240 results about "Dichlorobenzene" patented technology

The invention relates to a crown ether covalent organic framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a crown ether monomer and an amino monomer in an o-dichlorobenzene solvent, adding a catalyst acetic acid aqueous solution, and uniformly dispersing to form a reaction solution; the method comprises the following steps: freezing a reaction solution through a liquid nitrogen bath, vacuumizing, filling nitrogen, carrying out a heating reaction, and carrying out post-treatment operations such as washing and drying on a reaction product, so as to obtain the crown ether covalent organic framework material BADT-DB18C6-COF. The crown ether covalent organic framework material is formed by condensation of a crown ether aldehyde monomer and an amino monomer, the crown ether monomer is 4, 4 ', 4' ', 4 '''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde, and the crown ether monomer is 4, 4 ', 4' ', 4'''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde. The amino monomer is 4 ', 5'-bis (4-aminophenyl)-[1, 1 ': 2', 1 ''-terphenyl]-4, 4''-diamine. The crown ether covalent organic framework material BADT-DB18C6-COF prepared by the invention is mainly used as an adsorbent, is used for adsorbing and recovering uranium, thorium and americium ions from a solution, shows good adsorption capacity on radionuclides U-238, Th-232 and Am-243, and is particularly suitable for the field of spent fuel post-treatment in the nuclear industry.

The invention relates to the technical field of chemical automation control, and discloses an intelligent closed-loop control system for producing p-dichlorobenzene by a biomass method, which comprises a signal acquisition module, a residence time reconstruction module, a thermal coupling analysis module, a parameter self-adaptive scheduling module and an execution control module. The rheological characteristics of raw materials are monitored by collecting the current of a stirring motor, the liquid level is dynamically increased through a retention time reconstruction module to prolong the retention time of the materials, and a liquid level periodic migration strategy is introduced to prevent scaling of a gas-liquid interface; the thermal coupling analysis module and the parameter self-adaptive scheduling module are used for calculating thermal retardation post factors, temperature control parameters are corrected in real time, the upper limit of cooling output is limited, inner wall supercooling crystallization is prevented, and the problems that the conversion rate is reduced, the heat transfer efficiency is reduced and equipment is hung on the wall due to viscosity fluctuation of biomass raw materials are effectively solved. And the self-adaptive stable control of the reaction process is realized.

The invention discloses a reaction device based on dichlorobenzonitrile synthesis and a use method thereof, and relates to the field of reaction devices.According to the technical scheme, the reaction device comprises a reaction tank and a cover located at the top end of the reaction tank, a heating interlayer is arranged on the reaction tank, and a spiral conveying pipe surrounding a reaction cavity in the middle of the reaction tank is arranged in the heating interlayer; the heating medium is conveyed through the spiral conveying pipe, and the gap between the heating interlayer and the spiral conveying pipe is filled with the heat preservation material, so that the heating medium is conveyed around the reaction cavity in the heating interlayer through the spiral conveying pipe, and the spirally distributed conveying pipe can enable the heating medium to uniformly act on the outer wall of the reaction cavity; heat loss is reduced through the heat preservation material between the heating interlayer and the spiral conveying pipe, accurate control and uniform distribution of the reaction temperature are achieved, side reactions caused by local overheating are avoided, and therefore generation of polychlorinated impurities is reduced, and the purity of the dichlorobenzonitrile product is improved.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a method for constructing Si@COF-Co materials using porphyrin COF as a conductive nano-protective layer for nano-silicon and its application. The invention first adds a methanol solution of PEI to a methanol solution of nano-silicon, then dries it at high temperature to obtain PEI-modified nano-silicon Si-PEI. Next, Si-PEI and PVP are dispersed in o-dichlorobenzene / n-butanol, and then COF monomer and glacial acetic acid are added. After maintaining the mixture at 110-130℃ for 70-80 hours, it is washed, dried, and ground to obtain Si@COF. Finally, Si@COF and cobalt acetate tetrahydrate are dispersed in methanol, reacted at room temperature, and then washed, dried, and ground to obtain Si@COF-Co. This invention offers a simple, high-yield, and effective method. The synthesized material effectively alleviates the volume expansion of nano-silicon, improves the stability and reversibility of the electrode material, and can be used as a negative electrode material for lithium-ion batteries.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of N, N '-dichloro-1, 4-benzenedicarboxamide, which comprises the following steps: taking terephthalamide as an initial raw material and tert-butyl hypochlorite as a chlorination reagent; the method comprises the following steps: carrying out a chlorination reaction on terephthalamide and tert-butyl hypochlorite in a solvent under the protection of inert gas by controlling the reaction temperature, and after the reaction is finished, carrying out post-treatment to obtain N, N-dichloro-1, 4-phthalimide. The preparation method of the N, N '-dichloro-1, 4-benzenedicarboxamide comprises the following steps: taking terephthalamide and tert-butyl hypochlorite as raw materials, and carrying out one-step reaction to generate a dichloro product. Compared with a traditional N, N '-dichloro-1, 4-benzenedicarboxamide production method, the preparation method has the advantages that the amount of three wastes generated is small, the product yield is high, the product purity is high, the operation is safe and convenient, and the preparation method is more suitable for industrial application.

The invention belongs to the field of high polymer material synthesis, and provides a method for preparing polyphenylene sulfide from high-purity p-dichlorobenzene, which adopts the whole process design of pre-construction of a composite sulfur source intermediate, regulation and control of an end group controllable oligomerization polyphenylene sulfide intermediate, segmented polymerization of the high-purity p-dichlorobenzene and precise dehydration-washing-drying. The ultra-low impurity level of 0.05-0.25 wt% of burning residues of the polyphenylene sulfide product, the sodium ion content of 10-200 mg / kg and the chloride ion content of 10-500 mg / kg is achieved, and meanwhile the high-performance stability of the melting point of 270-300 DEG C, the gel fraction of 92-99 wt% and the water content of 0.01-0.20 wt% is kept. The problems of deep removal of inorganic ions and ash content, balance of gel fraction and processability and control of residual solvents in the traditional polyphenylene sulfide preparation process are solved, and the method has wide application value in the fields of high-performance engineering plastics, special fibers, electronic packaging materials and the like.

The invention discloses a composition for regulating scalp micro-ecology, which comprises a component A and a component B, the component A is prepared from the following components in parts by weight: 5 to 15 parts of amur corktree bark extract, 3 to 14 parts of rhizoma coptidis root extract, 5 to 15 parts of radix sophorae flavescentis extract, 2 to 8 parts of rhus chinensis insect gall extract, 2 to 18 parts of fructus cnidii extract, 3 to 10 parts of pericarpium zanthoxyli extract, 1 to 5 parts of camphor tree root extract, 3 to 12 parts of ginger root extract, 5 to 15 parts of radix polygoni multiflori extract and 5 to 25 parts of swertia japonica extract; 10-30 parts of a Chinese arborvitae twig and leaf extract; the component B is prepared from the following components in parts by weight: 70 to 90 parts of cocamidopropyl-PG-sodium dimethyl ammonium chloride phosphate, 10 to 30 parts of sodium isostearoyl lactylate and 1 to 10 parts of dichlorobenzyl alcohol; the weight ratio of the component A to the component B is 10: 1. The composition can effectively regulate scalp micro-ecological balance, remarkably inhibit overgrowth and reproduction of common harmful bacteria on scalp, protect or moderately promote growth of beneficial bacteria on scalp, maintain healthy flora structure and diversity, fundamentally improve scalp health by recovering and maintaining the balance state of scalp micro-ecology, and improve scalp quality. The shampoo has multiple good effects of controlling oil, preventing alopecia, relieving itching and removing dandruff.

The application relates to the technical field of chemical synthesis, in particular to a synthesis method of a key intermediate of pentconazole, which comprises the following steps: S1, Witting-Horner reaction of 2,4-dichlorobenzophenone and (diethoxy) phosphoethyl acetate under the action of a strong base to generate 3-(2,4-dichlorophenyl)-2-en-hexanoic acid ethyl ester; S2, Prilezhaev epoxidation reaction of 3-(2,4-dichlorophenyl)-2-en-hexanoic acid ethyl ester and meta-chloro peroxybenzoic acid to generate 3-(2,4-dichlorophenyl)-2,3-epoxy-hexanoic acid ethyl ester; and S3, base hydrolysis and acidification of 3-(2,4-dichlorophenyl)-2,3-epoxy-hexanoic acid ethyl ester to obtain a key intermediate 2-(2,4-dichlorophenyl) pentanal of pentconazole. The application has the effects of higher reaction yield, lower toxicity of reaction raw materials and more gentle reaction conditions.

This invention discloses a covalent organic framework for the separation of krypton and xenon gases and its preparation method. Using tetrahedral symmetric aldehyde ligands with four sites and amino ligands with different side group substitution sites as raw materials, o-dichlorobenzene and n-butanol as solvents, and glacial acetic acid as catalyst, a covalent organic framework compound with a 7-fold interpenetrating PTS topological network structure is synthesized through pre-ultrasonic treatment, high-temperature reaction process, and purification steps such as filtration and extraction. The synthesized covalent organic framework compound can selectively adsorb and separate xenon-krypton mixed gases.

The invention provides a method for preparing 3, 4-diaminobenzoic acid methyl ester, which comprises the following steps: preparing 3, 4-diaminobenzoic acid from 3, 4-dichlorobenzoic acid by using a metal catalyst and a ligand catalyst; and preparing methyl 3, 4-diaminobenzoate by using the 3, 4-diaminobenzoic acid. The method provided by the invention has the advantages of easily available raw materials, simple process route, no dangerous reaction, no use of expensive heavy metal catalysts, yield and product purity which are equivalent to or superior to those in the prior art, and easiness in large-scale production.

The present application relates to the technical fields of chemical engineering automation control, and discloses an intelligent closed-loop control system for producing p-dichlorobenzene by biomass method, which comprises a signal acquisition module, a residence time reconstruction module, a thermal coupling analysis module, a parameter self-adaptive scheduling module and an execution control module. The rheological characteristics of raw materials are monitored by acquiring the current of the stirring motor, the liquid level is dynamically increased by the residence time reconstruction module to prolong the residence time of materials, and the periodic migration strategy of the liquid level is introduced to prevent the gas-liquid interface from scaling. The thermal resistance lag factor is calculated by the thermal coupling analysis module and the parameter self-adaptive scheduling module, the temperature control parameters are corrected in real time, and the upper limit of the cooling output is limited to prevent the overcooling crystallization of the inner wall. The problems of the decrease of the conversion rate, the decrease of the heat transfer efficiency and the wall-hanging of the equipment caused by the viscosity fluctuation of the biomass raw materials are effectively solved, and the adaptive stable control of the reaction process is realized.

The application discloses a saline-alkali soil improvement method and belongs to the technical field of saline-alkali soil improvement. The method comprises the following steps: in a screw extruder, humic acid and acrylic acid are grafted and polymerized in a reaction section to form humic acid grafted acrylic acid polymer; N-[2-(2-methoxy-5-nitro-phenoxy)ethyl]pyridine, [2-(3,4-dichlorophenoxy)-ethyl]hexadecyl diethyl ammonium bromide and furfural residue are sequentially added at the opening of a conveying section, and after passing through a mixing section, the mixture is extruded and granulated to obtain a conditioner; according to weight parts, the furfural residue is 70-90 parts, the humic acid grafted acrylic acid polymer is 10-25 parts, and the N-[2-(2-methoxy-5-nitro-phenoxy)ethyl]pyridine and [2-(3,4-dichlorophenoxy)-ethyl]hexadecyl diethyl ammonium bromide are 1-5 parts. The conditioner is applied to saline-alkali soil by being scattered in the soil during ploughing or being applied to the soil by hole planting during sowing, so that the organic matter content of the soil can be increased, the saline-alkali components can be separated from the roots of crops, the stress of the saline-alkali soil on the crops can be effectively reduced, and the yield of the crops can be improved.

The invention relates to the field of dye chemistry, and discloses an acid dye with high color fastness, a preparation method of the acid dye and application of the acid dye in textile dyeing. According to the dye molecule, a 4-sulfo benzene ring and a 2, 5-dichlorobenzene ring are connected through an azo bridge (-N = N-), and a polysulfonate substituent group (-SO3Na) is introduced to a molecular skeleton to form a symmetric azo conjugated structure. The preparation method comprises the steps of nitration, reduction, sulfonation, diazotization, coupling and the like, the process conditions are mild, and the yield is stable. The obtained dye has a strong absorption peak in the range of 540-560nm, and the molar absorption coefficient epsilon is greater than or equal to 1.0 * 10 < 5 > L.mol <-1 >. Cm <-1 >. Compared with the conventional acid red dye, the dye has the advantages that the light fastness can reach grade 8, the fastness to washing is grade 7 or above, the color is bright, the color layer is uniform, the high dye-uptake can be realized under the low-salt condition, the conductivity of waste liquid is remarkably reduced, and the dye is suitable for dyeing protein fibers such as wool, nylon and silk.

To provide crystalline forms of a C-C chemokine receptor type 4 antagonist.SOLUTION: There is provided the compound 2 - ((R) - 3 - (1 - (1 - ((R) - 1 - (2, 4-dichlorophenyl) ethyl) - 3 - (trifluoromethyl) - 1H - pyrazolor3, 4-b] pyrazin-6-yl) azetidin-3-yl) piperidin-1-yl) ethan-1-ol benzenesulfonate in crystalline form.SELECTED DRAWING: Figure 1

An attractant for Telenomus remus Nixon to control Spodoptera litura Fabricicus is provided. The attractant includes a solvent and at least one of the following components: 1,3-dichlorobenzene, benzothiazole, and octane. The attractant can effectively attract Telenomus remus Nixon to parasitize Spodoptera litura Fabricius eggs, such that the growth of a pest quantity is inhibited and the pest population gradually dies out, which achieves the purpose of pest control. The attractant is a green, non-toxic, and pollution-free attraction substance. Therefore, the attractant can solve a series of problems such as pesticide residues, environmental pollution, and food safety caused by chemical control, and is of great significance for the green control of Spodoptera litura Fabricius.

The invention belongs to the technical field of pesticide chemistry, and particularly relates to an application of a substituted phenylhydrazine copper salt complex as an agricultural fungicide, the structural general formula of the substituted phenylhydrazine copper salt complex is [Cu (ArNHNH2) 2] Xn, Ar is selected from 3-chlorphenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, 2, 4-dichlorophenyl-, the compound is prepared from 2, 6-dichlorophenyl, p-trichloromethoxyphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-bromophenyl, 4-nitrophenyl, 4-cyanophenyl and 4-carboxyphenyl, and the compound is prepared from 2, 6-dichlorophenyl, p-trichloromethoxyphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-bromophenyl, 4-nitrophenyl, 4-cyanophenyl and 4-carboxyphenyl. X is selected from SO4 <->, Cl <-> and NO3 <->; n is equal to 1-2. The substituted phenylhydrazine copper salt complex disclosed by the invention has remarkable inhibitory activity on plant pathogenic bacteria, has very high inhibition rate on three plant pathogenic fungi, namely fusarium graminearum, rhizoctonia solani and sclerotium rolfsii, can be used as a safe and efficient novel bactericide, and is applied to prevention and treatment of various crop diseases.

The invention relates to a method for analyzing and detecting a non-azonetin enantiomer, which adopts normal-phase high performance liquid chromatography and takes normal hexane-ethanol-trifluoroacetic acid as a mobile phase to detect the non-azonetin enantiomer, and the specific chromatographic conditions are as follows: a chromatographic column is prepared by covalently bonding amylose-tri (3, 4, 6-trimethyl-1, 3-pentanediol) on the surface of silica gel; 2, 5-dichlorophenyl carbamate is used as a filling agent (IE, 4.6 * 250 mm, 5.0 [mu] m); a mobile phase: n-hexane: ethanol: trifluoroacetic acid = 500: 500: 1 (V / V / V); the flow rate is 1.0 ml / min; the column temperature is 30 DEG C; the sample size is 20 [mu] l; the detection wavelength is 280 nm; the elution gradient is isocratic elution. The invention provides a high performance liquid chromatography method for analyzing the enantiomer of the fiazonetin, the complete separation of the fiazonetin and the enantiomer of the fiazonetin can be realized by adopting the method, and the separation degree of a main component and the enantiomer is greater than 1.5.

The application provides a genetic transformation method of sugarcane variety Liucheng 1541 and belongs to the technical field of plant genetic engineering. The genetic transformation method is that leaf tissues of the sugarcane variety Liucheng 1541 are induced and cultured on a callus induction culture medium containing 2,4-dichlorophenoxyacetic acid and 6-benzylaminopurine; the obtained embryogenic callus is infected by agrobacterium; after co-cultivation and recovery culture, the obtained recovered callus is transferred to a screening culture medium containing glufosinate ammonium for screening culture; then the screened resistant embryogenic callus is inoculated on a differentiation culture medium containing glufosinate ammonium for differentiation culture; and after rooting culture, the transgenic plant of Liucheng 1541 is obtained. The method improves the embryogenic callus induction rate, solves the problem of callus browning in the tissue culture process of the variety Liucheng 1541, determines the glufosinate ammonium screening concentration of the embryogenic callus, and establishes the genetic transformation system of Liucheng 1541.

This invention provides a method for detecting dichloronaphthalene, a persistent organic pollutant in soil sediments. The method includes: collecting soil sediment samples, pre-treating them by freeze-drying, grinding, and sieving to obtain a sample; extracting and purifying the sample using an organic solvent to prepare a test solution; analyzing and detecting the sample using ultra-high performance liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (UPLC-APCI-MS / MS), and calculating the measured value of dichloronaphthalene in the test solution by substituting the obtained peak area and fractionation ratio into a specific formula. This invention fills the gap in my country's technology for detecting dichloronaphthalene-type persistent organic pollutants in soil sediments. This method can effectively eliminate interference from complex matrices, accurately determine trace amounts of six dichloronaphthalene isomers, and has the advantages of high sensitivity, strong anti-interference ability, simple operation, and high detection accuracy.

The invention belongs to the field of metal ion battery material synthesis, and particularly provides a sulfur-doped oxygen-nitrogen-enriched conjugated organic material and application thereof in Li < + > / Zn < 2 + > ion batteries. The preparation method comprises the following steps: firstly, preparing 2, 3, 8, 9, 14, 15-hexachlorodiquinoline [2, 3-a: 2 ', 3'-c] phenazine (HANT-Cl) by taking cyclohexanehexone and dichlorobenzene diamine as raw materials, and then synthesizing 6S6O and the derivative thereof by taking HATN-Cl, sodium sulfide nonahydrate and a naphthoquinone derivative as raw materials. The obtained electrode material contains a plurality of oxidation-reduction active sites, multi-electron storage can be carried out, the transfer rate of electrons is improved through the large pi conjugated structure of the conjugated quinoneazine material, and therefore the high theoretical specific capacity and the excellent rate performance are achieved. Due to the addition of the sulfur element, the oxidation-reduction potential of the material is improved, the energy density of a battery can be improved, and the material has a wide application prospect in a Li < + > / Zn < 2 + > ion battery system.

The present application relates to aripiprazole synthesis technical field, specifically to a kind of preparation of 1-(2,3-dichlorophenyl) piperazine hydrochloride substantially without following dimer impurity compound (I), the structure of the impurity is determined to clarify the generation mechanism of the impurity, provide the train of thought for better control of the impurity and make corresponding judgment to the impurity derived subsequently, provide help to the quality research of subsequent intermediates and finished products;The present application replaces the existing multiple recrystallization process by means of filtration and salting-out, which can effectively simplify the operation and greatly reduce the use of organic solvents.

The invention relates to a preparation method of a fluorescence sensor. The invention relates to a preparation method of a portable pesticide detection fluorescence sensor of silver nanocluster (AgNCs) at zeolite imidazolate skeleton (ZIF) at polydopamine (PDA) and application of the portable pesticide detection fluorescence sensor in on-site rapid detection of 2, 4-dichlorophenoxyacetic acid (2, 4-D), and belongs to the technical field of fluorescence sensors. The method comprises the following steps: wrapping AgNCs with ZIF, and modifying the surface of the AgNCs with dopamine to form an AgNCs-ZIF-PDA composite material with high stability, high fluorescence enhancement, high enzyme responsiveness and high controllability; then, the material is integrated into a nano clay-acrylamide hydrogel matrix with high fitness, and a sensor with an adjustable shape is constructed. The sensor can be adaptively attached to the surface of a plant and is used for long-term in-situ monitoring of 2, 4-D pesticide. And in combination with an image processing algorithm, the system realizes accurate tracking of the tomato plant surface 2, 4-D degradation process, and the detection limit reaches 23.3 ng / mL. According to the invention, non-intrusive and low-cost technical support is provided for crop health management and sustainable precision agriculture.

The application relates to the technical field of propiconazole synthesis, in particular to a method for synthesizing propiconazole by using ionic liquid catalysis and a solvent-free method, which comprises the following steps: S1, under the condition of room temperature, 1,2,4-triazole sodium or 1,2,4-triazole potassium and 1-4 carbon atom organic alcohol solvent are mixed, a quaternary ammonium salt is added, reflux is carried out for 10 hours, and insoluble substances are removed through filtration; 1-4 carbon atom organic alcohol solvent is removed through distillation, and transparent colorless 1,2,4-triazole-quaternary ammonium ionic liquid is obtained; S2, 2-(2,4-dichlorophenyl)-2-bromomethyl-4-propyl-1,3-dioxolane is mixed with the 1,2,4-triazole-quaternary ammonium ionic liquid, the temperature is increased to 150-160 DEG C, reaction is carried out for 10-15 hours, the temperature is decreased, post-treatment is carried out, and propiconazole with a purity of more than 98% is obtained. The method has the advantages that impurities are reduced, the purity and yield of propiconazole are improved, post-treatment is simple, and wastewater is extremely small, and is a valuable method for industrialization popularization and application.

Provided are L-arginine salts of 4-chloro-5-[4-(2, 6-dichlorophenyl) sulfonylpiperazin-1-yl]-1-benzofuran-2-carboxylic acid, and forms thereof, as well as methods for preparing the same. Also provided are pharmaceutical or veterinary compositions comprising the L-arginine salts and their use for the treatment of a number of diseases.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of furosemide. The preparation method of furosemide comprises the following steps: chlorosulfonation: reacting chlorosulfonic acid and 2,4-dichlorobenzoic acid, hydrolyzing, filtering, and obtaining 2,4-dichloro-5-sulfonyl chlorobenzoic acid; amination: adding 2,4-dichloro-5-sulfonyl chlorobenzoic acid into ammonia water, reacting, neutralizing, filtering, purifying, and obtaining 2,4-dichloro-5-sulfonamidobenzoic acid; condensation: reacting 2-furfurylamine and 2,4-dichloro-5-sulfonamidobenzoic acid, and obtaining furosemide crude product; decolorization: adding the furosemide crude product into a saturated sodium bicarbonate solution, adding activated carbon for decolorization, neutralizing, and crystallizing, and thus furosemide product is obtained. The raw material used in the application is easy to obtain and low in price, the comprehensive reaction period is short, the amount of hazardous waste generated is small, the prepared furosemide is high in purity and high in total yield, the comprehensive cost of the whole preparation process is low, and the application is suitable for industrial production.

The invention relates to the technical field of phenolic resin, and discloses high-temperature-resistant phenolic resin and a preparation method thereof.Polytetrahydrofuran ether glycol and diphenylmethane diisocyanate are used for synthesizing a polyurethane prepolymer, a flexible chain segment is introduced, then a phenolic hydroxyl terminated polymer containing cyano groups is prepared through a condensation reaction of magnolol and dichlorobenzonitrile, and the high-temperature-resistant phenolic resin is prepared. Introducing a heat-resistant functional group into the system, and then combining the two prepolymers under the action of a catalyst to form a phenol-based intermediate; and then carrying out polycondensation on the intermediate, phenol and formaldehyde under an acidic condition to generate the cyano-modified phenolic resin. And finally, blending with boron phenolic resin to obtain the high-temperature-resistant phenolic resin. The high-temperature-resistant phenolic resin provided by the invention has better heat resistance and the preparation method thereof.

The invention discloses a novel ginseng stem cell culture system which comprises a basic culture medium and a growth regulation composition, and the basic culture medium comprises ammonium sulfate, monopotassium phosphate, magnesium sulfate heptahydrate and calcium chloride; the growth regulating composition comprises 2, 4-dichlorphenoxyacetic acid, zeatin, salicylic acid and natural polysaccharide. The basic culture medium also comprises casein hydrolysate, coconut water extract and cane sugar. The composition also comprises an anti-oxidation composition. The invention further discloses a disposable flexible bioreactor for ginseng stem cell culture, the bioreactor comprises a tank body made of a flexible material, an air distribution device, a sterile sampling device and an online parameter monitoring device, and the top of the tank body structure is a cylindrical body and is provided with an inoculation opening, a culture medium liquid supplementing opening, an air outlet and a sampling opening; the bottom is an inverted cone provided with a parameter monitoring device interface and an air inlet, and the air inlet is connected with a ventilation device and an air flow adjusting device. The invention also discloses application of the culture system and the bioreactor.

This invention relates to a method for determining the migration amounts of 4,4'-biphenyl and 1,1'-sulfonyl di(4-chlorobenzene), belonging to the technical field of migration amount determination. The method includes the following steps: S1: conducting a migration experiment; S2: treating the soaking solution; S3: preparing a chemical substitute solution; taking 2 mL of the chemical substitute reagent (95% ethanol or isooctane) soaking solution obtained after the migration experiment into a 10 mL stoppered graduated glass tube, accurately adding 50 μL of dimethyl sulfoxide, mixing, blowing with nitrogen to near dryness under a 45°C water bath, making up to 2 mL with acetonitrile-water solution (1+1), mixing, filtering through a microporous membrane, and preparing for determination; S4: preparing a blank solution; S5: sample determination; S6: blank determination; S7: verifying the recovery rate and precision of the method using the above blank sample, selecting the detection limit and quantitation limit for two-level experiments at two concentrations.

A preparation method of a three-dimensional self-supporting phenolic resin derived carbon (at) carbon nanotube sponge comprises the following steps: step 1, injecting a ferrocene and dichlorobenzene carbon source solution into a reaction furnace in a hydrogen / argon mixed atmosphere to obtain a carbon nanotube sponge; step 2, dissolving resorcinol and hexamethylenetetramine in the deionized water; cutting a carbon nanotube sponge into proper small blocks, putting the small blocks into the mixed solution, transferring the small blocks into an oil bath pan, carrying out stirring heat treatment / autoclave heat treatment for a period of time, standing overnight, and cooling to room temperature, so as to obtain resorcinol and hexamethylenetetramine prepolymer coated carbon nanotube sponge; step 3, taking out the resorcinol and hexamethylenetetramine prepolymer coated carbon nanotube sponge, washing, and then freeze-drying to maintain the three-dimensional porous network structure; and finally, carrying out high-temperature annealing treatment to obtain the three-dimensional self-supporting phenolic resin derived carbon-coated carbon nanotube sponge. The integrated self-supporting composite electrode is successfully constructed through a three-dimensional network in-situ synthesis process.

The invention discloses a preparation method of a high-temperature durable epoxy resin coating, and relates to the technical field of epoxy resin coatings. The novel epoxy resin is prepared from 1, 3, 5-tris (2-propynyloxy) benzene, 3-azido butanol and glycidyl methacrylate as raw materials, the novel epoxy resin has multiple functional groups, the crosslinking degree of the coating can be improved, the epoxy resin coating can have high thermal stability due to introduction of a benzene ring and a triazole structure, and the epoxy resin coating can be applied to the field of coating materials. The heat resistance of the coating is improved; secondly, grafting 2-benzoyl-4, 5-dichlorobenzoic acid onto calcium silicate, and then hydrolyzing to prepare a novel hindered phenol antioxidant; calcium silicate is used for loading the antioxidant, a stable loading platform can be provided for the antioxidant, and active groups on the surface and the antioxidant generate a synergistic effect, so that the oxidation resistance is further improved, the anti-aging performance of the coating is improved, and the service life of the coating is prolonged. The high-temperature durable epoxy resin coating prepared by the invention has the effects of high temperature resistance and durability.