6results about How to "Improve reaction stability" patented technology

This invention discloses a graphene oxide / carbon nanotube-based coal combustion catalyst, its preparation method, and its applications, belonging to the field of catalytic combustion technology for efficient coal utilization. First, graphene oxide is used as a carrier, and then carbon nanotubes and manganese oxide are grown on its surface in a one-step process using condensation and redox reactions, followed by co-firing with coal. The graphene oxide / carbon nanotube-based combustion catalyst prepared by this invention effectively improves combustion efficiency, reduces the ignition temperature of coal, and lowers the reaction activation energy, resulting in significant economic benefits and broad application prospects.

The application relates to the field of polyurethane foaming materials, and discloses a low-VOC polyurethane foaming compound and a preparation method thereof; the low-VOC polyurethane foaming compound comprises A component and B component which are mutually packed, the A component comprises low-aldehyde polyether polyol, polyether carbonate polyol, functionalized polyurethane oligomeric polyol, reactive tertiary amine catalyst, foam stabilizer and water, and the B component comprises a low-free-monomer isocyanate component; the functionalized polyurethane oligomeric polyol is prepared by reacting polyether carbonate polyol, diisocyanate and a hydroxyl compound containing a 1,3-dicarbonyl structure and having two or more hydroxyl groups. The preparation method comprises the steps of functionalized polyurethane oligomeric polyol preparation, A component dispensing, B component dispensing and packing. By introducing the reactive oligomeric polyol with the 1,3-dicarbonyl structure into the foaming system, the volatile components brought by raw materials can be reduced, and the continuous control ability of aldehyde components in the foaming process and the post-maturation process can be improved.

This invention belongs to the field of smart city information technology, specifically relating to an automated steady-state control method for industrial robots in the continuous production of recycled ABS plastics. It covers the entire continuous operation of recycled ABS from material conveying and reaction plasticization to finished product output. Employing core algorithms such as dynamic coordination of material conveying and reaction demand, steady-state control of multi-parameter coupling in the reaction process, and full-process quality data chain traceability, it overcomes the technical bottlenecks of traditional continuous recycled ABS production, including "disconnected conveying, process fluctuations, and lack of traceability." This achieves precise coordination of continuous material conveying, stable and controllable reaction processes, and traceable quality control of finished products, significantly improving the stability, production efficiency, and quality reliability of continuous recycled ABS production, and adapting to the automated production needs of large-scale continuous recycled ABS products.

The present application relates to mixed reaction device, more particularly to fixed reactor technical field, and disclose a kind of viscous material mixing reaction device containing pitch and its process, including horizontal reactor and with one body kettle body, the kettle body is provided with driving portion, the driving portion is connected with positioning portion and swing portion, the positioning portion and swing portion are connected with reaction portion, the reaction portion is connected with material shaking portion, the horizontal reactor is provided with feeding port, the feeding port is equipped with feeding portion, the driving portion includes driving motor, the driving motor is installed on the shell of horizontal reactor, by the cooperation of helical blade and stirring rod, the rotation of stirring rod is realized in the process of revolution by viscous material flow, cooperate with the swing action of hinged ring one as axis, realize multidimensional strong disturbance mixing, different from traditional single stirring form, significantly improve material dispersion uniformity and reaction consistency, guarantee the overall stability of finished product.

This invention belongs to the field of catalytic ammonia oxidation technology, and specifically relates to a Ru / AMn2O4 catalyst for the gas-solid phase synthesis of methacrylonitrile, its preparation method, and its application. The catalyst preparation includes the preparation of an AMn2O4 spinel support, AMn2O4 spinel support pretreatment, and Ru / AMn2O4 catalyst preparation. The catalyst of this invention, prepared by the above method, possesses advantages such as high activity at low temperature, high stability, high conversion rate of methacrolein, high yield of methacrylonitrile, and low yield of the byproduct hydrogen cyanide. It is particularly suitable for use as a catalyst in the gas-solid phase ammonia oxidation of methacrolein to methacrylonitrile.

The invention discloses a cobalt-based catalyst and a preparation method and application thereof, the cobalt-based catalyst is obtained by at least taking a cobalt-based precursor and an organic nitrogen source as raw materials through in-situ carbonization treatment; wherein the raw materials of the cobalt-based precursor at least comprise a cobalt salt, a zinc salt and an imidazole organic ligand. The preparation method comprises the following steps: dissolving cobalt salt and zinc salt in water to obtain a metal salt aqueous solution; the preparation method comprises the following steps: dissolving an imidazole organic ligand in water to obtain an imidazole organic ligand aqueous solution; the preparation method comprises the following steps: mixing a metal salt aqueous solution and an imidazole organic ligand aqueous solution, heating, aging, collecting a solid product, washing and drying to obtain a catalyst precursor; and mixing the catalyst precursor with an organic nitrogen source, and carrying out in-situ carbonization treatment to obtain the catalyst. The cobalt-based catalyst shows excellent catalytic activity and selectivity in the methanol oxidative carbonylation reaction, has good reaction stability, can still keep high methanol conversion rate and DMC selectivity after being recycled for five times, and has good industrial application potential.