trace heavy metal ions; filtering after removing impurities; and carrying out ion exchange process on the filtered liquid, which is subjected to impurity removal and filtering, through anion exchange resin, obtaining ammonium rhenate solution after desorption, and obtaining ammonium perrhenate through reconcentration and crystallization. According to the method provided by the invention, quick lime oxygen-enriched roasting and water immersion are used, so that the operations of decoppering, arsenic removal and desulfuration are carried out, therefore rhenium, arsenic and sulfur are oxidized sufficiently under the oxygen enrichment condition; the rhenium, arsenic and sulfur are combined with calcium oxide, so that insoluble substances are generated; the effects of removing copper, arsenic and sulfur are more thorough in the water immersion condition, and the disadvantage that the calcium content is high in the quick lime roasting and water immersion technology is solved through using the impurity removing agent to remove impurities; and the recovery rate of rhenium is high, so that the method provided by the invention is favorable to industrialized application.
Owner:YANGGU XIANGGUANG COPPER

Method and system for treating fly ash in manner combining mechanochemistry and washing, with characteristics of high efficiency, low cost and zero harm

ActiveCN105013798AEfficient solidification of heavy metalsEfficiently achieve degradabilitySolid waste disposalElectronic waste recyclingEnvironmental resistanceResource utilization
The invention relates to the field of harmless fly ash treating, and provides a method and system for treating fly ash in a manner combining mechanochemistry and washing, with characteristics of high efficiency, low cost and zero harm. The system comprises a feed bin, a horizontal roller type ball mill, a stirring kettle and a plate-and-frame filter press, wherein the bottom of the feed bin is connected to a feed opening of the horizontal roller type ball mill; stainless steel milling balls are placed in a closed barrel body of the horizontal roller type ball mill; two ends of a discharge pipeline are connected to the bottom of the horizontal roller type ball mill and the upper part of the stirring kettle respectively; the upper part of the stirring kettle is connected with a water inlet pipeline, and the bottom of the stirring kettle is connected to the plate-and-frame filter press. According to the method and the system which are disclosed by the invention, the heavy metal solidification, the dioxin degradation and the chlorine removal of the fly ash can be realized at the same time in high efficiency, the treated fly ash is thoroughly harmless and has conditions of resource utilization, and the heavy metal solidification rate of the treated fly ash is more than 70%; an additive is not additionally added, so that the treating cost is low; the technological process is simple, the reaction conditions are mild, the treating process is environment friendly, and harmful by-products are not generated; the equipment investing cost and the operating cost are low, the treating effects are significant, and the technological process is simple to realize.
Owner:ZHEJIANG UNIV

Medicine for treating gastroesophageal reflux disease and functional dyspepsia

A combination preparation for remedying the gastroesophageal reflux disease (GERD) and the functional dyspepsia is characterized in that the prescription of the combination preparation consists of a proton pump depressor and a gastrointestinal power drug of itopride; the proton pump depressor is selected from one of a Pantoprazole, a Omeprazole, a Esomeprazole, a Lansoprazole, a Rabeprazole, a Tenatoprazole and a Leminorazole, wherein the Pantoprazole is preferential, and at the same time the neutral form of the basic salt of the proton pump depressor is also included, such as Naplus, Mg2plus, Ca2plus, Kplus or Li plus salt and a pure optical stereoisomer of the proton pump depressor or an active metabolite of the proton pump depressor; the gastrointestinal power drug is the itopride and a ramification of the itopride or one of the medicinal salts of the itopride; in the combination preparation, the weight ratio of the Pantoprazole and the itopride is 2 to 5 to 2 to 7. The invention has important affect for remedying the gastroesophageal reflux disease and the functional dyspepsia, and the preparation method of the invention is simple and convenient; the cost is low; the invention is fit for being orally taken by the patient; the invention has good conformance performance, high curative effect, low recrudescence rate and little adverse reaction.
Owner:沈阳东宇药业有限公司

Thermoplastic polyurethane optical film and coating method thereof

The invention provides a thermoplastic polyurethane optical film. The thermoplastic polyurethane optical film is obtained by mixing thermoplastic polyurethane (TPU) and polypropylene (PP) according toa mass ratio to obtain a basic material and preparing from acrylic monomers, coupling agents, initiators, fire retardants and auxiliary additives. The thermoplastic polyurethane optical film has hightransparency, excellent mechanical properties, high weather and chemical resistance, high-and-low temperature resistance and good bonding properties, and can be melted, flowable, transparent, and extremely-low initially viscous under a certain temperature, thereby being capable of serving as an optical coating rubber material for touch display screens; touch display screen components bonded by the thermoplastic polyurethane optical film have the advantages of simplicity and convenience in process, convenience in bubble elimination, easiness in rework, high production efficiency, low cost andthe like, and touch display screen components coated with the thermoplastic polyurethane optical film have the advantages of good optical performance, excellent mechanical property, high chemical andweather resistance and good environmental performance, so that the thermoplastic polyurethane optical film is an excellent optical rubber material.
Owner:SHENZHEN GAOREN ELECTRONICS NEW MATERIAL

External medicament for treating bacterial vaginosis and colpitis mycotica

The invention discloses an external medicament for treating bacterial vaginosis and colpitis mycotica. The external medicament is a medicament prepared from Chinese medicinal raw materials including 35-70 parts by weight of amur corktree bark, 30-60 parts by weight of lightyellow sophora root, 30-60 parts by weight of cortex ailanthi, 20-40 parts by weight of polygonum aviculare, 10-35 parts by weight of selinum japenious seed and 1-2.5 parts by weight of borneol according to the conventional preparation method. As proved by a pharmacodynamic test, the medicament has a remarkable in-vitro antibacterial action, and can be used for effectively killing and suppressing common pathogenic bacteria of reproductive tract infection; the medicament has a remarkable treatment effect on rabbit colpitis mycotica; compared with a model control group, a medicament group has the advantages: the vagina cleanliness and curative ratio are increased remarkably, and the pathological feature of rabbit colpitis mycotica can be improved remarkably; the medicament has a remarkable anti-inflammatory effect, and can be used for remarkably relieving dimethyl benzene-caused mouse auricle inflammation, suppressing the formation of mouse granuloma and reducing the mouse abdominal cavity capillary permeability; and the medicament has a certain itching relieving effect.
Owner:HC SYNTHETIC PHARMA CO LTD
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