41 results about "Tetrafluorohydrazine" patented technology

The invention discloses a catalyst for preparing 1,3,3,3-tetrafluorohydrazine propylene from 1,1,1,3,3-perfluoropropane. The composition is MxOy/AlF3, wherein a carrier AlF3 is an active carrier which is of an alpha phase structure, has the specific surface area greater than 150 m<2>.g<-1> and has the aperture distribution concentrated at 15 to 40 nm; MxOy is one of MgO, Fe2O3, Co2O3 or CuO; the mole ratio of MxOy to AlF4 is 1: (5 to 50). A preparation method of the catalyst comprises the following steps: carrying soluble salt of any element of Mg, Fe, Co or Cu through active alpha-phase AlF3 which has a large specific surface area and a mesoporous structure and serves as the carrier via an equivalent immersion method, and preparing the catalyst through drying and high temperature roasting. The catalyst disclosed by the invention is excellent in performance; in a preparation process, no expensive noble metal compounds are needed, the cost is low, and the activity is high; during reaction at 280 DEG C, the conversion ratio of the 1,1,1,3,3-perfluoropropane is 70 percent or above, and the catalyst is long in service life and can stably work for 360 hours; meanwhile, no diluting gas is fed in the reaction process, and the catalyst has industrial application value.

The invention relates to a polyimide material and a preparation method thereof. The polyimide material comprises diamine monomers, namely 2-(3,5-diaminophenyl)-4 and 5,6,7-(tetrafluorohydrazine isoindoline)-1,3-diketone. The preparation method comprises the steps of mixing the monomers and other aromatic diamines containing strong electron withdrawing groups, and then, reacting the mixture and fatty acid dianhydride to obtain polyimide. Fluorine atoms and the strong electron withdrawing groups are introduced to the structures of the diamine monomers, and meanwhile the diamines containing the strong electron withdrawing groups and the fatty acid dianhydride are used as polymerization monomers, so that the formation of intramolecular/intermolecular charge transfer complexes (CTC) is further inhibited, and the transparency of the polyimide is remarkably improved. The polyimide material prepared by using the preparation method has the advantages of high transparency, high glass transition temperature and favorable solubility and heat resistance and the like and has a wide application prospect in the relevant fields of flexible transparent substrates, flat panel displays and the like.

The invention belongs to technical field of steel lining tetrafluorohydrazine cage hoop equal steel compound technologies, and particularly discloses a steel lining tetrafluorohydrazine cage hoop equal steel compound technology. For solving the problems of PTFE lining layer falling, bulking and dented suction and expansion deformation in the prior art, the technology comprises the following technological steps that die pressing is carried out, a workpiece shell is pressurized and filled with water through a water pressure connector, and the pressure is made to reach a set highest value and kept for 3-4h; filler is expanded, and tetrafluorohydrazine powder is injected into a gap in S6; sintering is carried out, and furnace charging and sintering are carried out; preheating is carried out for 6h in a furnace; a tetrafluorohydrazine layer and a metal part reach the synchronous thermal change coefficient, the temperature is gradually increased, the temperature increasing process is slowlycarried out in order, finally, the temperature reaches 385 DEG C, heat preservation is carried out for 6h, then, the temperature is slowly decreased in a grading mode, and the whole sintering processspends 36h. Steel lining tetrafluorohydrazine cage hoop pipeline equipment manufactured through the equal steel compound technology is good in corrosion resistance effect, good in compound effect, free of automatic falling, and free of bulking and dented suction and expansion deformation

The invention discloses a polytetrafluoroethylene steel-liner straight pipe and a die pressing technology thereof, and belongs to the technical field of steel-liner straight pipes. The polytetrafluoroethylene steel-liner straight pipe comprises an upper cover plate, a lower cover plate, and a hollow circular tube shaped mandrel which is arranged between the upper cover plate and the lower cover plate, wherein the outer side of the mandrel is sleeved with a rubber sleeve, and short tetrafluorohydrazine pipes sleeve the outer side of the rubber sleeve; the outer sides of the tetrafluorohydrazineshort pipes are sleeved with die-pressing straight pipes; the tetrafluorohydrazine short pipes are provided with tetrafluorohydrazine rings between the upper cover plate and the lower cover plate; the die-pressing straight pipes are provided with sealing surface dies between the upper cover plate and the lower cover plate; and the sealing surface dies are correspondingly connected to the upper cover plate and the lower cover plate through fasteners. According to the polytetrafluoroethylene steel-liner straight pipe, automatization or semi-automatization is achieved, so that the working efficiency is greatly improved; the cost control is easily refined; the problems of agglomerating, bridging and hollowing can be avoided; the workload of fine processing is decreased; the powder loss is greatly decreased; the rubber sleeve is prevented from breaking; and the product forming rate is increased.

The invention relates to a novel explosion-proof oxygen supercharger. According to the technical scheme, the novel explosion-proof oxygen supercharger comprises an air chamber, an exhaust connecting pipe, an air inlet connecting pipe, an air cylinder, a transition air cylinder, a partition layer, a crankshaft connecting rod, a piston head, a crankshaft box, a base, a shaft seal, a crankshaft, a linkage rod, an oil injection hole, an exhaust valve and an air inlet valve. The top and the bottom of the transition air cylinder are each provided with a tetrafluorohydrazine seal shaft sleeve, the crankshaft connecting rod penetrates the tetrafluorohydrazine graphite seal shaft sleeves, the tetrafluorohydrazine graphite seal shaft sleeves can exert the lubricating seal effect in the crankshaft connecting rod running process, and oxygen in the air cylinder can be prevented from leaking into the transition air cylinder or leakage gas in the transition air cylinder is prevented from entering thecrankshaft box. According to the test, the oxygen leakage rate of the device can be controlled to the level below 0.5%, and the accident potentials of oxygen leakage and explosion prevention can be thoroughly avoided.

The invention discloses an installing method of a wave surface tetrafluorohydrazine plate rubber support one-way constraint prefabricated beam plate. Certain constraint force is exerted on a prefabricated beam in the installing process, and the disadvantages that due to omnibearing movement of the prefabricated beam, the installing position is uneasy to control and a slip accident easily occurs are avoided; the use of tetrafluorohydrazine plate rubber support silicone grease oil is guaranteed, longitudinal slide failure of the support is avoided, and the service life of the support is prolonged; in the later using process of a bridge, elastic constraint force is exerted on the prefabricated beam, part of impact force of a vehicle and seismic force can be buffered, and anti-impact and seismic performance of the bridge is improved. By means of the installing method of the wave surface tetrafluorohydrazine plate rubber support one-way constraint prefabricated beam plate, the installing efficiency and position accuracy of the prefabricated beam are improved, the service life of the support and the beam plate is prolonged, materials are saved, environmental pollution is reduced, the time in the installing process is greatly shortened, repeated use of a machine is reduced, and the installing method is significant in safety of the installing, constructing and operating stage of the prefabricated beam.

The invention discloses a preparation method of 2,3,5,6-tetrafluorohydrazine-1,4-benzene dimethanol, and belongs to the technical field of fine chemical synthesis. The preparation method is characterized by comprising the following reaction steps that (1) chlorine is led into paraxylene under catalyzing of a catalyst and irradiation of visible light to achieve chlorination, then nitrogen is led in to expel residual hydrogen chloride gas, and 1,4-dual(trichloromethyl)-2,3,5,6-tetrachlorobenzene is obtained; (2) the 1,4-dual(trichloromethyl)-2,3,5,6-tetrachlorobenzene and potassium fluoride are subject to fluorization and alcoholysis in an alcohol solvent, the solvent is recycled through reduced pressure distillation, washing is carried out the neutral state is obtained, drying is carried out, and 1,4-dual(silane oxygen methyl chloride)-2,3,5,6-tetrachlorobenzene is obtained; and (3) hydrogen is led into the 1,4-dual(silane oxygen methyl chloride)-2,3,5,6-tetrachlorobenzene in a solvent containing a metal catalyst and an acid-binding agent to be subject to catalytic hydrogenation reduction, an upper-layer organic phase is subject to cooling, suction filtration and drying to obtain the2,3,5,6-tetrafluorohydrazine-1,4-benzene dimethanol. The preparation method has the beneficial effects that the raw materials are low in price and easy to obtain, the synthetic route is short, operation is easy and convenient, and the product cost is low.

The invention discloses a multiple-point bearing pot type rubber support. The multiple-point bearing pot type rubber support comprises an upper support plate, a lower support base plate, a middle supporting plate, a tetrafluorohydrazine sliding plate, a stainless steel plate, a first rubber mat, a second rubber mat, a third rubber mat and a fourth rubber mat, wherein the middle supporting plate isarranged on the lower support base plate, the first rubber mat, the second rubber mat, the third rubber mat and the fourth rubber mat are arranged between the lower support plate and the middle supporting plate, the tetrafluorohydrazine sliding plate is arranged on the middle supporting plate, and the upper support plate is arranged on the tetrafluorohydrazine sliding plate; the stainless steel plate is arranged between the tetrafluorohydrazine sliding plate and the upper support plate, and the tetrafluorohydrazine sliding plate is slidably connected with the stainless steel plate which is embedded into the upper support plate. According to the multiple-point bearing pot type rubber support, four pot type cavities are formed in the lower support base plate, the rubber mats are arranged inthe four pot type cavities respectively, the middle supporting plate is provided with four supporting feet, the four supporting feet are matched with the rubber mats in the four pot type cavities, and the supporting force borne by the support is uniformly dispersed to the four rubber mats, so that the bearing capacity is higher, and the anti-seismic effect is better.

The invention provides a urine microalbumin detection reagent strip and a preparation method thereof, and belongs to the technical field of medical examination. The reagent strip comprises a supporting plate and a filter paper sheet, wherein the filter paper sheet is attached onto the supporting plate; the filter paper sheet is immerged in dyeing liquid; the dyeing liquid is prepared from a reagent I and a reagent II; the reagent I is prepared from cyanine dyes, trolamine buffer solution, Triton X-100, sodium benzoate and PEG-4000; the reagent II is prepared from disodium hydrogen phosphate-monosodium orthophosphate buffer solution, O-(N-succinimido)-N N N'N'-tetramethyl tetrafluorohydrazine carbamide borate, sodium azide and dimethyl acetamide. The cyanine dyes of the prepared urine microalbumin detection reagent strip can fast react with microalbumin in urine; when the concentration of the microalbumin is in a range of 0 to 200mg/L, the test paper is at the obvious color gradation from being achromatic color to dark blue; the visual distinguishing and machine reading are easy; the determination result is accurate; the stability is high.

The invention discloses an electric heating knife rest for butting a tetrafluorohydrazine cylinder. The electric heating knife rest comprises a side fixing frame; a lower bracket is hinged to the sidefixing frame; one side, close to the side fixing frame, of the lower end of the lower bracket is provided with a jacking device, and the other side is provided with supporting legs; the upper end face of the lower bracket is provided with a lower heating box; the two sides of the upper end of the lower heating box are each provided with an inclined side supporting plate; the upper end face of thelower bracket is provided with a fixing seat; the fixing seat is provided with a screw rod I; the screw rod I is sequentially sleeved with a nut I, a side bracket and a pressing bar from top to bottom; the lower end of the side bracket is provided with a plurality of pressing blocks II; a heating tube I is arranged inside the lower heating box; a lower heating plate is arranged at the upper end of the lower heating box; an upper bracket is arranged above the lower bracket; the lower end of the upper bracket is provided with a plurality of pressing blocks I; an upper heating box is arranged atthe lower ends of the pressing blocks I; a heating tube II is arranged inside the upper heating box; and the lower end of the upper heating box is provided with an upper heating plate. The contact area of a joint of the tetrafluorohydrazine cylinder butted by using the electric heating knife rest disclosed by the invention is large, the firmness is higher, a pressed surface is uniform in thickness and high in quality, and the molded tetrafluorohydrazine cylinder is higher in durability.

The invention relates to a flanging device for a tetrafluorohydrazine pipe. The flanging device comprises a supporting bracket and a flanging positioning device. The supporting bracket comprises a base, the base is provided with a slide rail, centering mechanisms are symmetrically and radially arranged on the front and rear portions of the slide rail, one or more jacking mechanisms are arranged between the two centering mechanisms, and the front end of the slide rail is provided with a positioning mechanism. The flanging positioning device comprises a mounting base, the left and right sides ofthe front end of the mounting base are provided with a conical heating flanging mechanism and a stock mold respectively, the rear end of the mounting base is connected with a motor, and the motor isslidingly arranged on a slide base through a support and pushed by an air cylinder to move frontwards and backwards. The flanging device for the tetrafluorohydrazine pipe can improve the work efficiency.

The invention discloses a steel lining polytetrafluoroethylene tee joint and a mold pressing process thereof, and belongs to the technical field of steel lining tee joints. The steel lining polytetrafluoroethylene tee joint comprises a tee joint steel part, a main pipe and a branch pipe, wherein the main pipe and the branch pipe are arranged in the tee joint steel part and are communicated. The main pipe comprises a hollow round-pipe-shaped main pipe core rod and two main pipe glands. A tee joint rubber sleeve is arranged on the outer side of the main pipe core rod. A main pipe tetrafluorohydrazine short pipe is arranged on the outer side of the tee joint rubber sleeve in a sleeving manner. The branch pipe comprises a hollow round-pipe-shaped branch pipe core rod and two branch pipe glands. The outer side of the branch pipe core rod is sleeved with a tee joint rubber sleeve, and a branch pipe tetrafluorohydrazine short pipe is arranged on the outer side of the tee joint rubber sleeve in a sleeving manner. A semi-circular gap main pipe tetrafluorohydrazine short pipe and a branch pipe arc opening short pipe connected with the semi-circular gap main pipe tetrafluorohydrazine short pipe are arranged at the joint of the main pipe tetrafluorohydrazine short pipe and the branch pipe tetrafluorohydrazine short pipe. According to the steel lining polytetrafluoroethylene tee joint, automation or semi-automation can be achieved, the work efficiency is greatly improved, cost control can be refined easily, powder bridging and empty drum scrapping are avoided, the finish machining amount is reduced, powder consumption is reduced, and the product forming ratio is increased.

The invention discloses a chlorine-resistant modified graphite sealing material for valves. The chlorine-resistant modified graphite sealing material for the valves comprises, by weight, 50-60% of tetrafluorohydrazine, 30-40% of graphite, 1-2% of chromium powder, 1-2% of molybdenum powder, 0.5-1.5% of aluminum powder, 0.5-1.5% of tantalum powder, 0.5-1.5% of nickel powder and 2.5-3.5% of copper powder. The chlorine-resistant modified graphite sealing material for the valves has the advantages that made of the graphite and the tetrafluorohydrazine, the valves are effectively improved in chlorine resistance, excellent in sealing performance, higher in strength, long in service life and have less maintenance cost.

The invention relates to a method for preparing Yb and Tm doped sodium yttrium tetrafluorohydrazine and belongs to the technical field of fluorescent nano material preparation. A hydrothermal method is adopted for preparation. The method is basically characterized by comprising the following steps: taking deionized water and N-methyl pyrrolidone as solvents, and ytterbium chloride hexahydrate, thulium chloride hexahydrate and yttrium chloride hexahydrate as raw materials, mixing and stirring, adding sodium fluoride, putting the mixed liquid into a reaction kettle, carrying out thermal treatment for 12 hours at 140-180 DEG C, naturally cooling to the room temperature, centrifuging, collecting a sample, and washing with deionized water and absolute ethyl alcohol three times to obtain a hexagonal and cubic mixed phase or pure hexagonal phase-phase sodium yttrium tetrafluorohydrazine upconversion fluorescence material. Under excitation of laser of 980nm, the material has a very good fluorescence property, and has a main emission peak at 362nm, 451nm and 475nm. The method is simple to operate and good in energy conservation, greenness and environment protection, and the prepared productis high in fluorescence strength, wide in application range and easy to popularize and produce.

The present application discloses a tetrafluorohydrazine lining reaction kettle comprising a reaction kettle body, a first tetrafluorohydrazine lining, a second tetrafluorohydrazine lining and a flowblocking assembly. The first tetrafluorohydrazine lining is disposed on the inner wall of the reaction kettle body, the flow blocking assembly is fixed on the inner wall of the reaction kettle body, and the second tetrafluorohydrazine lining is arranged on the flow blocking assembly. By arranging the flow blocking assembly in the reaction kettle body and arranging the second tetrafluorohydrazine lining on the flow blocking assembly, during the stirring, materials continuously collide with the flow blocking assembly, the materials are dispersed evenly, and thus full reaction is performed; the materials in the reaction kettle body are prevented from forming a vortex, a turbulent flow in the reaction kettle body is added, thereby improving overall stability of the reaction kettle body, also improving stirring efficiency and production efficiency, and also reducing the abrasion of the first tetrafluorohydrazine lining in the reaction kettle body after the materials form the vortex.

The invention discloses a double-end-face cartridge mechanical seal without a bushing and a bearing. A front static ring, a front gland and a rear gland are arranged on the outer side of a pump body and sequentially connected, the front static ring, the front gland, the rear gland and the pump body are closed to form a cavity, and a pump shaft is connected with a tetrafluorohydrazine corrugated pipe in the cavity; and the surface of the front static ring and the surface of a front movable ring formed by embedding silicon carbide into the tetrafluorohydrazine corrugated pipe are matched to form a first grinding face, a half sub half ring is clamped to the rear end of the tetrafluorohydrazine corrugated pipe, a limiting wearproof piece is arranged at the rear end of the half sub half ring, a cylindrical pin is arranged between the limiting wearproof piece and the half sub half ring and is in transmission fit with a cold movable ring at the rear end, and the cold movable ring, a cold static ring, a push ring and a second elastic compensation element are sequentially connected with the rear end of the limiting wearproof piece. The surface of the cold movable ring and the surface of the cold static ring are matched to form a second grinding face. The cartridge mechanical seal has the beneficial effects of being capable of saving energy, environmentally-friendly, good in cooling effect, efficient in seal, light and handy in size, wide in application range and low in manufacturing cost and solves the problems that mechanical seal fails due to dry grinding caused by unsmooth supply, blockage, local vacuum and the like of a medium in the equipment operation process.