17results about How to "Improve removal effect" patented technology

The invention belongs to the technical field of anhydrous magnesium chloride production, and particularly relates to a preparation process of anhydrous magnesium chloride, which comprises the following steps: firstly, dissolving magnesium chloride hexahydrate in absolute ethyl alcohol to form a magnesium chloride ethanol aqueous solution, and then dehydrating the magnesium chloride ethanol aqueous solution by using a molecular sieve to obtain the magnesium chloride ethanol solution; carrying out secondary cooling, stirring crystallization, secondary solid-liquid separation and vacuum drying on the magnesium chloride ethanol solution to obtain high-purity anhydrous magnesium chloride; and recycling ethanol liquid obtained by solid-liquid separation and ethanol gas obtained by vacuum drying. The technical scheme provided by the invention is simple in process flow, low in energy consumption, low in equipment requirement, high in product yield and high in purity, and can be directly applied to the fields of electrolytic preparation of magnesium, catalyst carriers and the like.

This disclosure relates to a manganese-containing graphene composite material, its preparation method, and its uses. The method includes: mixing graphite, potassium permanganate, and concentrated acid, heating and reacting them, then adding water and stirring to obtain a mixed solution; mixing the mixed solution with optional hydrogen peroxide, and refluxing it under intermittent ultrasonic stirring, so that the resulting material is separated into solid and liquid phases to obtain a solid product; calcining the solid product under an inert atmosphere; the intermittent ultrasonic stirring step includes: (1) ultrasonic stirring for 5-30 min and then stopping for 10-60 min; (2) repeating step (1). The manganese-containing graphene composite material provided by this invention contains elements such as manganese, potassium, and sulfur. By refluxing under intermittent ultrasonic stirring, this invention enables the manganese-containing graphene composite material to have a large specific surface area, exhibiting excellent performance in reactions such as the removal of sulfur-containing compounds. On the other hand, the content of manganese ions and other substances in the wastewater is significantly reduced during the preparation process, effectively solving the problem of wastewater discharge pollution.

The utility model relates to a calcium carbide method acetylene wastewater treatment device, including treatment jar, aeration structure and spraying structure, its technical key point is: aeration structure includes upper aeration pipe group and lower aeration pipe group, and upper and lower aeration pipe group are respectively by longitudinal arrangement multiple aeration coil, and is equipped with openwork baffle between two adjacent aeration coil, and the bottom of upper and lower aeration pipe group is equipped with openwork support plate, and the top is equipped with openwork cover plate, the inlet pipeline outer end of spraying structure is connected with upper filter, and the inlet of upper filter is connected with wastewater input pipeline, and the bottom center of treatment jar is equipped with water outlet, and the bottom of water outlet is fixed with lower filter, and the outlet of lower filter is connected with liquid phase output pipeline, and liquid phase output pipeline is equipped with circulation branch, and the circulation branch end is equipped with circulating pump, and the outlet pipeline end of circulating pump is communicated with wastewater input pipeline. The device further strengthens acetylene removal effect, and has the effect of filtering impurities before the recycling of sodium hypochlorite.

This application discloses a control method, device, medium, and equipment for steam regulation in a propane stripper, comprising the following steps: Step S1: When the measured value of the side stream liquid level is ≥95.5% and the differential pressure on the tray is >35 kPa, the setting value of the steam flow regulating valve is lowered at intervals of 10 times / minute; Step S2: When the measured value of the side stream liquid level is <95% and the differential pressure on the tray is <48 kPa, the setting value of the steam flow regulating valve is raised at intervals of 10 times / minute; Step S3: The propylene reflux flow rate is measured using a flow detection device. When the propylene reflux flow rate is lower than 4100 kg / h, the steam feed rate is increased; Step S4: When the propylene reflux flow rate is higher than 4500 kg / h, the steam feed rate is reduced in multiple adjustments to maintain the propylene reflux flow rate at or above 5100 kg / h. After adopting this method, the top reflux flow rate of the propane stripper was stabilized at around 5100 kg / h, which solved the problem of intermittent and large fluctuations in the top reflux flow rate. After being put into use, the top output of the tower is sufficient and stable, and the side output level gauge is stable at 104%, ensuring the stable operation of the propylene recovery pump.

The application discloses a method for removing endotoxin from gelatin. The method comprises the following steps: (1) adding pyrogen-free water to gelatin raw materials, swelling, and then heating to 50-70 DEG C to prepare a gelatin solution with a mass concentration of 3-20%; (2) adding an adsorbent with a mass of 2.5%-100% of the gelatin, adsorbing at 40-70 DEG C for 30-240 min, and then separating the adsorbent from the gelatin solution by filtration or centrifugal separation to obtain a filtrate; (3) further filtering the filtrate by filter paper and thin-layer diatomite to obtain a refined filtrate, diluting the refined filtrate with 4 times the volume of water, ultrafiltering by using a membrane with a molecular weight cut-off of 5000-20000 Da, finally concentrating to a concentration of 10-25%, sterilizing, and drying to obtain gelatin solid with low endotoxin; the adsorbent used in step (2) is an adsorbent with a silica gel carrier, polyethylene imine as a ligand, and a spacer arm grafted or ungrafted, and the spacer arm is hexanediamine. The purified gelatin can be used in the preparation of blood plasma substitutes, tissue engineering scaffolds, implants and absorbable hemostatic materials.

This invention discloses a wastewater treatment agent for thallium-containing wastewater and its preparation method, belonging to the field of environmental engineering technology. It features a large specific surface area and porosity, abundant active sites, and a molecular sieve effect. In its spatial structure, the wastewater treatment agent has a gradient porous structure, with a large-pore inner layer, a small-pore outer layer, and a middle layer containing manganese dioxide sites with oxidizing properties. The difference in pore size between the inner and outer layers protects the internal oxidizing component, manganese dioxide, from interfering with the active sites due to byproducts. Furthermore, the gradient porous structure increases adsorption and improves thallium removal. The modified polystyrene microspheres in this invention contain sulfonic acid groups on their surface. After coordination interaction with manganese ions, they can bind to positively charged thallium ions through electrostatic attraction, achieving the adsorption and enrichment of thallium ions.

The invention discloses a method for removing chlorine in waste plastic pyrolytic oil by using alkali metal hydride, which comprises the following specific steps: S1, adding waste plastic pyrolytic oil into a reactor, then adding alkali metal hydride, and uniformly mixing the waste plastic pyrolytic oil and the alkali metal hydride to obtain a mixed solution; s2, heating the mixed solution to a reaction temperature, and carrying out a dechlorination reaction to obtain an intermediate solution; and S3, adding water into the intermediate solution, and extracting to remove sodium chloride to obtain the dechlorinated plastic oil. According to the method, organic chlorine in the waste plastic pyrolytic oil can be efficiently removed, total chlorine in the waste plastic pyrolytic oil can be removed, the yield of the waste plastic pyrolytic oil can be guaranteed, the dechlorinated waste plastic pyrolytic oil meets the subsequent processing requirements, and the corrosion problem is avoided.

This invention relates to a circulating methanol purification system and process. The system includes at least one distillation-hydrogenation loop, which comprises a methanol distillation column and a hydrogenation reactor connected in a loop. The feed inlet of the hydrogenation reactor is connected to the top outlet of the methanol distillation column, and the feed inlet of the hydrogenation reactor is connected to a hydrogen source. The process includes the following steps: passing an aqueous methanol solution containing impurities into the methanol distillation column, removing impurities such as aldehydes and ketones from the top of the column; removing the concentrated impurities through the hydrogenation reactor, and returning the hydrogenation product to the methanol distillation column for fusel oil separation; collecting high-purity methanol from the side stream of the methanol distillation column, further removing remaining trace impurities, especially aldehydes, through an ion exchanger; the purified methanol can be recycled. Using the purification process of this invention, impurities in the circulating methanol are concentrated, the process is simple with low investment, the impurity conversion rate is high, the service life of the epoxidation catalyst can be significantly extended, and product quality can be improved.

The invention belongs to the technical field of resource recovery, and particularly discloses a preparation method of a low-radioactivity lanthanum chloride solution, which comprises the following steps: (1) adding barium chloride and sulfuric acid into a lanthanum chloride feed liquid, then adding lanthanum oxide to adjust the pH value, and filtering after stirring; and (2) the obtained filtrate lanthanum chloride solution, a P507-kerosene extraction agent and a hydrochloric acid back extraction agent are added into an extraction separation tank according to the volume ratio of 1: (6-12): (0.4-1.2), multi-stage extraction, multi-stage washing and multi-stage back extraction are conducted, and back extraction liquid obtained after back extraction is the low-radioactivity lanthanum chloride solution obtained after radioactive elements are separated. The method has the characteristics of good radioactivity removal effect, low cost, high lanthanum recovery rate, convenience in operation, simple process, low equipment investment and high practicability.

The application relates to the technical field of plastic processing equipment, and discloses an environment-friendly plastic granulator for plastic processing, which comprises a bottom box, a treatment barrel for dehumidifying and processing recycled plastics is arranged at the top of the bottom box, a granulation main machine box is arranged on one side of the treatment barrel, and the recycled plastics after multiple treatments in the treatment barrel are subjected to granulation processing treatment; and a preliminary treatment mechanism is used for preliminarily dehumidifying and processing the recycled plastic raw materials after a cleaning process. By increasing and arranging an auxiliary treatment mechanism, the mechanism can not only replace the wet steam in the material pores by dry nitrogen during the pulse drying process, strengthen the removal effect of the internal pore water of thick-wall materials, and improve the defect that the outside is dry and the inside is wet in the traditional drying process, but also remove the combined water in the intermolecular gap of the melt by the nitrogen gas stripping effect during the melt granulation stage, further reduce the hydrolysis reaction probability in the melt state, and reduce the internal bubble defects of the melt.

The utility model relates to exhaust gas purification technical field especially, relates to a kind of industrial boiler tail gas fine particulate matter high-efficiency removal device.Its technical scheme includes: tail gas discharge pipe, the right end of tail gas discharge pipe is provided with cooling tank, the top of cooling tank is provided with water pump one, the drainage end of water pump one is provided with conveying pipe one, the bottom end of conveying pipe one is extended to the inside of cooling tank and is provided with conveying box one, the bottom surface of conveying box one is provided with multiple spray heads one, the right side of cooling tank is provided with connecting pipe.The utility model can carry out cooling, desulfurization and denitration to boiler tail gas conveyed to the inside of cooling tank by setting cooling tank to spray head one, can carry out cooling protection to removal device, prevent high-temperature damage to equipment, prolong service life, by setting solid-liquid separation tank to discharge pipe, solid particles can be filtered and discharged, to improve the removal effect of fine particulate matter, ensure environmental safety.

The utility model discloses a reaction system for CO catalytic oxidation of sintering flue gas. The reaction system comprises a desulfurizing tower, a GGH flue gas heat exchanger, a heating furnace and a CO catalytic oxidation reactor which are sequentially arranged along the flow direction of the sintering flue gas, a first input port, a first output port, a second input port and a second output port are formed in the GGH flue gas heat exchanger, the first input port is connected with an outlet of the desulfurizing tower, and the first output port is connected with an inlet of the heating furnace; the second input port is connected with the outlet of the CO catalytic oxidation reactor, and the second output port is connected with the flue gas discharge unit; the CO catalytic oxidation reactor comprises a reactor main body as well as a flue gas uniform distribution module, a denitration catalyst module and a CO catalyst module which are sequentially arranged in the reactor main body along the flow direction of flue gas. According to the utility model, the flue gas can be efficiently treated, the CO removal efficiency is greatly improved, and the environment-friendly requirement that the CO emission is lower than 2800mg / Nm < 3 > is met.

This invention discloses a method for reducing the fluoride content in copper concentrate using particle size classification and pulsed voltage. The process involves adding high-fluoride copper concentrate to a hydrocyclone for classification, obtaining low-fluoride settling liquid and high-fluoride overflow. The high-fluoride overflow enters the concentrate chamber of an electrolytic cell, where an intensifier is added. Anode liquid is added to the anode chamber, cathode liquid to the cathode chamber, and intermediate liquid to the intermediate chamber. A pulsed power supply is used to apply a DC electric field between the anode and cathode for defluorination. Under the influence of the electric field, negatively charged fluoride ions migrate towards the anode chamber via electromigration, while fluoride, as fluoride or other soluble ions, migrates towards the cathode chamber via electrodialysis, ultimately reducing the fluoride ion concentration in the high-fluoride overflow. After sedimentation and filtration, the defluorinated overflow and low-fluoride settling liquid yield low-fluoride copper concentrate. The advantages of this invention are that it avoids the loss of valuable metals caused by inhibitors inhibiting copper and gold during traditional flotation defluorination of copper concentrate, while also reducing the environmental impact of fluoride ions.

The objective of this invention is to provide a silicon-containing resist underlayer film forming composition for forming a resist underlayer film in a processing step such as a semiconductor substrate, which can be stripped not only by conventional dry etching methods but also by wet etching methods using solutions such as dilute hydrofluoric acid, buffered hydrofluoric acid, and alkaline solutions. Furthermore, it provides a photolithography resist underlayer film forming composition that exhibits excellent storage stability and leaves minimal residue during dry etching processes. The solution is a resist underlayer film forming composition comprising a hydrolyzed condensate of a hydrolyzable silane mixture, wherein the hydrolyzable silane mixture comprises a hydrolyzable silane as shown in formula (1) and an alkyltrialkoxysilane, and the content of the alkyltrialkoxysilane in the hydrolyzable silane mixture is 0 mol% or more and less than 40 mol% based on the total molar number of all hydrolyzable silanes contained in the hydrolyzable silane mixture. (In formula (1), R...) 1 "A group that bonds to a silicon atom" indicates an organogroup comprising at least one group or skeleton selected from succinic anhydride, vinyl, phenyl, and isocyanuric acid skeletons, R 2 For groups that bond with silicon atoms, each can independently represent a substituted alkyl group, etc., R 3 For groups or atoms bonded to silicon atoms, each can be represented independently as an alkoxy, aralkyloxy, acyloxy, or halogen atom, where 'a' represents 1, 'b' represents an integer from 0 to 2, and 4−(a+b) represents an integer from 1 to 3. 1 a R 2 b Si(R 3 ) 4‑(a+b) (1).

The invention relates to the technical field of zinc smelting, in particular to a method for removing elemental sulfur in smoke leachate. Comprising the following steps that copper sulfate is added into smoke dust leaching liquid or leaching slurry to form first mixed slurry, zinc powder is added into the first mixed slurry to form second mixed slurry, then the second mixed slurry reacts, and third mixed slurry with elemental sulfur removed is obtained; the pH value of the smoke leachate is 4.6-5.3, and the content of elemental sulfur in the smoke leachate is 2 g / L or below. According to the method, the copper sulfate and the zinc powder are added into the smoke leaching liquid or the leaching slurry, the elemental sulfur in the smoke leaching liquid or the leaching slurry is removed, and the effect of eliminating the elemental sulfur is achieved.

The utility model relates to composite fiber dyeing technical field, concretely is a kind of composite fiber dyeing device, including dyeing box, guide roller, down roller, extrusion mechanism and scraping mechanism;Dyeing box top is provided with support frame;Guide roller is set at the top of dyeing box, and the both ends of guide roller are rotatably connected with dyeing box by support plate;Down roller is provided with multiple, and down roller is set in dyeing box and is rotatably connected with dyeing box;Extrusion mechanism is set on dyeing box, and extrusion mechanism is set in support frame;Scraping mechanism is set on dyeing box, and one end of scraping mechanism is inlaid with driving roller.The utility model is provided with extrusion mechanism, driven roller is inlaid with spring force and cooperates with driving roller to clamp cloth, and the excess dye on cloth is extruded, the excess dye on cloth is extruded as far as possible without damaging cloth, and the working load of subsequent drying unit is effectively reduced.

The utility model discloses a waste lithium battery electrolyte removal device, which relates to the technical field of lithium battery electrolyte removal, and comprises a box body, support legs are connected onto the box body, a baffle plate for blocking electrolyte is arranged on the box body, a lithium battery piercing structure is arranged on the box body, and an electrolyte extrusion component is arranged on the lithium battery piercing structure. And an electrolyte discharge structure is arranged on the box body. According to the utility model, the electrolyte extrusion assembly is arranged on the lithium battery piercing structure, and the electrolyte extrusion assembly extrudes the pierced waste lithium battery, so that the electrolyte outflow speed is accelerated, the residual quantity of the electrolyte in the lithium battery is reduced, and the removal effect of the electrolyte of the waste lithium battery is improved; and a filter screen convenient to take out and a liquid receiving hopper convenient to move are arranged, so that the liquid outlet is convenient to clean.