38results about How to "Strong process practicability" patented technology

The invention discloses a synthetic method for solvent violet 13, and develops a new route for synthesizing violet 13 by employing a one-pot process. The method comprises successively adding methanol, 1,4-dihydroxyanthraquinone, 4-nitrotoluene, iron powder and boric acid into a pressure container, sealing the container and performing nitrogen displacement, then heating with stirring, introducing hydrogen for hydrogenation reduction, after the reaction system stops absorbing hydrogen, performing warm-keeping reaction, heating after the reaction is finished, performing condensation reaction, cooling after the reaction is finished, releasing the pressure, introducing air and performing oxidation reaction, and finally adding hydrochloric acid for beating, filtering, washing and drying, so as to obtain violet 13. According to the method, the initial raw material p-toluidine is replaced by 4-nitrotoluene, direct usage of the highly-toxic raw material p-toluidine is avoided, and the synthetic technology is low in toxicity and friendly to environment. By pouring all of the raw materials into the container, the postprocessing process of the intermediate step is saved, and a large amount of manpower and material resource is saved.

The invention relates to an integrated braided film-covered stent edge trimming process, which belongs to the technical field of medical devices; it includes a starting edge trimming process and an end end edge trimming process; a "two-step finishing method" is used to mix metal and polymer fiber materials The one-piece braided stent graft has been trimmed. Through the "two-step finishing method" edge trimming process, the end of the integrated braided stent graft can be trimmed smoothly, and the supporting performance of the stent graft can be improved to a certain extent. The technology is simple, practical, and creative; its application will be conducive to promoting the industrialization of binary mixed-weaving integrated stent grafts.

The invention relates to a low-dielectric porous mullite wave-transmitting material and a preparation method thereof. The porous mullite wave-transmitting material has a closed-pore structure, and its porosity is 30-70%, preferably 30-51%.

The invention relates to a method for recycling waste silicon slag discharged in production of zirconyl chloride and belongs to a method for recycling waste slag discharged in the preparation process of a zirconium compound. The method is characterized by comprising the following steps of: firstly, converting waste silicon slag into an aqueous solution of sodium silicate, filtering, and then using the residue filtered out directly as a raw material for preparing the zirconyl chloride product; performing crystallization treatment on the filtrate, filtering the crystallized product, drying the obtained filter cake, and preparing all of the filter cake into a 4A molecular sieve product; and then realizing complete recycling of the waste silicon slag. The method for recycling waste silicon slag discharged in the production of zirconyl chloride provided by the invention is low in equipment investment and simple and convenient in operation steps. As a result, the environmental pollution of the waste silicon slag discharged in the production of zirconyl chloride in the prior art on soil, water and atmosphere is avoided. The production cost of the zirconyl chloride is obviously reduced, the economic benefit of a zirconyl chloride production enterprise is improved and the development of the zirconyl chloride industry is promoted.

The invention relates to an integrated braided film-covered stent edge trimming process, which belongs to the technical field of medical devices; it includes a starting edge trimming process and an end end edge trimming process; a "two-step finishing method" is used to mix metal and polymer fiber materials The one-piece braided stent graft has been trimmed. Through the "two-step finishing method" edge trimming process, the end of the integrated braided stent graft can be trimmed smoothly, and the supporting performance of the stent graft can be improved to a certain extent. The technique is simple, the practicability is strong, and the creativity is outstanding; the application of the present invention will be beneficial to promote the industrialization of the binary mixed braided integrated stent graft.

A fluteless rolling technology for rolling steel section includes sequentially determining 14 technological parameters including total cross-section shrinkage ratio of the workpiece to be rolled, the pressing down size of each pass, total number of passes, 5 correcting coefficients, etc, and rolling by fluteless rolling mill while regulating the clamp to the workpieces.

The invention discloses a method for manufacturing an all-polymer planar optical path, which includes the following steps: (1) using ultraviolet lithography and deep etching technology to obtain an initial original mold, then duplicating a metal nickel mold by electrochemical deposition, and then using a micro mold Plastic method to make polymer microstructure parts; (2) Use thermal annealing process to process the parts in sections to reduce the roughness of the side wall and reduce the scattering loss in light wave transmission; (3) Coating and filling polymer dielectric materials , to form the core structure of the planar optical path after curing; (4) Use the polymer glue layer as the binding layer of the component, and then combine the binding layer with the optical polymer substrate to realize the preparation of the buried ridge type polymer planar optical path. Compared with the preparation method of the traditional polymer plane optical path, the invention reduces the cost, and the technique has strong versatility for materials.

The invention relates to a preparation method of a tungsten nickel iron alloy metallographic phase, which belongs to the technical field of determination of a material surface structure. A machining method is mainly adopted to obtain a metallographic phase tissue structure of tungsten nickel iron alloy. The preparation method comprises a sample preparation step, a grinding step and a polishing step. In the sample preparation process, the tungsten alloy is cut into a sample piece, and after the cold mounting is performed on the sample, a remaining surface metamorphic layer in the electric sparkmachining is removed. In the grinding process, the tungsten alloy sample is inserted into an epoxy resin clamp, the surface of the sample is ground, after the grinding, the sample is ground by adopting diamond spray or diamond grinding paste, and finally the sample is ultrasonically cleaned. In the polishing process, after the sample is polished, the sample is ultrasonically cleaned and dried. According to the preparation method of the tungsten nickel iron alloy metallographic phase prepared in the invention, after the grinding and polishing, the metallographic phase observation can be performed without chemical corrosion, and the obtained metallographic phase is clear and complete in tissue structure and has no defects such as over-corrosion or corrosion pits; and the whole preparation process is safe and environmentally friendly, the operability is high, and the preparation process is simple and reliable.

The invention discloses a field electron emission cathode array based on a molybdenum substrate and a preparation method thereof. According to the invention, an etching mask is firstly formed on a molybdenum substrate; then high density plasma dry etching is carried out to the molybdenum substrate to form molybdenum pointed cones. The molybdenum pointed cones are directly formed on the substrate; the problem of poor adhesion with underlay is thoroughly solved; heavy current and strong electric field can be borne; high rate isotropic etching is carried out to the molybdenum body material through the high density plasma dry etching method; therefore large area appearance accordant molybdenum pointed cone arrays can be obtained at the same time; large area even emission can be realized; only primary etching is contained in the manufacturing process of the field electron emission cathode array; the pointed cone centers and gate hole centers are automatically aligned without deflection; compared with the prior art, the technical solution of the invention is featured by few procedures, high efficiency, simplicity and low cost and is applicable to large scale preparation.