159results about How to "The process is simple and feasible" patented technology

The disclosed method to extract I2 from kelp comprises: with fresh kelp as material, cutting up, adding 200wt% water to dip for 30-50min; putting soak into pond, adjusting pH value with alkali, while filling gas to stir and then filter to obtain the clear liquid with I2 and mannitol; acidifying and oxidizing to obtain dissociative I2 and then adsorb with basic anion exchange resin; desorbing the I2 on resin with Na2S2O3; adding strong H2SO4 and KClO3 to separate out coarse I2; cleaning, and refining with 25wt% strong H2SO4 at 140Deg to obtain the refined iodine. This invention reduces cost and source.

The invention relates to a diesel vehicle oxidization catalyst, which includes noble metals comprising, but not limited to one or more of Pt, Pd, Rh and the like. The diesel vehicle oxidization catalyst includes a front end and a rear end, wherein the palladium content of the front end is higher than that of the rear end. The oxidization DOC catalyst is matched with SCR and can oxidize NO into NO2at low temperature, so that catalytic initiation temperature of HC and CO is reduced as most as possible, and the capability of oxidizing NO into NO2 at a low temperature (200 DEG C) is enhanced. A corresponding method is also provided in the invention, which is easy to carry out and is low in cost.

The invention relates to a method for molding a via hole of a printed circuit board, which comprises the steps of: film attachment, in which the surfaces of upper and lower surface copper layers of an insulating dielectric layer drilled with the via hole are attached with photosensitive films, and the positions, which correspond to the via hole, on the photosensitive films are provided with film openings; hole-sealing electroplating, in which an orifice end, which is near a first surface, of the via hole is closed through a copper electroplating process on the first surface of the insulating dielectric layer; hole-filling electroplating, in which the via hole is completely filled with copper, and the filled copper is connected with the surface copper layer of a second surface of the insulating dielectric layer, namely the connection of solid via holes between upper and lower adjacent line layer patterns is realized; and the post-treatment, in which the two surfaces of the insulating dielectric layer are subjected to subsequent treatment respectively, and a level conducting surface which is convenient for implementing subsequent pattern line production working procedures is obtained by removing the photosensitive films, removing the filled copper higher than the surface copper layers, and leveling the board surface. The method has the advantages of simple, convenient and feasible process, low cost, and small area occupation, and upper and lower corresponding line rackets of the hole are integrally preserved, are not damaged by the via hole and have good electrical properties.

The invention discloses a polyamide powder for laser sintering and a preparation method thereof. The preparation method is characterized by comprising rapidly cooling a polyamide solution to a temperature lower than the crystallization temperature of polyamide by 15-20 DEG C, then heating to the crystallization temperature of polyamide, and slowly cooling until polyamide powder is precipitated. The difference value of the initial melting temperature Tmo and the initial crystallization temperature Tco of polyamide powder prepared by employing the method is increased, the powder is narrow in particle size distribution and good in fluidity, and the polyamide powder is especially suitable for selective laser sintering.

The invention provides a general flavanone capsule of desmodium styracifolium and a preparation method and application thereof, wherein the general flavanone capsule of the desmodium styracifolium comprises total flavanone of the desmodium styracifolium, which is an alcohol extract of the desmodium styracifolium, and pharmaceutically acceptable medicinal excipients. The general flavanone capsule of the desmodium styracifolium disclosed by the invention has the characteristics of being explicit in effective material basis, controllable in quality standard, good in drug dissolution degree, good in quality stability, significant in pharmacology and drug efficacy, less in dosage, safe and convenient to take, and completely applicable to industrial massive production.

The invention discloses a selective laser sintering scanning method. When a sharp corner is met in a selective laser sintering process, a sealed curved-form empty jump is adopted to change the scanning direction, and the scanning speeds at the front and back of the corner are guaranteed to be consistent, thus uniform laser scanning intensity and scanning accuracy of the sharp corner are guaranteed.

The invention discloses a process for recycling asphalt from an asphalt mixture. The process comprises three steps of impurities removal, asphalt extraction and distillation and recovery of an asphalt solution, and thus recovered asphalt can be obtained. An asphalt-trichloro ethylene solution is vacuumized to reduce pressure and heated to accelerate evaporation; the evaporated trichloro ethylene is condensed after being contacted with circulating water and enters a solvent-recovering bottle so as to be separated from the asphalt; a distilling flask is kept in a vacuum state, so that secondary ageing of the asphalt can be prevented; and the process is simple and practicable in steps and has very good popularization value.

The invention discloses a clopidogrel tablet and a preparation method thereof. The clopidogrel tablet is a coated tablet which consists of a clopidogrel table body and a coating material, wherein the clopidogrel table body comprises the following ingredients in parts by weight of clopidogrel free alkali: 75 parts of pharmaceutically acceptable salt of clopidogrel, 6-9 parts of sodium stearyl fumarate, 3-6 parts of talcum powder, 90-135 parts of diluent, 2-6 parts of bonding agent and 7-17 parts of disintegrating agent, wherein the diluent is made of combined mannitol and microcrystalline cellulose in a weight ratio of (2:1)-(1:1); the weight of the coating material accounts for 2.7-3.3% of the weight of the clopidogrel tablet. By adopting the clopidogrel tablet, not only is the problem of sticking in the tabletting process solved, but also the mixed lubricant and clopidogrel have good compatibility, the phenomena that active ingredients are degraded or the configuration is inversed are avoided, and the clopidogrel tablet is high in stability, good in quality, and high in similarity in dissolving behavior to that of an original triturate plavix.

The invention provides a packaging method of an electrochromic module. The packaging method comprises the following steps of: providing a laminated structure, wherein the laminated structure comprisesa first substrate, a first conductive layer, a color-changing material layer, a second conductive layer and a second substrate which are sequentially laminated; forming a groove in the laminated structure, wherein the groove penetrates through the second substrate, the second conductive layer, the color-changing material layer and the first conductive layer; and forming a sealant in the groove. The packaging method of the electrochromic module provided by the embodiment of the invention is simple, convenient and feasible in process, and the formed rubber frame structure is high in packaging reliability and is compatible with a front-end process flexible electrochromic film material (semi-finished product) process.

The invention provides a medicinal composition as well as a preparation method and application thereof. The pharmaceutical composition is a medicinal preparation for clinical administration, which is prepared from desmodium styracifolium general flavone extract serving as an active component and pharmaceutically acceptable medicinal auxiliaries. The composition can be used for preparing clinical treatment medicament for clearing damp-heat, promoting diuresis and expelling stone (damp-heat stagnation).

The invention discloses a preparation method of a steel rod of a rod mill, belonging to the field of wear-resistant materials. The steel rod of the rod mill comprises the following components in percentage by mass: 0.6-0.85% of C, 0.17-0.37% of Si, 0.7-1.2% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.6% of Cr and 0.01-0.02% of Nb. The preparation method of a grinding rod comprises the steps of smelting, continuously casting a round billet, and rolling round steel with the diameter of 50-120mm and the fixed length of 2-7m by using a TMCP (Thermal Mechanical Controlled Process); directly quenching in water for 5-10min by utilizing waste heat after rolling; then, tempering at low temperature. The method can be used for obtaining the grinding rod which has gradient hardness, the surface hardness of HRC60 and the core hardness of HB200 and the steel rod which is high in surface hardness, good in wear resistance, relatively high in core toughness and favorable in matching between hardness and toughness. The method disclosed by the invention is simple in process, high in efficiency, low in energy consumption, low in cost and capable of realizing actual industrial production and application.

The invention belongs to the technical field of biology and particularly relates to an L-isoleucine hydroxylase gene capable of specifically catalyzing L-isoleucine to generate (2S, 3R, 4S)-4-hydroxyisoleucine and a genetically engineered bacterium containing the gene. When the bacterium is used for producing (2S, 3R, 4S)-4-hydroxyisoleucine, defects such as low extraction ratio, difficulty in separation and purification, high raw material quality demand, high cost and the like existing in an extraction method can be overcome; the problems of harsh reaction conditions, more steps, difficulty in separation and low yield existing in a chemical synthesis method can be solved; the problems of low conversion rate and large-quantity alpha-aminobutyric acid and other byproduct production existing in an enzyme method can be solved, 4-hydroxyisoleucine with only one configuration, i.e., (2S, 3R, 4S)-4-hydroxyisoleucine, exists in a fermentation solution, and the conversion efficiency is further increased by using an L-isoleucine hydroxylase encoding gene over-expression method, so that the aims of simplifying processes and reducing the production cost are achieved.

The invention discloses an aspergillus niger which is classified and named aspergillus niger M1 with the preservation number being CCTCC NO: M2014421. The preservation date is September 23nd, 2014, and the preservation department is China Center for Type Culture Collection. Alpha-glucosidase produced by the aspergillus niger M1 strain is endoenzyme, and the aspergillus niger M1 strain can produce isomaltose hypgather containing more than 65% of active trisaccharide (IG+P+IG3) under the condition of high temperature. The required reaction time of preparing IMO-500 type isomaltose hypgather containing 35% of active trisaccharide is only half of the reaction time of preparing the isomaltose hypgather containing more than 65% of active trisaccharide. The alpha-glucosidase produced by the strain has advantages of excellent temperature characteristic, short glucoside conversion time, high content of the active trisaccharide in the product and the like.