35results about How to "Significant industrial application value" patented technology

The invention discloses a method for preparing methionine and sodium hydroxide through applying a bipolar membrane electrodialysis technology. The method comprises the specific process: diluting a methylthioethyl hydantoin (hydantoin) hydrolysate to one-third to one-fifth of the original concentration, and filtering with a microporous filter; then pumping the hydrolysate into one of a salt chamber or a salt/acid chamber of a bipolar membrane electrodialysis device, and injecting a certain concentration of an electrolyte solution into other compartments; connecting a cathode and an anode of the bipolar membrane electrodialysis device respectively with a negative electrode and a positive electrode of a direct-current power source, starting the bipolar membrane electrodialysis device, controlling the current density of a direct-current electric field to be 50-150 mA/cm<2> and the temperature at 20-40 DEG C, and thus obtaining methionine with higher purity in an acid chamber, wherein the methionine recycling rate reaches more than 95% and the current efficiency reaches about 70%; and at the same time, collecting obtained carbon dioxide, and thus obtaining sodium hydroxide with the concentration of 4-6% in an alkali chamber. The method has the advantages of high yield, no pollution, less use of raw materials, and good application prospects.

The invention discloses a supported nickel-based alloy catalyst as well as a preparation method and application thereof. The supported nickel-based alloy catalyst comprises a carrier and a nickel-based alloy supported by the carrier. The nickel-based alloy is a NixMyCz alloy, wherein x is greater than or equal to 1 and less than or equal to 10, y is greater than or equal to 1 and less than or equal to 10, and z is greater than or equal to 0 and less than or equal to 5; M is selected from at least one of iron, copper, cobalt, zinc, molybdenum, palladium, silver, gallium, indium, tin, germanium,bismuth and lead; in addition, when z is greater than 0, M is not indium, the total mass of the nickel-based alloy is 1 to 50 percent, and the balance is a carrier. The catalyst provided by the invention has the advantages of stable structure, good thermal conductivity, high permeability, high conversion rate, high selectivity, high activity, high mechanical strength, easiness in forming and filling, high throughput, low pressure drop and the like. The supported nickel-based alloy catalyst is a good catalyst for reactions for preparing methyl glycollate, ethylene glycol and ethanol by hydrogenation of dimethyl oxalate.

The invention provides a preparation method of a gold-based catalyst for preparing vinyl chloride by an acetylene hydrochlorination method and the catalyst prepared by the method. According to the catalyst, an activated carbon is used as a carrier, a complex formed by gold and a nitrogen-containing ligand is a main active component, compared with other gold-based catalysts, green solvents such aswater, ethanol and the like are utilized to replace acidic solvents such as hydrochloric acid, aqua regia and the like in the catalyst preparation process, and the gold in a high valence state is stabilized by the complexation of the nitrogen-containing ligand with the gold, thereby improving the effectiveness of the catalyst. The catalyst has high activity and vinyl chloride selectivity in the reaction of fixed bed acetylene hydrochlorination to prepare the vinyl chloride, the preparation method is green and environmentally friendly, and the method has a great industrial application value.

The invention discloses a method for preparing levodopa by virtue of an enzymic method. The method comprises the following steps: picking up an annular stenotrophomonas maltophilia strain slant for inoculation into a seed culture medium for culturing, thereby obtaining a primary seed liquid; inoculating a fermentation culture medium with the primary seed liquid at the inoculum size of 3-10% for fermentation culturing, centrifuging after the fermentation is ended and collecting bacterial cells; and adding tyrosine and the bacterial cells to a buffer solution to have an enzymatic reaction under the conditions of 18-30 DEG C and the pH of 5.0-6.0, thereby converting the tyrosine into the levodopa. According to the method, due to the resting cell transformation technology, and the preferred intermittent weak ventilation technology, adopted in the transformation process, the catalytic efficiency of the enzyme is improved; the concentration of the levodopa is 27g/L and the molar transformation rate of the tyrosine is above 99%; and besides, the method is mild in conditions, high in enantio-selectivity and free from racemization effect, is more suitable for industrial production, and has remarkable economic benefit and industrial application value.

The invention relates to a preparation method for a three-dimensional aminated carbon nonotube array/stretchable textile fiber electrode material. The preparation method comprises the following steps of placing textile fiber subjected to pre-treatment in a composite agent containing a dispersing agent and an aminated carbon nanotube in a room temperature, carrying out immersion and drying to obtain a conductive and stretchable textile substrate; placing the aminated carbon nanotube in an electricity processing liquid to obtain aminated carbon nanotube subjected to electricity processing; and uniformly coating the conductive and stretchable textile substrate with a graphene conductive adhesive, implanting the aminated carbon nanotube subjected to electricity processing into the surface of the substrate through single-surface static electricity to obtain the three-dimensional conductive electrode material, carrying out pre-baking and baking, and absorbing the aminated carbon nanotube floated on the surface to obtain the three-dimensional aminated carbon nanotube array/stretchable textile fiber electrode material. The method disclosed by the invention is simple in process, the cost can be substantially reduced, and meanwhile, mass production of a high-capacitance electrode is achieved.

The invention discloses a low-resolution image facial expression recognition method based on a feature reconstruction model, and belongs to the field of facial image expression recognition. The method comprises the following steps: constructing training and testing data sets; training a facial expression recognition model of the feature reconstruction model, extracting image expression features by using a feature extraction network with fixed parameters, training the model by using a generative adversarial network mode to obtain an expression feature generator and a feature discriminator, and reconstructing features by using FSRG as an input image to obtain FSR; classifying the feature FSR by a classifier consisting of a full-connection network and a softmax function layer, and re-weighting sample loss by using a probability value of a correct category corresponding to a sample output by the softmax layer; the invention is not sensitive to the resolution of the input image, the recognition accuracy under the low resolution is improved, and the recognition effect on each resolution is more stable.

The invention provides a preparation method of a high transparent degradable material. The preparation method is characterized by comprising the following steps of: 1) preparing raw materials: based on weight percent, weighing the following raw material components: 95-98 of polypropylene resin, 1-5 of polystyrene resin, 0.01-0.05 of food-grade benzoic acid and 0.1-0.5 of modified paraffin; 2) mixing the components to form a modified polypropylene resin mixing material; and 3) carrying out low-temperature standing on the modified mixing material for later use. The invention also discloses a method for preparing a suction tube by using the above materials. The method for preparing the suction tube comprises the following steps of: 4) preparing a suction tube extruding main machine and a round die head matched with the main machine; 5) feeding the modified mixing material in the extruding main machine to obtain a continuous round hollow suction tube; and 6) cutting the prepared continuous linear type suction tube to suction tube sections. The invention further provides the suction tube prepared by the method. The material provided by the invention is highly transparent and degradable, the method is scientific and reasonable, the production efficiency is high, the product property is good, and the cost is low.

The invention provides a preparation method of a high-performance thermochromic material, which is characterized by comprising the following steps: 1) preparation of raw materials: weighing 95-99.8 wt% of polypropylene resin, 0.1-4.9 wt% of thermochromic powder and 0.1-0.5 wt% of white oil; 2) component mixing: mixing the components at low temperature in a vacuum to form a polypropylene resin modified mixture; and 3) standing the modified mixture at low temperature to form a high-performance thermochromic material. The method for preparing suckers from the thermochromic material comprises the following steps: 4) preparing a sucker extrusion host machine and a die head matched with the host machine; 5) sending the modified mixture into the extrusion host machine to obtain the continuous linear sucker; and 6) cutting the prepared continuous linear sucker into suction tube sections, thereby obtaining the thermochromic suckers. The preparation method provided by the invention is scientific and reasonable, and has the advantages of high production efficiency, favorable product performance and low cost.

The invention relates to a method for producing water-insoluble organic acid by bipolar membrane electrodialysis. The method comprises the steps that a sodium sulfate aqueous solution is pumped into a bipolar membrane electrodialysis device to produce sulfuric acid and sodium hydroxide, the produced sulfuric acid is used for acidifying water-insoluble organic acid sodium salt to produce the water-insoluble organic acid and sodium sulfate, the produced water-insoluble organic acid solid is filtered and collected to obtain the required product, and the sodium sulfate aqueous solution used as a filtrate is used as a feed liquid to form a closed production loop. By the adoption of the method for producing the water-insoluble organic acid by the bipolar membrane electrodialysis, the full-closed and cycled clean production of the water-insoluble organic acid such as phenylglycine can be realized, so that chemical materials can be saved and a large number of high salinity wastewater can be avoided, the environmental pollution is reduced, and industrial application values and environmental benefits are obvious.

The invention provides a preparation method for biomass degradation material, which comprises the following steps: (1) preparing raw materials: weighing the following compositions of raw materials by weight percentage: 40 to 60 of major ingredient poly( butylene succinate), 40 to 60 of modified material polylactic acid and 0.1 to 20 of filler calcium carbonate master batch; (2) mixing the compositions to form modified poly( butylene succinate) mixture; and (3) statically placing the modified mixture at low temperature for standby application. The invention also discloses a method for manufacturing a magnetic powder catheter by adopting the raw materials, which comprises the following steps: (4) preparing a magnetic powder catheter extrusion main machine and a round die head matched with the main machine for use; (5) feeding the modified poly( butylene succinate) mixture into the extrusion main machine so as to manufacture a continuous round hollow magnetic powder catheter; and (7) cutting the continuous round hollow magnetic powder catheter into magnetic powder catheter sections. The invention also provides the magnetic powder catheter prepared by the method. The materials provided by the invention can completely degrade. The method is scientific and reasonable; the production efficiency is high; the product performance is good; and the cost is low.

The invention provides a preparation method of a high-transparency degradable material. The method is characterized by comprising the following steps of: (1) preparing raw materials, namely weighing the following raw material components in percentage by weight: 95-98 percent of polypropylene resin, 1-5 percent of polystyrene resin, 0.01-0.05 percent of food-grade benzoic acid and 0.1-0.5 percent of modified paraffin; (2) mixing the components to obtain a polypropylene resin modified mixture; and (3) standing the modified mixture at low temperature for later use. The invention also discloses a method for manufacturing a magnetic powder conduit by using the material. The method comprises the following steps of: (4) preparing a magnetic powder conduit main extruder and a circular die head used together with the main extruder; (5) feeding the modified mixture into the main extruder to obtain a continuous circular hollow magnetic powder conduit; and (7) cutting the obtained continuous linear magnetic powder conduit into magnetic powder conduit sections. The invention also provides the magnetic powder conduit manufactured by the method. The material provided by the invention is highly transparent and degradable. The method is scientific and reasonable, and has high production efficiency, high product performance and low cost.

The invention discloses a preparation method of a rosuvastatin calcium key intermediate, i.e. a compound as shown in a formula I. The preparation method comprises the following steps: a, carrying out a reaction between fluoroacetophenone and ethyl isobutyrate to prepare a compound as shown in a formula IV; b, carrying out a reaction between the obtained compound IV and methylguanidine hydrochloride as well as potassium hydroxide to obtain a compound as shown in a formula III; c, carrying out a reaction between the compound III and triethylamine as well as methanesulfonyl chloride to prepare a compound as shown in a formula II; d, carrying out a reaction between the compound as shown in the formula II and N,N-dimethylformamide as well as phosphorus oxychloride to obtain the compound as shown in the formula I. A reaction route of the preparation method is as shown in the following: (referring to the specification). The method disclosed by the invention has the advantages of being simple to operate, low in raw material price, high in availability of used raw materials, mild in reaction conditions, low in equipment requirements and production cost, easy for scale production and the like, and has significance industrial application value.

The invention provides a method for preparing cyclohexyl formic acid sulfonic acid from cyclohexyl formic acid sulfonate in process wastewater generated when caprolactam is produced by using a toluene method, by using a bipolar membrane electrodialysis technique. The method comprises the following step: converting cyclohexyl formic acid sulfonate in a cyclohexyl formic acid sulfonate solution into cyclohexyl formic acid sulfonic acid through bipolar membrane electrodialysis, wherein the bipolar membrane electrodialysis is achieved through three compartments, bipolar membranes, anode membranes and cathode membranes which are arranged alternatively; specific conditions are that the concentration of the cyclohexyl formic acid sulfonate solution is 5-30% (W/W), the voltage is 25V, the current density is 4-8A/dm<2>, and the reaction time is 3-4 hours. By adopting the method, a conventional concentrated sulfuric acid acidification method for preparing cyclohexyl formic acid sulfonic acid can be completely replaced, high-quality cyclohexyl formic acid sulfonic acid can be prepared, process steps are simple, meanwhile, pollution caused by a great deal of impurity sulfuric acid can be effectively avoided as parameter conditions are optimized, and remarkable industrial application values and environmental benefits can be obtained.

The invention discloses a synthetic method of a rosuvastatin calcium key intermediate. The synthetic method particularly comprises the following steps: carrying out a condensation reaction between fluoroacetophenone and ethyl isobutyrate under the condition of using sodium as alkali by using isopropyl alcohol as a solvent to prepare 1-(4-fluorophenyl)-4-methyl amyl-1,3-diketone; then carrying out a ring closing reaction between the 1-(4-fluorophenyl)-4-methyl amyl-1,3-diketone and methylguanidine hydrochloride by using isopropanol as a solvent to obtain 4-(4-fluorophenyl)-6-isopropyl-N-methyl pyrimidine-2-amine; carrying out a substitution reaction between the 4-(4-fluorophenyl)-6-isopropyl-N-methyl pyrimidine-2-amine and methanesulfonyl chloride by using dichloromethane as a solvent to obtain 4-(4-fluorophenyl)-6-isopropyl-2-[(N-methyl-N-methanesulfonyl) amino] pyrimidine; finally, carrying out a Vilsmeier reaction between the 4-(4-fluorophenyl)-6-isopropyl-2-[(N-methyl-N-methanesulfonyl) amidogen] pyrimidine and DMF (Dimethyl Formamide) as well as phosphoryl chloride to obtain a target compound. The method disclosed by the invention has the advantages of being simple to operate, low in raw material price, high in availability of used raw materials, mild in reaction conditions, low in equipment requirements and production cost, easy for scale production and the like, and has significance industrial application value.

The invention relates to a Sm2Co17 type rare earth permanent magnet material and a preparation method thereof. The Sm2Co17 type rare earth permanent magnet material consists of the following components in percentage by mass: Sm, heavy rare earth, Co, Fe, Cu and Zr. The preparation method comprises the following steps: preparing a samarium cobalt-based rare earth permanent magnet material sintered blank, heating the sintered blank to 1150-1200 DEG C by adopting microwaves at a heating speed of 15-90 DEG C/min in a protective atmosphere, carrying out solid solution and heat preservation, rapidly cooling by circulating gas to obtain a microwave solid solution blank, heating the solid solution blank to 820-880 DEG C by adopting microwaves at a heating speed of 15-90 DEG C/min, carrying out aging and heat preservation for 20-170min, and cooling. The method is reasonable in process design and convenient to operate, the preparation period of the Sm2Co17 type rare earth permanent magnet material can be greatly shortened, the prepared Sm2Co17 type rare earth permanent magnet material is better in magnetic performance, and remarkable industrial application value and economic benefits are achieved.

The invention relates to a novel monomer spice Mal-Val for cigarettes, a preparation method and an application thereof. The Mal-Val structure is as follows:. The present invention conducts the physical moisturizing performance test and internal sensory quality evaluation of the monomer fragrance, and finds that it can significantly improve the physical moisturizing performance of shredded tobacco, and at the same time significantly improve the sensory quality of cigarettes, reduce irritation and miscellaneous gas, and improve It enhances the mellowness of cigarette smoke.

The invention discloses a method for preparing a prasugrel intermediate 5-(alpha-cyclopropylcarbonyl-2-fluorobenzyl)-2-oxo-1,4,5,6,7,7a-hexahydrothieno[3,2-c]pyridine. The method comprises a following reaction route. As a result of experiments, the method provided by the invention has the advantages of simple operation, mild reaction conditions, low requirement on equipment, inexpensive and easy-to-obtain raw materials, high yield, and low production cost. An adopted solvent can synchronously recovered. The method can be easily applied in large-scale productions. The method meets the requirements of prasugrel industrialized production, and has industrial application value.