22 results about "P-acetaminophenol" patented technology

The invention relates to polyarylester containing a furandicarboxylic acid unit and a preparation method thereof, and the polyarylester is prepared by the following steps: carrying out melt polycondensation on several monomers such as p-hydroxybenzoic acid, biphenol, terephthalic acid, 2, 5-furandicarboxylic acid and acetaminophen to prepare a prepolymer; and carrying out solid-phase polycondensation reaction on the prepolymer in a rotary kiln under a nitrogen protection condition. The furan-dicarboxylic acid is used as a bio-based product, is a green and renewable substitute of terephthalic acid / isophthalic acid, and meets the green and environment-friendly requirements in the future. The polyarylester obtained by the method can be subjected to melt processing at the temperature of 330-390 DEG C, and is engineering plastic with excellent mechanical properties.

The invention discloses a synthesis method and application of a peroxymonosulfate activated catalyst, and relates to the technical field of catalysts and the field of wastewater treatment. The composite material with negligible cation leaching, higher reusability and higher stability is obtained through a synthesis method, and the composite material has excellent activation performance in peroxymonosulfate (PMS), so that the degradation of paracetamol (acetaminophen) has remarkable catalytic activity. According to the preparation method disclosed by the invention, a proper amount of CoFe layered double hydroxide is mixed with melamine at a medium synthesis temperature, so that CoFe layered double oxide (CoFe LDO) on g-C3N4 is prepared, and an environmental pollution abatement compound with extremely high attraction is formed. According to the method, a new method of a free radical and electron transfer process coupling mechanism is created, the processes are synergistic, acetaminophen degradation can be promoted in the dark within 10 min, and an important reference value is provided for development of an efficient and stable PMS activated catalyst.

The utility model discloses an acetaminophen refined mother liquor recovery processing device which comprises a rack, a barrel shell is installed in the rack, filter screens are arranged in the barrel shell at intervals, the filter screens are clamped in a screen ring, a protruding tongue of the screen ring is rotationally connected to the barrel shell through a hinged support, an arc groove is formed in the side wall of one side of the barrel shell in a penetrating mode, and an arc plate is arranged on the outer side of the arc groove. The arc plate is connected to the outer curved surface of the net ring through an arc pad, the arc pad is clamped in the arc groove, a pressing rod mechanism is arranged on the outer side of the arc plate, and a seat plate of the pressing rod mechanism is connected to the outer wall of the barrel shell; the device is simple in structure, reasonable in design and novel and unique in thought, the adsorption layer is placed on the filter screen, the baffle ring limits the adsorption layer (particulate matter, a pad and the like), the adsorption layer adsorbs and filters mother liquor, the arc plate shields the arc groove in the barrel shell, and the arc pad on the inner side of the arc plate seals the arc groove, so that the mother liquor entering the barrel shell is prevented from leaking, and the service life of the mother liquor is prolonged. In addition, the arc plate is pressed and contacted through the pressing rod mechanism, so that the arc plate is prevented from accidentally driving the net ring and the filter net to rotate out.

The utility model relates to the technical field of centrifugal equipment, in particular to a centrifugal machine for separating acetaminophen mother liquor, which comprises a centrifugal machine body, the centrifugal machine body comprises an outer barrel and a centrifugal filter barrel, a cleaning mechanism is arranged at the upper end of the inner side of the outer barrel and comprises a second motor, and the lower end of the second motor is connected with a supporting shaft. Two first mounting holes which are vertically distributed are formed in the supporting shaft, a first supporting rod and a second supporting rod are arranged in the two first mounting holes in a penetrating mode correspondingly, and a first connecting block and a second connecting block are arranged at one end of the first supporting rod and one end of the second supporting rod correspondingly; the cleaning mechanism in the centrifugal machine can be suitable for cleaning various centrifugal filter barrels with different diameters and depths and outer barrels on the outer sides of the centrifugal filter barrels, the application range of the cleaning mechanism is widened, the utilization rate of the cleaning mechanism is increased, and the cleaning efficiency of the centrifugal machine is improved. The limitation of the cleaning mechanism is reduced.

This invention discloses a method for degrading acetaminophen in water using persulfate activated by an axially oxygen-coordinated iron single-atom catalyst. The method uses the axially oxygen-coordinated iron single-atom catalyst as an activator to activate persulfate and degrade acetaminophen in water. The axially oxygen-coordinated iron single-atom catalyst comprises a carbon substrate and iron single atoms, with the iron single atoms anchored in the carbon substrate in a Fe-N4O1 coordination structure. In this invention, the axially oxygen-coordinated iron single-atom catalyst is used to activate persulfate, which can efficiently activate persulfate and achieve highly efficient removal of acetaminophen from water. Complete removal of acetaminophen from water can be achieved within 2 minutes. This method has significant advantages such as simple process, easy operation, high treatment efficiency, good removal effect, wide applicability, and no risk of secondary pollution, demonstrating extremely high practical value and broad application prospects.

The invention relates to the technical field of material storage equipment, and discloses a closed raw material storage equipment for acetaminophen production, comprising: a drying conversion component, comprising a sealing cover, a protection frame, an activated carbon drying bag, a supporting spring, a ladder block, a dislocation component and a strong magnet, wherein the sealing cover is internally slidably connected to the protection frame, the inner wall of the protection frame is slidably connected to the activated carbon drying bag, the top of the activated carbon drying bag is elastically connected to the supporting spring, the top of the activated carbon drying bag is fixedly connected to the ladder block through a straight rod, a strong magnet is fixedly installed on the top of the protection frame, the gravity increases after the activated carbon drying bag absorbs moisture, so that the strong magnet is adsorbed on the limiting iron frame, the exhaust fan and dehumidification equipment in the warehouse are used to accelerate the drying of the protection frame, and the activated carbon drying bag is automatically ejected and dried after absorbing the set moisture, so as to avoid excessive moisture in the sealed tank, and no staff is required to check, so as to avoid the acetaminophen raw material from harming the human body, and the device is suitable for the storage of acetaminophen.

The utility model discloses a suction filter for acetaminophen production, which relates to the field of chemical equipment and comprises a suction filtration tank, a suction filtration pipe and a liquid outlet are arranged at the lower end of the suction filtration tank, a material receiving cylinder is arranged on the outer side of the upper end of the suction filtration tank, a discharging device is rotatably connected in the material receiving cylinder, and a radial driving device is arranged on the upper end face of the material receiving cylinder. A cleaning plate device is arranged on the driving device, a liquid collecting tank is fixedly connected in the suction filtration tank and comprises a liquid collecting cylinder, a liquid guide conical cylinder is fixedly connected to the lower end of the liquid collecting cylinder, a filtering device is arranged in the liquid collecting cylinder and comprises a filtering circular plate device and an air cylinder device, and the filtering circular plate device is in sliding sealing connection with the inner wall of the liquid collecting cylinder; the air cylinder device is fixedly installed on the liquid guiding conical barrel, the filtering circular plate device is connected with the air cylinder device through a telescopic rod, the air cylinder device drives the filtering circular plate device to move up and down on the inner wall of the liquid collecting tank through the telescopic rod, the device can automatically clean, discharge and collect filtered and separated medicine residue waste, and the working efficiency of the device is improved.

The invention discloses a persulfate advanced oxidation system, application of the persulfate advanced oxidation system in degradation of acetaminophen and an application method of the persulfate advanced oxidation system. The persulfate advanced oxidation system comprises P-Fe and V2-MXene and PMS. Treating a to-be-treated object containing acetaminophen by adopting a system; the method comprises the following steps: adding the P-Fe and V2-MXene into the p-acetaminophen-containing wastewater, and adding PMS (Polymethyl Sulfonate) for reaction. According to the method, P-Fe and V2-MXene is adopted as a catalyst to activate PMS, Fe and V2-MXene have a strong synergistic effect, PMS can be efficiently activated, metal leaching is reduced through surface phosphorization, secondary pollution is prevented, the method has efficient PMS activation capacity, low energy consumption, low cost and anti-interference capacity, metal leaching is well reduced through surface phosphorization, and the method has a great application prospect in practical application and is suitable for industrial production. The paracetamol can be degraded in a short time, and the treatment requirement of paracetamol-containing sewage is met.

The utility model discloses acetaminophen refined mother liquor recovery processing equipment, belongs to the technical field of acetaminophen, and aims to solve the problems that in the mother liquor recovery processing process, resin adsorbents are often adopted for adsorption processing, after adsorption is completed, the resin adsorbents need to be regenerated or replaced, and the cost is high. At present, the operation of taking out the resin adsorbent from equipment is complex, the resin adsorbent can be taken out only by disassembling a plurality of parts, the labor intensity of workers is increased, and later maintenance is not facilitated, the resin adsorbent recovery device comprises a recovery table, and the upper surface of the recovery table is provided with a recovery channel in the vertical direction; through the cooperation of the recovery table, the recovery channel, the connecting channel, the treatment table, the screen, the resin adsorbent and the handle, the mother liquor can be filtered, adsorbed and recovered, the resin adsorbent can be taken out quickly according to requirements, and the resin adsorbent can be replaced or regenerated, so that the convenience is high.

A method for producing acetaminophen, the method comprising causing p-nitrophenol to undergo an acetamination reaction to produce the acetaminophen, by passing a solution containing the p-nitrophenol through a column packed with a catalyst while also passing an acetylating agent and hydrogen through the column. The catalyst is a supported metal catalyst in which a metal element is supported on a monolith porous body, and a reaction temperature of the acetamination reaction is 0° C. to 60° C., and a reaction pressure of the acetamination reaction is 0.1 MPa to 1 MPa.

The utility model provides a crushing device for acetaminophen raw material production, and relates to the technical field of acetaminophen raw material production, the crushing device comprises a support and a shell, the upper surface of the shell is provided with a feed hopper, the lower surface of the shell is provided with a discharge port, and the interior of the shell is rotatably connected with a crushing roller A and a crushing roller B. The screening plate is arranged in the shell, raw materials obtained after preliminary smashing can be screened out, the raw materials which do not meet the smashing requirement are screened out, the motor B is started to drive the threaded rod to rotate, the threaded rod is in threaded connection with the moving block, and the moving block is in sliding connection with the sliding rod; the movable block can drive the crushing roller to horizontally move, then raw materials which do not meet the crushing requirement can be crushed again, workers do not need to manually take out the raw materials which are not completely crushed to manually add the raw materials for secondary crushing, manpower is saved, and meanwhile the crushing quality and the flexibility and crushing effect of the device are improved.

This invention discloses a method using a single-clinic phase W 18 O 49 A method for co-catalyzing Fenton degradation of acetaminophen in water, including the use of monoclinic W 18 O 49 A catalyst and a Fenton-like system are added to water containing acetaminophen to catalytically degrade the acetaminophen in the water. The Fenton-like system is composed of hydrogen peroxide and iron ions, where the iron ions are either ferric (Fe3+) or a mixture of ferric (Fe3+) and ferrous (Fe2+) ions. The monoclinic phase W... 18 O 49 The catalyst is prepared by heat treatment of a mixture of tungsten chloride and anhydrous ethanol. The method of this invention has advantages such as simple process, convenient operation, high processing efficiency, high oxidation activity, good reusability, and environmental friendliness.

The invention discloses a preparation method of a photocatalyst ZnxNi (1-x) Fe2O4 (at) BiOBr based on a semiconductor heterojunction and application of the photocatalyst ZnxNi (1-x) Fe2O4 (at) BiOBr in peroxymonosulfate (PMS) activation, and the photocatalyst ZnxNi (1-x) Fe2O4 (at) BiOBr is used for efficiently degrading organic pollutants in water, especially acetaminophen (PAM). The heterojunction photocatalyst is synthesized through a two-step hydrothermal method, and the cation composition, the microstructure and the heterojunction proportion of the heterojunction photocatalyst can be adjusted. The influence of different compositions and conditions on the PAM degradation effect is studied in detail, and the ratio of ZnxNi1-xFe2O4 to BiOBr is optimized, so that the optimal catalytic degradation effect is achieved. Under the optimal condition, the Zn0. 8Ni0. 2Fe2O4 (at) BiOBr photocatalyst can be used for completely removing PAM (Polyacrylamide) within 100 minutes, and the removal rate of 64% is also shown under the dark condition. In addition, the catalyst has good reusability, and still keeps efficient performance after five times of continuous treatment. According to the invention, a new understanding is provided for photo-assisted PMS activation in water environment pollution treatment, and an efficient and recyclable heterogeneous catalyst is provided for degradation of organic pollutants in water.

This invention discloses a micro-etching roughening solution, its preparation method, and its application, relating to the field of printed circuit board manufacturing technology. The micro-etching roughening solution comprises the following components: 60-100 g / L sulfuric acid, 30-50 g / L hydrogen peroxide, 5-40 g / L copper ions, 2-10 g / L photoresist, 1-5 g / L stabilizer, and the balance being deionized water. The photoresist is an aqueous solution prepared from 3-chloro-6-mercaptopyridazine, glutathione, and acetaminophen, with a mass ratio of 2:(1-3):(1-5). The photoresist used in this invention can form a uniform mesh-like chemical film on the copper surface. On the one hand, it can reduce the micro-etching rate of the copper surface; on the other hand, even with low micro-etching amount and shallow micro-etching depth, it can roughen the copper surface into a fine honeycomb structure, ensuring high adhesion between the copper surface and the film.

The invention relates to aromatic liquid crystal polyester resin, a preparation method thereof and a composite liquid crystal polymer material. The aromatic liquid crystal polyester resin is prepared from the following raw materials in parts by mole: 55 to 65 parts of p-hydroxybenzoic acid, 1 to 3 parts of 2-hydroxy-6-naphthoic acid, 14 to 16 parts of diphenol, 17 to 21 parts of phthalic acid and 3 to 5 parts of acetaminophen. The aromatic liquid crystal polyester resin has high mechanical strength, high fluidity, good toughness and high thermal deformation temperature, so that the aromatic liquid crystal polyester resin can be used for manufacturing precise electronic parts such as electronic connectors and the like, and can be well suitable for surface assembly technologies such as reflow soldering and the like.

The invention discloses a liquid crystal polyester composition, which comprises the following components by weight: 50-100 parts of liquid crystal polyester; 12-40 parts of filler; 0.1-3 parts of coupling agent; 0.2-0.6 parts of linear low-density polyethylene; 1-4 parts of polyarylate; wherein the filler is selected from fibrous filler and flaky filler, and the weight ratio of the fibrous filler and the flaky filler is (0.6-50): 1; the liquid crystal polyester is composed of at least two of terephthalic acid, biphenyl, 6-hydroxy-2-naphthoic acid, and p-hydroxybenzoic acid and acetaminophen as repeating units. The liquid crystal polyester composition of the invention can achieve a higher degree of enrichment of wear-resistant filler in the material resin skin layer through the compounding of fibrous filler and flaky filler and the compounding of linear low-density polyethylene and polyarylate, thereby significantly improving the wear resistance, and has excellent high temperature resistance and anti-foaming performance due to the good skin / core layer bonding.

The utility model discloses an efficient decolorizing kettle for acetaminophen production, which relates to the technical field of decolorizing devices and comprises a decolorizing outer cylinder, a decolorizing inner cylinder fixedly connected in the decolorizing outer cylinder, an upper cover fixedly connected to the upper end of the decolorizing inner cylinder, a feed port and a driving device arranged on the upper cover, and a stirring device rotatably connected to the center of the upper cover. The stirring device is located in the inner decolorizing barrel and is in transmission connection with the driving device, a filtering device is connected to the center of the lower end of the inner decolorizing barrel, an electromagnetic valve is arranged at the upper end of the filtering device, the filtering device comprises a filtering barrel, a cleaning and discharging device is slidably connected into the filtering barrel, and an air cylinder device is connected to the lower end of the cleaning and discharging device; the air cylinder device can drive the cleaning and discharging device to move up and down in the filter cylinder, filtering and discharging are efficiently and rapidly carried out, the filter cylinder is cleaned, the decolorizing kettle can be cleaned while stirring is carried out, filtering and discharging are efficiently and rapidly carried out, and the working efficiency of equipment is improved.

The invention discloses a Fe2Zn3S5-butadiene styrene rubber composite Fenton-like catalyst as well as a preparation method and application thereof, and belongs to the field of water treatment. The preparation method comprises the following steps: crushing a certain amount of styrene-butadiene rubber, uniformly dissolving the crushed styrene-butadiene rubber in dichloromethane, sequentially dissolving a certain amount of ferric acetylacetonate, pyridine, zinc chloride and anhydrous sodium sulfate in methanol, mixing the solutions, carrying out ultrasonic dispersion, drying by distillation, and carrying out temperature programming roasting carbonization under inert gas protection to obtain the Fe2Zn3S5-styrene-butadiene rubber composite Fenton-like catalyst. The prepared Fenton-like catalyst can quickly degrade acetaminophen in water by activating potassium hydrogen persulfate through surface-mediated electron transfer and singlet oxygen paths, and has the advantages of high catalytic efficiency, high oxidant utilization rate, low cost and favorable industrial benefits.

The invention discloses a preparation method of a zinc modified mesoporous Y type molecular sieve. The preparation method comprises the following steps: preparing a mesoporous NaY type molecular sieve by taking a Bola type surfactant [C5H5-N < + >-(CH2) 10-O-(p-C6H4) 2-O-(CH2) 10-N < + >-C5H5]. 2 [Br <->] as a template agent and matching with a specific raw material proportion; the NaY type molecular sieve is sequentially soaked in an ammonium salt solution and a zinc salt solution for ion exchange, and after drying and calcination, the zinc modified mesoporous Y type molecular sieve is obtained. The zinc-modified mesoporous Y-type molecular sieve prepared by the invention has larger specific surface area, higher pore volume and excellent conductivity, the detection range of the zinc-modified mesoporous Y-type molecular sieve applied to an electrochemical sensor for detecting the content of acetaminophen is 0.066-10000 [mu] mol / L, the detection limit can reach 0.01 [mu] mol / L, meanwhile, the zinc-modified mesoporous Y-type molecular sieve has excellent detection sensitivity, stability, reproducibility and selectivity, and the application prospect is wide. Accurate determination of acetaminophen in drugs can be achieved, and the prepared electrochemical sensor is simple in structure, convenient to operate and low in detection cost and has wide application prospects.

The invention relates to a visible-light-responsive quinoline bond-linked covalent organic framework photocatalyst, a preparation method thereof and application of the visible-light-responsive quinoline bond-linked covalent organic framework photocatalyst to degradation of organic pollutants in water. According to the photocatalyst, 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine, 2, 5-dibromo terephthalaldehyde and a styrene derivative are used as raw materials, a quinoline connection structure is constructed through a one-pot multi-component Bovlov reaction, and conversion from a dynamic imine bond to a stable quinoline unit is achieved. By introducing substituents with different electronic effects, the electronic polarity and the hydrophilic-hydrophobic property of the covalent organic framework are regulated and controlled, so that the photocatalytic performance of the covalent organic framework is optimized. The obtained hydrophilic CN-QN-COF has the degradation efficiency of more than 95% on 10 mg / L acetaminophen solution within 10 minutes under the irradiation of visible light, and has good repeatability and stability. The material disclosed by the invention is suitable for rapid photocatalytic purification of various organic pollutants in a water body, and has a good environmental application prospect.

The utility model provides a centrifugal machine for separating acetaminophen mother liquor, which relates to the technical field of centrifugal machines and comprises a barrel body, a top cover is mounted at the top end of the barrel body, a first motor is arranged at the top end of the top cover, and the output end of the first motor penetrates through the bottom end of the top cover and is fixedly provided with a support plate. After the filter frame and the filter plate rotate to separate the acetaminophen mother liquor, the connecting pipe is connected with an external water outlet device through the arrangement of a flange, after connection, an external water source is sprayed out through a high-pressure spray head through circulation of the connecting pipe and a communicating pipe, the filter frame and the filter plate are flushed, and after flushing, the acetaminophen mother liquor is separated through operation of a second motor, so that the acetaminophen mother liquor is separated. The connecting column is driven to rotate, so that the filter plate is driven to rotate, the filter plate is vertically placed in the filter frame, at the moment, washed solid particles can directly fall off, the effect of cleaning the filter frame and the filter plate is achieved, the filter plate and the filter frame do not need to be detached for cleaning, and the device is very convenient and higher in practicability.

The invention discloses a Fe2Zn3S5-styrene-butadiene rubber composite Fenton catalyst and its preparation method and application, belonging to the field of water treatment. The present invention first crushes a certain amount of styrene-butadiene rubber and uniformly dissolves it in dichloromethane, and also dissolves a certain amount of ferric acetylacetonate, pyridine, zinc chloride, and anhydrous sodium sulfate in methanol in sequence, mixes each solution and ultrasonically disperses it, and obtains a Fe2Zn3S5-styrene-butadiene rubber composite Fenton catalyst after evaporation and programmed temperature calcination and carbonization under inert gas protection. The Fenton-like catalyst prepared by the present invention can rapidly degrade acetaminophen in water by activating potassium persulfate, with surface-mediated electron transfer and singlet oxygen path, with high catalytic efficiency, high oxidant utilization rate, low cost, and good industrial benefits.