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

Nanometer selenium hydrosol having antitumor activity, preparation method, preservation method and applications thereof

The present invention relates to the technical field of nanometer selenium hydrosols, particularly to a nanometer selenium hydrosol having antitumor activity, a preparation method, a preservation method and applications thereof, wherein the hydrosol at least contains nanometer selenium with a concentration of 0.5-5.0 mmol / L, and Coriolus versicolor polysaccharide protein with a concentration of 100.0-600.0 mg / L. The preparation method at least comprises: S01, adding a solution containing selenium ions and / or selenous ions to a Coriolus versicolor polysaccharide protein aqueous solution; S02, adding a reducing agent solution to the mixed solution obtained in the step S01 in a dropwise manner, and shaking; and S03, carrying out volume metering on the product obtained after the reducing reaction, and carrying out dialysis treatment. According to the present invention, the hydrosol is stable at a temperature of 2-10 DEG C; and the Coriolus versicolor polysaccharide protein has the hydrophilic hydroxyl and the hydrophilic amino, and the two groups can enhance the affinity between the nanometer selenium and the cancer cells, and can improve the uptake on the nanometer selenium by tumor cells so as to achieve the whole treatment effect of medication dosage reducing, treatment effect improving and less toxic-side effect, such that the effective scheme is provided for the combination chemotherapy of cancers in the clinic.
Owner:THE HONG KONG POLYTECHNIC UNIV SHENZHEN RES INST +2

Method for molding via hole of printed circuit board

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.
Owner:美龙翔微电子科技(深圳)有限公司

Method for treating tin-copper slag through whole wet method

The invention discloses a method for treating tin-copper slag through a whole wet method. The method comprises the following steps of: performing oxygen-pressure alkaline leaching on tin-copper slag through sodium hydroxide or potassium hydroxide, wherein a liquid-solid mass ratio is (3-12) to 1, initial alkaline concentration of alkaline liquor is 60-200g/l, reaction temperature ranges from 110 DEG C to 150 DEG C, reaction is performed for 2-6 hours, and reaction pressure is 1-2 MPa; getting leach liquor which is a sodium stannate solution or a potassium stannate solution, adding tin to replace stibium and copper, adding sodium sulfide to remove lead, purifying the solution, evaporating, concentrating, cooling and crystallizing the purified solution to obtain a stannate product; washing leach residues, performing sulfuric acid normal-pressure leaching, and separately generating a secondary leach liquor copper sulfate solution and secondary leach residue tin concentrate, wherein acidity of H2SO4 is 50-150g/l, a liquid-solid mass ratio is (2-10) to 1, and a leaching temperature is 40-95 DEG C; evaporating, concentrating, cooling and crystallizing the copper sulfate solution to obtain a copper sulfate product, drying and returning the tin concentrate to a tin smelting system. The method can generate a stannate product, and also can effectively separate copper in the tin-copper slag.
Owner:云南锡业研究院有限公司

Lithium bis(oxalato)borate preparation method

The invention provides a lithium bis(oxalato)borate preparation method. The preparation method comprises the steps: weighing lithium hydroxide, oxalic acid and boric acid according to a certain molarratio; then respectively drying lithium hydroxide, oxalic acid and boric acid; then putting the dried lithium hydroxide, oxalic acid and boric acid into a ball mill to be evenly ball milled to form amixture; then dry pressing the mixture into pieces under the certain pressure P; then putting into a container; reacting under the vacuum environment with a temperature as 105 to 130 DEG C for 5 to 8h; then putting into the vacuum environment with a temperature as 140 to 170 DEG C to react for 12 to 24 h to prepare a lithium bis(oxalato)borate crude product; then grinding the lithium bis(oxalato)borate crude product into powder; fully dissolving into distilled anhydrous acetonitrile; filtering to obtain filtrate; evaporating and concentrating the filtrate until the residual liquid is 1 to 2%of the total amount of the filtrate; finally, pouring the residual liquid and drying a product which is prepared by evaporating and concentrating the filtrate to obtain lithium bis(oxalato)borate. According to the method disclosed by the invention, a technology is simple, the raw materials are cheap and easy to obtain, and the purity of the prepared product is extremely high.
Owner:湖南科霸汽车动力电池有限责任公司

Process for preparing mannich base quaternary ammonium salt high-temperature resistant corrosion inhibitor and applications thereof

The present invention discloses a process for preparing a Mannich base quaternary ammonium salt high-temperature resistant corrosion inhibitor and applications thereof. The preparation process comprises the following steps: (1) dissolve an amine substance indole, benzhydrylpiperidine, diphenylethylamine, dibenzylamine or diisopropanolamine into an organic solvent, slowly add an aldehyde substance 3-(2-thienyl)benzaldehyde or cinnamaldehyde, then place in a constant-temperature water bath, stir to react at 60-80° C. for 1 to 3 hours, then add a ketone substance benzalacetone, diphenylstyryl acetone or 1,1-diphenylacetone, adjust the reaction system pH to 3 to 4 using a hydrochloric acid solution, and then react for 7 to 10 hours; after cooled to room temperature, perform distillation under a reduced pressure to remove the solvent, to obtain a Mannich base; (2) dissolve the Mannich base in an organic solvent, add quaternizing reagent chloromethylnaphthalene, benzyl chloride or triphenylchloromethane, then react at 70-90° C. for 14-16 h, after cooled to room temperature, perform distillation under a reduced pressure. The process is simple and feasible, and its raw material is non-toxic, safe and environmental-friendly, and the prepared corrosion inhibitor has obvious resistance to the acid corrosion of carbon steels in oil-gas wells.
Owner:SOUTHWEST PETROLEUM UNIV

Process for extracting and purifying podophyllotoxin from Dysosma difformis

The invention relates to a process for extracting and purifying podophyllotoxin from Dysosma difformis, which comprises the following steps: crushing rhizomes of the Dysosma difformis into coarse powder, pretreating the Dysosma difformis coarse powder with organic solvents, extracting with hot water by reflux, continuously extracting filter residue by hot reflux, filtering again, merging the two filtrates, recovering the organic solvents, adding a defined amount of water to maintain a constant volume so as to obtain a podophyllotoxin extracting solution; and preparing the podophyllotoxin extracting solution into a solution the crude drug content of which is 0.12-0.18g / mL, selecting a purified macroporous adsorptive resin as the adsorption column resin to sufficiently adsorb the solution acting as a sample solution, respectively and sequentially washing off impurities with water and 10% ethanol, eluting with a strippant, collecting the eluted part, recovering the strippant, and adding a defined amount of water to maintain a constant volume so as to obtain a podophyllotoxin purified solution. The organic solvents used in the process are nonpoisonous and can be recovered, and no three wastes polluting the environment are produced. The whole process is green and environment friendly and has the advantages of simple operation and easy industrialization, and the purity of the podophyllotoxin obtained by the process is above 98%.
Owner:CENT SOUTH UNIV
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