45results about How to "Short modification time" patented technology

The invention discloses a method for catalytically oxidizing NO by a dielectric barrier discharge plasma modified catalyst. The method comprises the steps of filling a catalyst into a dielectric barrier discharge plasma reactor to be modified; and placing the modified catalyst into a glass pipe type fixed bed reactor and introducing mixed gas to catalytically oxidize the NO into NO2. The modified catalyst has higher low-temperature catalytic activity and the NO catalytic oxidization efficiency can reach 75-85% at maximum; the cylindrical dielectric barrier discharge plasma reactor is adopted so as to be convenient for observing modification conditions of the catalyst; the actual operation is simple and the modification condition is easy to control; the energy consumption is lower; the modification time is shorter; the product NO2 can be absorbed by an alkali solution to obtain a byproduct and can be recycled; and the method is convenient for actual production and application and has a higher industrial application value.

The invention relates to a modification method for promoting the rapid formation of a γ-FeOOH layer on the surface of iron filings by iron ions, comprising the following steps: (1) selecting scrap iron filings of low carbon steel, medium carbon steel and low alloy structural steel, and carrying out pretreatment; (2) placing the iron filings obtained in step (1) in a mixed modification liquid containing an oxidant and a promoter for modification, and the modification liquid includes the following composition by mass percentage: 0.05% to 0.45% of the oxidant , accelerator 0.025~0.5%, polyvinyl butyral resin 0~2g / L, polyethylene glycol 0~1g / L, the balance is water, the pH of the modification solution is 2~4, and the temperature is 15-40℃ (3) After the modification in step (2) is completed, continue to add oxidant to the modification system to keep its mass concentration at 0.05% to 0.45%, and continue to modify for 20 to 60 min; (4) after the modification is completed, from The product is taken out from the above modification solution, air-dried naturally, and then the residual resin on the surface is cleaned. Compared with the prior art, the method of the invention can shorten the growth time of the γ-FeOOH layer, improve the modification efficiency, and the obtained product has stable catalytic performance and surface components.

The invention discloses a method of modifying hollow glass microbeads with an ionic liquid and a flame-retarding thermoplastic polyurethane elastomer with the modified hollow glass microbeads as a flame retardant. The method includes the steps of: 1) treating the hollow glass microbeads with a hydrochloric acid solution; 2) after the acid treatment, repeatedly washing and drying the hollow glass microbeads; 3) activating the hollow glass microbeads, adding a silane coupling agent, and performing mechanical stirring reflux; 4) stopping the reaction and cooling the reaction product to room temperature, and performing suction filtration with acetonitrile, ethanol and deionized water and drying the reaction product; 5) adding the ionic liquid to the silanized hollow glass microbeads and performing mechanical stirring reflux; 6) stopping the reaction and cooling the reaction product to room temperature, performing suction filtration successively with ethanol, a mixed solution of ethanol and deionized water, and ethanol, and drying the reaction product. By means of the hollow glass microbeads modified with the ionic liquid as the flame retardant for preparing flame-retarding thermoplastic polyurethane (TPU) elastomer, not only is oxygen index of the composite material improved, but also the vertical combustion performance, which reflects melt-dripping resistance, is improved, so that heat release rate is reduced and smoke is significantly inhibited.

The invention discloses an anti-caking agent for agricultural compound fertilizers. The anti-caking agent comprises the following raw materials in parts by weight: 80-96 parts of biomass ash, 2-10 parts of a modifier, and 2-10 parts of a crystal phase control agent, wherein the modifier is at least one of hydrogenated tallow amine, sodium aliphatate, phosphate and paraffin, and the crystal phase control agent is at least one of sodium dodecylbenzene sulfonate and lauryl sodium sulfate. In the process of preparation, the biomass ash and the modifier are added into a screw extruder in required proportion to carry out modification so as to form a modified material, and then, the modified material and the crystal phase control agent are simultaneously poured into a cooling cylinder; in the process of cooling the modified material, the modified material and the crystal phase control agent are uniformly mixed. According to the invention, the anti-caking effect of the anti-caking agent is improved, and the production cost is reduced.

The invention relates to the field of asphalt waterproof coiled material, and discloses a modified asphalt waterproof coiled material compound, a modified asphalt waterproof coiled material compound and its preparation method and application. The following components: compound asphalt, rubber operating oil, plastomer modifier, elastomer modifier, filler; the compound asphalt is 10# asphalt and 50# asphalt with a content weight ratio of 1:4‑9 and the flash point of the compound asphalt is ≥240°C, and the asphaltene content is ≥23wt%. The modified asphalt waterproof membrane rubber prepared by the composition provided by the present invention has a stronger bonding force between the waterproof membrane and the concrete base surface, and the overlap between the membrane and the membrane. At the same time, the waterproof membrane also has Excellent heat aging low temperature performance.