3results about How to "Add a small proportion" patented technology

The invention discloses a brominated flame-retardant polyamide composition capable of improving air trapping. The brominated flame-retardant polyamide composition comprises the following components in percentage by mass: 30.0-80.0 wt% of aliphatic polyamide; 10 to 30.0 wt% of a brominated flame retardant; 3.0 to 10.0 wt% of a flame retardant synergist; 0.3 to 5.0 wt% of aromatic zinc carboxylate; or also comprises the following components: 5.0-50.0 wt% of a reinforcing agent; the sum of all the components is 100 wt%, and the composite material is prepared by melt blending and processing through a single-screw or double-screw extruder. According to the brominated flame-retardant polyamide composition disclosed by the invention, the defect that the fire resistance of a thermoplastic composition is influenced by an acid remover and zinc oxide is avoided by utilizing the aromatic zinc carboxylate, the air trapping phenomenon can be obviously improved, and the brominated flame-retardant polyamide composition has stable flame retardance and excellent mechanical property.

The application discloses a method for continuously preparing high-purity sulfolane, and belongs to the technical field of organic synthesis. By introducing a solvent and a stable free radical type polymerization inhibitor, the self-polymerization of butadiene is effectively inhibited. By adopting a cooling crystallization mode to remove sulfur dioxide, the thermal decomposition of sulfolene sulfone is avoided, high yield and high purity are realized, the service life of a hydrogenation catalyst is not affected, and the catalyst can be completely reused. The cooling crystallization also realizes the separation of the polymerization inhibitor and sulfolene sulfone. The polymerization inhibitor is dissolved in the solvent and recycled, and does not enter the hydrogenation system, so that the final sulfolane product has a purity of above 99.9% and has no chromaticity problem. The process saves energy consumption, the solvent has wide universality, operation is simple, the process is safe and environment-friendly, easy to scale up, and meets the green production requirements.

The invention relates to the technical field of preparation of active carbon materials, in particular to a method for preparing a biomass porous carbon material through a coupling activation method and application of the biomass porous carbon material. The preparation method comprises the following steps: by taking waste biomass such as cassava peel as a raw material, performing fermentation, acid leaching activation, low-temperature carbonization, alkali activation, ultrasonic acid pickling and high-temperature impurity removal to obtain the biomass-derived porous carbon material, and performing electron microscope analysis and pore detection on the biomass-derived porous carbon material prepared by the steps. The biomass derived porous activated carbon material is of a porous layered structure and has abundant micropores and mesopores; according to the present invention, the electrochemical test experiment detection results show that the biomass derived porous carbon material has excellent capacitance performance, and when the current density is 0.5 A / g, the specific capacity value range is 200-400 F / g; the material also has good stability, the biomass derived porous carbon material is assembled into a symmetric supercapacitor, and after 10000 circles of stability tests, the retention rate of the specific capacitance of the symmetric supercapacitor can be maintained to be 90% or above.