41results about How to "Excellent yield" patented technology

The invention discloses a multifunctional seedling cultivation substrate which comprises the components of EM fermented maize straws, perlite, vermiculite and prohexadione calcium, wherein the volume ratio of the EM fermented maize straws, the perlite and the vermiculite is 6: 3: 1, and the amount of the prohexadione calcium is 10-20g/m<3>. The multifunctional seedling cultivation substrate can control excessive growth of seedlings and can effectively prevent side effects of sprayed conventional growth inhibitors, and cultivated seedlings are superior to existing conventional seedling cultivation substrates in root activity, strong seedling index, yield and other aspects. Meanwhile, using amount of grass carbon is reduced, grass carbon resource saving is facilitated, and the purposes of resource utilization of agricultural wastes and environment pollution reduction are achieved.

The present invention discloses a method for producing magnesium sulfate monohydrate by using desulfurization wastewater. The method comprises the following steps: (1) pulping, (2) carrying out desulfurization, (3) discharging the pulp, (4) filtering, (5) carrying out concentration, and (6) carrying out crystallization. With the method of the present invention, high value byproducts can be synchronously produced during a flue gas desulfurization process by using a magnesium oxide method. In addition, with the method of the present invention, a stable running characteristic is provided, and quality of the produced magnesium sulfate monohydrate after desulfurization reaches standards.

The invention relates to a process for synthesizing resveratrol by using de-methylation technology, which comprises using 3,5,4'-trimethoxyl diphenyl ethylene as raw material, using aluminium chloride/ pyridine as catalyst for synthesizing Resveratrol through demethyl process, and employing market available methoxyl benzyl chloride for Wittig reaction with 3,5- dimethoxybenzaldehyde, thus preparing intermediate 3,5,4'-trimethoxyl diphenyl ethylene.

This invention relates to an improved method for synthesizing resveratrol, which takes 3, 5, 4'-methylate toluylene as the raw material, 1, 3, 5-trimethylbenzene as the solvent and hydroquinone as the antioxidant to synthesize resveratrol with alchlor/pyridine as the catalyst and applies commercial cheap anisyl chlorben and 3, 5-dimethoxy benzene formaldehyde for wittig reaction to prepare an intermediate 3, 5, 4'-methylate toluylene.

A provided preparation method for 4-chlorophenylhydrazine hydrochloride comprises the following steps: 1) under an acidic condition, at 5-10 DEG C, dropwise adding a sodium nitrite aqueous solution with a concentration of 20% into 4-chloroaniline to perform a diazo reaction and to generate a diazo salt; 2) under a room temperature condition, dropwise adding an ammonium sulfite aqueous solution into a solution of the diazo salt obtained in the step 1, heating to 50-60 DEG C and keeping the temperature for 3-4 h; and 3) at 50-70 DEG C, dropwise adding a hydrochloric acid solution with a concentration of 20% into the solution obtained in the step 2, keeping the temperature for 1-2 h, reducing the temperature, filtering, washing, discharging the material, and drying to obtain a finished product. The beneficial effects comprise that by using ammonium sulfite aqueous solution as a reducing agent in the reduction reaction, the problems are solved that sodium sulfite solid is easy to cake during material charging in a conventional technology and material charging is not easy to operate; ammonium chloride and ammonium hydrogen sulfate which are generated in the acidification reaction have high solubility in water, and crystallization precipitation is late, thereby facilitating performing of the acidification reaction in the solution and reducing side reactions; and the product crystallizes loosely, is good in fluidity, easy for material discharging and washing, and product quality and yield are both better than conventional production levels.

The invention provides a ceramic tile decorated by dry lamination of colorful particles and micro powder and a preparation method of the ceramic tile which are improved on floral designs, hues, and production technologies. The preparation method of the ceramic tile includes the steps that basic powder materials and colored materials are dry-mixed to prepare toner; the toner is prilled to form colored particles in different shapes; the colored particles and the toner with different colors are conveyed to and stirred in a plurality of stirrers correspondingly according to set proportions; the powder materials which are stirred in the multiple stirrers are conveyed through a plurality of feeding belts correspondingly and blanked into a vertical material loading machine according to a preset material loading procedure, and the powder materials naturally stack to form a flower shape; and the formed flower-shaped powder is conveyed to a press mold frame, pressed and formed.

The invention provides a method for preparing a polyaniline/silver nanocomposite material, which belongs to the technical field of composite materials. The method comprises the following steps of: preparing nano-silver particles in microemulsion; and compounding polyaniline in situ to form a nanocomposite material. By using the method, the problem of the agglomeration of nano-silver particles in a composite material can be solved; an organic-inorganic nanocomposite material of a core-shell coating structure of which the nano-silver particles are inside and the polyaniline is outside is formed; and the organic-inorganic nanocomposite material has the characteristics of high electric conductivity, thermal property and electrochemical performance, and good application prospect. The method has the characteristics of simple process, low production cost, high production efficiency and good industrial production prospect.

The invention provides a chiral polyacid-based metal organic framework material. The chemical formula of the polyacid-based metal organic framework material is C74H101B2Zn2N22O84W24, and is recorded as ZnW-DPNDI-PYI1 and ZnW-DPNDI-PYI2 according to the chirality, wherein the DPNDI is N,N'-bi(4-picoline) naphthalimide and serves as a bridging ligand and a photosensitizer, and the PYI is L-pyrrolidine-2-imidazole and serves as a chiral ligand and an electron donor; crystals belong to a monoclinic system, and both the space group of the ZnW-DPNDI-PYI1 and the space group of the ZnW-DPNDI-PYI2 areP2(1). The chiral polyacid-based metal organic framework material is a multifunctional inorganic porous material, and has an asymmetric photocatalytic oxidation technology, and in the technology, a photocatalyst is driven by visible light to be an excited state, then the excited-state photocatalyst and substrates are subjected to an oxidation-reduction reaction, and therefore reactions of relatedfree radical types are completed.

The invention discloses a novel crystal form of a bortezomib key intermediate II for the first time, provides a novel crystal form of a bortezomib key intermediate, namely (2S)-N-[(1R)-1-(1,2,6,2-dioxo-aza-boron-octane-2-yl)-3-methyl butyl]-3-phenyl-2-pyrazine-2-yl-formamido) propanamide (compound II), namely an alpha crystal form, and discloses a preparation of the compound II, a preparation method of the alpha crystal form, and a method for preparing high-purity bortezomib by using the alpha crystal form intermediate II. The alpha crystal form of the compound II is stable in property, and is conductive to purification of the bortezomib, long-term storage under conventional storage and transportation conditions and especially, development of industrial purification of the bortezomib.

The invention discloses a method for efficiently preparing lithium carbonate. The method specifically comprises the following steps: 1, performing filtering pretreatment on carbonic acid type salt lake brine, and regulating the pH value to be 3.4-4.8 so as to obtain first liquid; 2, adding magnesium chloride into the first liquid, uniformly mixing and stirring, performing solid-liquid separation,evaporating and concentrating the liquid part, and treating in an electric field so as to prepare second liquid; 3, adding an alkaline solution into the second liquid, uniformly mixing and stirring, and performing solid-liquid separation to obtain third liquid; 4, fully stirring the third liquid, an aqueous dispersant and loofah extract in a hydrothermal synthesis reactor, sealing the reactor, heating the reactor and reacting, and filtering the slurry in the reactor so as to obtain a lithium carbonate filter cake; and 5, washing the lithium carbonate filter cake with deionized water, and drying, thereby obtaining the finished product. According to the method disclosed by the invention, different interfering ions are removed by different steps, and the purity and yield of the obtained lithium carbonate are better than those of the conventional method.

The invention discloses a method for producing disodium uridine-5'-monophosphate by a continuous flow reaction device. The method includes the following steps: A, preparing a mixed solution by simultaneously pumping solutions for preparing the mixed solution into a mixer, performing uniform mixing, pumping the mixed solution into a mixed solution storage tank to obtain the mixed solution; B, preparing a uridylic acid reaction solution by mixing a matched reagent and the mixed solution to prepare the uridylic acid reaction solution; and C, preparing the disodium uridine-5'-monophosphate: performing salt formation on the uridylic acid reaction solution, performing crystallization, performing filtration, and performing drying to obtain the disodium uridine-5'-monophosphate. In the preparationmethod for the disodium uridine-5'-monophosphate provided by the invention, the reaction time is shorter, in the reaction process, the mass transfer effect of a microchannel reactor is good, so thatthe selectivity and yield of the reactor are better than those of a previous preparation method, and the yield of the uridylic acid is about 97%.

The invention discloses a burner. The burner comprises a shell body, a burning torch and a center wind passage. The center wind passage is arranged in the shell body. The burning torch is arranged in the center wind passage. The shell body is provided with an air inlet. The center wind passage is connected with the air inlet. The periphery of the center wind passage is provided with at least one smoke protection channel. The smoke protection channel/channels is/are connected with a smoke inlet. A fuel torch/fuel torches is/are arranged in the smoke protection channel/channels. The fuel torch/fuel torches is/are connected with a fuel inlet. A fuel medium passage/passages is/ are arranged in the smoke protection channel/channels, so that the fuel density on fire is reduced; the interval on fire is extended; the sectional area of the initial flame is enlarged; the temperature of the flame high-temperature region is effectively decreased. Therefore, the generation conditions of nitrogen oxide are effectively restrained, combustion is full, and the generation of the nitrogen oxide is reduced. Meanwhile, the service life of a temperature-resistant component/components on the head portion/portions of the fuel torch/fuel torches can be greatly prolonged due to the cooling protection of smoke.

The invention discloses a triamcinolone preparation method, and belongs to the technical field of pharmacy. The triamcinolone preparation method comprises: selecting a tetraenyl acetate material as araw material, carrying out oxidation, esterification at 16 site, epoxidation and fluorination, and hydrolyzing after the fluorination refining to obtain triamcinolone. According to the present invention, the yield and the cost of the method of the present invention are obviously superior to the synthesis method sequentially comprising oxidation and direct epoxidation, wherein the impurity is removed after the fluorination process, such that the problem that the impurity is difficultly removed in the final refining can be avoided, and the impurity can be controlled at the intermediate stage soas to reduce the difficulty in the separation and purification.

The invention discloses a method for continuously producing 5-nitroguaiacol sodium salt by using a micro-channel reaction device. The method comprises the following steps of: (1) pumping a guaiacol-acetic anhydride solution containing an acidic catalyst into a micro-channel reactor I for reaction to obtain an acetyl guaiacol solution; (2) respectively pumping the cooled acetyl guaiacol solution and a nitric acid-acetic acid mixed solution into a micro-channel reactor II simultaneously for reaction to obtain a 5-nitroacetyl guaiacol solution; (3) cooling the 5-nitroacetyl guaiacol solution, pouring the 5-nitroacetyl guaiacol solution into water for crystallization, performing filtering, and collecting filter residue to obtain a 5-nitroacetyl guaiacol wet product; and (4) adding the 5-nitroacetyl guaiacol wet product into a sodium hydroxide solution, carrying out heating reaction, at the end of the reaction, conducting cooling, crystallizing and filtering, collecting the filter residue,and performing drying to obtain the 5-nitroguaiacol sodium salt. According to the method, the utilization rate of acetic anhydride reaches 95% or above, the nitration reaction yield is increased to 90% or above, and the three-step yield of 5-nitroguaiacol sodium salt is 80% or above.

A double-working-media natural circulating bin type solar dryer can realize high-efficient heating and dewatering of things to be dried by controllable indirect heating and convection drying manner on the premise of no consumption of auxiliary energy and no power drive during dewatering, drying and long-term safety storage. Further, by temperature regulating and dehumidifying, the inside environment of a storage device can be kept dry by natural ventilation, and damage caused by insects, birds and rats and dust pollution are prevented; energy saving, emission reduction and low-carbon effect are achieved, production management cost is reduced, and safety, sanitation and long-term storage of storage things are guaranteed. The double-working-media natural circulating bin type solar dryer is widely applicable to rural households and massive production and application in the fields of the industry and the agriculture.

The invention discloses a H9 subtype avian influenza virus Vero cell adapted strain and application of the Vero cell adapted strain in preparing of H9 subtype avian influenza vaccines. When being applied to Vero cells, viral multiplication speed and yield of the adapted strain are all superior to the existing avian influenza virus cultured through chicken embryos and superior to viral strains of non-naturalized H9 subtype avian influenza virus. The H9 subtype avian influenza virus Vero cell adapted strain can replace the chicken embryos to massively produce influenza viruses fast and has wideapplication prospect.

The invention discloses a method of preparing high purity zinc phosphate by a mechanical activation continuous reaction. The method comprises the following steps: S1, dissolving soluble carbonate or hydrogen carbonate and soluble zinc salt in water, separately to prepare a carbonate or hydrogen carbonate solution and a zinc salt solution; S2, mechanically activating the zinc salt solution and thecarbonate or hydrogen carbonate solution in a first reaction kettle synergically in a wet process for a reaction to prepare a precipitate; S3, conveying the precipitate and a solution to a second reaction kettle, adding a phosphoric acid solution, and carrying out a reaction in a mechanical activating condition in a synergic wet process to prepare zinc phosphate. The yield of the obtained productreaches 97.89-98.34%, the content of zinc phosphate dehydrate is 99.27-99.56%, the content of sulfate radicals is 0.032-0.041%, the content of chlorine ions is 0.028-0.042% and the content of lead is0.0012-0.0019%. Compared with the prior art, the output and quality of the product are superior.

The invention discloses a method for reducing the early bolting of Chinese angelica. The method includes selecting black soil and heilu soil with excellent conditions to perform sowing, the period ofcrop rotation being more than 3 years, performing shallow ploughing for one time before sowing, applying well-rotted farmyard manure, urea, diammonium phosphate and potassium sulfate before the soil is turned up, and killing pests; then transplanting seedlings, and selecting soybean seeds to perform dibbling; performing sterilization on the seedlings before transplanting, and performing air-dryingwhile performing soaking; performing transplanting in mid-to-late March, performing covering with wide films to perform dibbling, and planting one row of soybeans and three rows of Chinese angelica after mulching; during the transplanting of the Chinese angelica, respectively planting one seedling on the two sides of each hole, the distances of the terminal bud on the heads of the seedlings of the Chinese angelica from the mulching films being 2-3 cm, performing compacting with fine soil, and tightly sealing broken gaps; and during the dibbling of the soybeans, putting 2 soybean seeds in eachhole, performing compacting with the fine soil, and tightly sealing the broken gaps. The bolting rates after the intercropping of the Chinese angelica and the soybeans are lower than that of the monoculture of the Chinese angelica; the influence of different intercropping ratios on the bolting rates is different; when the Chinese angelica is intercropped with the soybeans in a ratio of 3:1, the bolting rate of the Chinese angelica is the lowest, which is only 26.06%; and the annual growth rate of the Chinese angelica can reach up to 66%.