58 results about "Sulfanilic acid" patented technology

This invention relates to a method for preparing a p-aminobenzenesulfonic acid blended nanofiltration membrane and its application. The invention aims to address the technical problem that existing polymer thin films struggle to simultaneously increase permeate flux while improving retention rate. This invention provides a nanofiltration membrane with high efficiency in separating cobalt and lithium ions and significantly enhanced permeate flux. It achieves this by doping p-aminobenzenesulfonic acid during the preparation of traditional TFC nanofiltration membranes, efficiently introducing sulfonic acid groups to promote the formation of an ordered nanochannel structure in the polyamide network, thereby increasing water flux. Simultaneously, the negative charge carried by the sulfonic acid groups enhances the overall electronegativity of the membrane, making it more effective against Co ions. 2+ The electrostatic adsorption capacity is significantly higher than that of Li + This enables efficient separation of cobalt and lithium ions. The nanofiltration membrane material provided by this invention can be widely used in the resource-based treatment of acid leaching wastewater from lithium cobalt oxide batteries, achieving efficient separation and recovery of cobalt and lithium, and improving economic benefits and resource utilization.

The invention discloses a preparation process of a composite reactive dye, which comprises the following steps: mixing cyanuric chloride and meta-ester, pulping, carrying out primary condensation, adding 2, 4-diaminobenzene sodium sulfonate, carrying out secondary condensation, and carrying out diazotization to obtain a secondary condensed diazonium solution; the preparation method comprises the following steps: diazotizing p-aminobenzene sulfonic acid at low temperature, carrying out acidic coupling reaction on the diazotized p-aminobenzene sulfonic acid and H acid to obtain an acid coupling solution, adding N-ethyl-3-carbamoyl-4-methyl-6-hydroxy-2-pyridone dry powder, adjusting alkali, and dissolving; and adding a secondary diazonium solution into the dissolved clear solution, and carrying out alkaline coupling reaction to obtain an alkaline coupling solution, namely the composite reactive dye raw stock. According to the preparation process of the composite reactive dye, a compounding and color mixing procedure is omitted, the composite dye is synchronously prepared in a synthesis stage, and the primary pulp has the advantages of good solubility, high solid content, smooth material transmission, low spray drying energy consumption and the like; the product has good fastness, the proportion of yellow and blue can be adjusted in the synthesis stage, the color of the dye can be converted between light green and dark green, and the requirements of the downstream industry for various color matching of the product are met.

The invention belongs to the technical field of fluorescent probes, and particularly discloses a high-sensitivity visual Fe < 3 + > / Al < 3 + > fluorescent probe Rh and a preparation method and application thereof.The high-sensitivity visual Fe < 3 + > / Al < 3 + > fluorescent probe Rh is characterized in that cyanuric chloride and sulfanilic acid are used as raw materials, and an intermediate L1 is synthesized through an alkylation reaction; synthesizing an intermediate L2 by using the intermediate L1 and p-hydroxybenzaldehyde as raw materials through alkylation reaction; the intermediate L2 and rhodamine B hydrazide are subjected to a Schiff base reaction, and the triazine-rhodamine B hydrazide derivative fluorescent probe Rh is obtained. According to the fluorescent probe Rh prepared by the invention, the water solubility is increased due to the introduction of a sulfanilic acid group; the fluorescence spectrum test of the probe Rh and 17 common metal ions shows that the probe Rh has a remarkable fluorescence enhancement effect on Fe < 3 + > and Al < 3 + >; an ultraviolet-visible absorption curve test shows that a new peak appears at 560 nm, the absorbance is remarkably increased, and at 350 nm, Fe < 3 + > has an obvious absorption peak but Al < 3 + > does not exist, and Fe < 3 + > and Al < 3 + > can be distinguished.

The invention relates to the field of anti-aging agents DTPD, and particularly discloses a preparation method of the anti-aging agent DTPD. The preparation method of the anti-aging agent DTPD comprises the following steps: mixing aniline and o-toluidine, stirring, heating to 50-60 DEG C, adding hydroquinone and a catalyst, carrying out condensation reaction at 100-250 DEG C, removing evaporated water in the reaction process, and stopping the reaction until water cannot be evaporated; cooling to 100-140 DEG C, filtering while the mixture is hot, and distilling to remove impurities, so as to obtain the anti-aging agent DTPD; the catalyst is selected from one or more of benzene sulfonic acid, benzene disulfonic acid, p-toluenesulfonic acid, p-aminobenzene sulfonic acid, aniline trisulfonic acid and sulfonated halloysite. The preparation method disclosed by the invention has the advantages of high content of effective components in the product, simplicity and convenience in operation and safety.

The invention belongs to the technical field of high polymer chemistry and composite materials, and particularly relates to a composite proton exchange membrane and a preparation method thereof. The method comprises the following steps: adding an original multi-walled carbon nanotube into a mixed acid solution, and carrying out oxidation treatment to obtain an acidified carbon nanotube; carrying out condensation reaction on the acidified carbon nanotube, a condensing agent and sulfanilic acid in a solvent system to obtain a sulfonated carbon nanotube; dispersing the sulfonated carbon nanotubes in an acetic acid solution to form a dispersion liquid, dissolving chitosan in the acetic acid solution to form a chitosan solution, and mixing the dispersion liquid with the chitosan solution to prepare a membrane casting solution; forming a membrane from the membrane casting solution to obtain an initial composite proton exchange membrane; and placing the initial composite proton exchange membrane in a sulfuric acid solution for crosslinking treatment, washing and drying to obtain the target composite proton exchange membrane. Based on the method, the technical effect of preparing the proton exchange membrane with excellent comprehensive performance is achieved.

The invention discloses a limestone-gypsum wet flue gas desulfurization composite synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The limestone-gypsum wet flue gas desulfurization composite synergist is prepared from the following raw materials in parts by weight: 15 to 18 parts of organic acid, 5 to 8 parts of oxidation catalyst, 8 to 10 parts of sodium salt, 5 to 10 parts of magnesium salt, 12 to 15 parts of surfactant, 5 to 8 parts of organic acid alkali metal salt and 4 to 5 parts of dispersing agent. The preparation method comprises the following steps: reacting 2-dodecene-1-yl succinic anhydride with N, N-dimethyl ethylenediamine to generate a monoamide compound, reacting the monoamide compound with epoxy chloropropane to generate a quaternary ammonium salt compound, and reacting the quaternary ammonium salt compound with sodium sulfanilate to generate the surfactant. The limestone-gypsum wet flue gas desulfurization composite synergist prepared by the invention can promote dissolution of calcium carbonate, and shows good desulfurization efficiency.

The invention discloses an amphiphilic carbon-based nano oil displacement agent with a high emulsification level and a preparation method thereof, and belongs to the technical field of emulsification. The carbon-based quantum dots are synthesized by taking various small molecule compounds as raw materials through one-step hydrothermal synthesis, and then functional groups such as hydroxyl and carboxyl of the carbon-based quantum dot material are subjected to post-modification by using alkylamine, sulfanilic diazonium salt and the like, so that the hydrophilic and hydrophobic properties of the carbon-based quantum dot material are directionally regulated and controlled; therefore, the amphiphilic carbon-based nano oil displacement agent with good surface activity is prepared. The method has general adaptability to most of carbon-based quantum dot materials, and the prepared carbon-based nano oil displacement agent shows good interface performance and emulsifying performance as a surfactant. Various prepared carbon-based nano oil displacement agents show good interfacial activity and excellent emulsifying performance, and a water-oil two-phase emulsion system prepared from the carbon-based nano oil displacement agents prepared by the method is dense in emulsion, small in emulsion bubble particle size and very excellent in stability.

The impurity removal and crystallization device comprises a catalyst settling kettle, one side of the catalyst settling kettle is provided with a crude product feed port, the top of the catalyst settling kettle is provided with a hydrogen feed port, the bottom of the catalyst settling kettle is provided with a catalyst recovery discharge port, and the catalyst recovery discharge port is provided with an impurity removal and crystallization device. One side, far away from the crude product feeding hole, of the catalyst settling kettle is provided with a first purified liquid discharging hole, one end, far away from the catalyst settling kettle, of the first purified liquid discharging hole is communicated with a first membrane filtering kettle, and the outer wall of the first membrane filtering kettle is provided with a first solid isolate discharging hole; a second purified liquid discharge hole is formed in the outer wall of the first membrane filtration kettle. The utility model relates to the technical field of chemical product production, and solves the problems that in the prior art, when impurity removal and crystallization are carried out on a p-aminobenzene sulfonic acid crude product, the crude product is not effectively decolorized, so that the color of a recrystallized product is not pure enough, and the appearance quality and the market acceptability of the product are influenced.

The invention belongs to the field of tanning agents, and particularly relates to a preparation method of a synthetic tanning agent. The preparation method provided by the invention comprises the following steps: a) mixing p-hydroxybenzene carboxylic acid, p-aminobenzene sulfonic acid, urea and water, and then adding alkali metal hydroxide to adjust a mixed system to be transparent, so as to obtain a transparent solution; and b) mixing the transparent solution with formaldehyde to react, adjusting the pH value of the reaction system to be acidic after reacting for a period of time, and continuously reacting to obtain the synthetic tanning agent. According to the method, phenol is not directly or indirectly used in the preparation process of the synthetic tanning agent, and bisphenol can be prevented from being generated from the source.

The invention discloses a preparation method and application of a red light carbon dot material, and belongs to the technical field of composite material preparation and pH and heavy metal ion detection. The invention aims to solve the problems that the existing red light carbon quantum dot material cannot eliminate cross interference among metal ions and cannot realize selective detection of heavy metal ions under a strong acid condition. The method comprises the following steps: 1, sequentially adding 2, 3-diaminophenazine, sulfanilic acid and boric acid into ethanol, and then carrying out ultrasonic treatment and constant-temperature reaction; and 2, filtering, washing, dialyzing and freeze-drying. The method is applied to visual detection of pH and heavy metal ions. The invention is used for preparation and application of the red light carbon dot material.

The present invention discloses a nanoprobe and portable detection device for detecting propofol in serum, relating to the field of biomedical detection technology. The nanoprobe comprises UCNPs and a diazonium salt, wherein the diazonium salt is formed by the reaction of p-aminobenzenesulfonic acid and sodium nitrite. The nanoprobe uses the diazonium salt as a propofol recognition unit, and the UCNPs as an energy donor. In the presence of propofol, the nanoprobe can cause luminescence quenching. The rapid and specific response between the diazonium salt and propofol enables rapid, sensitive, and visual detection of propofol.

The utility model relates to a monitoring and adjusting device, in particular to a monitoring and adjusting device for a sulfanilic acid buffer solution in total alkali determination. The monitoring and adjusting device for the sulfanilic acid buffer solution in the total alkali determination comprises a sulfanilic acid buffer solution kit, a moving mechanism, a PH induction electrode and the like, the moving mechanism is arranged on one side of the sulfanilic acid buffer solution kit, the PH induction electrode is fixedly connected to the moving mechanism, and the PH induction electrode is fixedly connected to the other side of the sulfanilic acid buffer solution kit. The PH sensing electrode is positioned above the inner bottom of the aminobenzene sulfonic acid buffer solution kit by three to eight centimeters. According to the utility model, a signal is sent to the control panel through the PH sensing electrode, and then an acidic or alkaline solution is conveyed into the aminobenzene sulfonic acid buffer solution kit according to the PH value, so that the PH value of the aminobenzene sulfonic acid buffer solution is adjusted, and the influence of the abnormal PH value of the aminobenzene sulfonic acid buffer solution on a detection result is reduced.

The invention discloses a method for detecting nitrite in a metronidazole bulk drug. According to the method, an ultraviolet spectrophotometric method is adopted, diazotization with sulfanilamide is carried out, then color development with N-(1-naphthyl) ethylenediamine hydrochloride is carried out, and the content of nitrite is detected at the wavelength of 530-534 nm. According to the detection method, the content of nitrite in the metronidazole bulk drug can be rapidly and accurately detected, and the method is high in recovery rate and sensitivity and good in precision, repeatability and linearity.

The invention belongs to the technical field of green synthesis and sustainable chemical engineering, and discloses a synthesis method of a lignin carbon-based solid acid catalyst. The preparation method comprises the following steps: firstly, constructing a three-dimensional carbon skeleton structure system through interaction of sodium lignin sulfonate, ammonium sulfate and sodium sulfanilate in a water phase; a formed carbon skeleton structure is reserved through a freeze drying effect; then, putting the carbon-containing precursor into a tubular furnace, and carbonizing at a certain temperature; the lignin carbon-based material is obtained. And finally, putting the lignin carbon-based material into dilute sulphuric acid, stirring and soaking for a period of time to obtain the lignin carbon-based solid acid catalyst. The method is low in carbonization temperature, a carbon source is a by-product in pulping and papermaking industry, and raw materials are cheap and easily available; and the used sulfuric acid is low in concentration and small in dosage. And meanwhile, extra energy consumption is not generated in the room-temperature and normal-pressure environment, and the requirement of the dilute acid treatment process on equipment is greatly improved. Therefore, the method has a relatively high application value.

The invention relates to the field of fluorescent whitening, and discloses a fluorescent whitening composition and a preparation method and application thereof, the fluorescent whitening composition comprises the following components by weight: 30-45 parts of an acrylate emulsion, 5-12 parts of a fluorescent whitening agent, 1-5 parts of a modified additive, and 10-25 parts of deionized water; the fluorescent whitening agent is an aminated nano titanium dioxide grafted modified fluorescent parent, and the modified fluorescent parent is prepared by carrying out a first-step nucleophilic substitution reaction on cyanuric chloride and p-aminobenzene sulfonic acid and then carrying out a second-step nucleophilic substitution reaction on the obtained product and a fluorescent parent 4, 4-diaminostilbene-2, 2-disulfonic acid; according to the invention, the fluorescent whitening agent and the modified additive are added, so that the whiteness of the paper can be improved, the effect of inhibiting the yellowing of the paper is obvious, and the paper is not prone to yellowing. And the tensile strength, the tearability, the water resistance and the aging resistance of the paper can be effectively improved.

The invention discloses a preparation method of a beta-CD-SHGO / SCNF nano-channel membrane, and belongs to the technical field of membrane science. The preparation method comprises the following steps: preparing a graphene oxide aqueous dispersion and a p-aminobenzene sulfonic acid diazonium salt solution; reacting the two to obtain sulfonated graphene oxide, and etching by using concentrated nitric acid to obtain sulfonated porous graphene oxide; carrying out EDC and NHSS coupling reaction on the sulfonated porous graphene oxide to activate carboxyl, and adding amino cyclodextrin for modification to obtain cyclodextrin-sulfonated porous graphene oxide; cyclodextrin-sulfonated porous graphene oxide and sulfonated cellulose nanofibers are subjected to vacuum filtration for super-assembly to obtain the beta-CD-SHGO / SCNF nanochannel membrane, and the beta-CD-SHGO / SCNF nanochannel membrane is endowed with relatively high ion transmission performance and relatively good mechanical stability due to a compact two-dimensional lamellar structure and abundant membrane surface active sites; and a new construction strategy is provided for the two-dimensional bionic nano-channel membrane material.

The present invention provides a kit for detecting nitrate in water, a detection system, and related methods. A first aspect of the present invention provides a kit for detecting nitrate in water. The kit comprises a nitrate detection reagent. The nitrate detection reagent comprises the following component raw materials in parts by mass: 0.1-10.0 parts of a reducing agent, 0.5-50.0 parts of p-aminobenzene sulfonic acid, 0.1-20.0 parts of N-(1-naphthyl)ethylenediamine dihydrochloride, 1.0-60.0 parts of a masking agent, 10.0-90.0 parts of a weighting agent, and 0-10.0 parts of an accelerant. According to the present invention, the reagent in the kit discolors immediately upon contact with nitrate, without the need for any complex analysis device, thereby realizing low-cost, instant and trace detection of nitrate. The reagent allows for simple and convenient operation, high sensitivity, and low costs, thereby providing an effective technical means for the field of detection of nitrate ions in water. The detection reagent shows a low detection limit (visual detection limit of 0.1 mg / mL) and extremely high selectivity for nitrate, thereby guaranteeing that the present invention can be applied to detect nitrate in water.

The application relates to the field of water quality detection, in particular to a paper-based nitrate ion detection chip and a preparation method and application thereof. The paper-based nitrate ion detection chip comprises a bottom plate and a paper-based layer on the bottom plate; the paper-based layer comprises a color developing area, a reduction area and a sample inlet area which are sequentially communicated; a detection reagent is pre-fixed in the color developing area, the detection reagent comprises glucose, p-aminobenzenesulfonic acid, N-1-naphthyl ethylenediamine and ascorbic acid; a reduction reagent is pre-fixed in the reduction area, the reduction reagent comprises zinc powder and cadmium chloride; the detection reagent solution is added to the color developing area and then freeze-dried, so that the detection reagent is pre-fixed in the color developing area. The freeze-drying technology is used to uniformly pre-fix the detection reagent on the filter paper, a loose structure is formed, the color developing uniformity of the detection reagent after reacting with nitrate ions can be effectively improved, and the reaction time is reduced.

The application discloses preparation of silver nanocluster functionalized monolithic column and selective solid phase microextraction application thereof. The application takes urea and formaldehyde as matrix monomers, takes glutathione or p-aminobenzenesulfonic acid as functionalization-reaction catalysis bifunctional agent, and prepares glutathione functionalized monolithic column or p-aminobenzenesulfonic acid functionalized monolithic column through one-step polycondensation. Then, the multiple interactions between glutathione or p-aminobenzenesulfonic acid and silver ions are utilized to reduce and fix silver nanoclusters in situ on the surface of the monolithic column, so that the silver nanocluster functionalized monolithic column is prepared. The application provides a new way of combining cluster materials with monolithic columns, and the prepared monolithic column can be used as an in-tube solid phase microextraction stationary phase to realize online selective enrichment and high-sensitivity analysis of trace trans fatty acids in complex samples. The application has the advantages of ingenious process, simple operation, no need of expensive instruments, easiness in popularization and strong specificity of analysis objects.

The invention discloses a preparation method and application of a p-aminobenzene sulfonic acid blended nanofiltration membrane, and relates to a preparation method and application of a nanofiltration membrane. The invention aims to solve the technical problem that the existing polymer film is difficult to improve the permeation flux while improving the retention rate of the film. According to the nanofiltration membrane provided by the invention, cobalt and lithium ions are efficiently separated, the permeation flux is remarkably improved, p-aminobenzene sulfonic acid is doped in the preparation process of a traditional TFC nanofiltration membrane, and a sulfonic acid group is efficiently introduced to promote a polyamide network to form an ordered nano-channel structure, so that the water flux is improved. Meanwhile, the negative charges carried by the sulfonic acid group enhance the overall electronegativity of the membrane, so that the electrostatic adsorption capacity of the membrane to Co < 2 + > is obviously higher than that of Li < + >, thereby realizing efficient separation of cobalt and lithium ions. The nanofiltration membrane material provided by the invention can be widely applied to resourceful treatment of lithium cobalt oxide battery acid leaching wastewater, efficient separation and recovery of cobalt and lithium are realized, and the economic benefit and the resource utilization rate are improved.

The invention discloses preparation of a silver nano-cluster functionalized monolithic column and selective solid-phase microextraction application of the silver nano-cluster functionalized monolithic column. According to the invention, urea and formaldehyde are taken as matrix monomers, glutathione or sulfanilic acid is taken as a functionalization-reaction catalysis bifunctional agent, and a glutathione functionalized monolithic column or sulfanilic acid functionalized monolithic column is prepared by a one-step polycondensation method; and by utilizing multiple interaction between glutathione or p-aminobenzene sulfonic acid and silver ions, in-situ reduction is carried out on the surface of the monolithic column to generate and fix the silver nano-cluster, and the silver nano-cluster functionalized monolithic column is prepared. The invention provides a new way of combining a cluster material and the monolithic column, the prepared monolithic column can be used as an in-tube solid-phase microextraction stationary phase, and online selective enrichment and high-sensitivity analysis of trace trans-fatty acid in a complex sample are realized. The method is ingenious in process, simple and convenient to operate, free of expensive instruments, easy to popularize and high in analysis object specificity.

The invention discloses a nanoprobe for detecting propofol in serum and a portable detection device, and relates to the technical field of biomedical detection.The nanoprobe comprises UCNPs and diazonium salt, and the diazonium salt is formed by reaction of sulfanilic acid and sodium nitrite. According to the nanoprobe, the diazonium salt serves as a recognition unit of propofol, UCNPs serves as an energy donor, luminescence quenching can be caused in the presence of propofol, and rapid, sensitive and visual detection of propofol is achieved through rapid specific response between the diazonium salt and propofol.

The utility model discloses centrifugal dewatering equipment for sodium p-aminobenzene sulfonate, which comprises an outer tank, ground feet are mounted at the bottom of the outer tank, a tank cover is mounted above the outer tank, a feed hopper is arranged on one side of the tank cover, a drain pipe is arranged below one side of the outer tank, and a water outlet pipe is arranged below the other side of the outer tank. A first cover body is arranged on one side, far away from the drainage pipe, of the outer tank, and the centrifugal dewatering equipment for the sodium sulfanilate further comprises a centrifugal device which is mounted below the tank cover. The utility model relates to the technical field of sodium sulfanilate, in particular to centrifugal dewatering equipment for sodium sulfanilate, which can perform centrifugal dewatering in advance and then perform drying treatment through the matching of the outer tank, the centrifugal device, the feed hopper, the drying device, the first pore plate, the second pore plate and the torsion bar when liquid in sodium sulfanilate is too much, so that the sodium sulfanilate can be dried more conveniently. Furthermore, the drying efficiency can be greatly improved, and meanwhile, the input amount of energy can be reduced, so that the investment of economic cost is reduced.

This invention discloses a precursor of a monochlorotriazine halogen amine antibacterial agent for low-temperature, low-salt finishing, its preparation method, and a cotton fabric and finishing method thereof. The precursor incorporates a 5,5-dimethylhydantoin derivative group linked by a hydrophilic group of sodium p-benzenesulfonate and an ether bond, and is prepared by a temperature- and pH-controlled reaction of cyanuric chloride with sodium p-aminobenzenesulfonate and 3-(3-chloro-2-hydroxypropyl)-5,5-dimethylhydantoin. The cotton fabric finishing process involves precursor dissolution, neutral salt impregnation, low-temperature weak alkali grafting, and chlorination. The process includes impregnation at 25-40°C and alkali reaction at 15-35°C, with a neutral salt concentration of 20-60 g / L and an alkali concentration of 0.5-2 g / L. The precursor has excellent water solubility and fiber compatibility. The finishing process inhibits hydrolysis and reduces energy consumption. The treated cotton fabric has a kill rate of over 99.99% against Staphylococcus aureus and Escherichia coli within 1 minute. After 50 washes, the active chlorine recovery rate exceeds 80%. It has high strength retention, is energy-saving, environmentally friendly and easy to industrialize.

The invention discloses a nanoprobe for detecting 8-hydroxyquinoline without background interference and with high sensitivity and a preparation method of the nanoprobe, and relates to the technical field of analytical chemistry, the nanoprobe comprises up-conversion nanoparticles and diazonium salt, and the diazonium salt is formed by reaction of sulfanilic acid and sodium nitrite. According to the invention, diazonium salt is introduced as a specific recognition unit of 8-HQ, and green / red dual-wavelength emission characteristics of UCNPs are combined, so that a near-infrared excited ratio fluorescence detection system is constructed, environmental interference is effectively eliminated, and the misjudgment risk of single-signal detection is avoided; near-infrared light of 980 nm is adopted as exciting light, and the up-conversion luminescence characteristic of UCNPs is combined, so that ground background fluorescence interference in a complex matrix is avoided, and'background-free 'detection is realized.

The present invention discloses a flame-retardant, UV-resistant polyvinyl alcohol (PVA) composite film and a preparation method thereof. Based on the coordination interaction between ions and metal-ligands, the flame-retardant, UV-resistant agent DAD@Ni is prepared using 4,4-diaminodiphenyl sulfone, p-aminobenzenesulfonic acid, diethylenetriaminepenta(methylenephosphonic acid), and nickel nitrate. The flame-retardant, UV-resistant agent is added to a PVA system to produce a PVA composite film that is flame-retardant, UV-resistant, transparent, and has excellent mechanical properties. DAD@Ni exhibits a good flame-retardant effect in PVA. Furthermore, because 4,4-diaminodiphenyl sulfone and p-aminobenzenesulfonic acid contain a large number of aromatic rings, the conjugated system undergoes a π-to-π* conversion upon energy absorption, significantly enhancing the UV absorption capacity of the PVA composite film.

The invention discloses a flame-retardant anti-ultraviolet polyvinyl alcohol composite film and a preparation method thereof, based on the coordination interaction of ions and metal-ligands, a flame-retardant anti-ultraviolet agent DAD-Ni is prepared from 4, 4-diaminodiphenyl sulfone, sulfanilic acid, diethylenetriaminepenta (methylene phosphonic acid) and nickel nitrate. The flame-retardant anti-ultraviolet agent is added into a polyvinyl alcohol system, and the polyvinyl alcohol composite film which is flame-retardant, anti-ultraviolet, transparent and excellent in mechanical property is prepared. On one hand, DAD-coated Ni has a good flame-retardant effect in PVA; on the other hand, the 4, 4-diaminodiphenyl sulfone and the p-aminobenzene sulfonic acid contain a large number of aromatic rings, and a conjugated system is subjected to pi-pi * conversion after absorbing energy, so that the ultraviolet absorption capacity of the polyvinyl alcohol composite film is remarkably enhanced.

The invention discloses an energy-increasing, plug-removing, viscosity-reducing and discharge-assisting composite integrated agent for an oil layer and a preparation method and application thereof.The composite integrated agent comprises an agent A, an agent B, an agent C and an agent D. The agent A comprises urea, urease and sodium bicarbonate according to the mass ratio of (4.5-5.5): (0.8-1.2): (3.5-4.5); the agent B comprises the following components: p-aminobenzene sulfonic acid, ethylenediamine tetramethylenephosphonic acid and polydimethylsiloxane in a mass ratio of (8-10): (0.8-1): (1-1.2); the agent C comprises the following components: sodium dodecyl sulfate and diethylenetriamine, and the mass ratio of the sodium dodecyl sulfate to the diethylenetriamine is (0.8-1): (1.8-2.2); and the agent D comprises the following components: polyvinylpyrrolidone and lauryl sodium sulfate in a mass ratio of (1-1.2): (2-3). According to the invention, the reaction is carried out under the oil layer condition to form a high-pressure multi-phase foam system, a high-permeability layer is temporarily blocked and sealed, and potential tapping of a high-permeability layer and a low-permeability layer is carried out in sequence, so that the effects of various yield increasing measures of an oil well are improved.

The invention discloses a nitrous nitrogen removal phthalocyanine catalytic oxidation method and application, according to good water solubility and catalytic oxidation effect of ammonium sulfonate cobalt phthalocyanine, catalytic activated oxygen is used as an oxidant, and nitrous nitrogen in a water body is removed through oxidation. The method comprises the following three steps: (1) preparing a solution; preparing a catalyst solution with a certain concentration, a sodium nitrite solution, a p-aminobenzene sulfonic acid solution and a naphthyl ethylenediamine hydrochloride solution; and (2) nitrous nitrogen removal reaction. Mixing a certain amount of catalyst solution with a certain amount of sodium nitrite solution, and standing or magnetically stirring at room temperature to carry out nitrous nitrogen removal reaction; and (3) nitrite nitrogen removal analysis. Adding a certain amount of p-aminobenzene sulfonic acid into the nitrite nitrogen removal system, uniformly mixing and standing for 5 minutes; adding a certain amount of N-(1-naphthyl) ethylenediamine hydrochloride solution, adding water to a constant volume of 10mL, uniformly mixing, standing for 15 minutes, and measuring absorbance A at 538nm; according to the method, the catalyst solution is added after color development, the volume is fixed, and the absorbance A0 is measured. And calculating the nitrite nitrogen removal rate according to [(A0-A) / A0] * 100%.

This application relates to the field of adsorption materials, specifically disclosing a porous adsorption material and its preparation method; a porous adsorption material includes α-Al2O3, the surface of which is modified with an active liquid, wherein the active liquid is one of p-aminobenzenesulfonic acid solution, p-aminotoluene solution, and p-aminophenylacetic acid solution, and the mass ratio of α-Al2O3 to the active liquid is 1:(3-8); the α-Al2O3 is pre-modified with niobium pentachloride, including the following specific steps: mixing water, niobium pentachloride and α-Al2O3, stirring evenly and filtering, heating and drying to obtain modified α-Al2O3; this application uses the α-Al2O3 crystal form to provide a fast diffusion channel to improve the adsorption effect, and at the same time uses p-aminobenzenesulfonic acid solution, p-aminotoluene solution, and p-aminophenylacetic acid solution to modify α-Al2O3, introducing active molecules, providing strong chemical forces such as ion exchange and coordination bonds, promoting stronger adsorption and increasing capacity, thereby improving the adsorption capacity of the adsorption material.