24 results about "Dimethyl p-phthalate" patented technology

The invention relates to the technical field of fish meat source identification, in particular to a method for identifying different sources of fish meat by combining an electronic tongue with HS-SPME-GC / MS. The method comprises the following steps: obtaining a fish meat sample; performing taste detection on the fish meat sample by adopting an electronic tongue to obtain a taste detection result; after the fish meat sample is extracted, volatile odor substance detection is conducted through chromatography and mass spectrometry, volatile odor substances comprise one or more of dimethyl phthalate, nonanal, n-hexyl alcohol, naphthalene, octanol, 1-octylene-3-alcohol and alpha-platylene, and a volatile odor substance detection result is obtained; and identifying the fish meat source in combination with the taste detection result and the volatile odor substance detection result. According to the method, an electronic tongue technology and a headspace solid phase microextraction-gas chromatography-mass spectrometry technology are combined for use, and the taste and the smell are detected at the same time so as to distinguish fish meat from different sources, so that a more reliable quality evaluation system can be established, accurate traceability and grading are supported, and different user requirements are met.

The invention relates to the technical field of beneficiation collecting agents, and discloses a flotation collecting agent for refractory copper oxide ore and a preparation method of the flotation collecting agent. The flotation collecting agent comprises, by mass, 59.3% of a chelating main agent, 19.76% of dimethyl phthalate, 15.81% of a pH response type segmented copolymer, 3.95% of 0 # light diesel oil, 0.24% of a quantum dot additive, 0.4% of shell source polypeptide, 0.08% of a magnetic recycling agent, 1.19% of an emulsion stabilizer, 0.04% of a calcium ion activating agent, 0.4% of tetrabutylammonium bromide and 23.73% of deionized water. Wherein the total mass percentage of other components except the deionized water is 100%, and the deionized water is independently added into the solid formula as a solvent to form the flotation collecting agent for the refractory copper oxide ore. According to the flotation collecting agent for the refractory copper oxide ore and the preparation method of the flotation collecting agent, through the design of multi-active-group collaboration, an intelligent carrier and the like, the flotation efficiency and selectivity of the refractory copper oxide ore are improved, prevulcanization is not needed, agent recovery and environmental protection are achieved, and a new scheme is provided for complex ore development.

The invention relates to a UiO-66 / g-C3N4 / SA photocatalyst for repairing dimethyl phthalate micro-polluted sewage, which is characterized in that the adsorption of dimethyl phthalate is improved through the large specific surface area of UiO-66 / g-C3N4 and abundant functional groups, and the in-situ degradation and mineralization capability of dimethyl phthalate under illumination is improved through a Z-type heterojunction structure of the UiO-66 / g-C3N4 / SA photocatalyst; for complex water bodies containing humic acid, Cl, Fe and the like and in water matrixes such as ultrapure water, tap water, well water and the like, UiO-66 / g-3N4 / SA shows a high removal rate on micro-polluted dimethyl phthalate, the highest removal rate on 0.1 mg / L dimethyl phthalate within 60 minutes can reach 93%, and the mineralization rate reaches 43%.

The invention discloses a hydrolase gene bitH, a protein coded by the hydrolase gene bitH and application of the hydrolase gene bitH. The full length of the hydrolase gene bitH is 654 bp, the sequence of the hydrolase gene bitH is shown as SEQ ID NO.1, the coded product hydrolase BitH contains 217 amino acids, and the sequence of the coded product hydrolase BitH is shown as SEQ ID NO.2. The BitH can be used for degrading phthalate compounds such as bis (2-hydroxyethyl) terephthalate (BHET), dimethyl isophthalate (DMI) and dimethyl phthalate (DMP). The hydrolase BitH can be used for degrading residues of BHET, DMI and DMP in water and soil, and has very important theoretical and application values.

The present application provides a BOG helium extraction method and system, and a MOF slurry absorbent and a preparation method thereof. The absorbent comprises 20-40wt% of a metal organic framework material and 60-80wt% of an organic solvent; the metal organic framework material comprises at least one of HKUST-1, CALF-20, ZIF-67 and ZIF-8; and the organic solvent comprises at least one of dimethyl phthalate, 1,3-dimethyl-2-imidazolinone, N-methyl pyrrolidone, sulfolane and methylcyclohexane. The BOG helium extraction method comprises: pretreating BOG raw gas to obtain He and N2 mixed gas; and under specific temperature and pressure conditions, contacting the He and N2 mixed gas with a volume ratio of 15-30:1 with the MOF slurry absorbent to obtain He. The technical scheme of the present application realizes efficient BOG absorption-adsorption separation and helium extraction under mild temperature and pressure conditions.

The invention provides a polyvinylidene fluoride-based composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: mixing graphene oxide and dimethyl phthalate, and carrying out a modification reaction to obtain a DMP-GO dispersion liquid; sequentially carrying out solid-liquid separation and drying treatment on the DMP (at) GO dispersion liquid to obtain a DMP (at) GO solid product; and preparing the polyvinylidene fluoride based composite material by taking the DMP (at) GO solid product and polyvinylidene fluoride as raw materials. The gas permeability coefficient of the prepared polyvinylidene fluoride-based composite material is remarkably reduced, and the polyvinylidene fluoride-based composite material has excellent gas barrier property and excellent mechanical property and can be well applied to a lining layer of a marine flexible pipe.

The present invention relates to an insulating film composition for a ceramic heater silicon carbide substrate and, more specifically, comprises: a first agent comprising 30-50 wt% of glass frit, 20-40 wt% of aluminum oxide, 1-5 wt% of ethyl cellulose and 20-30 wt% of 3-hydroxy-2,2,4-trimethylpentyl isobutyrate; and a second agent comprising 20-50 wt% of glass frit, 8-15 wt% of ethyl cellulose, 0.5-2 wt% of aluminum oxide, 40-65 wt% of 3-hydroxy-2,2,4-trimethylpentyl isobutyrate and 0.1-1 wt% of dimethyl phthalate. A wafer-sized SiC substrate having a thickness of 2t or less, excellent insulating properties and minimized warpage can be manufactured using the insulating film composition for a ceramic heater silicon carbide substrate, of the present invention, and can be applied to a thick-film heater, and thus can maximize the productivity of a product produced using the heater.

The invention relates to a hybridoma cell strain capable of secreting a diallyl phthalate monoclonal antibody and application of the hybridoma cell strain, and belongs to the technical field of immunodetection. The monoclonal antibody secreted by the hybridoma cell strain has excellent affinity and sensitivity to diallyl phthalate, IC50 of the monoclonal antibody to the diallyl phthalate reaches 500 ng / mL, and the monoclonal antibody secreted by the hybridoma cell strain has excellent affinity and sensitivity to structural analogues of the diallyl phthalate. The invention relates to a method for preparing diisononyl phthalate, which is characterized in that the diisononyl phthalate, such as dimethyl phthalate, diethyl phthalate, dinonyl phthalate, butyl benzyl phthalate, diisobutyl phthalate, di (2-ethylhexyl) phthalate and diisononyl phthalate, are not subjected to cross reaction. Therefore, the monoclonal antibody provided by the invention can be used for preparing an immunodetection product of diallyl phthalate, and an efficient detection method and means are provided for residue detection of diallyl phthalate in food.

The invention discloses a synthetic process and application of a luminol monosodium salt precursor for a chemiluminescent substrate solution, and belongs to the technical field of physical and chemical detection. The method comprises the following steps: by taking dimethyl 3-aminophthalate as an initial raw material, crystallizing and purifying, reacting with acetyl chloride to generate dimethyl 3-acetamido phthalate, and further purifying through column chromatography separation and recrystallization to obtain high-purity dimethyl 3-acetamido phthalate. The product reacts with hydrazine hydrate to generate N-acylated luminol, and the compound has long-term storage stability as a precursor of luminol monosodium salt. According to the present invention, the precursor is hydrolyzed under the alkaline condition, the pH value is adjusted, the crystallization is performed in ethanol, the high-purity luminol monosodium salt or the aqueous solution thereof is finally prepared, and the chemiluminescence immunoassay results of the obtained product are superior to the national standard.

The application discloses a bimetallic catalyst for preparing o-phthalaldehyde by dimethyl phthalate hydrogenation and a preparation method thereof, and belongs to the field of catalyst preparation and application. The Ni-Fe / Al2O3-ZrO2 catalyst loaded with nickel and iron bimetal is prepared by taking alumina and zirconium dioxide as carriers, wherein n(Ni):n(Fe):n(Al):n(Zr) = 0.1:0.05:2:1. The Ni-Fe / Al2O3-ZrO2 catalyst is prepared by first preparing a Ni-Fe / Al2O3-ZrO2 catalyst precursor and then carrying out a reduction reaction in a hydrogen atmosphere. The Ni-Fe / Al2O3-ZrO2 catalyst of the application will not be deactivated due to carbon deposition and metal sintering in the high-temperature hydrogenation process, prolongs the service life of the catalyst, promotes the reaction of preparing o-phthalaldehyde by dimethyl phthalate hydrogenation, and has great competitive advantages.

The invention discloses a synthetic vehicle wood alcohol gasoline for various grades of national standard and a preparation method thereof. The synthetic vehicle wood alcohol gasoline for various grades of national standard is characterized by comprising the following components in percentage by weight: 10.0-70.0% of wood alcohol, 20.0-75.0% of naphtha, 26.0-80.0% of gasoline, 0.5-3.5% of an additive, 0.1-5.0% of an anti-corrosion anti-gelling agent and 0.1-10.0% of a combustion accelerator. The additive is prepared from the following components in percentage by weight: 1.0 to 20.0 percent of acetone, 8.0 to 30.0 percent of n-butyl alcohol, 17.0 to 45.0 percent of methyl tertiary butyl ether, 7.0 to 20.0 percent of S-80 and 10.0 to 35.0 percent of trimeric linoleic acid; the anti-corrosion and anti-gum agent is prepared from the following components in percentage by weight: 10.0 to 80.0 percent of dimethyl phthalate, 3.0 to 50.0 percent of dipentene and 5.0 to 60.0 percent of benzotriazole; the combustion promoter is composed of the following components in percentage by weight: 5.0 to 40.0% of peroxide, 8.0 to 60.0% of toluene, and 10.0 to 80.0% of xylene. The method is operated at normal temperature and normal pressure, the technological process is simple, raw materials are rich and easy to obtain, and the production cost is low. Other parts such as an engine of an existing automobile do not need to be modified or updated, the fire-mainly-striking performance is good, and starting is easy. The gasoline does not stratify during storage and use, has good stability and good combustion effect, and can be used for producing various national standard brands of vehicular lignan gasoline.

The invention provides a plasticizer dimethyl phthalate and a synthesis method thereof, and relates to the field of dimethyl phthalate. The synthesis method of the plasticizer dimethyl phthalate comprises the following steps: esterification, neutralization and impurity removal, and light component removal. The esterification comprises the following steps: adding phthalic anhydride, methanol and a solid acid catalyst into an esterification kettle, heating and esterifying under the protection of inert gas until the acid value of the material in the esterification kettle is less than 2mgKOH / g, and filtering and recovering the solid acid catalyst to obtain an esterified material. According to the plasticizer dimethyl phthalate and the synthetic method thereof disclosed by the invention, while the defects of the existing synthetic method of dimethyl phthalate are specifically overcome, the downstream application defects of the plasticizer dimethyl phthalate are overcome through the specific pH range of the plasticizer dimethyl phthalate, so that the specific downstream application requirements are met.

The invention discloses a slow-breaking slow-setting emulsification regenerant and a preparation method thereof, and relates to the technical field of emulsification regenerant preparation, in particular to a slow-breaking slow-setting emulsification regenerant which comprises base oil, a plasticizer, an anti-aging agent, an emulsifier and an additive, the base oil is rubber oil, the plasticizer is dimethyl phthalate, the anti-aging agent is an anti-aging agent, the emulsifier is an emulsifier, and the additive is an additive. The anti-aging agent is an oil soluble antioxidant. According to the slow-breaking and slow-setting emulsification regenerant and the preparation method thereof, the base oil, the plasticizer, the anti-aging agent, the emulsifier and the additive are selected as raw materials, the emulsification regenerant is prepared by virtue of an ultrasonic emulsifying machine, and the emulsification regenerant supplements a polymer obtained by decomposing asphalt, so that a stable net-shaped structure is re-formed in the emulsification regenerant; the low-temperature anti-cracking performance of the regenerated asphalt is improved, the molecular movement capability is reduced along with the reduction of the temperature, the molecular chain segment is confined, the molecular structure tends to be stable, and the low-temperature anti-cracking performance and the high-temperature anti-deformation performance of the regenerated asphalt are improved.

The invention relates to a double-sided flat velvet fabric with good comprehensive performance and a preparation process thereof, and belongs to the technical field of textiles. The problems that an existing fleece fabric is prone to static electricity and dust absorption, unstable in dyeing, poor in flatness, prone to deformation, poor in air permeability and the like are solved. The preparation process comprises the following steps: firstly, taking polyester filament yarns and composite yarns as connecting yarns, taking hydrophilic modified C-shaped hollow section polyester as terry yarns, and preparing gray fabric by adopting a double-sided knitting process; then treating the gray fabric with a pretreatment dye liquor, a dye liquor, dimethyl phthalate, peregal O, a chelating agent and a fuzzing agent in sequence to obtain a dyed gray fabric; and finally, drying, shaping, carding, shearing and shaping the dyed gray fabric to obtain the double-sided flat velvet fabric. The double-sided flat velvet fabric is good in heat retention property, fluffy, soft, high in wet permeability, breathable, smooth in hairiness, antistatic, not prone to pilling and deformation, and uniform and stable in dyeing.

The invention belongs to the technical field of biological genetic engineering, and particularly relates to a hydrolase Hyl507 sourced from genuwuella and used for degrading phthalate, a coding gene and application of the hydrolase Hyl507. The amino acid sequence of the hydrolase Hyl507 is as shown in SEQ ID NO. 1, and the nucleotide sequence of the coding gene of the hydrolase Hyl507 is as shown in SEQ ID NO. 2. The invention specifically discloses construction of the coding gene of the genuwuella-derived hydrolase Hyl507 and an escherichia coli expression vector carrying the gene. Meanwhile, the invention also discloses an application of the genuwuella source hydrolase Hyl507 in hydrolysis of dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diisobutyl phthalate and bis (2-ethylhexyl) phthalate. The invention further discloses an application of the genuwuella source hydrolase Hyl507 in hydrolysis of dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diisobutyl phthalate and bis (2-ethylhexyl) phthalate. The invention firstly provides the hydrolase Hyl507 which is sourced from the genuwuella and is used for efficiently catalyzing and degrading the phthalic acid ester and the coding gene of the hydrolase Hyl507.

The invention belongs to the technical field of detection and analysis, and discloses a method for determining dimethyl phthalate in a DMC catalyst by an HPLC (High Performance Liquid Chromatography) method. The method comprises the following steps: mixing a DMC catalyst to be detected with an ethylenediamine tetraacetic acid tetrasodium salt solution, performing ultrasonic treatment, extracting with ethyl acetate, and collecting extract liquor to prepare a sample solution to be detected; the method comprises the following steps: weighing a dimethyl phthalate standard substance, and dissolving in a solvent to prepare a standard working solution; performing chromatographic analysis on the standard working solution and the to-be-detected sample solution by adopting a liquid chromatograph to obtain a standard substance solution HPLC (High Performance Liquid Chromatography) chromatogram and a to-be-detected sample solution HPLC chromatogram, drawing a standard curve graph according to the standard substance solution HPLC chromatogram, and calculating the content of dimethyl phthalate in the to-be-detected sample solution. The method provided by the invention is simple to operate, good in accuracy, high in sensitivity and good in stability; and the analysis time is short, and the detection can be completed only in 8 minutes.

The invention discloses a microcapsule containing abamectin and fluopyram, a suspending agent and a preparation method and application of the microcapsule and the suspending agent, and belongs to the technical field of pesticide preparations. The invention provides a microcapsule containing abamectin and fluopyram. The microcapsule contains an active compound and a stabilizer, the active compound is prepared from abamectin and fluopyram; the stabilizing agent is prepared from dimethyl phthalate, acetyl tri-n-butyl citrate and dioctyl phthalate; the median particle size D50 of the microcapsule is 0.6 to 5.0 [mu] m, and the maximum particle size D90 of the microcapsule is 1.0 to 15.0 [mu] m; based on the micro-capsule, the invention also provides a micro-capsule suspending agent containing the micro-capsule containing abamectin and fluopyram and a preparation method of the micro-capsule suspending agent. The microcapsule suspending agent has the persistence of the active ingredients and the mobility of the microcapsules in soil during application, has a certain release amount near the depth of plant roots in the soil, and is expected to become a more effective compound pesticide preparation for preventing and treating plant root diseases.

The invention discloses a method for detecting the content of organic ligands in a Co-Zn double-metal cyanide catalyst, and belongs to the technical field of analytical chemistry. The detection method comprises the following steps: S1, sample pretreatment: treating a Co-Zn double-metal cyanide catalyst by using a chelating agent, dissolving the Co-Zn double-metal cyanide catalyst in an aqueous solution, and extracting a target analyte to obtain a sample to be detected; s2, preparing a standard solution: preparing a standard solution formed by mixing tert-butyl alcohol and dimethyl phthalate; and S3, sample determination: detecting to obtain chromatograms of the standard solution and the to-be-detected sample through gas chromatography, obtaining peak areas of the tert-butyl alcohol and the dimethyl phthalate, drawing a standard curve according to the corresponding peak areas and concentrations, and calculating to obtain the content of the tert-butyl alcohol and the dimethyl phthalate in the to-be-detected sample. The method disclosed by the invention is simple and convenient to operate, can realize rapid separation of the organic ligands, effectively avoids side reactions, enables detection results to be quicker, more accurate and more reliable, and is good in repeatability.

The invention relates to the technical field of sewage treatment, and particularly discloses a treatment method of high-salinity wastewater containing dimethyl phthalate pollutants. According to the method, a copper-nickel electrode is used as a cathode, a ruthenium oxide electrode is used as an anode, the mass ratio of copper to nickel in the copper-nickel electrode is (5: 5)-(9: 1), supporting electrolyte sulfate is added into the high-salinity wastewater to be treated, then disodium hydrogen phosphate is added, the pH of the high-salinity wastewater is adjusted to 8-8.5, a direct-current power source is additionally arranged, the current is 90-120 mA, and degradation of the dimethyl phthalate pollutants is completed. Hydrocracking of carbon-oxygen atom bonds can be realized through selective reduction of the copper-nickel electrode, so that the carbon-oxygen atom bonds are directly broken; the toxicity of pollutants is reduced while the dimethyl phthalate is degraded, hydroxyl radicals generated by the ruthenium oxide anode can attack parent compounds and the pollutants after bond breaking, the toxicity of the parent compounds and the pollutants is reduced, and the synergistic degradation and detoxification effects of the electrochemical cathode and anode are achieved.

The application discloses a coating for preventing sulfurization of an LED lamp bead and a coating process, and relates to the technical field of LED lamp beads. The coating for preventing sulfurization of the LED lamp bead comprises coating I and coating II; the coating II is encapsulating glue; the coating I is one of a top coating layer and a bottom coating layer; the top coating layer comprises a sulfur-proof layer; the sulfur-proof layer coating comprises 30-50 parts of polyurethane modified silicon resin, 2-4 parts of dimethyl phthalate, 1-2 parts of calcium carbonate, 1-3 parts of titanium oxide, 10-16 parts of glass fiber, 1-3 parts of an antioxidant, and 1-2 parts of an adhesion enhancer; the top coating layer further comprises a top coating transition layer; the top coating transition layer is phenyl vinyl silicon resin; the bottom coating layer comprises a sulfur-proof layer and a bottom coating adhesion layer; the bottom coating adhesion layer is epoxy group modified silicon resin. The coating process for preventing sulfurization of the LED lamp bead provided by the application comprises die bonding, wire bonding and coating processes, and the obtained LED lamp bead not only has strong sulfurization prevention performance, but also has good weather resistance.

The present disclosure provides a polyvinylidene fluoride-based composite material and a preparation method and application thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: mixing graphene oxide and dimethyl phthalate to perform a modification reaction, so as to obtain a DMP@GO dispersion liquid; performing solid-liquid separation and drying treatment on the DMP@GO dispersion liquid in sequence, so as to obtain a DMP@GO solid product; and using the DMP@GO solid product and polyvinylidene fluoride as raw materials to prepare a polyvinylidene fluoride-based composite material. The polyvinylidene fluoride-based composite material prepared by the present disclosure has a significantly reduced gas permeation coefficient, excellent gas barrier performance, and excellent mechanical properties, and can be well applied to the inner lining layer of a flexible pipe for marine use.

The invention relates to the technical field of fluorescent sensing materials, in particular to a preparation method and application of a tetracarboxylic acid organic ligand based on a benzothiadiazole functional group for preparing a metal organic framework. The invention discloses a tetracarboxylic acid organic ligand based on a benzothiadiazole functional group, namely 4, 4 '-(benzo [c] [1, 2, 5] thiadiazole-4, 7-diyl) diphthalic acid, and the molecular formula of the tetracarboxylic acid organic ligand is C22H12N2O8S. The preparation method of the ligand comprises the following steps: step one, preparing dimethyl 4-(4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaborane-diyl) phthalate; 2, 4, 4 '-(benzo [c] [1, 2, 5] thiadiazole-4, 7-diyl) dimethyl diphthalate is obtained, and 4, 4'-(benzo [c] [1, 2, 5] thiadiazole-4, 7-diyl) dimethyl diphthalate is obtained; and step 3, obtaining the 4, 4 '-(benzo [c] [1, 2, 5] thiadiazole-4, 7-diyl) diphthalic acid. The organic ligand prepared by the invention can realize selective recognition of amine compounds, so that the organic ligand has great application potential in the field of luminescence sensing, and a new direction is indicated for preparing a metal organic framework material of a tetracarboxylic acid organic ligand containing a benzothiadiazole functional group.

The present invention relates to a trypsin derived from Antarctic krill, its encoding gene and its application in degrading plasticizers, belonging to the field of enzymology. The amino acid sequence of the trypsin is shown in SEQ ID NO.1, and the amino acid sequence of the gene encoding the trypsin is shown in SEQ ID NO.2. The trypsin of the present invention can degrade plasticizers PAEs, and the plasticizers are dimethyl phthalate, diethyl phthalate, dipropyl phthalate and / or dibutyl phthalate, having very good application prospects.

The invention discloses a high-strength PET film for a composite current collector and a preparation method of the high-strength PET film, and relates to the technical field of PET films.The preparation method comprises the following steps that modified PET resin, an antioxidant and a lubricating agent are evenly mixed, melt extrusion, film casting and two-way stretching are conducted, and a base film is obtained; the base film is sequentially subjected to ion irradiation, oxidation treatment, RAFT polymerization, washing and drying, and the high-strength PET film is obtained. The modified PET resin is prepared by carrying out copolymerization on dimethyl phthalate, a diester compound, 1, 4-cyclohexanedimethanol, ethylene glycol and 9, 9-bis [4-(2-hydroxyethoxy) phenyl] fluorene; the diester compound is prepared by carrying out a reaction on dimethyl itaconate and trans-1, 4-diaminocyclohexane.