158results about How to "High yield" patented technology

A process for producing a spherical carbon material, comprising: subjecting a spherical vinyl resin to an oxidation treatment in an oxidizing gas atmosphere to obtain a spherical carbon precursor, and carbonizing the spherical carbon precursor at 1000-2000° C. in a non-oxidizing gas atmosphere. The thus-obtained spherical carbon material exhibits excellent performances, including high output performance and durability, when used, e.g., as a negative electrode material for non-aqueous electrolyte secondary batteries.

The invention relates to a synthetic method of a polynitrogen azole zinc/cadmium framework material. The method comprises the following steps of: mixing a polynitrogen azole ligand with a metering ratio of a metal polynitrogen azole framework chemical formula, an oxide or a hydroxide with a reaction liquid, carrying out an acid-base reaction after activation, and filtering, washing and drying after the reaction to obtain the polynitrogen azole zinc/cadmium framework material. The synthetic method has mild reaction conditions, and the polymerization process of the polynitrogen azole ligand and the solid oxide or the hydroxide is accelerated by utilizing the coordination buffer action of ammonia to enable the reaction to be rapidly and efficiently finished. The method has simple operation and low production cost and does not generate any other byproducts except a required product and water, the obtained product is easy to activate, and a residual mother liquid can be directly used as the reaction liquid for the next batch of synthesis, thereby realizing continuous production and being particularly suitable for large-scale industrialized production.

An object of the present invention is to provide a method for manufacturing a semiconductor device in which, after crystallizing by using an element that promotes crystallization, holes are prevented from being generated in a crystalline semiconductor film with a concentration of the element in the crystalline semiconductor film decreased by performing gettering. To solve the problem, as a feature of the structure of the invention, in the case of removing a silicon oxide film formed over the semiconductor film, an etchant made of a solution containing fluorine and a substance having surface activity is used.

The invention relates to a preparation method of florfenicol intermediate, in particular to a preparation method of D-threo-2-(dichloromethyl)-4, 5-dihydro-5-(p-(methylsulfonyl) phenyl)-4-oxazole methanol, which comprises the detailed steps as follows: 100 portions of D-p-methylsulfino phenyl ethyl serinate (I) are dissolved in 500 to 700 portions of methanol; then 24 to 27 portions of potassium borohydride are added; the reaction temperature is between 30 and 50 DEG C and the reaction time is between 4 and 8 hours; 80 to 150 portions of methanol are recycled and 230 to 300 portions of glycerol are added; then acid is used for neutralizing the reaction solution to adjust the pH of the solution to be between 7 and 10; and 42 to 45 portions of dochloroacetonitril are added to generate the D-threo-2-(dichloromethyl)-4, 5-dihydro-5-(p-(methylsulfonyl) phenyl)-4-oxazole methanol (II). The preparation method has the characteristics of few technique steps, simple operation and low cost.

The invention relates to a regeneration method of a titanium-silicon molecular sieve. The method is characterized by: mixing a regeneration liquid with a filtered stock of a titanium-silicon molecular sieve synthesis process to obtain a mixed solution, contacting the mixed solution with a deactivated titanium-silicon molecular sieve, putting them in a closed reaction kettle to undergo a hydrothermal treatment, and recovering the regenerated titanium-silicon molecular sieve. The titanium-silicon molecular sieve regenerated by the method has activity equal to that of a fresh agent. The method is green and efficient, and has a high yield.

The invention discloses a synthetic method of 5-alkyl-[1,3,4]-oxadiazole-2-alkyl ester formate. The synthetic method comprises the following steps: 1, performing ammonolysis reaction on dialkyl ester oxalate and hydrazine hydrate to obtain mono alkyl ester hydrazide oxalate; 2, performing acylation reaction on the obtained mono alkyl ester hydrazide oxalate and fatty acid anhydride to obtain 2-acylhydrazino-mono alkyl ester oxalate; and 3, performing dehydration cyclization reaction on the obtained 2-acylhydrazino-mono alkyl ester oxalate to obtain a target product, namely 5-alkyl-[1,3,4]-oxadiazole-2-alkyl ester formate. The synthetic method of the 5-alkyl-[1,3,4]-oxadiazole-2-alkyl ester formate, disclosed by the invention, can avoid the use of reagents with strong toxicity and strong corrosivity by improving the process, and is novel in route, high in yield, low in raw material and solvent price, safe, simple and convenient to operate, and suitable for industrial production.

The invention discloses a method for preparing cefotiam hydrochloride. According to the method, mother liquors produced from two-step reactions of synthesis and refinement of a cefotiam hydrochloride crude product in a reaction process are treated, the treated mother liquors are recycled respectively in the two-step reaction processes of synthesis and refinement of the cefotiam hydrochloride crude product, so that the cefotiam hydrochloride product yield is greatly increased, and the quality of the product meets standards.

A tetradendate amide based macrocyclic ligand and its Fe(III) complex which act as activators of hydrogen peroxide. The synthetic methodology to develop the ligands is new, simple and provides better yield for each step of the ligand synthesis. The Fe(III)-complexes and hydrogen peroxide together are can perform several environmentally benign oxidation reactions. Organic dye bleaching, bleaching of pulp and paper effluent and N-oxide synthesis may be performed using the newly developed catalyst and hydrogen peroxide. Alcohol oxidation and alkene epoxidation may also be performed using the catalysts and hydrogen peroxide.

Metal-Insulator-Metal (MIM) diodes in back-to-back thin film diode (TFD) liquid crystal display (LCD) device are formed on dual selective lines respectively. A transparent conductive layer on a first substrate comprises a pixel electrode, a first bottom layer, a second bottom layer, a third bottom layer, and a fourth bottom layer. A semiconductor insulator layer with a first contact hole on the first bottom layer and a second contact hole on the third bottom layer covers the first substrate and the transparent conductive layer. A metal conductive layer comprises a first selective line, a second selective line, a first top layer, and a second top layer, wherein an overlapped region between the first bottom layer and the first top layer is a first MIM diode, an overlapped region between the second bottom layer and the first top layer is a second MIM diode, an overlapped region between the third bottom layer and the second top layer is a third MIM diode, and an overlapped region between the fourth bottom layer and the second top layer is a fourth MIM diode. The first selective line electrically connects to the first bottom layer via the first contact hole, and the second selective line electrically connects to the third bottom layer via the first contact hole. The first and second top layers respectively isolated to the first and second selective lines are in the conformation of the first and second selective lines respectively.

The invention relates to the technical field of food processing, and discloses a chicken leg meat shaving device with automatic clamping and reciprocating meat scraping functions which comprises a mounting frame, a conveying roller is slidably connected to the side face of the mounting frame, a containing groove is formed in the circle center of the mounting frame, and a trigger mechanism is slidably connected to the bottom of the containing groove. A locking mechanism is slidably connected to the interior of the side wall of the containing groove, a transmission gear is rotatably connected to the interior of the lower end of the mounting frame, and a cutting mechanism is engaged with the side face of the transmission gear. A trigger mechanism is triggered by a meat processing object placed in a placement groove, so that an internal circuit is connected, and an electromagnetic rod and a magnetic block repel each other to enable a fixed blade to lock meat, so that the purpose that the meat needing to be processed can be fixed in the processing process and is prevented from falling in the processing process is achieved, and the machining continuity is maintained, and the machining efficiency is improved.

The invention discloses a method for multiphase compound continuous production of vildagliptin, which comprises the following steps: adding a solvent into L-prolinamide, conducting heating and stirring to dissolve the L-prolinamide, controlling the temperature, dropwise adding a formed solution into a chloroacetyl chloride solution, conducting reacting, without treating the reaction solution, adding a dehydrating agent, conducting quenching, and adjusting the pH value to a neutral state, conducting layering, taking an organic layer, dropwise adding the organic layer into an amantadine alcohol solution, controlling the temperature, preserving heat, conducting concentrating, pulping and filtering, washing a filter cake, and conducting drying to obtain vildagliptin. According to the method, 2,6-dimethyl pyridine is used as a solvent and an acid-binding agent, amantadine alcohol is added under the homogeneous condition, no solid is generated, reaction liquid is directly adopted for next-step reaction, and the requirement for stirring of production equipment is low; the steps of post-treatment are reduced, the energy consumption is reduced, and the yield is improved; commercialized production can be realized; and the time is shortened, the post-treatment is simple, and the operation conditions are simple.

The invention discloses a ginseng seed quick-release pellet and a preparation method thereof. The ginseng seed quick-release pellet comprises the components in parts by weight: 5-7 parts of a ginseng seed extract, 20-30 parts of a water-soluble solid dispersion carrier material, 20-40 parts of a filling agent, 3-8 parts of a disintegrating agent and 0-proper amount of an adhesive. The ginseng seed quick-release pellet disclosed by the invention has the characteristic of quickly disintegrating to quickly release the active ingredient ginseng seed extract, so that the solubility and bioavailability of the ginseng seed extract are effectively improved, the effect of the ginseng seed extract can be fully exerted, and the clinical application effect of the ginseng seed extract is improved. According to the preparation method of the ginseng seed quick-release pellet, the process conditions are easy to control, and the prepared ginseng seed quick-release pellet is stable in quick-release effect, high in percent of pass and high in yield.

The invention discloses dibenzofuran type lignans separated from oenanthe javanica and a preparation method thereof, and application of the dibenzofuran type lignans in resisting gouty arthritis. According to an extraction process disclosed by the invention, oenanthe javanica is used as a raw material, and the steps of ethanol reflux extraction, silica gel column chromatography, gel chromatography, liquid chromatography preparation and the like are comprehensively adopted and cooperate with one another to successfully separate the new dibenzofuran type lignans from an active part. Extracted finished compounds are novel in structure; the extraction process is simple, convenient and rapid, operation is easy, and yield is high. A gouty arthritis model is established on the basis of mouse ankle injection sodium urate crystallization, the influence of the new dibenzofuran lignans extracted from the oenanthe javanica on IL-1beta and TNF-alpha levels in mouse serum is determined, and the anti-gouty arthritis activity of the novel dibenzofuran lignans is evaluated. The application of the novel dibenzofuran type lignans in preparation of anti-gouty arthritis medicines is disclosed for the first time, and a foundation is laid for research and development of clinical anti-gouty arthritis treatment medicines in the future.

Method and apparatus for configuring a programmable logic device to operate at a plurality of clock frequencies comprising configurable programmable self-timed delay circuits and associated configuration software. The configurable IC clock frequencies increase device performance and manufacturing yield.