3results about How to "Control reactivity" patented technology

The present application belongs to the technical field of CHDM preparation process, and discloses a catalyst multi-bed steady-state grading loading method in a two-stage hydrogenation process in CHDM preparation process. A plurality of layers of catalyst multi-bed are arranged in the reactor in the two-stage hydrogenation process; the temperature at the catalyst bed in the reactor in the first-stage hydrogenation process is set to 135-170 DEG C, the temperature at the catalyst bed in the reactor in the second-stage hydrogenation process is set to 200-210 DEG C, and the number of layers of catalyst bed in the reactor in the first-stage hydrogenation process is more than that in the reactor in the second-stage hydrogenation process by one layer. The present application has the advantages of improving production efficiency, reducing production cost, ensuring the safety of operating personnel, improving catalyst utilization, optimizing reactor operation efficiency, etc. The present application has good practicability and popularization value.

The application discloses a resin composition and application thereof, and the resin composition comprises, in terms of solid weight, 10-70 parts of a benzoxazine resin containing unsaturated bonds, and 20-100 parts of a maleimide resin; wherein the benzoxazine resin containing unsaturated bonds is a mixture of a benzoxazine resin containing double bonds and a benzoxazine resin containing triple bonds. Compared with the prior art, the resin composition and application thereof can not only control the reactivity between the maleimide resin and the benzoxazine resin, improve the crosslinking network density, but also is beneficial to controlling the production speed of prepreg, and the prepreg has good apparent quality, and meanwhile has excellent high heat resistance, high modulus, low water absorption, low thermal expansion coefficient and low curing shrinkage.

The application discloses a device and method for preparing methanol by using low-temperature plasma and catalysts. The device uses low-temperature plasma to generate discharge and activate H2 and CO2 in a plasma reactor, so that the thermal catalytic reaction rate is improved and the energy consumption is reduced. Condensed water is introduced outside the low-temperature plasma to improve the conversion rate and selectivity of the reaction. The gas treated by the low-temperature plasma is sent into a thermal catalytic reactor, the thermal catalytic reactor is provided with a partition plate, so that a reflux is formed at a local position in the thermal catalytic reactor, and a plurality of catalyst outer bed layers are arranged outside and inside the partition plate, so that different kinds of solid catalysts can be filled at different positions. The application can make the CO2 methanol reaction be carried out at normal pressure, reduce the energy consumption, activate the raw material gas by using a low-temperature plasma array, improve the thermal catalytic reaction rate, and reduce the energy consumption of the thermal catalysis. The multi-layer catalyst outer bed layer structure is used to control the reaction path and the product and improve the methanol yield.