6results about How to "Realize multiple recycling" patented technology

The invention relates to a cyclic utilization method of a maleic anhydride epoxidation catalyst. The method comprises the following steps: completely introducing a synthesized epoxy succinic acid reaction solution into an anion exchange column, adsorbing anions of a catalyst by using anion exchange resin, leaching the anion exchange column by using pure water, applying leacheate and the adsorbed reaction solution to synthesis of polyepoxysuccinic acid, adding quantitative maleic anhydride and water into a reaction kettle, and reacting for 2-4 hours at the temperature of 60-80 DEG C; and dropwise adding liquid alkali for hydrolysis, adding anion resin adsorbing the catalyst, heating, dropwise adding an aqueous hydrogen peroxide solution, then carrying out suction filtration, separating the anion resin from the epoxy succinic acid reaction solution, and continuously using the obtained anion resin and epoxy succinic acid reaction solution according to the steps to complete the recycling of the catalyst. According to the method, the specific anion resin is used for adsorbing the catalyst in the reaction system, and the catalyst and the adsorption resin can be recycled for multiple times only by adding the resin adsorbing the tungsten and molybdenum catalysts into the reaction system.

The application discloses a kind of X-ray irradiation discoloration recovery test methods and application of feldspar crystal, it is related to radiation detection and irradiation metrology technical field.Natural colorless transparent feldspar or natural light color transparent feldspar is irradiated with different X-ray radiation dose, its color changes from colorless transparent or light color transparent to gray, and the gray scale is related to irradiation dose;After the color of the feldspar is changed, it is treated at different temperatures, or irradiated with visible light LED, to seek the best recovery parameters to restore its color to the original color.The method of the application can evaluate the discoloration performance of feldspar crystal and seek its best recovery parameters.The discoloration effect of natural colorless or light color transparent feldspar is obvious, easy to observe with naked eye, and the gray scale is related to the irradiation dose, which can also meet the needs of "transparent observation and light protection" in radiation protection scenarios.

This utility model discloses a steel frame structure for wardrobe door panel installation, including a base, support columns, connectors, and crossbars. The base, support columns, and connectors are arranged in groups, with multiple groups provided. The base has an installation groove for one end of the support column to be embedded in. The connector is positioned to connect to the support column. The crossbar has a sliding groove, and the connector has a slider that mates with the sliding groove. This utility model can be used with various types of materials, and the overall structural stability remains unchanged after disassembly and reassembly, enabling multiple reuses and significantly reducing operating costs.

The invention provides a nano-composite microsphere supported copper catalytic material and a preparation method and application thereof, and belongs to the technical field of nano-composites.The carrier of the catalytic material is PS-CS-SiO2 nano-composite microspheres, the PS-CS-SiO2 nano-composite microspheres are composed of PS monodisperse microsphere powder, SiO2 and chitosan, and the load active component of the catalytic material is Cu < 2 + >. The PS-CS-SiO2 nano-composite microsphere has unique compatibility and space structure, and has larger surface area and more exposed complexing sites compared with a chitosan material, so that the complexing ability to copper is obviously enhanced, the contact with a reaction substrate is more sufficient, and the catalytic activity is higher when the chiral organic boride is prepared; in addition, the catalytic material can be recycled for multiple times, keeps excellent performance, and is very suitable for large-scale industrial application.

A method for recovering organic tin in a vinyl ether compound transesterification kettle liquid, comprising the following steps: 1) taking the vinyl ether compound transesterification kettle liquid, cooling to-10-40 DEG C, standing, until crystals are precipitated in the transesterification kettle liquid, filtering, or, cooling to-10-40 DEG C, adding 0.1-5% of organic tin powder in mass fraction to the transesterification kettle liquid, stirring and mixing uniformly, then standing, until crystals are precipitated in the transesterification kettle liquid, filtering; 2) adding a basic solution with a concentration of 5-8 wt% to the crystals obtained by filtering, in a mass ratio of 1:0.5-10, and heating to 25-60 DEG C, until flocculent substances appear on the surface of the basic solution, and filtering the lower aqueous phase; 3) washing the crystals obtained by filtering with water, then washing with an organic solvent, drying, to obtain organic tin. The process condition is mild and the operation is convenient, the recovered organic tin can be used repeatedly, the production cost of enterprises is reduced, and environmental pollution is avoided.

The application discloses a packaging box and a paperboard structure. The packaging box comprises a box body, a cover body and a lock. The box body defines an accommodating cavity inside, and has an opening. The box body comprises a first side plate and a second side plate. The cover body comprises a first cover plate and a second cover plate. The first cover plate is rotatably connected to the edge of the first side plate close to the opening, so as to cover and / or open the opening. The second cover plate is connected to the first cover plate. The inner side of the second cover plate is provided with a groove. When the first cover plate covers the opening, the second cover plate is located on the outer side of the second side plate away from the accommodating cavity. The lock comprises a locking part and a connecting part. The connecting part is rotatably connected to the edge of the second side plate close to the opening. The locking part is provided on the outer side of the second side plate away from the accommodating cavity, and is rotatably connected to the edge of the connecting part away from the second side plate. The lock is configured to be at least partially accommodated in the groove when the first cover plate covers the opening, and the locking part is spaced apart from the second side plate.