9results about How to "Reduce solid waste" patented technology

The invention provides a treatment method of 6-aminocapronitrile synthesis reaction residues from caprolactam, which comprises the following steps: firstly, feeding the 6-aminocapronitrile synthesis reaction residues from caprolactam and fresh water into a stirred tank reactor for primary hydrolysis reaction, and fixing a catalyst on a stirring paddle through a metal wire mesh; then the reaction liquid and ammonia gas enter a multi-section gas-liquid two-phase tower reactor and sequentially pass through reaction sections filled with metal oxides, molecular sieves and solid base catalysts, and deep hydrolysis of polymers, decomposition of aminocaproic acid and ammonolysis of caprolactam are achieved. According to the method, the hydrolysis rate is larger than or equal to 94%, the yield of 6-aminocapronitrile is larger than or equal to 90%, the method has the advantages of being capable of deeply hydrolyzing residues, simple in process and continuous in operation, the problems of insufficient hydrolysis and intermittent operation in the prior art are solved, the solid waste discharge amount in the hexamethylenediamine production process is greatly reduced, cost is reduced, economic benefits are improved, and the method is suitable for industrial production. A guarantee is provided for green, environment-friendly and safe production.

This utility model relates to the field of pharmaceutical and chemical production equipment, and in particular to a modular self-cleaning pharmaceutical synthesis filter, including a treatment box and a collection box. The treatment box has first electric slide rails installed on both its front and rear sides. A first base is slidably connected between the two first electric slide rails, and a filter element is slidably connected inside the first base. A second base is connected to the top of the first base, and a placement rack is slidably connected inside the second base. An activated carbon filter assembly is placed in the placement rack. The bottom of the portion of the first electric slide rail extending out of the treatment box is connected to a sliding frame, and the front and rear sides of the collection box are slidably connected to the sliding frame. Through the coordinated control of the first and second electric slide rails, the first and second bases can be slidably replaced independently. Therefore, only the second base needs to be driven to replace the activated carbon filter assembly, while the filter element is retained for continued use through its self-cleaning function. This breaks the traditional linked replacement mode, extends the filter media life, and reduces operating costs.

The invention discloses a method and equipment for processing and producing second-class base oil by taking first-class base oil regenerated by waste lubricating oil as a raw material, and belongs to the technical field of regenerated lubricating oil. Atmospheric and vacuum distillation is combined with NMP solvent refining, and the waste lubricating oil is regenerated into qualified first-class base oil to serve as an exclusive raw material; preheating the raw material to 60-80 DEG C under the protection of nitrogen, and introducing the preheated raw material into an adsorption column at a flow rate of 0.5-2.0 BV / h, so that the raw material sequentially passes through a macroporous silica gel layer (the particle size is 0.1-1.5 mm) and an active white clay layer (the mass ratio of the macroporous silica gel layer to the active white clay layer is 2: 1) with specific parameters, and deep synergistic adsorption refining is carried out; after the refined oil enters a storage tank, vacuum is applied to suck residual oil in the column into the tank, and second-class base oil is obtained after heat preservation sedimentation and precise filtration. Under the mild non-hydrogenation condition, high added value upgrading of the waste lubricating oil is achieved, and the method has the comprehensive advantages of being efficient in process, high in product yield, stable in quality and low in energy consumption and cost.

The application discloses a system and process for removing perfluorooctanoic acid by integrating coagulation sedimentation and modified activated carbon adsorption, and belongs to the technical field of water pollution treatment. The system comprises a container frame, a support frame is arranged on the upper portion of the container frame, an adjusting tank, a coagulation sedimentation tank and a modified activated carbon adsorption tank are sequentially arranged on the bottom of the container frame in the transverse direction and are communicated through pipelines, a first booster pump and an electromagnetic flowmeter are arranged on the pipeline between the adjusting tank and the coagulation sedimentation tank, a second booster pump is arranged on the pipeline between the coagulation sedimentation tank and the modified activated carbon adsorption tank, and the backwashing water outlet of the modified activated carbon adsorption tank and the water inlet of the coagulation sedimentation tank are communicated through a backwashing water return pipeline. The application adopts integrated and modular design and is provided with a closed loop return system, so that the removal rate of PFOA in wastewater can be effectively improved, and the problems of limited activated carbon adsorption capacity and difficult treatment of backwashing wastewater are solved.

This utility model discloses a foreign object-proof rice noodle extraction pipe structure, relating to the field of rice noodle processing technology. The utility model includes: a base plate, a flour mill mounted on the upper side of the base plate, a flour hopper mounted on the lower side of the flour mill, a conveying pipe fixedly connected to the lower side of the flour hopper, a cyclone separator mounted at one end of the conveying pipe, a shut-off fan mounted on the lower side of the cyclone separator, and an iron removal box mounted on the lower side of the shut-off fan, with an iron removal mechanism installed inside the iron removal box; a weighing hopper mounted on the upper side of the base plate, and a pneumatic gate valve mounted on the lower side of the weighing hopper. This utility model, by setting up a conveying pipe and a cyclone separator, improves the sealing effect during the conveying of rice noodle materials, preventing foreign object intrusion, preventing rice noodle from scattering and affecting the processing environment, reducing rice noodle loss, increasing yield, and reducing solid waste. The iron removal mechanism adsorbs and collects iron substances in the rice noodle materials, improving the quality of rice noodle processing.

The invention belongs to the technical field of chemical synthesis of medicines, and particularly relates to a synthesis method of an LXH-1211 intermediate. The preparation method comprises the following steps: carrying out stirring reaction on phenylhydrazine, 3-aminocrotonitrile and a reaction solvent to obtain an intermediate IM-1; mixing the intermediate IM-1 and a reaction solvent, cooling, adding phosphorus oxychloride, and heating for reaction to obtain an intermediate IM-2; and dissolving the intermediate IM-2 in a reaction solvent, adding ethyl cyanoacetate, and carrying out a stirring reaction to obtain the LXH-1211 intermediate. The raw materials are easy to obtain, use of highly toxic and explosive materials, column chromatography and other operations are avoided, the yield is remarkably improved, special equipment is not needed, industrial amplification is facilitated, and the environmental protection cost is effectively reduced.

This invention relates to the field of food safety testing technology and discloses a method for determining the residual amounts of amide alcohols and their metabolites in milk. The method involves adding an internal standard to a milk sample, followed by the addition of a composite desorption solvation reagent and shaking to induce the desorption of the target analyte from its protein-bound state into the free aqueous phase. Subsequently, magnetic HLB microparticles are introduced and an external magnetic field is applied to anchor the microparticles to the inner wall of the container for spatial isolation. Under these conditions, low-speed horizontal cross-flow is applied, and a phase transition triggering and cross-flow flocculation reagent is added dropwise to induce flocculation of protein impurities at the center of the system, simultaneously driving the free target analyte phase to transfer to the internal pores of the inner wall microparticles. Finally, after draining the central flocculation waste liquid, matrix washing, and targeted elution, quantitative analysis is performed using liquid chromatography-tandem mass spectrometry. This invention, through the combination of in-situ desorption and cross-flow phase transfer, avoids protein flocculants clogging the extraction channels, achieving simultaneous and efficient enrichment of impurities and target analytes.

The invention discloses spraying equipment for automobile part machining, and belongs to the technical field of automobile part machining, the automobile parts are hubs, the spraying equipment comprises a spraying cabin, a laminar flow air supply module is arranged at the top of the spraying cabin, a negative pressure suction assembly is arranged at the bottom of the spraying cabin, and the spraying cabin is used for forming piston type vertical airflow from top to bottom in the cabin; the over-sprayed paint mist is directionally conveyed to a recovery opening formed in the bottom; the rotating station is arranged in the spraying cabin, comprises a rotary table and a clamping assembly, and is used for clamping and driving the hub to rotate around a vertical shaft; the rotary dry type filtering module comprises a rotatable rotary tower, and a plurality of honeycomb paper boxes are evenly distributed on the rotary tower in the circumferential direction. An adsorption station, a desorption station and a drying regeneration station are sequentially arranged around the rotating tower in the rotating direction; the station isolating and sealing mechanisms are arranged between the adjacent stations and used for keeping sealed isolation between the stations when the rotating tower rotates; and the unification of environmental protection, energy conservation and efficient production can be realized.

This invention discloses a synergistic desulfurization and vanadium removal method for high-sulfur and high-vanadium petroleum coke. The method includes the following steps: crushing the high-sulfur and high-vanadium petroleum coke, mixing it with a Fe₂O₃ supported activated carbon catalyst and a NaOH / Na₂CO₃ mixed alkali in a specific ratio, and adding hydrogen peroxide to form a reaction slurry; placing the reaction slurry in a microwave-ultrasonic combined field and performing an oxidation reaction at 70–95°C; after the reaction, solid-liquid separation, washing, drying, and magnetic separation are performed to obtain purified petroleum coke. This invention activates the oxidant with a catalyst under alkaline conditions, making it easier for vanadium in the petroleum coke to undergo oxidation and dissolution, inducing the loosening of the local carbon skeleton structure, thereby promoting the exposure and further oxidation of organic sulfur, achieving synergistic removal of sulfur and vanadium. This method is simple, energy-efficient, allows for magnetic recovery of the catalyst, and enables the recycling of the leachate. It is suitable for the resource utilization of low-quality petroleum coke and has application value in the production of carbon anodes for aluminum electrolysis.