30results about How to "Realize green recycling" patented technology

The invention relates to a green recycling method for a honeycomb denitrification catalyst, which belongs to the field of flue gas denitrification and material recycling. Two process routes of regeneration and re-preparation are set up, and the regeneration production line and the re-preparation production line are arranged side by side; the regeneration process or the re-preparation process is selected according to the performance of the waste honeycomb denitrification catalyst for green recycling; the regeneration process and the re-preparation process The basis for selection is: the axial and radial compressive strengths of spent honeycomb denitration catalysts are ≥1.0 and ≥0.2MPa respectively, and the specific surface area is ≥40.0m 2 / g, the regeneration process route is selected; otherwise, the re-production process route is selected. The green recycling method of honeycomb denitrification catalyst provided by the present invention combines regeneration and re-preparation process, fully utilizes the valuable components in the spent denitrification catalyst, and greatly saves the amount of water, which can realize the closed loop of denitrification catalyst recycle.

The invention relates to equipment and a method for thermal removing of paint layers of waste metals. The removing equipment comprises a feed bin (1), a feed inlet (2), a gate valve 1 (3), a valve 1 (4), an isolation bin 1 (5), a valve 2 (6), a gate valve 2 (7), a valve 3 (8), a heating furnace (9), a furnace tube (10), a mechanical pump (11), a valve 4 (12), a gate valve 3 (13), an isolation bin 2 (14), a valve 5 (15), a valve 6 (16), a gate valve 4 (17) and a base (18). The equipment has the functions of carrying out drying and pollution-free thermal paint removing on the waste metals containing the paint layers. The method for removing the paint layers on the surfaces of the waste metals, disclosed by the invention, comprises the steps of material drying and controllable oxygen partial pressure rotary continuous thermal paint removing. The equipment and the method, disclosed by the invention, have the characteristics of heating uniformity, high paint removing efficiency and no pollution and can be widely applied to waste metal recovery.

The invention relates to the field of secondary resource comprehensive utilization of spent platinum catalysts, in particular to a green recycling method of a spent platinum catalyst. The green recycling method of the spent platinum catalyst is sequentially carried out according to the following steps of A, pretreating materials; B, compounding and mixing the materials; C, melting through an electric-arc furnace; and D, preparing powder through an iron alloy. According to the green recycling method of the spent platinum catalyst provided by the invention, an applicable material range is wide,a carrier dissolving effect is good, the platinum group metal enriching times is high, the platinum group metal content in enriching residues is high, the platinum group metal recovery is high, and the equipment corrosion is low. The precious metal recovery rate is high, the material applicability is high, the usage of auxiliary materials is reduced, the energy is saved, the consumption is reduced, and the production cost is low.

The invention discloses a preparation method of bupropion hydrochloride. M-chlorophenylacetone is used as a raw material to take bromination reaction with sodium bromide, sulfuric acid and hydrogen peroxide in a water-halohydrocarbon solvent to prepare a brominated intermediate; then the prepared bromide reacts with tert-butylamine to prepare amfebutamone, after the reaction for preparing amfebutamone is completely reacted, the water is directly added, after a reaction solution is layered, the layered organic layer is cleaned and distilled to obtain amfebutamone, and obtained amfebutamone is acidified by virtue of isopropanol hydrochloride to obtain bupropion hydrochloride; and the peparation process of amfebutamone, the alkalinity of a water layer obtained after the layering of the reaction solution is adjusted by using sodium hydroxide, after tert-butylamine is recovered in a distillation manner, the water layer comprising bromine ions is concentrated, the pH value is adjusted to beneutral by using sulfuric acid, the obtained aqueous solution comprising sodium bromide is used for taking the bromination reaction again so as to be circularly utilized. By adopting the preparation method, the environment-friendly circular utilization of bromine is realized, and the production cost is reduced.

The invention belongs to the technical field of recycling waste power lithium-ion batteries, and specifically relates to a green recycling method for the positive electrode of waste lithium iron phosphate batteries. In the present invention, sodium carbonate is used as a recovery aid to recycle waste lithium iron phosphate, and a series of process routes such as ball milling, solid-phase sintering, pulping and filtration, and evaporation crystallization are used to realize the recycling of the positive electrode of waste lithium iron phosphate batteries. The method is characterized in that it can realize the recovery of all the elements of the positive electrode of the waste lithium iron phosphate battery, and the recovered products are Li x Fe y o 2 (0.5≤x≤1, 1≤y≤2.5, 0.2≤x:y≤1) and Na 3 PO 4 12H 2 O, has the advantages of simple operation, low cost, and easy industrialization.

The invention relates to application of a chromium metal organic framework material to olefin polymerization, and belongs to the technical field of metal organic framework material catalysis. The chromium metal organic framework material is applied to catalysis of a polymerization reaction of olefin polymerization as a catalyst and preparation of a high-polymer composite material coated with the chromium metal organic framework material as a raw material. When the chromium metal organic framework material is applied to catalysis of the polymerization reaction of olefin polymerization as the catalyst, the framework material has high polymerization activity and high selectivity, and an obtained olefin polymer has a high molecular weight; in particular, when the framework material is appliedto catalysis of polymerization of isoprene, the selectivity of cis-1,4-polyisoprene is up to 95 percent, the molecular weight is up to 1,880,000, the molecular weight distribution is narrow, and the dispersion coefficient can be up to 1.17; the chromium metal organic framework material can be taken as a raw material in olefin polymerization, and is used for preparing the high-polymer composite material coated with the chromium metal organic framework material, so that the problems of complex preparation process and high cost are solved, and the obtained composite material has high heat stability and high carbon dioxide adsorption amount, and is environmentally friendly and economical.

The invention discloses a method for recycling cane sugar factory boiler ash sluicing water. The method comprises steps as follows: firstly, a solid-liquid mixture in the cane sugar factory boiler ash sluicing water is separated by a filter type continuous centrifuge, a filtrate and ash are obtained, the filtrate is recycled to sluice ash in a boiler, collected and entrapped ash is dried and then subjected to microwave-assisted activation treatment, activated ash is obtained and mixed with a raw sugar liquid, stirring is performed under conditions that the temperature of a mixed solution system is 50-95 DEG C and the pH value is adjusted to 6.5-7.5 through addition of lime milk, filtration is performed, and a filtered clear liquid and an ash filter cake entrapped to be used as fertilizer are obtained. According to the method, the ash in the waste cane sugar factory boiler ash sluicing water is used as a raw material, rational resource utilization and environmental protection are facilitated, a prepared activated ash particle product is high in quality, an application of the product is organically combined with a continuous sugar production decoloring technology, a sugar liquid can be effectively clarified, and the method has the good economic benefit, social benefit and ecological benefit.

The invention provides a sintering process red mud modifier, a modified red mud roadbed and a construction method of the modified red mud roadbed. The sintering process red mud modifier is prepared from, by weight, 153-231 parts of desulphurization gypsum, 77-154 parts of phosphogypsum, 83-230 parts of quick lime and 206-385 parts of cement. According to the basic principle, an inorganic modifiedmaterial and sintering process red mud are subjected to a series of physical and chemical reactions to reduce the pH value of the sintering process red mud and improve the unconfined compressive strength and road performance of the sintering process red mud. The sintering process red mud modified with the modifier has high 7-day and 28-day unconfined compressive strength and has a pH value of 9.80or below. The sintering process red mud modifier, the modified red mud roadbed and the construction method of the modified red mud roadbed have the advantages that multiple industrial solid wastes and a traditional inorganic binder are adopted for compound modification of the sintering process red mud, and thus the sintering process red mud can not only meet environmental protection requirementsand road performance requirements, but also be applied to filling of roadbeds on a large scale.

The invention discloses a low-cost black FDM printing wire prepared by using recycled cigarette film masterbatch and its preparation method and application. The black FDM printing wire consists of 5-40 parts by weight of recycled cigarette film masterbatch, polylactic acid It is prepared from the raw material composition of 60-95 parts, 0.2-3 parts of compatibilizer, 0.5-1 part of toughening agent, 0.5-1.5 parts of auxiliary agent and 0.5-1 part of white oil. The preparation method is to weigh each raw material according to the formula ratio and add it to a high-mixer to stir to obtain material a; extrude through a twin-screw extruder, then cut to obtain material b, and extrude through a die on the twin-screw extruder to obtain the target product . The invention adopts the blending of low-density polyethylene (PE) and polylactic acid (PLA) from cigarette film recycling masterbatch in Yunnan area to prepare polymer wire suitable for black 3D printing. The invention can find a black masterbatch for 3D printing PLA wire Inexpensive substitute, good coloring effect, uniform and no color cast, broaden the application range of recycled cigarette film masterbatch, realize green recycling of PE polymer materials, and provide novel 3D printing filaments.