52results about How to "Single composition" patented technology

The invention relates to a phosphine oxide-modified pillar (5) arene derivative and an application thereof, belonging to the technical field of selective separation and extraction agents for thorium (IV) and uranium (VI) from rare earth elements. The phosphine oxide-modified pillar (5) arene derivative is diphenyl phosphine oxide-substituted pillar (5) arene, is used as an extraction agent for selectively separating thorium and uranium from rare earth elements, and can realize the selective separation of uranium to thorium in actinide elements to a certain extent. The extraction agent, namely the phosphine oxide-modified pillar (5) arene in the invention has the advantages of single composition, good chemical stability, simple synthesis and easiness in obtainment, and is suitable for industrial production; furthermore, the using quantity of the extraction agent is low, and the thorium and the uranium can be selectively separated from the rare earth elements under high acidity; and in addition, the extraction agent further has the advantages of high extraction speed, high phase splitting speed and the like. The product disclosed by the invention has great economic benefits and practical application prospects.

The invention relates to a synthesis method and an application method of a photocatalyst Bi4O5Br2 and belongs to the technical field of environmental chemical photocatalytic water treatment. The synthesis method of the photocatalyst Bi4O5Br2 is characterized in that Bi(NO3)3.5H2O and KBr are taken as raw materials, or BiBr3 is taken as a raw material directly, in an ethanediol or propanediol solvent, stronger ammonia water is utilized as a pH regulator, and a simple, economic and environment-friendly alcoholysis method is utilized for preparing novel Bi4O5Br2 photocatalyst powder with a narrow band gap, strong visible-light response capability and single composition at room temperature. The synthesis method of the photocatalyst Bi4O5Br2 can be realized at low temperature, has no high temperature or high pressure requirement and is simple, feasible, economic and environmentally friendly, and the prepared photocatalyst is single and pure in variety, narrow in band gap, shows good response capability and photocatalytic degradation capacity in visible lights and has great significance in environmental management and environment-friendly energy utilization.

The invention discloses a method for efficiently and deeply recovering hydrogen / deuterium in hydrogen / lithium deuteride. The method comprises the following steps: 1) preparation of a reaction system; 2) leak rate inspection of a reaction device; 3) pretreatment of reactants ; 4) material mixing; 5) hydrogen release by heating; 6) post-reaction treatment. Wherein step 5) the activator that heating reaction step adopts is porous oxide, is selected from the one in mesoporous silica SBA-15, microporous silica / alumina MCM-41, MCM-22, mesoporous titanium dioxide Or several. The method of the invention has the advantages of simple operation, low cost, can be used in large-scale experiments, low reaction temperature, high recovery efficiency of hydrogen isotope, small residual amount of hydrogen in the product, single composition of the product, environmental friendliness, and convenient treatment.

The invention discloses a conductive polymer porous membrane. The conductive polymer porous membrane has a surface specific resistance of more than 160 omega.m. The conductive polymer porous membrane is prepared by the following method comprising the steps: carrying out ultrasonic dispersion on carbon black for 1-3 hours in water at 25 DEG C, wherein the ultrasonic wave power is 0-300 w; then stirring, adding a binding agent into the mixture, and fully stirring to obtain a uniform dynamic membrane casting solution; washing a polymer basement membrane with water; continuously running under the operation pressure of 0.1-0.3 MPa and at the temperature of 25-90 DEG C by using a depositional mode with the uniform dynamic membrane casting solution obtained in the step (1) as a solution to be filtered and the polymer basement membrane obtained in step (1) as a filter material to obtain a dynamic composite membrane; and naturally drying to obtain the conductive polymer porous membrane. The preparation method is simple in process, has no environmental pollution and no special requirement on equipment, is low in cost and achieves convenience for industrial application.

The invention relates to the field of environment-friendly organic synthesis, and aims to provide a preparation method and application of a catalyst for synthesizing dimethyl carbonate. The method comprises the following steps of: dissolving polycyano cobalt metal salt in de-ionized water, adding alcohol or water-soluble polymer and stirring until the materials are fully dissolved; dropwise adding zinc halide aqueous solution into the mixed solution, stirring, filtering and separating to obtain solid; dispersing the solid in water again; adding ammonia water or aqueous solution of alkali metal hydroxide, stirring to react, filtering and repeatedly washing to obtain solid filter cake; drying under vacuum; ball-milling; rebaking; and cooling to room temperature under a nitrogen condition to prepare a product. The catalyst provided by the invention has the advantages of simplicity in preparation, single composition, no need of extra addition of a large amount of carrier or auxiliary agent, less using amount of the catalyst in reaction, mild reaction conditions, high catalytic activity and selectivity of reaching 100 percent, suitability for industrial production, yield of the dimethyl carbonate of reaching over 50 percent, superior thermal stability and capability of being recycled.

The present invention provides a method for directing block copolymers to form nanostructures, comprising: forming a homopolymer brush / felt on a substrate; coating the block copolymer on the homopolymer brush / felt; inducing block copolymer Phase separation and self-assembly form a copolymer layer with a nanostructure; one phase in the copolymer layer with a nanostructure is removed, and the unremoved phase serves as a mask to transfer the nanostructure to the substrate. The present invention uses a homopolymer brush / felt to guide the block copolymer to form a nanostructure. Since the homopolymer brush / felt of the present invention has a single, uniform, clear composition and no difference in reactivity rate, it is used to guide the formation of the block copolymer. In the nanostructure, the wetting properties of the substrate and the block copolymer can be regulated, so that domains perpendicular to or parallel to the substrate can be obtained. The defect rate of guiding the block copolymer to form a nanostructure is low. The method of the present invention also has universal applicability, and suitable homopolymer brushes / felts can be selected according to different block copolymers, and the applicability is better.

The invention belongs to the technical field of oil exploitation and relates to an alkali-free oil displacement agent containing a double long-chain s-triazine type ampholytic surfactant. The surfactant is N-methyl-N-(4,6-di-aliphatic amino-1,3,5-s-triazine-2-yl)-2-aminoethanesulfonic acid sodium salt; and the surfactant and aqueous solution are mixed evenly at the room temperature to fully dissolve the surfactant and obtain the oil displacement agent; and the surfactant can be used alone or be combined with the homologue. The oil displacement system can both reach the 10<-3>mN / m order of ultralow interfacial tension at 45 DEG C and 70 DEG C under the alkali-free condition and has the good capability of reducing the crude oi-formation water interfacial tension, thus the damage of the alkali in the alkali-containing system on formation can be avoided and the sustainable development of oil exploitation is easy to realize. The oil displacement system is suitable for different reservoirs and has higher adaptability; and the oil displacement agent has simple composition and can be used to overcome the reduction of the oil displacement efficiency to a certain extent, caused by the chromatographic separation effect.

The invention belongs to the field of surfactants and particularly relates to a highly-inhibitive foaming agent for foam drilling of shale formation and a preparation method of the foaming agent. The foaming agent which is a surfactant is structurally characterized in that a quaternary ammonium salt and polyoxyalkyl ether structure in strong electric charge interaction with shale is introduced while an appropriate hydrophobic carbon chain length is kept. The preparation method includes that alkyl polyoxyalkyl ether dimethyl tertiary amine and methane chloride are subjected to quaternary amination to obtain a surfactant sample. When the foaming agent is applied to the shale formation, remarkable inhibition performance and salt tolerance are provided wile great foaming performance is guaranteed.

The invention discloses a multilayer aerobic fermentation system and a fermentation method thereof, and belongs to the technical field of aerobic composting. The technical scheme is characterized in that the multilayer aerobic fermentation system comprises a fermentation tank, wherein sludge layers and bamboo charcoal layers are alternately arranged inside the fermentation tank from top to bottom, the bottom layer is the bamboo charcoal layer, the bamboo charcoal layer is formed by horizontally arranging a plurality of semi-cylindrical bamboo charcoal with a downwardly opening in a single layer manner, and the upper portion and the lower portion of the fermentation tank are respectively provided with a gas inlet and a gas outlet. The invention further specifically discloses the fermentation method of the multilayer aerobic fermentation system. According to the present invention, the used separation material bamboo charcoal can reduce the ammonia volatilization and reduce the total nitrogen loss, and has the porous structure compared to the traditional conditioner wood chips so as to effectively adsorb the odor generated during the fermentation process, the composition of the fermentation substrate is simple, the condition that the substrate contains a large number of the difficultly-degraded materials due to the addition of wood chips and other conditioners is avoided, and the fermentation efficiency is improved.