31results about How to "Suitable for production process" patented technology

The invention relates to a method for producing and synthetizing ammonia and methyl alcohol raw material gas by virtue of fixed bed intermittence type oxygenation nature gas, and the method is characterized by improving the concentration of oxygen in charged air of the traditional fixed bed intermittence gasification process to 22-65%. By utilizing the method, the defects of low blowing efficiency, low single-furnace output, high coal consumption, serious environment pollution, unstable oxygen enrichment continuous gasification operation, high gas carbon dioxide and methane and the like of the traditional intermittence gasification process are overcome, and the advantages of high enrichment continuous gasification gas production rate and low coal consumption are carried on, two gasification process advantages are innovatively integrated, and the purpose of playing up strengths and avoiding weaknesses is realized.

The invention provides a refrigerator with a double-layer door structure. The refrigerator comprises a refrigerator body, an inner-layer door, an outer-layer door, a lighting device, a lighting switchand a transition piece, wherein a storage compartment is defined in the refrigerator body, the inner-layer door is connected to the refrigerator body in an open and closed mode, a through hole is formed in the position, close to the edge, of the inner-layer door, the outer-layer door is connected to the outer side of the inner-layer door in an open and closed mode, the inner-layer door and the outer-layer door can be opened and closed independently or together, the lighting device is used for lighting the storage compartment, the lighting switch is arranged on the part, making contact with the inner-layer door, of the refrigerator body, the contact point position of the lighting switch is opposite to the through hole, the transition piece is integrally arranged in the through hole in a penetrating mode, and the length of the transition piece is larger than the length of the through hole, so that the two ends of the transition piece can abut against contact points of the outer-layer door and the lighting switch correspondingly. According to the refrigerator with the double-layer door structure, the lighting switch is closed or opened by using a mechanical structure, the structure is simple, switch control components are reduced, and the control program of a circuit is simplified.

The invention provides a preparation method of a latex product uneasy to bloom and adhere. The preparation method comprises the following steps: preparing a natural latex primary product, carrying outhypochlorite treatment, carrying out acetic acid treatment, carrying out alkali washing, carrying out water washing and drying. According to the preparation method provided by the invention, an anti-blooming agent is not used and the concentrations of used hypochlorite and acetic acid solution are relatively low; a processing technology is simple and the blooming and adhering problems can be completely solved; the hypochlorite and the acetic acid solution are environment-friendly reagents and are easily industrially produced, so that the problems in a latex industry that various compound agents are matched to generate a blooming phenomenon and the product is easy to adhere are radically solved and the preparation method has important practical significance.

The invention relates to electroluminescent devices comprising materials with a wide bandgap and their use.

The invention relates to the technical field of fine chemical engineering, and in particular relates to a preparation method of methyldimethoxysilane. The preparation method disclosed by the invention is characterized in that methyldichlorosilane and methanol sufficiently react in a packed tower by adopting a one-step esterification process, and Si-Cl bonds of methylhydrochlorosilane are completely converted into Si-O bonds, and the reaction efficiency is high; after the reaction is ended, a crude product is neutralized by hexamethylenetetramine, and then is filtered and distilled and the like to obtain a methyldimethoxysilane product with the mole yield of 99.5 percent or above. The mole yield of a product prepared by the preparation method disclosed by the invention reaches 95.0 percent or above, and the product is neutral, so the use of downstream customers is not affected; in addition, a used neutralizer does not react with the methylhydrochlorosilane or the methyldimethoxysilane product; by-produced hexamethylene tetramine hydrochloride does not cake, is proper in particle size and easy to filter, and is suitable for industrial production.

The invention relates to a repair welding process used after thread blind hole depth difference exceeding, and belongs to the technical field of transformer production. According to the technical scheme, as for through-top, protruding and too-thin thread blind holes, a pointed cone (4) is used for knocking through-top, protruding and too-thin parts at the back face of workpieces, the knocking force enables the parts to form conical grooves, and conical tips of the conical grooves cannot exceed conical ends of bottom holes; and the thread blind holes are filled with copper bars or asbestos cords, repair welding is carried out at the conical grooves, the repair welding thickness is slightly larger than that of the surfaces of the back faces of the workpieces, and then rubdown is carried out. The repair welding process has the beneficial effects that repairing after the bottom holes of the thread blind holes of the parts are too deep is achieved, the parts can be rapidly desterilized while the original reliable sealing thickness of the parts is recovered, the material cost and the maintaining cost for flange replacement are reduced, and the repair welding process is particularly suitable for the transformer production process.

The invention discloses a fused bisindole derivative and a preparation method thereof. The preparation method provided by the invention comprises the following steps: adding an indole compound, sodiumnitrite and potassium persulfate into a solvent for reaction; and then, adding triethyl phosphite to obtain a product fused bisindole derivative. In the invention, the indole compound is used as a starting material; the raw materials are easily available and diversified; the obtained target product can be used directly and can also be used for other further reactions; sodium nitrite is used as anitrosating agent in the invention, is safe to use and cheap, reduces pollution and production costs, and meets requirements of green production; the preparation method disclosed in the invention is mild in reaction condition, simple in reaction operation and post-treatment process, stable and controllable in reaction process, high in product yield, and suitable for mass production.