35results about How to "Promote degradation reaction" patented technology

The invention discloses a multi-degradable plastic film which comprises the following components in percentage by weight: 85-98.7% of a polymer substrate, 0.1-1% of nano-titanium dioxide, 0.1-1% of kaolin, 0.1-1% of ferric stearate and 1-2% of hydrophilic resin. A preparation method of the multi-degradable plastic film comprises the following steps: uniformly mixing polyolefin, nano-titanium dioxide, kaolin, ferric stearate and hydrophilic resin in percentage by mass, melting and pelleting, and performing blow molding by using a blow molding machine, thereby preparing the multi-degradable plastic film. The multi-degradable plastic film has the beneficial effects that firstly, the use property of a product is not affected, and the basic requirements of daily life, agriculture use and the like can be met; secondly, multi-degradation can be achieved by using light, heat and biological substances, and due to the added hydrophilic resin, the plastic film can easily absorb the moisture in the air and the soil, multi-degradation is accelerated, and complete degradation is achieved.

A device for treating organic waste gas by applying a photochemical technology comprises a high-strength security filter screen, a plasma reactor, a liquid mist humidifier, a catalytic reaction screen, an adsorption reaction screen, an ultraviolet lamp unit and an electric controller; the catalytic reaction screen and the adsorption reaction screen are subjected to the irradiation of the ultraviolet lamp unit; the organic waste gas is purified after being filtered by the high-strength filter screen, decomposed by the plasma reactor, humidified and cooled by the liquid mist humidifier, catalyzed by the catalytic reaction screen and adsorbed by the adsorption reaction screen; and the electric controller is connected to the plasma reactor and the ultraviolet lamp unit and used for controlling the starting and stopping of the plasma reactor and the ultraviolet lamp unit. The device for treating the organic waste gas by applying the photochemical technology can be used for efficiently treating industrial organic waste gas, does not produce secondary pollution residues and is lower in resource consumption and operation cost.

The invention discloses a method for degrading organic pollutants based on biochar, which comprises the following steps: regulating the pH value of the organic pollutants to 3-9, adding ferric iron salt, persulfate and biochar, stirring the components, and carrying out oxidative degradation treatment at room temperature for 0.5-5 hour. According to the method, the oxidation-reduction capacity of the charcoal is fully utilized, wherein electrons are provided for reducing variable-valence metal so as to activate persulfate, sulfate radicals, hydroxyl and superoxide anion free radicals are generated, and therefore efficient degradation of pollutants is achieved. The method has a good application prospect in in-situ chemical oxidation remediation of actual organic matter contaminated soil andunderground water.

The invention discloses an organic wastewater catalytic degradation and separation device and method. The device comprises a dilution mechanism, a catalytic degradation and separation mechanism, a first control module and a second control module. The diluting mechanism comprises a diluting box, a stirring mechanism and a stirring driving mechanism. The catalytic degradation separation mechanism comprises a base bracket, a separation chamber, a catalytic mechanism and an aeration mechanism. The separation chamber comprises an upper separation chamber and a middle catalytic degradation chamber and a recovery chamber, wherein a titanium dioxide particle catalyst is arranged in the recovery chamber, and a separation mechanism is arranged in the upper separation chamber. The method comprises the following steps: 1, diluting organic wastewater; 2, conveying the diluted organic wastewater; 3, adding a titanium dioxide particle catalyst; and 4, carrying out catalytic degradation and separationon the diluted organic wastewater. According to the invention, dilution of organic wastewater is realized, catalytic degradation is carried out on the diluted organic wastewater, the catalytic degradation efficiency is improved, and the titanium dioxide particle catalyst can be separated and recovered.

The invention discloses a heavy metal contaminated soil degradation harmless treatment method which comprises the following steps: S1, detecting and analyzing heavy metal contaminated soil, and determining the dosage of a heavy metal contaminated soil degradation repairing agent; S2, preparing the heavy metal contaminated soil degradation repairing agent; S3, leaching; S4, applying the heavy metal contaminated soil degradation repairing agent, and performing ploughing and mixing; S5, planting plants which are suitable for local growth and have enrichment capacity; and S6, detecting until the heavy metal content in the soil reaches the safety standard. Harmless treatment of the heavy metal contaminated soil is achieved, and the requirements of resource utilization, soil replacement and landfill are met; the technology application range is wide, and the method is suitable for remediation of various soils contaminated byheavy metals,including chromium, hexavalent chromium, lead, zinc, copper, chromium, nickel, mercury, arsenic and the like; the technical operation is simple and convenient, the repairing time is short, the capacity increase is less, secondary pollution is avoided, and the cost is lower; and the resource utilization of the polluted soil can be realized, and the repaired soil is suitable for various purposes.

The invention belongs to the technical field of chitosan preparation and relates to a method for degrading chitosan through microwave-enzyme method coupling. The method comprises the steps as follows: firstly, dissolving the high-molecular-weight chitosan in an acetic acid-sodium acetate buffer solution with the pH value in a range of 4-6, and fully mixing the chitosan and the buffer solution to prepare a chitosan solution; then adding an enzyme with the mass accounting for 0.5-3% of the mass of the chitosan into the prepared chitosan solution, pouring the chitosan solution into a reaction bottle after even mixing, then placing the reaction bottle into a microwave reactor, feeding a nitrogen gas into the reaction bottle, and controlling the temperature to be below 65 DEG C and the microwave power in a range of 100-1000 W to have a degradation reaction for 10-180 min; after the degradation reaction is finished, heating a microwave to 100 DEG C to inactivate the enzyme for 10-15 min; finally, adjusting the pH value of the reacted solution to be in a range of 7-8 with an alkaline solution, removing sediment through filtration, removing saline ions from an obtained filtrate with a dialysis method, and then freezing and drying the filtrate to prepare the low-molecular-weight chitosan. The method is simple to operate, easy to control, mild in condition and environment-friendly.

The invention relates to a wool-like polyester filament and a preparation method thereof. The preparation method comprises the steps: firstly, terephthalic acid, 1,4-butanediol, fluorinated diacid, hexanediol with tertiary butyl side groups, and 2,5,6,6-tetramethyl-2,5-heptanediol are evenly mixed, and then an esterification reaction and a polycondensation reaction are carried out successively toprepare modified polyester; then a modified polyester POY filament is prepared from modified polyester flux according to a POY process; and finally a modified polyester DTY filament is prepared from the modified polyester POY filament according to a DTY process, and then the wool-like polyester filament is obtained. According to a prepared product, when the temperature is 100 DEG C, the dye-uptakeis 90.32-93.27%, and the K / S value is 22.15-23.42; after the product is placed at temperature of 25 DEG C and the relative humidity of 65% for 60 months, the intrinsic viscosity of the product is lowered by 17-20%; and the preparation method is low in cost and simple in process, and the prepared product is excellent in dyeing property and high in natural degradation speed, and has great application prospects.

The present invention discloses semi-dry microwave treating process of preparing galactomanoligose. Galactomanoligose is prepared with galactomannan powder as material and through the steps of hydration, microwave treatment, water dissolving and neutralizing, membrane separating and drying. The process has short production period, high production efficiency, less pollution and low power consumption.

The invention relates to a flame-retardant polyester fiber and a preparation method thereof. The preparation method includes the step that modified polyester FDY yarn, namely the flame-retardant polyester fiber, is prepared from a modified polyester melt according to the FDY process. A preparation method of modified polyester comprises the step that terephthalic acid, ethylene glycol, 2-CEPPA, 2,5,6,6-tetramethyl-2,5-heptandiol and doped modified Bi2O3 powder are evenly mixed and subjected to an esterification reaction and a polycondensation reaction in sequence, wherein the structural formulaof 2,5,6,6-tetramethyl-2,5-heptandiol is shown in the description. The dye-uptake of the prepared product is 85.3-89.2% under the temperature condition of 120 DEG C, and the K / S value is 22.35-25.43;after the product is placed for 60 months under the condition that the temperature is 25 DEG C and the relative humidity is 65%, the characteristic viscosity of the product is reduced by 13-18%. Thepreparation method is low in cost and simple in process; the prepared product has excellent dyeing property and natural degradability.

A method for preparing chitosan oligosaccharides through semi-wet method microwave treatment relates to a production method of chitosan oligosaccharides. The method comprises the following steps: using chitosan gelatine powder as raw material to perform hydration and microwave treatment, dissolving in water, neutralizing, and performing membrane separation, drying and the like to prepare chitosan oligosaccharides. The method does not consume organic solvent, thus the problem of recycling solvent does not exist and the pollution is low; and as the volume of the reaction system is from 1 / 3 to 1 / 5 of that of the solution method, the production efficiency is obivously increased. The method adopts microwave treatment to promote the polysaccharide degradation reaction, thus the heating effect is greatly increased. The radiation thermal effect of microwave and the non-thermal effect of microwave are utilized to prepare the product. Meanwhile, microwave is an efficient and clean energy, thus the speed of the chemical reaction can be greatly increased. The method also adopts the membrane separation mean, thus the refining efficiency is high and the product quality is controllable.

The invention relates to the technical field of window screens, in particular to a preparation method of a window screen coating for air purification. The preparation method comprises steps as follows: (1) materials are prepared; (2) 3-ethyl-3-oxetanemethanol is dissolved in an organic solvent, an initiator, a titanium source, a zinc source and kaolin are added, the mixture is subjected to refluxat 50-60 DEG C for 5-10 h, a precipitator is added for precipitation, a precipitate is dried to the constant weight under the vacuum condition, the temperature is increased to 270-300 DEG C, a productis continuously calcined for 1-3 h, and modified hyperbranched polyether is obtained; (3) the modified hyperbranched polyether in the step (2) and colloidal graphite powder are mixed and dispersed insolvent type thermosetting resin, a diluent and a curing agent are matched, the mixture is stirred at a high speed for 15-20 min, and the window screen coating is obtained. The titanium source and the zinc source are introduced into the forming process of hyperbranched polyether and are converted into titanium oxide and zinc oxide in situ in molecular pore channels of the hyperbranched polyether,organic matters in adsorbed particulate pollutants are rapidly degraded, and air is rapidly purified.

The invention belongs to the technical field of chemistry, and particularly relates to a synthetic method of an azithromycin rearrangement impurity R. The method mainly comprises the steps that (3R,4R,5S,6R,9R,10S,11S,12R,13R,15R,Z)-12-[[3,4,6-trideoxy-3-(dimethylamino)-beta-D-wood-pyranose group]oxygen]-6-ethyl-4,5-dihydroxyl-10-[(2,6-dideoxy-3-C-methyl-a-L-nuclear-pyranose group)oxygen]-3,5,9,11,13,15-hexamethyl-7,16-dioxy-2-azabicyclo[11.2.1]cetane-1-alkene-8-ketone(compound III) is subjected to acidification rearrangement, and after refining is conducted, the rearrangement impurity R withthe purity being 99.5% or above is obtained. The synthesized high-purity azithromycin rearrangement impurity R serves as an impurity standard substance of finished production detection, locating and qualification on the impurity are enhanced conveniently, and quality control over azithromycin active pharmaceutical ingredient is improved.

The invention relates to the field of environmental protection, in particular to a combined treatment process for organophosphorus wastewater with high total phosphorus concentration. The method comprises the steps of: pretreatment, a first-stage chemical phosphorus removal process, a flocculation phosphorus removal process, an oxidation phosphorus removal process and a second-stage chemical phosphorus removal process. Firstly, under the alkaline condition, organic phosphorus is preliminarily converted into inorganic phosphorus salt, then magnesium salt is added, a precipitation reaction is carried out to remove part of phosphorus, and then the remaining organic phosphorus pollutants can be degraded and removed through a Fenton photocatalysis combined oxidation process. By adopting the process of Fenton treatment and photocatalytic oxidation in sequence, the chromaticity of the wastewater can be reduced by utilizing Fenton treatment, the light absorption efficiency of the catalyst in the subsequent photocatalytic process can be effectively improved, and a large number of active free radicals such as superoxide anions or hydroxyl free radicals generated by residual hydrogen peroxidein the Fenton oxidation process are fully utilized; therefore, the mineralization removal rate of photocatalytic treatment of organic wastewater is further improved.

The invention belongs to the technical field of chemistry, and particularly relates to a synthesis method for azithromycin rearrangement impurity lactam. The synthesis method comprises the main step that (3R,4R,5S,6R,9R,10S,11S,12R,13R,15R,Z)-12-[[3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyl]oxy]-6-ethyl-4,5-dihydroxy-10-[(2,6-dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-3,5,9,11,13,15-hexamethyl-7,16-dioxa-2-azabicyclo[11.2.1]hexadec-1-en-8-one (a compound II ) is subjected to acidification and alkalization rearrangement and then is refined so as to obtain the rearrangement impurity lactam with the purity of 99.5% or above. The synthesized high-purity azithromycin rearrangement impurity lactam serves as an impurity standard substance for finished product detection, so that positioning and nature determining on impurities is facilitated, and the quality control over azithromycin crude drugs is improved.

The invention discloses and relates to a preparation method of an inorganic biodegradable adhesive tape. The prepared adhesive tape is good in air permeability, has a good antibacterial effect, is degradable, is high in strength, can be used for replacing a traditional disposable plastic adhesive tape, and reduces pollution.

The invention particularly relates to a DMAC (dimethylacetamide) containing high-concentration organic wastewater pretreatment device, which comprises an acid preparation region, a degradation agent chemical adding region, a degradation reaction region, an alkaline regulating region and a discharging region, wherein the acid preparation region comprises a preparation pool and a chemical distribution pipe; the chemical distribution pipe is positioned in the preparation pool and is used for adding acid liquid for reducing the pH value of wastewater; the degradation agent chemical adding region comprises a mixing pool, a pH detecting meter and a chemical distribution pipe, the pH detecting meter is positioned in the mixing pool; the chemical distribution pipe is positioned in the mixing pooland is used for adding degradation agents; the degradation reaction region comprises a reaction pool and an aeration system which is positioned at the bottom of the inner side of the reaction pool; the alkaline regulating region comprises a middle pool and a chemical distribution pipe which is positioned in the middle pool and is used for adding alkali liquid for increasing the pH value of wastewater; the discharging region comprises a discharging pool and another pH detecting meter positioned in the discharging pool. The acid preparation region, the degradation agent chemical adding region, the degradation reaction region, the alkaline regulating region and the discharging region are in sequential arrangement. The high-concentration organic wastewater pretreatment device has the advantages that the operation is simple; the practicability is high; the treatment effect is good; the high-concentration organic wastewater pretreatment device is particularly applicable to DMAC containing high-concentration organic wastewater pretreatment.

The invention relates to an anti-HBV replication targeting fusion protein and a construction method thereof. Utilizing the characteristic that the C-terminal region (CTD) of the hepatitis B virus core protein HBc can specifically bind to HBV cccDNA, this peptide is used as a guide molecule targeting cccDNA, which is denoted as HBc144; A3A‑HBc144 coding gene sequence and HBc144 were synthesized ‑UNG2 coding gene sequence, and clone these two segments into the multiple cloning sites MCS1 and MCS2 of the eukaryotic expression vector pVITRO2‑neo‑mcs to construct a recombinant double expression vector Pvitro2‑A3A‑HBc / HBc‑UNG2, The recombinant vector can simultaneously express two fusion proteins in hepatocytes, that is, A3A-HBc144 and HBc144-UNG2. The present invention realizes the targeting of A3A and UNG2 to HBV cccDNA, which is more effective than the vector expressing A3A or A3A-HBc alone. Strong inhibitory effect on virus replication.