6 results about "Phosphorane" patented technology

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 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 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 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.