21 results about "Phosphorane" patented technology

The invention relates to a passivation contact structure and a preparation method and application thereof. The preparation method of the passivation contact structure comprises the following steps: preparing a tunneling oxide layer on any surface of a silicon wafer; hydrogen, phosphorane, silane and ammonia gas are introduced, and primary deposition is carried out on the surface of the tunneling oxide layer; after the primary deposition is finished, hydrogen, phosphorane, silane and ammonia gas are continuously introduced for secondary deposition, so that a doped polycrystalline silicon nitride layer is formed on the surface of the tunneling oxide layer; a passivation contact structure is formed on the surface of the silicon wafer through annealing treatment; the flow ratio of hydrogen to phosphine in the primary deposition is greater than that of hydrogen to phosphine in the secondary deposition, and the difference value is 1.4-3.1; the temperature of the primary deposition is greater than or equal to the temperature of the secondary deposition, and the difference value is less than 10 DEG C. The passivation contact structure prepared by the preparation method is beneficial to reducing optical parasitic absorption loss and improving the photoelectric conversion efficiency of a photovoltaic cell.

The invention discloses a synthesis and purification method of electronic grade phosphorane, which relates to the technical field of phosphorane synthesis, and has the advantages that impurities such as metal oxides and carbides in a silicon carbide ceramic substrate are removed by selecting the silicon carbide ceramic substrate and performing high-temperature annealing treatment, so that the atomic arrangement of the substrate is more regular and ordered; compared with the prior art, the method has the advantages that the gallium phosphide crystal structure is more complete, so that the gallium phosphide crystal structure has higher structural stability, meanwhile, after impurities are removed, the interaction between the substrate and reactants in a high-temperature reaction environment is more controllable, the chemical stability is enhanced, a firm and reliable base is provided for growth of gallium phosphide crystals, and by adopting the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, the yield of the gallium phosphide crystal is increased. The production of waste gas is reduced by utilizing the extremely low volatility of the gallium phosphide, and meanwhile, the reaction rate between hydrogen phosphide and hydrogen is accelerated by introducing glucose oxidase for catalytic reaction, so that the gallium phosphide crystal is promoted to efficiently and directionally grow on the silicon carbide ceramic substrate, and the product quality and the production efficiency are improved.

The invention relates to the technical field of gas configuration, in particular to a phosphorane and hydrogen mixed gas configuration device and method.The method comprises the steps that whether a configuration system is tightly connected or not is detected, and configuration preparation work is conducted; the method comprises the steps that phosphorane is introduced into a target tank, hydrogen is introduced into an intermediate tank, a controller monitors the reading change of an electronic balance module and the reading of a pressure gauge module in real time, and introduction is stopped after the phosphorane and the hydrogen are introduced into a preset component mass; according to the method, when phosphorane and hydrogen are introduced into the target tank, the display of the pressure gauge module is continuously concerned through the controller, the display of the pressure gauge module is continuously concerned through the controller, so that the leakage of the corresponding gas conveying pipeline is judged, an alarm is given, sudden stop operation is carried out, or hydrogen in the intermediate tank is introduced into the target tank to be mixed, and mixed gas is obtained. And when the reading of the pressure gauge module is abnormal, the gas conveying pipeline is closed, the gas introduction is stopped, and an alarm is given, so that workers can be informed of evacuating from a workshop at the first time when the gas leaks, and the safety of the workers is guaranteed.

The invention discloses a graphene-containing carrier material, a negative pressure container containing the same and used for storing electronic gas, and a use method and a preparation method of the graphene-containing carrier material. The negative pressure container comprises a bottle body, a valve and a carrier material filled in the bottle body, and the carrier material comprises graphene. By utilizing the characteristics that the selected carrier material has a relatively high specific surface area and a relatively large pore volume, the whole negative pressure container is filled with the carrier material so as to load and unload electronic gases including arsine, phosphorane, boron trifluoride and the like, and excellent loading capacity and unloading capacity are shown; the product type of the negative pressure container capable of containing the electronic gas is expanded, and the benign development of the negative pressure container market is guaranteed.

The invention discloses a safe and energy-saving type low-temperature storage device and method for phosphorane, and belongs to the field of phosphorane storage. The safe and energy-saving type low-temperature storage device comprises a fixed base, a plurality of placing cavities are connected in the fixed base, a plurality of steel cylinders for loading the phosphorane are arranged in the placing cavities, and a pushing mechanism for pushing the steel cylinders is connected in the placing cavities; according to the device, steel cylinders loaded with phosphorane are orderly arranged between the two pushing plates on the belt, the U-shaped frame is manually pulled to push out the steel cylinders between the two arc-shaped blocks for use, the belt can be driven by the driving motor to assist the steel cylinders in the containing cavity to move towards the containing platform in order, workers can conveniently take the phosphorane steel cylinders in order for use, the labor intensity of workers is reduced, and the working efficiency is improved. And the working personnel can clearly know the use condition of the phosphorane steel cylinder while reducing the workload.

The invention discloses a preparation method of an adsorbent for producing high-purity silane and the adsorbent. The method comprises the following steps: step 1, carrying out oxidation treatment on activated carbon; 2, uniformly mixing the sample obtained in the step 1 with a copper salt precursor; 3, calcining the sample obtained in the step 2 in an inert atmosphere to obtain a CuO / AC inner core; step 4, dispersing the CuO / AC inner core into the sodium aluminosilicate sol, and then adding a template agent to carry out hydrothermal reaction, so that sodium aluminosilicate is crystallized to obtain an adsorbent precursor; and step 5, roasting the adsorbent precursor to obtain the adsorbent. The adsorbent is provided with a CuO / AC inner core and a molecular sieve shell, when impurities are adsorbed, the molecular sieve shell preliminarily adsorbs borane and phosphorane in silane, and deep purification is achieved through Cu ions in the CuO / AC inner core; meanwhile, the high conductivity of the activated carbon promotes electron transfer, and the reaction between Cu ions and phosphorane / borane is accelerated.

The utility model discloses an automatic gas distribution device containing phosphorane and silane, which relates to the technical field of automatic gas distribution and comprises a PLC (programmable logic controller) self-control touch screen control cabinet, a high-cleanliness automatic gas distribution valve group, a fully-sealed stainless steel vertical cabinet, a mixed gas carrying bottle, an all-steel high-precision weighing platform and an automatic control system. The PLC self-control touch screen control cabinet is provided with a high-definition touch display screen, a mechanical control button and a buzzing alarm device, one-button automatic gas distribution is really realized through the PLC self-control touch screen control cabinet according to the set proportion formula, and after the one-button automatic gas distribution is completed, the one-button automatic gas distribution is automatically stopped and a signal is sent out; the equipment has the functions of automatic control, data monitoring, alarm, recording, storage and statistics, and is in butt joint with carried upper computer control software to facilitate background management of managers; the circuit connection in the equipment is explosion-proof, safe and reliable; the equipment adopts an integrated design and is matched with a negative-pressure air inducing system, so that the safety, reliability, attractiveness and durability are really realized.

The present invention provides methods of generating diverse chemical structures on DNA through Wittig olefination of novel on-DNA phosphorane ylides and Homer-Wadsworth-Emmons reaction of on-DNA β-keto phosphonates. The methods of this invention provide access to DNA-encode libraries (DELs) of diverse peptides, peptidomimetics, chalcone-based molecules, and the like.

The invention discloses a synthesis and purification device and a synthesis and purification method for electronic grade phosphorane, and relates to the technical field of phosphorane synthesis, the synthesis and purification device comprises a reaction kettle and a liquid nitrogen tank, the top of the reaction kettle is provided with an input pipeline, and the side face of the reaction kettle is connected with a condenser by arranging a pipeline. The synthesis and purification method of the electronic grade phosphorane comprises the following steps: injecting a raw material into a reaction kettle through an input pipeline, carrying out corresponding synthesis operation, starting a servo motor, driving a power sleeve to rotate clockwise, and matching with a hydraulic bin I, a turntable, a torsion spring, an extrusion block, a stress rod I, a half gear ring, a rotating rod I, a rotating rod II, a gear, a bevel gear I and a bevel gear II to synthesize the electronic grade phosphorane. The stirring plate rotates in the horizontal direction, and the mixing plate rotates in the vertical direction, so that the stirring effect of the device is improved, and the synthesis and purification efficiency of the device is improved.

The invention discloses a nano-ceramic coating for renovating a galvanized guardrail steel plate coating and a preparation method of the nano-ceramic coating, and belongs to the technical field of coatings. The nano ceramic coating for renovating the galvanized guardrail steel plate coating comprises the following raw material components in parts by mass: 20-30 parts of an epoxy resin base material, 4-6 parts of an epoxy diluent, 30-45 parts of a titanium-containing filler, 0.5-1 part of a dispersing agent, 0.5-1 part of a defoaming agent, 0.5-1 part of an accelerant, 5-10 parts of a solvent, 8-10 parts of an amine curing agent and 1-3 parts of carbon disulfide. The titanium-containing filler is obtained by carrying out in-situ hydrolysis on titanium tetrachloride on the surface of hexagonal boron nitride; the amine curing agent comprises 4, 5-dimethyl-1, 2-phenylenediamine, a phosphamide curing agent, modified polyamide and modified fatty amine; the accelerant comprises any one or more of bis (triphenylphosphine) ammonium chloride, phenol, salicylic acid and tri-(dimethylaminomethyl) phenol; the solvent is any one or more of methyl ethyl ketone, xylene, butanol, methyl isobutyl ketone and methylbenzene.

The application belongs to the field of organic phosphorus chemistry and phosphorus chemical industry, and particularly relates to a preparation method of phosphine. The method comprises the following steps: adding P4, Bu3SnH, a free radical initiator and an organic solvent into a test tube with a plug, sealing the test tube, wrapping the test tube with aluminum foil to avoid light, and stirring the test tube for a period of time; and then adding an acid into the reaction mixture to obtain phosphine. The application has mild reaction conditions, good safety and is suitable for industrial production.

The invention discloses a preparation method of a phosphorane room-temperature gas-sensitive material, which comprises the following steps: respectively adding Bi (NO3) 3.5 H2O and Na2MoO4. 2H2O into ethylene glycol, stirring until the Bi (NO3) 3.5 H2O and the Na2MoO4. 2H2O are completely dissolved, mixing the two solutions, and adding isopropanol to prepare a mixed solution; and transferring the obtained mixed solution into a high-pressure reaction kettle, carrying out solvothermal reaction at 160 DEG C for 15 hours, naturally cooling to room temperature after the reaction is finished, centrifuging, washing and freeze-drying to obtain the gas-sensitive material. The gas-sensitive material prepared by the method has good morphology and structure, and the successful preparation of the special litchi-shaped structure improves the electronic characteristics of the material and effectively enhances the gas-sensitive performance of the material.

The utility model relates to the technical field of trace phosphine analysis, in particular to a trace phosphine detection device for a disilane synthesis and purification process, which comprises a six-way valve, a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface are annularly and sequentially arranged on the six-way valve at equal intervals, the second interface is a carrier gas inlet, and the third interface is a carrier gas outlet. The fifth interface is a sample inlet, and the sixth interface is an emptying hole; the two ends of the first air pipe are communicated with the first connector and the fourth connector respectively, and a quantitative pipe is arranged on the first air pipe; one end of the second gas pipe is communicated with the third interface, the second organ is provided with a chromatographic column and a DID helium ionization detector, and the chromatographic column is arranged between the third interface and the DID helium ionization detector. When trace phosphorane is analyzed, impurity concentration changes can be rapidly detected, a balanced (stable state) analysis value can be rapidly measured, and the method has the advantages of being accurate in quantification, low in detection limit and short in analysis period.

The utility model provides a device for producing ultrapure phosphorane through differential pressure thermal coupling rectification. A first condensation reflux device is arranged at the top of a first rectifying tower, and a first reboiler is arranged at the bottom of the first rectifying tower; a second condensation reflux device is arranged at the top of the second rectifying tower, and a second reboiler is arranged at the bottom; the top of the first rectifying tower is sequentially connected with a second reboiler, a first condensation reflux device and a second rectifying tower through a conveying pipeline; a third condensation reflux device is arranged at the top of the third rectifying tower, and a third reboiler is arranged at the bottom; the bottom of the second rectifying tower is connected with the third rectifying tower. A diaphragm compressor is arranged at the top of the third rectifying tower, the pressure of a product is increased, normal-temperature filling can be guaranteed, and meanwhile, an outlet of the diaphragm compressor is connected with a first reboiler B, so that heat of a gas phase at the top of the third rectifying tower is fully utilized. The system and the device can effectively remove impurities such as H2O, O2, H2, C2H6, CH4, CO, SiH4, C2H4 and AsH3 in industrial hydrogen phosphide to obtain electronic-grade hydrogen phosphide; meanwhile, the energy consumption in the operation process is reduced, and the annual operation cost is reduced.

The invention provides a method for preparing phosphorane by pyrolyzing sodium hypophosphite based on raw material pretreatment, the pretreatment method comprises the following steps: carrying out mechanical activation and dry granulation on sodium hypophosphite, and firstly, carrying out intermittent ball milling treatment on sodium hypophosphite powder in an inert atmosphere to form primary activated sodium hypophosphite; and then granulating by the steps of tabletting, crushing, screening and the like to obtain the granular sodium hypophosphite with the particle size of 0.8-1.2 mm, the porosity of 20-35% and the bulk density of 0.75-0.95 g / cm < 3 >. According to the pyrolysis method, on the basis of pretreatment, staged heating is carried out, a pyrolysis reaction is carried out under inert gas protection, the product phosphine is subjected to multi-stage condensation and low-temperature rectification purification, and then high-purity phosphine gas is obtained, the pyrolysis starting temperature can be remarkably reduced, the phosphine release rate and yield are increased, side reactions and impurity entrainment are reduced, and the method is suitable for industrial production. The method has the advantages of high raw material utilization rate, centralized and controllable pyrolysis reaction, high product purity and the like, and is suitable for efficient and safe preparation of phosphorane.

The invention belongs to the field of organic phosphorus chemistry and phosphorus chemical industry, and particularly relates to a preparation method of phosphorane. Comprising the following steps: adding P4, Bu3SnH, a free radical initiator and an organic solvent into a test tube with a plug, sealing the test tube, wrapping the test tube with an aluminum foil to keep away from light, and stirring to react for a period of time; and adding acid into the reaction mixture to obtain phosphorane. The method is mild in reaction condition, good in safety and suitable for industrial production.

The invention relates to the technical field of mixing, and discloses a grain fumigation device based on phosphorane mixed nitrogen, comprising: a moving trolley on which a bracket is fixed; the mixing box is arranged on the inner side of the support, and a control box is arranged on the front surface of the mixing box; wherein the inner side of the mixing box comprises a three-way valve A, a metering assembly, a static mixer A, a three-way valve B, a first flow dividing pipe, a second flow dividing pipe and a second mixing assembly, and the metering assembly is arranged at the output end of the three-way valve A; through the arrangement of the three-way valve A, the static mixer A, the three-way valve B, the first flow dividing pipe, the second flow dividing pipe and the second mixing assembly, the device can complete metering only through one flow meter, later overhaul and maintenance are easy, the machining cost is reduced, secondary mixing is adopted, and the working efficiency is improved. The problems of inaccurate mixing concentration and poor mixing uniformity caused by primary mixing can be greatly avoided, and the practicability of the device is improved.

The invention discloses a method for synthesizing an olefin-functionalized polyester-polyether copolymer. The method comprises the following steps: mixing an organic chromium complex, bis(triphenylphosphorane)ammonium chloride, 3-ethylene-6-vinyltetrahydro-2H-pyran-2-one, and an epoxy compound monomer for reaction to prepare the olefin-functionalized polyester-polyether copolymer; the structural formula of the organic chromium complex is shown in the following formula I: #imgabs0# The 3-ethylene-6-vinyltetrahydro-2H-pyran-2-one used in the invention is prepared by carbon dioxide and butadiene, and the olefin-functionalized polyester-polyether copolymer is prepared by using 3-ethylene-6-vinyltetrahydro-2H-pyran-2-one and the epoxy compound monomer. The prepared olefin-functionalized polyester-polyether copolymer has a specific number average molecular weight and its distribution, and carbon dioxide is distributed in the polymer. The invention effectively fixes carbon dioxide, thereby achieving green and sustainable development.

The invention provides a method for producing ultrapure phosphine through differential pressure thermal coupling rectification, which comprises the following steps: industrial phosphine is fed from the middle of a first rectifying tower for purification, a tower top gas phase is condensed by a second reboiler and a first condensation reflux device, one part of the gas phase flows back into the first rectifying tower, and the other part of the gas phase enters a second rectifying tower; condensing and totally refluxing the tower top gas phase purified by the second rectifying tower into the second rectifying tower through a third reboiler and a second condensation reflux device, and extracting from the tower bottom of the second rectifying tower and conveying to a third rectifying tower; and after purification in the third rectifying tower, condensing and refluxing one part of a tower top gas phase into the third rectifying tower through a third condensing and refluxing device, and extracting the other part of the tower top gas phase as an electronic-grade hydrogen phosphide product. A diaphragm compressor is arranged at the top of the third rectifying tower, the product pressure is increased, normal-temperature filling can be guaranteed, and by means of the system and method, impurities such as H2O, O2, H2, C2H6, CH4, CO, SiH4, C2H4 and AsH3 in industrial phosphine can be effectively removed, and the electronic-grade phosphine is obtained.

The application discloses a kind of nano porcelain coating for galvanized guardrail steel plate coating renovation and a preparation method thereof, and belongs to the technical field of coating.The nano porcelain coating for galvanized guardrail steel plate coating renovation of the application comprises, by mass fraction, 20-30 mass parts of epoxy resin base material, 4-6 mass parts of epoxy diluent, 30-45 mass parts of titanium-containing filler, 0.5-1 mass part of dispersant, 0.5-1 mass part of defoaming agent, 0.5-1 mass part of accelerator, 5-10 mass parts of solvent, 8-10 mass parts of amine curing agent and 1-3 mass parts of carbon disulfide.The titanium-containing filler is obtained by in-situ hydrolysis of titanium tetrachloride on the surface of hexagonal boron nitride.The amine curing agent comprises 4,5-dimethyl-1,2-phenylenediamine, phosphoramide curing agent, modified polyamide and modified aliphatic amine.The accelerator comprises any one or several of bis(triphenylphosphine)ammonium chloride, phenol, salicylic acid and tris(dimethylaminomethyl)phenol.The solvent is any one or several of methyl ethyl ketone, dimethylbenzene, butanol, methyl isobutyl ketone and toluene.

The utility model discloses a device for treating tail gas containing phosphorane and silane, which relates to the technical field of tail gas treatment and comprises a PLC (programmable logic controller) self-control touch screen control cabinet, a full-sealed anti-corrosion spraying reaction box, a centrifugal fan, a medicament circulating liquid adding pump, a reactant filter, various detection instruments and control valves. The PLC self-control touch screen control cabinet starts the centrifugal fan and the chemical circulation liquid adding pump to start processing, and after processing is completed, the device automatically stops and sends out a signal; the equipment has the functions of data monitoring, alarming, recording, storage and statistics, and is in butt joint with carried upper computer control software to facilitate background management of managers; the circuit connection in the equipment is explosion-proof, safe and reliable; the equipment adopts a skid-mounted integrated design, is convenient to carry, safe, attractive and durable, and adapts to severe environments.