35results about How to "Suitable for large-scale production requirements" patented technology

The invention belongs to the technical field of chemical synthesis and particularly relates to a preparation method of 4,5-dicyan base-2-trifluoro-methylimidazole and a prepared intermediate and salt thereof. Diaminoaleo dinitrile and trifluoroacetic acid ester are subjected to aminolysis of ester with solvent or without solvent, amide is obtained, the amide is then subjected to intramolecular dehydration, a crude product of the 4,5-dicyan base-2-trifluoro-methylimidazole is obtained, after the crude product is purified, high-purity dehydrate of the 4,5-dicyan base-2-trifluoro-methylimidazole is obtained, then the high-purity dehydrate is mixed with water phase suspension liquid of salt of metal elements and stirred for a reaction, after the reaction is ended, filtering is conducted to remove an undissolved substance, filtrate is evaporated to be dry in a rotary evaporation mode, after dissolution with solvent is conducted again, filtering, rotary evaporation and vacuum drying are conducted, and the high-purity 4,5-dicyan base-2-trifluoro-methylimidazole salt is obtained. The condition of the whole technological process is safer and milder compared with those of other processes for producing the 4,5-dicyan base-2-trifluoro-methylimidazole, and the preparation method meets the requirement for scaled production.

The invention provides an I / O connector with a detection function and a manufacturing method thereof. The manufacturing method includes the steps that (100) detection terminal sets are integrally formed on a metal material strip, and each detection terminal set comprises a plurality of mutually connected detection terminals; (200) the detection terminal sets are integrally formed in a first insulator, the first insulator is provided with multiple terminal window holes and a plurality of cutting-off holes, and the detection terminals are arranged in the terminal window holes; (300) metal connection plates between the detection terminals in the cutting-off holes are cut off; (400) a second insulator is wrapped with a shielding shell, an insertion space is formed, multiple signal terminals are arranged on a tongue plate of the second insulator, the first insulator is arranged on the surface of the shielding shell, and butting portions of the detection terminals penetrate through holes in the shielding shell and extend into the insertion space. The I / O connector has the advantages of shortening production time, being suitable for meeting the requirement of large-scale production, prolonging service life and the like.

The invention discloses a method for preparing an aluminum bronze and steel bimetallic material, wherein the method comprises the following specific steps that: aluminum bronze powder is subjected to acid cleaning treatment; the silicon bronze powder with silicon content being 1-5% is added into the treated aluminum bronze powder, and the mixture is subjected to ball milling so as to be uniformlyblended; the above uniformly blended powder is tiled on an electro-coppering surface of a steel plate; the steel plate with tiled powder is subjected to primary sintering; then the steel plate is subjected to secondary sintering after cold rolling. The test shows that the relative density of aluminum bronze in the aluminum bronze and steel bimetallic material can reach 99.5%, and the interface bonding strength is more than 85 MPa; in addition, the method has the advantages of low equipment investment, higher rate of finished products, simplicity in operation and lower production cost and the like, thereby meeting the requirement of large-scale production; and the method has industrial application value.

The invention discloses a high-purity difluorosulfonylimide preparation method, which comprises: 1, adding a protic solution accounting for 0.1-10% of the mass of a difluorosulfonylimide crude productto the difluorosulfonylimide crude product, carrying out a thermal insulation reaction for 10 min-10 h at a temperature of 10-120 DEG C, and slowly introducing HF gas accounting for 0-10% of the massof the difluorosulfonylimide crude product during the thermal insulation; and 2, distilling the difluorosulfonylimide obtained in the step 1 to obtain the high-purity difluorosulfonylimide with a chlorine ion content of less than 20 ppm. Compared with the conventional direct distillation and rectification schemes, the method of the present invention has the following characteristics that the chemical treatment method of selective decomposition is adopted, the physical separation is supplemented, and the difference in the boiling points of each substance in the system after the treatment is high, such that the separation effect of the scheme is significant, the impurity chlorine ion content in the product difluorosulfonylimide can be reduced to less than 20 ppm, and the raw material purityrequirements in the preparation of lithium bis(fluorosulfonyl)imide for subsequent electrolytic solutions can be met.

The invention provides a method for preparing a large-size ceramic biscuit. The method includes the steps that firstly, preprocessed ceramic slurry with uniformly scattered gel systems is injected into a forming die to undergo in-situ solidification to obtain ceramic biscuit gel, the forming die is sealed so that the ceramic biscuit gel can be desolventized at the temperature of 30-80 DEG C and shrinks for twenty hours, and after seven days, drying processing is carried out and the large-size ceramic biscuit is obtained.

A Chinese medicine for treating prostatoplasia, prostatitis, cystitis, calculosis in urinary system, chronic nephritis, urinary retention, etc is prepared from mole cricket and imperata rhizome.

The invention discloses a method for preparing a high-purity agaricus blazei murrill polysaccharide and provides a method capable of obtaining high content of the agaricus blazei murrill polysaccharide and suitable for large-scale production. The method comprises the following steps of: adding cellulase and pectinase to an agaricus blazei murrill powder; after adding water to the agaricus blazei murrill powder and uniformly stirring the water and the agaricus blazei murrill powder, regulating the pH value of a mixture to 6.0+ / -0.1; performing enzymolysis on the mixture for 40 minutes; carrying out microwave extraction on the mixture; freezing and drying agaricus blazei murrill water extract so as to obtain a concentrated product; carrying out decolorizing and primary impurity removal treatment on an agaricus blazei murrill polysaccharide extract solution by using a macroporous adsorbing resin; and then carrying out deproteinization treatment on the agaricus blazei murrill polysaccharide extract solution by using an ion exchange resin; further purifying the agaricus blazei murrill polysaccharide after deproteinization by using an ultrafiltration technology, so as to eliminate micromolecular water soluble substances; pre-freezing an agaricus blazei murrill polysaccharide ultrafiltrate to -60 DEG C; maintaining the agaricus blazei murrill polysaccharide ultrafiltrate at -60 DEG C for at least 4 hours; and drying the agaricus blazei murrill polysaccharide ultrafiltrate at -45 DEG C in a vacuum state so as to obtain the agaricus blazei murrill polysaccharide. Through the adoption of a microwave synergistic complex enzyme method, a resin deproteinization technology, an ultrafiltration process purification and freeze-drying technology, which are combined with each other, the purity of the agaricus blazei murrill polysaccharide reaches 90%.

The invention belongs to the field of powder metallurgy, and particularly relates to a preparation method for in-situ generation of an MgO dispersion strengthened ultra-fine grain Al-Mg alloy. According to the technical scheme of the preparation method, the preparation method includes the following steps that Al powder and Mg powder are weighed, wherein solute Mg atoms account for 0-8 at.% of atoms of the alloy; ball-milling is performed, wherein firstly the powder is sufficiently mixed for 6 h through a planetary ball mill at a low running speed, and the rotating speed is 180-220 r / min; thenthe mixed powder is subjected to ball milling for 36 h at a high running speed, the rotating speed is 480-520 r / min, and no intermittence exists in the high-energy ball milling period; passivation treatment is performed, wherein pressing into powder blank is performed; heating to 500 DEG C is performed, then heat preserving under 500 DEG C is performed for 2 min, after heat preserving ends, the heated powder blank is immediately transferred into a preheated extruding die, and the powder blank is subjected to hot extruding to form a hot extruded rod with the diameter being 6 mm; and heat treatment is performed. The alloy prepared through the preparation method has the beneficial effects of being low in density, high in strength, high in elastic modulus, superfine in microscopic structure and clean in particle interface.

The invention belongs to the technical field of organic synthesis, and relates to a preparation method of 2,3-disubstituted indole compounds. In an organic solvent, under the condition of monovalent copper as a catalyst, the anilines substituted by ortho propargyl alcohol are catalyzed. The compound undergoes cyclization series reaction with dicarbonyl compounds to prepare 2,3-disubstituted indole compounds. In the present invention, a cheap copper catalyst is used to prepare 2,3-disubstituted indole compounds, the reaction hardly generates other by-products, and the product yield is not lower than 62%. The reaction conditions of the preparation method are mild, green, and the reaction efficiency is high, which is more suitable for large-scale production requirements, and the prepared 2,3-disubstituted indole compounds have potential physiological activities.