6 results about "Induction period" patented technology

A method of preparing an enhanced reactivity pozzolan may include: contacting a starting pozzolan with a catalyst material to form a mixture of the starting pozzolan and the catalyst material; reacting the mixture of starting pozzolan and catalyst material during an induction period to form reaction products; and recovering the enhanced reactivity pozzolan.

A method of preparing an acid modified pozzolan may include: contacting a starting pozzolan with an acid to form a mixture of the starting pozzolan and the acid; reacting the mixture of starting pozzolan and the acid during an induction period to form reaction products; and recovering the acid modified pozzolan.

A method of forming a rigid plastic tray suitable for oxygen-sensitive products, the method comprising the steps of mixing PET with an oxygen scavenging polymeric composition in an extruder device comprising at least one extruder screw and a melt-processing zone, wherein the PET has an antimony content of less than 46 ppm; commuting the PET and the oxygen scavenging composition through the melt-processing zone of the extruder at a temperature of from about 250 to 300° C., at a total cycle time of less than about 6 minutes and a pressure of from 0 to 900 psig, to form a melted plastic mixture; extruding the melted plastic mixture into a sheet material; thermoforming the sheet material into a rigid plastic tray.

A method of preparing an enhanced reactivity pozzolan may include: contacting a starting pozzolan with a catalyst material to form a mixture of the starting pozzolan and the catalyst material; reacting the mixture of starting pozzolan and catalyst material during an induction period to form reaction products; and recovering the enhanced reactivity pozzolan.

The application provides a self-catalytic reaction intensity grading method based on isothermal induction period characteristics. The method is based on the shape difference of the reaction curve, and first divides the self-catalytic reaction into four intensity grades according to the isothermal induction period characteristics. In the experiment, the sensitivity of the induction period characteristics of the curve to the temperature change is analyzed by carrying out isothermal tests at two or more different temperatures, so that the intensity grade of the self-catalytic reaction can be determined. In the theoretical aspect, the self-catalytic intensity grades of three classical models in different orders are determined through theoretical derivation, and for the self-catalytic reaction of a known reaction function, the corresponding self-catalytic reaction intensity grade can be quickly determined. The method can directly determine the self-catalytic intensity through the experimental curve characteristics, and can also grade from the model parameter angle, which is simple to operate, directly related to the induction period factor in risk analysis, and provides an important basis for quickly evaluating the reaction risk.

The application belongs to the technical field of semiconductor light-emitting materials, and particularly relates to a size-controllable quantum dot, a preparation method thereof and application thereof. The quantum dot is prepared by the following method: a sample in an induction period of a quantum dot pre-nucleation stage is dispersed in a solvent, and the reaction is carried out at a temperature of 25-105 DEG C for 0.5-24h. The application can accurately control the particle size of the quantum dot and further adjust the light-emitting characteristics of the quantum dot, can effectively expand the application of the quantum dot, and has a good application prospect.