40results about How to "Simplify recycling steps" patented technology

The invention discloses a method for comprehensively recycling phosphorus and rare earth from rare earth phosphorite containing monazite. The method includes the following steps that rare earth phosphorite containing monazite is obtained from phosphoric acid in a leaching manner, and a monocalcium phosphate solution containing rare earth and slag containing monazite are obtained through filtration; the monocalcium phosphate solution containing rare earth is processed through a precipitation method, dissolved rare earth precipitates, a monocalcium phosphate solution and rare earth slag containing phosphoric acid are obtained through filtration, and the rare earth slag containing phosphoric acid and slag containing monazite are mixed to form mixed slag; and phosphorus in the monocalcium phosphate solution is recycled, and rare earth in the mixed slag is recycled. Acid leaching is conducted by adding phosphoric acid, phosphorus in rare earth phosphorite containing monazite forms monocalcium phosphate high in solubility, and therefore monazite existing in a precipitation manner and phosphorus can be separated. Then, the monocalcium phosphate solution containing rare earth is processed through the precipitation method, and rare earth and phosphorus elements in phosphorite can be effectively separated. Rare earth and phosphorus are effectively separated through two times of separation steps, and therefore the rare earth recycling rate is increased.

The invention relates to a method for separating a positive electrode, a negative electrode and a diaphragm of a LiFePO4 battery. The method comprises the following steps: a, mechanically crushing a core (comprising a mixture of the positive electrode, the negative electrode and the diaphragm) of a shelled LiFePO4 battery into fragments with the sizes of 1 cm<2> to 100 cm<2>; b, uniformly feeding the fragments to a conveying belt by using a feeding machine, wherein the fragments are flatly paved on the conveying belt and move forwards at a constant speed, and a magnet is arranged above the conveying belt or a magnetic roller is adopted to separate the magnetic positive electrode material from negative electrode material and the diaphragm; and c, soaking the negative electrode material and the diaphragm material, which are obtained after the positive electrode material is separated, into water, collecting the diaphragm material which floats on the upper layer, and refloating and collecting the negative positive electrode material which is settled at the bottom so as to separate the negative electrode from the diaphragm. With the method, the positive electrodes, the negative electrodes and the diaphragms of the LiFePO4 batteries can be separated conveniently, quickly and efficiently on a large scale, and possible environmental harm caused by organic solvents, high-temperature heating method and the like is avoided.

The invention discloses a comprehensive low-energy consumption recycling method of a waste plasma screen and belongs to the field of industrial waste regeneration. The method comprises that a), the waste plasma screen is roughed, so that the maximum range between any two points of the waste plasma screen ranges between 5cm and 30cm; b), the roughed waste plasma screen is added into a salpeter solution for leaching, during leaching, ultrasonic wave activating treatment and stirring are conducted; and c), silver is recycled from an obtained solution which is subjected to nitrate leaching. According to the method, the step that the plasma screen is required to fine grinding is reduced, the energy consumption is reduced, the leaching time is reduced, the efficiency is improved, and the problems that for a long time, technical workers in the field hold a technical bias that the granularity has to be reduced as possible in order to improving the leaching efficiency, and glass is easy to bond when encountering water are solved. The method is low in energy consumption, high in efficiency, capable of preparing silver with the purity of more than 99.9% and being processed in large scales, and suitable for being popularized and applied in the field.

The invention discloses modified hydroxyethyl methyl cellulose for an enhanced ceramic tile adhesive. The modified hydroxyethyl methyl cellulose is prepared from the following raw materials in percentage by mass: 54%-94% of hydroxyethyl methyl cellulose, 5%-40% of starch ether, 0.5%-3% of a dispersing agent and 0.5%-3% of a rheological agent, wherein the hydroxyethyl methyl cellulose is prepared from cellulose powder, caustic soda granules, caustic soda liquid, chloromethane and ethylene oxide. The preparation method comprises the following steps: (1) weighing the raw materials, (2) mixing cellulose powder, caustic soda particles, liquid caustic soda, chloromethane and ethylene oxide, carrying out etherification reaction, and then sequentially carrying out neutralization, washing, centrifugation, drying and crushing to obtain hydroxyethyl methyl cellulose, and (3) mixing and stirring hydroxyethyl methyl cellulose, starch ether, a dispersing agent and a rheological agent to obtain the adhesive. The obtained product is stable in quality, has the function of improving the tensile bonding strength of the ceramic tile adhesive, is applied to modern ceramic tiles with large sizes and large masses, and can remarkably improve the use safety of the ceramic tiles.

The invention relates to a method for preparing a pyrrolopyrrole-1,4-diketone derivative (the pyrrolopyrrole-1,4-diketone derivative can be used for preparing organic pigments). The method includes the main step: a target object is obtained through the reaction of succinic acid dialkyl ester and a nitrile compound at a temperature of 60 DEG C-140 DEG C in a sodium tert-pentoxide or potassium/tert-amyl alcohol medium. The method is characterized in that firstly, the adopted succinic acid dialkyl ester is succinic acid di-tert amyl ester; and secondly, after the reaction of succinic acid ditertiary amyl ester and the nitrile compound is stopped, the obtained mixture is heated and dried at the vacuum degree of 1-2 mmHg, the escaped tert-amyl alcohol is recovered at the same time, after heating and drying, the mixture heated and dried is transferred to a hydrolyzing reactor and diluted by carbinol/water, the generated sodium hydroxide is neutralized through inorganic acid, and the target object is obtained through liquid/solid separation. According to the invention, the steps for tert-amyl alcohol recovery are simplified, further, the cost in preparing the pyrrolopyrrole-1,4-diketone derivative is reduced.

The invention relates to a preparation method for a Fe and Cu bi-metal loading mesoporous carbon and alumina composite ceramic membrane material, and the application of the ceramic membrane material.An aluminium oxide hollow ceramic tube is dried in a drying oven; the Fe(NO3)3.9H2O and the Cu(NO3)2.3H2O of a mesoporous carbon precursor are added to be dissolved in absolute ethyl alcohol, mixtureis heated in a water bath and dripped into the ethanol solution of the mesoporous carbon precursor; the mixture is poured into watch glass and is evaporated at a room temperature to obtain a thick Feand Cu mesoporous material; two ends of a pre-prepared aluminium oxide ceramic tube carrier are blocked, and the thick Fe and Cu mesoporous material is smeared to the outer surface of the aluminium oxide ceramic tube carrier; rotary curing is carried out to obtain an even membrane layer; the ceramic tube membrane is dried in vacuum to obtain the Fe and Cu bi-metal loading mesoporous carbon and alumina composite ceramic membrane material. The composite ceramic membrane is used for degrading an ofloxacin solution which passes through the bi-metal loading layer, degradation time is the residencetime of the ofloxacin on the ceramic membrane, and the degradation rate of the ofloxacin in short time can be 90%.

The invention discloses a metal organic framework multi-enzyme composite catalytic material, a preparation method, and application and use method of the metal organic framework multi-enzyme composite catalytic material. The composite catalytic material comprises formate dehydrogenase, formaldehyde dehydrogenase, methanol dehydrogenase, UDP-glucose dehydrogenase and an MOF material, and is provided with a hollow capsule cavity; the formate dehydrogenase, the formaldehyde dehydrogenase and the methanol dehydrogenase are wrapped in the capsule cavity, and the UDP-glucose dehydrogenase is immobilized in the MOF material. According to the composite catalytic material of the invention, CO2 can be effectively recycled to provide a potential method for solving the greenhouse effect, repeated utilization can be implemented through immobilization and cyclic regeneration of cofactors while relatively high catalytic activity is kept, and a high-value industrial product is synthesized by a low-cost and environment-friendly method.

The invention discloses a nepenthes type aluminum scrap recycling treatment process, and belongs to the field of metal waste recovery. The nepenthes type aluminum scrap recycling treatment process hasthe beneficial effects that the two steps of screening and impurity removal, and magnetic separation and iron removal are combined in one step through the use of a nepenthes type screening barrel, sothat the aluminum scrap recovery process is simplified, and the time of the aluminum scrap recycling treatment is saved to a great extent, and the efficiency of the aluminum scrap recycling treatmentis remarkably improved; meanwhile, nepenthes type special-shaped sleeve pipes in screening holes are used so as to enable the probability that aluminum scraps are gotten stuck in the screening holesto be reduced, and the service life of a screen is prolonged; and meanwhile, nano-scale micropores of the nepenthes type special-shaped sleeve pipes and lubricating oil inside the nepenthes type special-shaped sleeve pipes are used, so that the aluminum scraps gotten stuck in the screening holes are just like insects preyed by nepenthes and are very difficult to stay in the screening holes; and even if the aluminum scraps are gotten stuck, when the aluminum scraps are taken out, the screen can be effectively protected due to the reduction of the friction, so that the probability that the screen is damaged by the aluminum scraps is reduced, and the cost investment of the aluminum scrap treatment is reduced.

The invention discloses a method for recovering metal rubidium resources in pyrrhotite tailings. The method comprises the following steps: (1) crushing tailings, and carrying out superconducting magnetic separation; (2) preparing ore pulp from the magnetic separation tailings in the step (1), adding sodium carbonate, fully stirring, adding a flotation agent, and carrying out air flotation; and (3)enabling sulfuric acid to be added into the tailings, after full stirring, enabling a flotation agent to be added for air flotation, and obtaining rubidium concentrate with the relatively high grade.Compared with the prior art, the method has the advantages that the recovery step of the metal rubidium in the tailings is simplified, meanwhile, the recovery rate of the rubidium is improved, and arelatively good preposition step is provided for further industrial purification of the rubidium or the rubidium-containing compound.

The invention discloses a process for recovering sugar liquor in preserved fruit production. the process comprises the following steps of (1) filtering sugar liquor to be treated to remove suspended matters, and adding complex enzyme for full reaction; (2) adding citric acid into the sugar liquor obtained in the step (1), and regulating the pH value of the sugar liquor; (3) adding an absolute ethyl alcohol solution, fully stirring and standing; (4) filtering the sugar liquor after standing, and then heating the sugar liquor; (5) adding activated carbon into the heated sugar liquor, fully and uniformly mixing and filtering, and (6) enabling the sugar liquor in the step (5) to pass through an ion exchange column to obtain recovered sugar liquor. Compared with the prior art, according to thescheme, the sugar liquor can be recycled within a reasonable cost range, and therefore the sugar liquor can be repeatedly used. Therefore, the purpose of fully utilizing raw material resources is achieved, and the method has highly important significance.

The embodiment of the invention provides a space recovery method, device and equipment. A plurality of storage structures corresponding to different utilization rates are set; when data is written into any data block in a plurality of data blocks in the storage system, the utilization rate of the data block is calculated, and the data block identifier of the data block is stored in the corresponding storage structure based on the utilization rate when the data block is full; and in response to the space recovery instruction, a plurality of data blocks corresponding to the at least one storage structure are selected to perform data migration according to the arrangement sequence of the utilization rates from small to large. According to the technical scheme provided by the embodiment of the invention, the recovery efficiency of the storage system in the space recovery process can be effectively improved.