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

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 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 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.